@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap');

/* ═══════════════════════════════════════════════════════
   Design Tokens — Apple-inspired School System
   ═══════════════════════════════════════════════════════ */
:root {
    --c-bg: #F2F2F7;
    --c-card: #FFFFFF;
    --c-primary: #007AFF;
    --c-primary-hover: #0060D0;
    --c-primary-bg: #EBF4FF;
    --c-text: #1C1C1E;
    --c-text2: #636366;
    --c-text3: #AEAEB2;
    --c-border: #E5E5EA;
    --c-border-light: #F2F2F7;
    --c-success: #34C759;
    --c-success-bg: #EAFAF1;
    --c-warn: #FF9500;
    --c-warn-bg: #FFF8EC;
    --c-danger: #FF3B30;
    --c-danger-bg: #FFF0F0;
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 22px;
    --r-full: 9999px;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --fs-title: 1.3rem;
    --fs-headline: 1rem;
    --fs-body: 0.9rem;
    --fs-caption: 0.8rem;
    --fs-micro: 0.72rem;
    --transition: 0.2s cubic-bezier(.4,0,.2,1);
}

/* ═══ Reset & Base ═══ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    background: var(--c-bg);
    min-height: 100vh;
    color: var(--c-text);
    -webkit-font-smoothing: antialiased;
}

/* ═══ Container ═══ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.75rem 1rem;
}

/* ═══ Header ═══ */
header {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 0.7rem 1.5rem;
    border-radius: var(--r-lg);
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(255,255,255,0.6);
}

header h1 {
    color: var(--c-text);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-info span {
    font-weight: 600;
    color: var(--c-text2);
    font-size: var(--fs-body);
}

.logout-btn {
    background: var(--c-danger);
    color: white;
    border: none;
    padding: 0.4rem 0.9rem;
    border-radius: var(--r-full);
    cursor: pointer;
    font-size: var(--fs-caption);
    font-weight: 600;
    font-family: inherit;
    transition: all var(--transition);
}

.logout-btn:hover {
    background: #E5342C;
    transform: scale(1.03);
}

/* ═══ Main ═══ */
main { min-height: 400px; }

main.login-mode {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

/* ═══ App Layout (Sidebar + Content) ═══ */
.app-layout {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    min-height: 600px;
}

.sidebar {
    width: 200px;
    flex-shrink: 0;
    background: var(--c-card);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    position: sticky;
    top: 1rem;
    border: 1px solid var(--c-border);
}

.sidebar-user-info {
    background: linear-gradient(145deg, #007AFF 0%, #5AC8FA 100%);
    padding: 1.1rem 1rem;
    text-align: center;
}

.sidebar-avatar { font-size: 1.6rem; margin-bottom: 0.3rem; }

.sidebar-user-name {
    color: #fff;
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 0.15rem;
}

.sidebar-user-sub {
    color: rgba(255,255,255,0.75);
    font-size: var(--fs-micro);
}

.sidebar-nav { padding: 0.4rem 0.5rem; }

.nav-group-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--c-text3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.6rem 0.6rem 0.2rem;
    margin-top: 0.1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.55rem 0.7rem;
    color: var(--c-text2);
    cursor: pointer;
    font-size: 0.84rem;
    font-weight: 500;
    border-radius: var(--r-sm);
    transition: all var(--transition);
    user-select: none;
    border: none;
    margin: 1px 0;
}

.nav-item:hover {
    background: var(--c-primary-bg);
    color: var(--c-primary);
}

.nav-item.active {
    background: var(--c-primary);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,122,255,0.25);
}

.nav-item.external { color: var(--c-text3); }
.nav-item.external:hover { color: var(--c-primary); }

.nav-icon {
    font-size: 0.9rem;
    width: 1.1rem;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-divider {
    height: 1px;
    background: var(--c-border);
    margin: 0.3rem 0.6rem;
}

.content-area {
    flex: 1;
    min-width: 0;
    background: var(--c-card);
    border-radius: var(--r-lg);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    min-height: 500px;
    border: 1px solid var(--c-border);
    animation: contentFadeIn 0.25s ease-out;
}

@keyframes contentFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ═══ Responsive Sidebar ═══ */
@media (max-width: 680px) {
    .app-layout { flex-direction: column; }
    .sidebar { width: 100%; position: static; border-radius: var(--r-md); }
    .sidebar-user-info { padding: 0.8rem; }
    .sidebar-avatar { font-size: 1.2rem; margin-bottom: 0.15rem; }
    .sidebar-user-name { font-size: var(--fs-caption); }
    .sidebar-nav {
        display: flex;
        flex-wrap: wrap;
        padding: 0.3rem;
        gap: 0.2rem;
    }
    .nav-item {
        flex-direction: column;
        gap: 0.1rem;
        padding: 0.4rem 0.6rem;
        font-size: 0.7rem;
        border-radius: var(--r-sm);
        min-width: 0;
    }
    .nav-item.active { box-shadow: none; }
    .nav-icon { font-size: 1rem; }
    .sidebar-divider, .nav-group-label { display: none; }
}

/* ═══ Login ═══ */
.login-form {
    max-width: 420px;
    margin: 1.5rem auto 2rem;
    background: var(--c-card);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: fadeUp 0.4s ease-out;
    border: 1px solid var(--c-border);
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.login-hero {
    background: linear-gradient(145deg, #007AFF 0%, #5AC8FA 100%);
    padding: 2.2rem 2rem 1.8rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-hero::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px;
    width: 140px; height: 140px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
}

.login-hero::after {
    content: '';
    position: absolute;
    bottom: -35px; left: -35px;
    width: 100px; height: 100px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.school-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.6rem;
    line-height: 1;
    position: relative;
    z-index: 1;
}

.login-hero h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.3rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.login-tagline {
    color: rgba(255,255,255,0.7);
    font-size: var(--fs-caption);
    position: relative;
    z-index: 1;
}

.login-body { padding: 1.75rem; }

/* ═══ Form Elements ═══ */
.form-group { margin-bottom: 1.1rem; }

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    color: var(--c-text2);
    font-size: var(--fs-caption);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1.5px solid var(--c-border);
    border-radius: var(--r-sm);
    font-size: var(--fs-body);
    font-family: inherit;
    background: var(--c-bg);
    transition: all var(--transition);
    outline: none;
    color: var(--c-text);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--c-text3); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--c-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(0,122,255,0.1);
}

button[type="button"],
button[type="submit"] {
    width: 100%;
    padding: 0.78rem;
    background: var(--c-primary);
    color: white;
    border: none;
    border-radius: var(--r-sm);
    font-size: var(--fs-body);
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(0,122,255,0.25);
}

button[type="button"]:hover,
button[type="submit"]:hover {
    background: var(--c-primary-hover);
    box-shadow: 0 4px 14px rgba(0,122,255,0.35);
    transform: translateY(-1px);
}

button[type="button"]:active,
button[type="submit"]:active {
    transform: scale(0.98) translateY(0);
    box-shadow: 0 1px 4px rgba(0,122,255,0.2);
}

/* ═══ Grade / Class Buttons ═══ */
.grade-buttons, .class-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 0.8rem 0;
}

.grade-btn, .class-btn {
    padding: 0.75rem;
    font-size: var(--fs-body);
    font-weight: 600;
    font-family: inherit;
    border: 2px solid var(--c-border);
    border-radius: var(--r-sm);
    background: var(--c-bg);
    color: var(--c-text2);
    cursor: pointer;
    transition: all var(--transition);
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
}

.grade-btn:hover, .class-btn:hover {
    border-color: var(--c-primary);
    background: var(--c-primary-bg);
    color: var(--c-primary);
    transform: translateY(-1px);
}

.grade-btn.selected, .class-btn.selected {
    border-color: var(--c-primary);
    background: var(--c-primary);
    color: white;
    box-shadow: 0 2px 10px rgba(0,122,255,0.3);
}

.grade-selection h3, .class-selection h3 {
    text-align: center;
    color: var(--c-text);
    margin-bottom: 0.8rem;
    font-size: var(--fs-headline);
    font-weight: 600;
}

.back-btn {
    width: 100%;
    padding: 0.6rem;
    margin-top: 0.8rem;
    background: transparent;
    border: 1.5px solid var(--c-border);
    border-radius: var(--r-sm);
    color: var(--c-text3);
    font-family: inherit;
    font-size: var(--fs-caption);
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: none;
}

.back-btn:hover {
    background: var(--c-bg);
    border-color: var(--c-text3);
    color: var(--c-text2);
    transform: none;
    box-shadow: none;
}

/* ═══ Menu Grid ═══ */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.menu-icon {
    font-size: 2rem;
    margin-bottom: 0.6rem;
    display: block;
    line-height: 1;
    transition: transform 0.2s;
}

.menu-item {
    background: var(--c-card);
    padding: 1.5rem;
    border-radius: var(--r-md);
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.menu-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    border-radius: 3px 0 0 3px;
    transform: scaleY(0);
    transition: transform 0.2s;
}

.menu-grid .menu-item:nth-child(1)::before { background: var(--c-primary); }
.menu-grid .menu-item:nth-child(2)::before { background: var(--c-success); }
.menu-grid .menu-item:nth-child(3)::before { background: var(--c-warn); }
.menu-grid .menu-item:nth-child(4)::before { background: #AF52DE; }

.menu-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--c-primary);
}

.menu-item:hover .menu-icon { transform: scale(1.08); }
.menu-item:hover::before { transform: scaleY(1); }

.menu-grid .menu-item:nth-child(1):hover { border-color: #b3d4ff; }
.menu-grid .menu-item:nth-child(2):hover { border-color: #a0e6c0; }
.menu-grid .menu-item:nth-child(3):hover { border-color: #ffe0a0; }
.menu-grid .menu-item:nth-child(4):hover { border-color: #dbb8f0; }

.menu-item h3 {
    color: var(--c-text);
    font-size: var(--fs-headline);
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.menu-item p {
    color: var(--c-text2);
    font-size: var(--fs-caption);
    line-height: 1.5;
}

.menu-item.disabled {
    background: var(--c-bg);
    border-color: var(--c-border);
    cursor: not-allowed;
    opacity: 0.5;
}
.menu-item.disabled:hover { transform: none; box-shadow: var(--shadow-xs); border-color: var(--c-border); }
.menu-item.disabled:hover .menu-icon { transform: none; }
.menu-item.disabled::before { display: none; }
.menu-item.disabled h3 { color: var(--c-text3); }
.menu-item.disabled p  { color: var(--c-text3); }

/* ═══ Admin Dashboard ═══ */
.admin-dashboard h2 {
    color: var(--c-text);
    text-align: center;
    font-size: var(--fs-title);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-item {
    background: linear-gradient(145deg, #007AFF 0%, #5AC8FA 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--r-md);
    text-align: center;
    box-shadow: 0 4px 16px rgba(0,122,255,0.2);
    transition: transform var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-item::after {
    content: '';
    position: absolute;
    top: -25px; right: -25px;
    width: 80px; height: 80px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    pointer-events: none;
}

.stat-item:hover { transform: translateY(-3px); }

.stat-item h3 {
    font-size: var(--fs-caption);
    font-weight: 500;
    opacity: 0.8;
    margin-bottom: 0.5rem;
}

.stat-item span {
    font-size: 2.2rem;
    font-weight: 700;
    display: block;
    line-height: 1;
}

.admin-menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.admin-menu-grid .menu-item:nth-child(1)::before { background: var(--c-primary); }
.admin-menu-grid .menu-item:nth-child(2)::before { background: var(--c-success); }
.admin-menu-grid .menu-item:nth-child(3)::before { background: var(--c-warn); }
.admin-menu-grid .menu-item:nth-child(4)::before { background: #AF52DE; }
.admin-menu-grid .menu-item:nth-child(5)::before { background: #FF2D55; }
.admin-menu-grid .menu-item:nth-child(6)::before { background: #5AC8FA; }
.admin-menu-grid .menu-item:nth-child(7)::before { background: #FF9500; }

.admin-menu-grid .menu-item:nth-child(1):hover { border-color: #b3d4ff; }
.admin-menu-grid .menu-item:nth-child(2):hover { border-color: #a0e6c0; }
.admin-menu-grid .menu-item:nth-child(3):hover { border-color: #ffe0a0; }
.admin-menu-grid .menu-item:nth-child(4):hover { border-color: #dbb8f0; }
.admin-menu-grid .menu-item:nth-child(5):hover { border-color: #ffb3c0; }
.admin-menu-grid .menu-item:nth-child(6):hover { border-color: #b3e5f7; }
.admin-menu-grid .menu-item:nth-child(7):hover { border-color: #ffe0a0; }

/* ═══ Schedule Container ═══ */
.schedule-container {
    max-width: 1100px;
    margin: 0 auto;
    background: transparent;
    padding: 0;
}

.facility-tabs {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.facility-tab {
    padding: 0.5rem 1.3rem;
    background: var(--c-bg);
    border: 1.5px solid var(--c-border);
    border-radius: var(--r-full);
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 600;
    font-family: inherit;
    font-size: var(--fs-caption);
    color: var(--c-text2);
    box-shadow: none;
}

.facility-tab.active {
    background: var(--c-primary);
    border-color: var(--c-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0,122,255,0.25);
}

.facility-tab:hover:not(.active) {
    border-color: var(--c-primary);
    color: var(--c-primary);
    background: var(--c-primary-bg);
}

.date-selector {
    text-align: center;
    margin-bottom: 0.5rem;
}

.date-selector label {
    display: inline;
    margin-right: 0.5rem;
    font-weight: 600;
    color: var(--c-text);
    font-size: var(--fs-body);
}

.date-selector input[type="date"],
.date-selector input[type="week"],
.date-selector select {
    padding: 0.55rem 0.9rem;
    border: 1.5px solid var(--c-border);
    border-radius: var(--r-sm);
    font-size: var(--fs-body);
    font-family: inherit;
    background: var(--c-bg);
    outline: none;
    min-width: 190px;
    transition: border-color var(--transition);
    color: var(--c-text);
}

.date-selector input:focus,
.date-selector select:focus {
    border-color: var(--c-primary);
    background: #fff;
}

.date-selector input[type="date"]:invalid {
    background: var(--c-bg);
    color: var(--c-text3);
    cursor: not-allowed;
}

/* Week Buttons */
.week-buttons {
    display: inline-flex;
    gap: 0.4rem;
    justify-content: center;
    vertical-align: middle;
    background: var(--c-bg);
    border-radius: var(--r-sm);
    padding: 3px;
}

.week-btn {
    padding: 0.4rem 1rem;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--c-text2);
    font-size: var(--fs-caption);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    min-width: 80px;
    box-shadow: none;
}

.week-btn:hover:not(.active) {
    color: var(--c-text);
}

.week-btn.active {
    background: var(--c-card);
    color: var(--c-primary);
    box-shadow: var(--shadow-xs);
    font-weight: 700;
}

/* ═══ Weekly Schedule Table ═══ */
.weekly-schedule-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--c-card);
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
    margin-top: 0.5rem;
    table-layout: fixed;
}

.weekly-schedule-table th {
    background: var(--c-bg);
    color: var(--c-text2);
    font-weight: 600;
    padding: 0.45rem 0.3rem;
    text-align: center;
    border-bottom: 1px solid var(--c-border);
    font-size: var(--fs-micro);
    width: calc((100% - 90px) / 5);
}

.weekly-schedule-table th.today-col {
    background: var(--c-primary-bg);
    color: var(--c-primary);
    font-weight: 700;
}

.weekly-schedule-table th.period-header {
    background: var(--c-bg);
    font-size: var(--fs-micro);
    width: 90px;
    min-width: 90px;
    max-width: 90px;
}

.weekly-schedule-table td {
    padding: 0 !important;
    border: 1px solid var(--c-border-light);
    position: relative;
    height: 44px;
    width: calc((100% - 90px) / 5);
}

.weekly-schedule-table td.today-col {
    background: rgba(0,122,255,0.03);
}

/* ═══ Schedule Cells ═══ */
.schedule-cell {
    width: 100%;
    height: 100%;
    min-height: 44px;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: all 0.15s;
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    margin: 0; padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-size: var(--fs-micro);
    font-weight: 500;
    border-radius: 0;
    box-shadow: none;
}

.schedule-cell.available {
    background: #f0fdf4;
    color: var(--c-text3);
}

.schedule-cell.available:hover {
    background: #dcfce7;
    box-shadow: inset 0 0 0 2px var(--c-success);
}

.schedule-cell.occupied {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    cursor: not-allowed;
}

.schedule-cell.my-reservation {
    background: #FFFBEB;
    color: #92400E;
    font-weight: 700;
    cursor: pointer;
    border: 2px solid #FBBF24;
}

.schedule-cell.my-reservation:hover {
    background: #FEF08A;
}

.schedule-cell.default-assigned {
    background: var(--c-warn-bg);
    color: #92400E;
    cursor: not-allowed;
}

.schedule-cell.assigned-available {
    background: #f0fdf4;
    color: #166534;
    cursor: pointer;
}

.schedule-cell.assigned-available:hover {
    background: #dcfce7;
    box-shadow: inset 0 0 0 2px var(--c-success);
}

.schedule-cell.limit-reached {
    background: var(--c-bg);
    color: var(--c-text3);
    cursor: not-allowed;
}

.schedule-cell.disabled {
    background-color: var(--c-bg);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100' preserveAspectRatio='none'%3E%3Cline x1='0' y1='0' x2='100' y2='100' stroke='%23C7C7CC' stroke-width='3'/%3E%3Cline x1='100' y1='0' x2='0' y2='100' stroke='%23C7C7CC' stroke-width='3'/%3E%3C/svg%3E");
    background-size: 100% 100%;
    color: transparent;
    cursor: not-allowed;
    pointer-events: none;
}

.schedule-cell.lunch-time {
    background: #FFFBEB;
    color: #A16207;
    cursor: not-allowed;
    pointer-events: none;
    font-size: var(--fs-micro);
    font-weight: 600;
}

.schedule-cell.past-date {
    background: var(--c-bg) !important;
    color: var(--c-text3) !important;
    cursor: not-allowed !important;
}

.schedule-cell.past-date:hover {
    background: var(--c-bg) !important;
    box-shadow: none !important;
}

/* Facility Color Codes */
.schedule-cell.computer-reservation {
    background: #E3F2FD !important;
    color: #1565C0 !important;
    border: 1px solid #90CAF9 !important;
    font-weight: 700;
}

.schedule-cell.router-reservation {
    background: #FFF3E0 !important;
    color: #E65100 !important;
    border: 1px solid #FFCC80 !important;
    font-weight: 700;
}

.schedule-cell.info2-reservation {
    background: #F3E5F5 !important;
    color: #6A1B9A !important;
    border: 1px solid #CE93D8 !important;
    font-weight: 700;
}

.schedule-cell.music-reservation {
    background: #FCE4EC !important;
    color: #AD1457 !important;
    border: 1px solid #F48FB1 !important;
    font-weight: 700;
}

.schedule-cell.library-reservation {
    background: #E8F5E9 !important;
    color: #2E7D32 !important;
    border: 1px solid #A5D6A7 !important;
    font-weight: 700;
}

/* ═══ Reservation Widget ═══ */
.reservation-widget {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    background: var(--c-bg);
    border-radius: var(--r-md);
    border: 1px solid var(--c-border);
    width: 100%;
}

.reservation-widget.has-reservations {
    background: var(--c-success-bg);
    border-color: #A5D6A7;
}

.widget-header {
    font-size: var(--fs-body);
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 0.6rem;
    text-align: center;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--c-border);
}

.reservation-widget.has-reservations .widget-header {
    color: #2E7D32;
    border-bottom-color: #A5D6A7;
}

.reservation-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.has-reservation-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.65rem;
    background: #E8F5E9;
    border-radius: var(--r-sm);
    border-left: 3px solid var(--c-success);
}

.no-reservation {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.65rem;
    background: var(--c-bg);
    border-radius: var(--r-sm);
    border-left: 3px solid var(--c-text3);
    color: var(--c-text3);
    font-size: var(--fs-caption);
}

.facility-name {
    font-weight: 700;
    color: #2E7D32;
    min-width: 80px;
    font-size: var(--fs-caption);
}

.reservation-details {
    font-weight: 500;
    color: #1B5E20;
    font-size: var(--fs-caption);
}

/* ═══ Facility Info ═══ */
.facility-info {
    text-align: center;
    margin: 1rem 0;
}

.facility-name {
    display: inline-block;
    padding: 0.45rem 1.1rem;
    background: var(--c-primary);
    color: white;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-size: var(--fs-body);
    box-shadow: 0 2px 8px rgba(0,122,255,0.2);
}

/* ═══ Legend ═══ */
.schedule-legend {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin: 0.4rem 0;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: var(--fs-micro);
    color: var(--c-text2);
    font-weight: 500;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    border: 1.5px solid;
    flex-shrink: 0;
}

.legend-available  { background: #f0fdf4; border-color: var(--c-success); }
.legend-occupied   { background: var(--c-danger-bg); border-color: var(--c-danger); }
.legend-mine       { background: #FFFBEB; border-color: #FBBF24; }
.legend-assigned   { background: #E8F5E9; border-color: var(--c-success); }
.legend-default    { background: var(--c-warn-bg); border-color: var(--c-warn); }
.legend-limit      { background: var(--c-bg); border-color: var(--c-text3); }

/* Facility Legend */
.facility-legend {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin: 0.4rem 0;
    padding: 0.4rem;
    background: var(--c-bg);
    border-radius: var(--r-sm);
    flex-wrap: wrap;
}

.facility-legend .legend-item {
    font-size: var(--fs-caption);
    font-weight: 600;
}

.facility-legend .legend-color {
    width: 12px; height: 12px;
    border-radius: 3px;
    border: 1px solid rgba(0,0,0,0.08);
}

.computer-color { background: var(--c-primary); }
.router-color   { background: var(--c-warn); }
.info2-color    { background: #AF52DE; }
.music-color    { background: #FF2D55; }
.library-color  { background: var(--c-success); }

/* ═══ Modal ═══ */
.reservation-modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.reservation-modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--c-card);
    padding: 1.75rem;
    border-radius: var(--r-xl);
    max-width: 380px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    transform: scale(0.92);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--c-border);
}

.reservation-modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    text-align: center;
    margin-bottom: 1.25rem;
}

.modal-header h3 {
    color: var(--c-text);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.modal-header p {
    color: var(--c-text2);
    font-size: var(--fs-caption);
}

.modal-form { margin-bottom: 1rem; }

.modal-actions {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
}

.modal-btn {
    padding: 0.6rem 1.3rem;
    border: none;
    border-radius: var(--r-sm);
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    min-width: 90px;
    font-size: var(--fs-body);
}

.modal-btn.primary {
    background: var(--c-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(0,122,255,0.25);
}

.modal-btn.primary:hover {
    background: var(--c-primary-hover);
    transform: translateY(-1px);
}

.modal-btn.secondary {
    background: var(--c-bg);
    color: var(--c-text2);
    box-shadow: none;
}

.modal-btn.secondary:hover {
    background: var(--c-border);
}

/* ═══ Request Form ═══ */
.request-form {
    max-width: 560px;
    margin: 0 auto;
    padding: 1.75rem;
    background: var(--c-card);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--c-border);
    animation: fadeUp 0.3s ease-out;
}

.request-form h2 {
    color: var(--c-text);
    margin-bottom: 1.5rem;
    text-align: center;
    font-size: var(--fs-title);
    font-weight: 700;
}

/* ═══ Science Supplies Checkbox Grid ═══ */
.sci-supplies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.sci-supply-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 0.75rem;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    cursor: pointer;
    font-size: var(--fs-caption);
    transition: var(--transition);
    user-select: none;
}

.sci-supply-item:hover {
    border-color: var(--c-primary);
    background: var(--c-primary-bg);
}

.sci-supply-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--c-primary);
    flex-shrink: 0;
}

.sci-supply-item input[type="checkbox"]:checked + span {
    color: var(--c-primary);
    font-weight: 500;
}

/* ═══ Science Prep Teacher ═══ */

/* 로그인 버튼 */
.sci-prep-btn {
    background: linear-gradient(135deg, #5856D6, #AF52DE) !important;
    color: #fff !important;
    border: none !important;
    font-weight: 600 !important;
    width: 100%;
}
.sci-prep-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* 사이드바 알림 배지 */
.nav-badge {
    background: var(--c-danger);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: var(--r-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    padding: 0 5px;
}

/* 통계 카드 */
.sci-prep-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin: 1rem 0;
}
.sci-prep-stat {
    background: var(--c-card);
    border-radius: var(--r-lg);
    padding: 1.2rem;
    text-align: center;
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
}
.sci-prep-stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.3rem;
}
.sci-prep-stat-label {
    font-size: var(--fs-caption);
    color: var(--c-text2);
}
.pending-stat .sci-prep-stat-num { color: var(--c-warn); }
.confirmed-stat .sci-prep-stat-num { color: var(--c-success); }
.total-stat .sci-prep-stat-num { color: var(--c-primary); }

/* 신청 카드 */
.sci-prep-cards {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.sci-prep-card {
    background: var(--c-card);
    border-radius: var(--r-lg);
    padding: 1.1rem;
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.sci-prep-card:hover {
    box-shadow: var(--shadow-md);
}
.sci-prep-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.6rem;
}
.sci-prep-card-requester {
    font-weight: 600;
    font-size: var(--fs-body);
    color: var(--c-text);
}
.sci-prep-card-date {
    font-size: var(--fs-caption);
    color: var(--c-primary);
    font-weight: 500;
}
.sci-prep-card-info { margin-bottom: 0.5rem; }
.sci-prep-card-unit {
    font-size: var(--fs-caption);
    color: var(--c-text2);
    margin-top: 0.15rem;
}
.sci-prep-card-exp {
    font-size: var(--fs-caption);
    color: var(--c-text3);
}
.sci-prep-card-supplies {
    background: var(--c-bg);
    border-radius: var(--r-sm);
    padding: 0.6rem 0.75rem;
    font-size: var(--fs-caption);
    color: var(--c-text);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}
.sci-prep-card-meta {
    display: flex;
    gap: 1rem;
    font-size: var(--fs-micro);
    color: var(--c-text3);
    margin-bottom: 0.4rem;
}
.sci-prep-card-note {
    font-size: var(--fs-micro);
    color: var(--c-warn);
    margin-bottom: 0.5rem;
}
.sci-prep-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.6rem;
}
.sci-prep-confirm-btn {
    flex: 1;
    padding: 0.55rem 1rem;
    background: var(--c-success);
    color: #fff;
    border: none;
    border-radius: var(--r-sm);
    font-size: var(--fs-caption);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}
.sci-prep-confirm-btn:hover { background: #2db84e; }
.sci-prep-confirm-btn.small,
.sci-prep-reject-btn.small {
    flex: none;
    padding: 0.35rem 0.7rem;
    font-size: var(--fs-micro);
}
.sci-prep-reject-btn {
    flex: 0.5;
    padding: 0.55rem 1rem;
    background: var(--c-bg);
    color: var(--c-danger);
    border: 1px solid var(--c-danger);
    border-radius: var(--r-sm);
    font-size: var(--fs-caption);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.sci-prep-reject-btn:hover { background: var(--c-danger-bg); }

/* 상태 배지 */
.sci-status-badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 600;
}
.sci-status-pending { background: var(--c-warn-bg); color: var(--c-warn); }
.sci-status-confirmed { background: var(--c-success-bg); color: var(--c-success); }
.sci-status-rejected { background: var(--c-danger-bg); color: var(--c-danger); }
.sci-status-approved { background: var(--c-success-bg); color: var(--c-success); }

/* ── 과학전담 대시보드 히어로 ── */
.sci-prep-hero {
    background: linear-gradient(145deg, #5856D6, #AF52DE);
    border-radius: var(--r-lg);
    padding: 1.1rem 1.2rem;
    margin-bottom: 1rem;
    color: white;
    position: relative;
    overflow: hidden;
}
.sci-prep-hero::after {
    content: '';
    position: absolute;
    top: -30px; right: -30px;
    width: 100px; height: 100px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}
.sci-prep-hero.has-pending {
    background: linear-gradient(145deg, #FF9500, #FF3B30);
}
.sci-prep-hero-label {
    font-size: var(--fs-micro);
    font-weight: 600;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}
.sci-prep-hero-content {
    font-size: var(--fs-body);
    font-weight: 600;
    line-height: 1.5;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.sci-prep-hero-num {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

/* ── 과학전담 D-Day 태그 ── */
.sci-prep-dday {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 700;
    background: var(--c-primary-bg);
    color: var(--c-primary);
}
.sci-prep-dday.urgent {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ── 과학전담 카드 레이아웃 개선 ── */
.sci-prep-card-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sci-prep-card-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sci-prep-card-grade-tag {
    display: inline-block;
    padding: 0.1rem 0.45rem;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 600;
    background: var(--c-primary-bg);
    color: var(--c-primary);
}
.sci-prep-card-experiment {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}
.sci-prep-card-unit-tag {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 600;
    background: #F3E5F5;
    color: #7B1FA2;
}
.sci-prep-card-exp-name {
    font-size: var(--fs-caption);
    font-weight: 600;
    color: var(--c-text);
}
.sci-prep-card.urgent {
    border-left: 3px solid var(--c-danger);
    background: #FFFBFB;
}

/* ── 준비물 태그 ── */
.sci-supply-tag {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    margin: 0.15rem 0.1rem;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 500;
    background: var(--c-bg);
    color: var(--c-text);
    border: 1px solid var(--c-border);
}

/* ── 2주 캘린더 ── */
.sci-week-section {
    margin-bottom: 0.5rem;
}
.sci-week-label {
    font-size: var(--fs-caption);
    font-weight: 700;
    color: var(--c-text2);
    margin-bottom: 0.3rem;
    padding-left: 0.1rem;
}
.sci-week-days {
    display: flex;
    gap: 0.35rem;
}
.sci-cal-day {
    flex: 1;
    text-align: center;
    padding: 0.5rem 0.3rem;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    transition: var(--transition);
    min-width: 0;
}
.sci-cal-day.today {
    border-color: var(--c-primary);
    background: var(--c-primary-bg);
    box-shadow: 0 0 0 1px var(--c-primary);
}
.sci-cal-day.has-items {
    border-color: #AF52DE;
    background: #FAF0FF;
}
.sci-cal-day-name {
    font-size: var(--fs-micro);
    font-weight: 600;
    color: var(--c-text3);
    margin-bottom: 0.15rem;
}
.sci-cal-day-num {
    font-size: var(--fs-body);
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 0.2rem;
}
.sci-cal-day.today .sci-cal-day-num {
    color: var(--c-primary);
}
.sci-cal-dots {
    display: flex;
    justify-content: center;
    gap: 0.2rem;
    min-height: 18px;
    align-items: center;
}
.sci-cal-dot {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: var(--r-full);
    font-size: 0.6rem;
    font-weight: 700;
    color: white;
}
.sci-cal-dot.pending {
    background: var(--c-warn);
}
.sci-cal-dot.confirmed {
    background: var(--c-success);
}

/* ── 캘린더 범례 ── */
.sci-calendar-legend {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    padding: 0.3rem 0;
}
.sci-cal-legend-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: var(--fs-micro);
    font-weight: 500;
    color: var(--c-text2);
}

/* ── 빈 상태 ── */
.sci-prep-empty {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--c-text3);
    font-size: var(--fs-body);
}
.sci-prep-empty p {
    margin-top: 0.5rem;
}

/* ── 최근 확인 리스트 ── */
.sci-recent-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.sci-recent-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.7rem;
    background: var(--c-success-bg);
    border-radius: var(--r-sm);
    border-left: 3px solid var(--c-success);
}
.sci-recent-check {
    font-size: 1rem;
    flex-shrink: 0;
}
.sci-recent-info {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}
.sci-recent-name {
    font-size: var(--fs-caption);
    font-weight: 600;
    color: var(--c-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sci-recent-date {
    font-size: var(--fs-micro);
    color: var(--c-text3);
}

/* 선생님 대시보드 - 내 과학 신청 위젯 */
.sci-my-requests {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.sci-my-request-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0.8rem;
    background: var(--c-bg);
    border-radius: var(--r-sm);
}
.sci-my-request-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}
.sci-my-request-exp {
    font-size: var(--fs-caption);
    font-weight: 500;
    color: var(--c-text);
}
.sci-my-request-date {
    font-size: var(--fs-micro);
    color: var(--c-text3);
}

/* ═══ Requests Table ═══ */
.requests-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background: var(--c-card);
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
}

.requests-table th,
.requests-table td {
    padding: 0.85rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--c-border-light);
    font-size: var(--fs-caption);
}

.requests-table th {
    background: var(--c-bg);
    color: var(--c-text2);
    font-weight: 700;
    font-size: var(--fs-micro);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--c-border);
}

.requests-table tbody tr:hover { background: var(--c-bg); }

/* ═══ Status Badges ═══ */
.status-badge {
    padding: 3px 8px;
    border-radius: var(--r-full);
    font-size: var(--fs-micro);
    font-weight: 700;
}

.status-pending  { background: var(--c-danger-bg); color: var(--c-danger); }
.status-approved { background: var(--c-success-bg); color: var(--c-success); }
.status-rejected { background: #F3E5F5; color: #7B1FA2; }

.action-btn {
    padding: 3px 8px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--fs-micro);
    font-weight: 600;
    font-family: inherit;
    margin: 0 2px;
    transition: all var(--transition);
    box-shadow: none;
}

.approve-btn { background: var(--c-success); color: white; }
.reject-btn  { background: var(--c-danger); color: white; }
.approve-btn:hover, .reject-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ═══ Dashboard Table (Week View) ═══ */
.reservation-table-container { max-width: 100%; margin-top: 0.4rem; }

.weeks-wrapper {
    display: flex;
    gap: 0.6rem;
    justify-content: space-between;
}

.week-section { flex: 1; min-width: 0; }

.week-header {
    background: var(--c-primary);
    color: white;
    padding: 0.4rem;
    border-radius: var(--r-sm) var(--r-sm) 0 0;
    font-weight: 700;
    font-size: var(--fs-caption);
    text-align: center;
}

.period-header, .day-header {
    background: var(--c-bg);
    font-weight: 600;
    color: var(--c-text2);
    padding: 0.4rem 0.3rem;
}

.period-header {
    width: 70px; min-width: 70px; max-width: 70px;
    background: var(--c-bg);
    font-size: var(--fs-caption);
}

.day-header {
    width: calc((100% - 70px) / 5);
    font-size: var(--fs-caption);
}

.day-header small {
    font-size: var(--fs-micro);
    color: var(--c-text3);
    font-weight: 400;
    display: block;
    line-height: 1.2;
    margin-top: 0.1rem;
}

.period-label {
    background: var(--c-bg);
    font-weight: 500;
    color: var(--c-text2);
    padding: 0.3rem;
    width: 60px;
    font-size: var(--fs-micro);
}

.usage-guide {
    color: var(--c-text2);
    font-size: var(--fs-micro);
    text-align: center;
    margin: 0.2rem 0;
    line-height: 1.4;
    font-weight: 500;
}

.no-res {
    color: var(--c-text3);
    font-size: 0.65rem;
}

/* ═══ Board ═══ */
.board-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0.5rem;
}

.board-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.board-title {
    font-size: var(--fs-title);
    font-weight: 700;
    color: var(--c-text);
}

.board-write-btn {
    background: var(--c-primary);
    color: white;
    border: none;
    border-radius: var(--r-sm);
    padding: 0.5rem 1rem;
    font-size: var(--fs-body);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
}
.board-write-btn:hover { background: var(--c-primary-hover); }

.board-list {
    background: var(--c-card);
    border-radius: var(--r-md);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
}

.board-item {
    display: grid;
    grid-template-columns: 40px 1fr 80px 72px;
    align-items: center;
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid var(--c-border-light);
    cursor: pointer;
    transition: background 0.12s;
    gap: 0.4rem;
}
.board-item:last-child { border-bottom: none; }
.board-item:hover { background: var(--c-primary-bg); }

.board-item-num {
    color: var(--c-text3);
    font-size: var(--fs-caption);
    text-align: center;
}

.board-item-title {
    font-weight: 600;
    color: var(--c-text);
    font-size: var(--fs-body);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.board-new-badge {
    background: var(--c-danger);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    margin-left: 0.3rem;
    vertical-align: middle;
}

.board-attach-icon {
    margin-left: 0.2rem;
    font-size: 0.8rem;
}

.board-item-author {
    color: var(--c-text2);
    font-size: var(--fs-micro);
    text-align: center;
    white-space: nowrap;
}

.board-item-date {
    color: var(--c-text3);
    font-size: var(--fs-micro);
    text-align: right;
}

.board-empty {
    background: var(--c-card);
    border-radius: var(--r-md);
    padding: 3rem;
    text-align: center;
    color: var(--c-text2);
    font-size: var(--fs-body);
    line-height: 2;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
}

.board-detail {
    background: var(--c-card);
    border-radius: var(--r-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
}

.board-detail-header {
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 0.85rem;
    margin-bottom: 1rem;
}

.board-detail-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 0.4rem;
}

.board-detail-meta {
    display: flex;
    gap: 1rem;
    color: var(--c-text2);
    font-size: var(--fs-caption);
}

.board-detail-body {
    color: var(--c-text);
    font-size: var(--fs-body);
    line-height: 1.85;
    min-height: 80px;
    white-space: pre-wrap;
    word-break: break-word;
}

.board-detail-link {
    margin-top: 1rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--c-border-light);
}

.board-drive-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--c-success);
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--r-sm);
    font-size: var(--fs-caption);
    font-weight: 600;
    transition: background 0.15s;
}
.board-drive-btn:hover { background: #2DA74D; }

.board-detail-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.25rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--c-border-light);
}

.board-back-btn {
    background: var(--c-bg);
    color: var(--c-text2);
    border: none;
    border-radius: var(--r-sm);
    padding: 0.5rem 1rem;
    font-size: var(--fs-caption);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.board-back-btn:hover { background: var(--c-border); }

.board-delete-btn {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    border: none;
    border-radius: var(--r-sm);
    padding: 0.5rem 1rem;
    font-size: var(--fs-caption);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.board-delete-btn:hover { background: #FFD5D5; }

.board-form {
    background: var(--c-card);
    border-radius: var(--r-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--c-border);
}

.board-form-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 1.25rem;
}

.board-form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    margin-top: 0.85rem;
}

.board-submit-btn {
    background: var(--c-primary);
    color: white;
    border: none;
    border-radius: var(--r-sm);
    padding: 0.55rem 1.2rem;
    font-size: var(--fs-body);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}
.board-submit-btn:hover { background: var(--c-primary-hover); }

/* ═══ Usage Stats ═══ */
.usage-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.usage-stat-card {
    background: var(--c-card);
    border-radius: var(--r-md);
    padding: 1rem;
    border: 1px solid var(--c-border);
    box-shadow: var(--shadow-xs);
    transition: transform var(--transition);
}

.usage-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.usage-stat-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.6rem;
}

.usage-stat-icon { font-size: 1.1rem; }

.usage-stat-name {
    font-weight: 700;
    font-size: var(--fs-body);
    color: var(--c-text);
}

.usage-bar-container {
    width: 100%;
    height: 6px;
    background: var(--c-bg);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.4rem;
}

.usage-bar {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s ease-out;
    min-width: 2px;
}

.usage-stat-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--fs-micro);
    color: var(--c-text2);
}

.usage-percentage {
    font-weight: 700;
    font-size: var(--fs-caption);
}

/* ═══ Dashboard (Teacher) ═══ */
.dashboard-container {
    max-width: 760px;
    margin: 0 auto;
    padding: 0.5rem 0;
}

.dashboard-greeting {
    font-size: var(--fs-title);
    font-weight: 700;
    color: var(--c-text);
    margin: 0 0 0.15rem 0;
}

.dashboard-sub {
    font-size: var(--fs-caption);
    color: var(--c-text3);
    margin: 0 0 1rem 0;
}

.dash-section-title {
    font-size: var(--fs-headline);
    font-weight: 700;
    color: var(--c-text);
    margin: 1.25rem 0 0.6rem 0;
}

/* ── Today Hero Card ── */
.today-hero {
    background: linear-gradient(145deg, #007AFF, #5AC8FA);
    border-radius: var(--r-lg);
    padding: 1.1rem 1.2rem;
    margin-bottom: 1rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.today-hero::after {
    content: '';
    position: absolute;
    top: -30px; right: -30px;
    width: 100px; height: 100px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.today-hero-label {
    font-size: var(--fs-micro);
    font-weight: 600;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

.today-hero-content {
    font-size: var(--fs-body);
    font-weight: 600;
    line-height: 1.5;
}

.today-hero-empty {
    font-size: var(--fs-body);
    opacity: 0.8;
}

/* ── Quick Action Grid ── */
.quick-action-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.quick-action-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    padding: 0.75rem 0.4rem;
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.quick-action-item:hover {
    border-color: var(--c-primary);
    background: var(--c-primary-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.quick-action-item:active {
    transform: scale(0.97);
}

.quick-action-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.quick-action-label {
    font-size: var(--fs-micro);
    font-weight: 600;
    color: var(--c-text2);
}

/* ── Dash Cards ── */
.dash-card {
    background: var(--c-card);
    border-radius: var(--r-md);
    border: 1px solid var(--c-border);
    padding: 0.85rem;
    transition: all var(--transition);
}

.dash-card:hover {
    box-shadow: var(--shadow-sm);
}

.dash-card-icon {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.dash-card-title {
    font-size: var(--fs-body);
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 0.2rem;
}

.dash-card-desc {
    font-size: var(--fs-caption);
    color: var(--c-text2);
    line-height: 1.5;
}

.dash-reservation-card {
    margin-bottom: 1rem;
    background: var(--c-bg);
    border-color: var(--c-border);
}

.dash-reservation-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--c-border-light);
    font-size: var(--fs-caption);
}

.dash-reservation-item:last-child { border-bottom: none; }

.dash-res-facility { font-weight: 600; color: var(--c-primary); }
.dash-res-date { color: var(--c-text2); }

/* ── Info Grid ── */
.dash-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.info-card { cursor: pointer; }

.info-card:hover {
    transform: translateY(-2px);
    border-color: var(--c-primary);
}

.tip-card { background: var(--c-bg); }

/* ── Collapsible Sections ── */
.dash-section { margin-bottom: 0.5rem; }

.dash-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0;
    cursor: pointer;
    user-select: none;
}

.dash-section-header h3 {
    font-size: var(--fs-body);
    font-weight: 700;
    color: var(--c-text);
    margin: 0;
}

.dash-chevron {
    font-size: var(--fs-caption);
    color: var(--c-text3);
    transition: transform 0.2s;
    line-height: 1;
}

.dash-section.collapsed .dash-chevron {
    transform: rotate(-90deg);
}

.dash-section-body {
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.2s;
    max-height: 800px;
    opacity: 1;
}

.dash-section.collapsed .dash-section-body {
    max-height: 0;
    opacity: 0;
    padding: 0;
}

/* ── Dashboard Compact Schedule ── */
.dash-schedule { font-size: var(--fs-micro); }

.dash-schedule th.period-header,
.dash-schedule th.day-header {
    padding: 3px 3px;
    font-size: 0.65rem;
}

.dash-schedule th.period-label {
    padding: 2px 3px;
    font-size: 0.65rem;
}

.dash-schedule td { padding: 1px; }

/* ═══ Transfer Card ═══ */
.transfer-card {
    margin: 0.75rem 0;
    background: var(--c-warn-bg);
    border-color: #FFD480;
}

.transfer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.35rem;
}

.transfer-row {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.3rem 0.4rem;
    background: var(--c-card);
    border-radius: var(--r-sm);
    border: 1px solid #FFD480;
    font-size: var(--fs-caption);
    flex-wrap: nowrap;
}

.transfer-grade { font-weight: 700; color: #92400E; min-width: 38px; }
.transfer-arrow { color: var(--c-warn); font-weight: 700; }
.transfer-class { font-weight: 700; color: var(--c-warn); }
.transfer-count { font-size: var(--fs-micro); color: var(--c-text3); }

.transfer-in-btn, .transfer-out-btn {
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: var(--fs-micro);
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    margin-left: auto;
    box-shadow: none;
    width: auto;
    min-width: 0;
}
.transfer-in-btn {
    background: var(--c-success-bg);
    color: var(--c-success);
    border: 1px solid #A5D6A7;
}
.transfer-in-btn:hover {
    background: var(--c-success);
    color: #fff;
    transform: none;
    box-shadow: none;
}
.transfer-out-btn {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    border: 1px solid #FFB3B3;
    margin-left: 0.2rem;
}
.transfer-out-btn:hover {
    background: var(--c-danger);
    color: #fff;
    transform: none;
    box-shadow: none;
}

.transfer-edit-btn {
    margin-top: 0.5rem;
    background: none;
    border: 1px solid var(--c-warn);
    color: var(--c-warn);
    padding: 0.25rem 0.7rem;
    border-radius: 6px;
    font-size: var(--fs-micro);
    cursor: pointer;
    transition: background 0.15s;
    font-family: inherit;
}
.transfer-edit-btn:hover { background: var(--c-warn-bg); }

/* 전학 이력 */
.transfer-history-list {
    margin-top: 0.3rem;
}
.transfer-history-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.5rem;
    font-size: var(--fs-caption);
    border-bottom: 1px solid var(--c-border-light);
}
.transfer-history-item:last-child { border-bottom: none; }

.transfer-history-grade {
    margin-bottom: 0.6rem;
}
.transfer-history-grade:last-child { margin-bottom: 0; }

.transfer-history-grade-title {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--c-primary);
    padding: 0.3rem 0.5rem;
    background: var(--c-bg2);
    border-radius: 6px;
    margin-bottom: 0.2rem;
}

/* ═══ 오늘의 전학 (Today Transfer) ═══ */
.today-transfer-card {
    border: 1.5px solid var(--c-primary);
    background: linear-gradient(135deg, rgba(0,122,255,0.02), rgba(0,122,255,0.06));
}

.today-transfer-input-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}

.transfer-name-input {
    flex: 1;
    min-width: 0;
    padding: 0.6rem 0.8rem;
    border: 1.5px solid var(--c-border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--c-bg);
    color: var(--c-text);
    transition: border-color 0.2s;
}
.transfer-name-input:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(0,122,255,0.1);
}
.transfer-name-input.shake {
    animation: inputShake 0.4s;
    border-color: var(--c-danger);
}
@keyframes inputShake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

.transfer-grade-btns {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}
.transfer-grade-btn {
    flex: 1;
    min-width: 0;
    padding: 0.5rem 0;
    border: 1.5px solid var(--c-primary);
    border-radius: 10px;
    background: #fff;
    color: var(--c-primary);
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s;
}
.transfer-grade-btn:active {
    background: var(--c-primary);
    color: #fff;
    transform: scale(0.92);
}
.transfer-grade-btn.out {
    width: auto;
    padding: 0 0.6rem;
    height: 32px;
    font-size: 0.78rem;
    border-color: var(--c-danger);
    color: var(--c-danger);
}
.transfer-grade-btn.out:active {
    background: var(--c-danger);
    color: #fff;
}

/* 오늘의 전입 결과 리스트 */
.today-transfer-list { margin-top: 0.3rem; }

.today-transfer-empty {
    text-align: center;
    color: var(--c-text3);
    font-size: 0.8rem;
    padding: 0.8rem 0;
    margin: 0;
}

.today-transfer-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.5rem;
    border-bottom: 1px solid var(--c-border-light);
    font-size: 0.85rem;
    animation: fadeSlideIn 0.25s ease-out;
}
.today-transfer-item:last-child { border-bottom: none; }

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.today-transfer-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--c-primary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.today-transfer-name {
    font-weight: 600;
    color: var(--c-text);
}
.today-transfer-arrow {
    color: var(--c-text3);
    font-size: 0.8rem;
}
.today-transfer-assign {
    font-weight: 700;
    color: var(--c-primary);
}
.today-transfer-count {
    font-size: 0.75rem;
    color: var(--c-text3);
    margin-left: auto;
}

/* ═══ Student Count Editor ═══ */
.sc-add-btn, .sc-del-btn {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: 1px solid var(--c-border);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.sc-add-btn {
    background: var(--c-success-bg);
    color: var(--c-success);
    border-color: #A5D6A7;
}
.sc-add-btn:hover { background: #D4EDDA; }

.sc-del-btn {
    background: var(--c-danger-bg);
    color: var(--c-danger);
    border-color: #FFB3B3;
}
.sc-del-btn:hover { background: #FFD5D5; }

/* ═══ Schedule Timetable (시정표) ═══ */
.schedule-timetable {
    width: 100%;
    border-collapse: collapse;
    margin-top: 0.3rem;
    font-size: 0.66rem;
}

.schedule-timetable th,
.schedule-timetable td {
    border: 1px solid var(--c-border);
    padding: 0.15rem 0.2rem;
    text-align: center;
}

.schedule-timetable thead th {
    background: var(--c-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.66rem;
}

.schedule-timetable thead th:first-child {
    background: var(--c-primary-hover);
}

.schedule-timetable tbody td:first-child {
    background: var(--c-primary-bg);
    font-weight: 600;
    color: var(--c-primary);
    white-space: nowrap;
}

.schedule-timetable tbody tr:nth-child(even) {
    background: var(--c-bg);
}

.schedule-timetable .lunch-row-low td {
    background: #FFFBEB;
}
.schedule-timetable .lunch-row-low td:first-child {
    background: #FEF08A;
    color: #92400E;
}

.schedule-timetable .lunch-row-high td {
    background: #FFFBEB;
}
.schedule-timetable .lunch-row-high td:first-child {
    background: #FEF08A;
    color: #92400E;
}

.schedule-timetable .dim { color: var(--c-text3); }

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
    .container { padding: 0.75rem 0.5rem; }

    header {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
        padding: 0.75rem 1rem;
    }

    header h1 { font-size: 1rem; }
    main { padding: 0; }

    .menu-grid, .admin-menu-grid, .dashboard-stats {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .login-form { margin: 0.5rem auto; max-width: 100%; }
    .login-body { padding: 1.25rem; }

    .stat-item span { font-size: 1.8rem; }

    .requests-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .modal-actions { flex-direction: column; }
    .modal-btn { width: 100%; }

    .facility-tabs { flex-direction: column; gap: 0.4rem; }

    .weeks-wrapper { flex-direction: column; gap: 0.4rem; }

    .weekly-schedule-table th.period-header {
        width: 46px; min-width: 46px; max-width: 46px;
        font-size: 0.6rem;
    }

    .weekly-schedule-table th:not(.period-header) {
        width: calc((100% - 46px) / 5);
        font-size: 0.65rem;
    }

    .schedule-cell { font-size: 0.63rem; min-height: 44px; }

    .reservation-widget { padding: 0.75rem; }

    .has-reservation-item, .no-reservation {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.15rem;
    }

    .quick-action-grid { grid-template-columns: repeat(3, 1fr); gap: 0.35rem; }
    .quick-action-item { padding: 0.6rem 0.3rem; }
    .quick-action-icon { font-size: 1.2rem; }
    .quick-action-label { font-size: 0.65rem; }

    .content-area { padding: 1rem; }
}

@media (max-width: 480px) {
    header h1 { font-size: 0.9rem; }

    .grade-buttons, .class-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .grade-btn, .class-btn {
        padding: 0.6rem;
        font-size: var(--fs-body);
        min-height: 44px;
    }

    .schedule-legend { flex-direction: column; align-items: center; }

    .weekly-schedule-table th.period-header {
        width: 38px; min-width: 38px; max-width: 38px;
    }

    .schedule-cell { font-size: 0.58rem; min-height: 40px; }
}

@media (max-width: 600px) {
    .transfer-grid { grid-template-columns: repeat(2, 1fr); }
    .dash-info-grid { grid-template-columns: 1fr; }
    .dashboard-greeting { font-size: 1.15rem; }
    .schedule-timetable { font-size: 0.66rem; }
}

@media (max-width: 768px) {
    .usage-stats-grid { grid-template-columns: 1fr 1fr; gap: 0.5rem; }
    .usage-stat-card { padding: 0.75rem; }
}

@media (max-width: 480px) {
    .usage-stats-grid { grid-template-columns: 1fr; }
}

/* ═══ Animations ═══ */
@keyframes shimmer {
    0%   { background-position: -200px 0; }
    100% { background-position: 200px 0; }
}

.skeleton {
    background: linear-gradient(90deg, var(--c-bg) 25%, #E8E8ED 37%, var(--c-bg) 63%);
    background-size: 400px 100%;
    animation: shimmer 1.4s ease-in-out infinite;
    border-radius: var(--r-sm);
}

@keyframes checkPop {
    0%   { transform: scale(0); opacity: 0; }
    50%  { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.check-animation {
    animation: checkPop 0.3s ease-out forwards;
}