/* ========================================
   Break Tracker - CSS Styles
   Paper Cutout Theme (matching Daily Champion)
   ======================================== */

/* Ensure hidden attribute works */
[hidden] {
    display: none !important;
}

/* CSS Variables - Paper Cutout Theme */
:root {
    --primary-color: #E17055;
    --primary-dark: #D35E45;
    --primary-light: #F08A74;
    --secondary-color: #27AE60;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --success-color: #27AE60;
    
    /* Break-specific colors */
    --toilet-color: #8B5CF6;
    --toilet-hover: #7C3AED;
    --drink-color: #06B6D4;
    --drink-hover: #0891B2;
    
    /* Paper Cutout Colors */
    --paper-bg: #FAFAF8;
    --paper-card: #FFFFFF;
    --paper-outline: #2D3436;
    --paper-shadow: #D0D0D0;
    --paper-accent-yellow: #FFEAA7;
    --paper-accent-pink: #FFD6D6;
    --paper-accent-green: #D4EDDA;
    --paper-accent-blue: #D6E9FF;
    --paper-accent-purple: #EDE9FE;
    --paper-accent-cyan: #CFFAFE;
    
    --bg-primary: var(--paper-bg);
    --bg-secondary: var(--paper-card);
    --bg-tertiary: #F0F0F0;
    --bg-card: var(--paper-card);
    
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-muted: #95A5A6;
    
    --border-color: var(--paper-outline);
    --border-radius: 14px;
    --border-radius-lg: 20px;
    --border-radius-sm: 10px;
    
    --shadow-sm: 2px 2px 0 var(--paper-shadow);
    --shadow-md: 3px 3px 0 var(--paper-shadow);
    --shadow-lg: 4px 4px 0 var(--paper-shadow);
    
    --header-height: 60px;
    --font-family: 'Inter', 'Fredoka', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ========================================
   Header - Paper Cutout Style
   ======================================== */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 16px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    margin: 12px;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 22px;
    font-weight: 300;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
    position: relative;
    left: 0;
}

.app-header h1 .accent {
    font-weight: 700;
    color: var(--primary-color, #E17055);
}

.back-btn {
    display: none;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.icon-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0 var(--paper-shadow);
    background: var(--paper-accent-yellow);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

.dashboard-link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.dashboard-link-btn:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0 var(--paper-shadow);
    background: var(--paper-accent-blue);
    color: var(--text-primary);
}

.dashboard-link-btn svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   Buttons - Paper Cutout Style
   ======================================== */
.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.btn-ghost:hover {
    transform: translateY(-1px);
    box-shadow: 3px 3px 0 var(--paper-shadow);
    background: var(--paper-accent-yellow);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--primary-color);
    border: 2px solid var(--paper-outline);
    color: white;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 3px 3px 0 var(--paper-shadow);
}

/* ========================================
   Screens
   ======================================== */
.screen {
    padding: 16px;
    max-width: 1200px;
    margin: 0 auto;
}

/* ========================================
   Class Selection Screen
   ======================================== */
.selection-container {
    max-width: 600px;
    margin: 1rem auto;
    text-align: center;
}

.selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.class-section {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-md);
}

.class-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-align: left;
}

.class-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 1rem;
}

.class-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.class-item:hover {
    transform: translate(-2px, -2px);
    box-shadow: 4px 4px 0 var(--paper-shadow);
    background: var(--paper-accent-yellow);
}

.class-item-name {
    font-weight: 600;
    color: var(--text-primary);
}

.class-item-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.class-item-actions {
    display: flex;
    gap: 0.5rem;
}

.class-item-actions button {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.create-class-btn {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
}

.manage-classes-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
    padding: 1rem;
    margin-top: 0.5rem;
}

.manage-classes-hint a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.manage-classes-hint a:hover {
    text-decoration: underline;
}

.no-classes-message {
    color: var(--text-secondary);
    font-style: italic;
    padding: 1rem;
}

/* ========================================
   Student Grid Screen
   ======================================== */
.class-header {
    margin-bottom: 1rem;
}

.class-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.current-class-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.current-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    padding: 4px 12px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.time-period-badge {
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    border: 2px solid var(--paper-outline);
    box-shadow: var(--shadow-sm);
}

.time-period-badge.morning {
    background: var(--paper-accent-yellow);
    color: var(--text-primary);
}

.time-period-badge.afternoon {
    background: var(--paper-accent-blue);
    color: var(--text-primary);
}

/* ========================================
   Today's Activity Log Panel
   ======================================== */
.today-log-panel {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    margin-top: 1rem;
    box-shadow: var(--shadow-md);
}

.today-log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    list-style: none;
}

.today-log-header::-webkit-details-marker {
    display: none;
}

.today-log-header::before {
    content: '▶';
    font-size: 0.7rem;
    margin-right: 0.5rem;
    transition: transform 0.2s ease;
}

.today-log-panel[open] .today-log-header::before {
    transform: rotate(90deg);
}

.log-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--paper-accent-yellow);
    border: 2px solid var(--paper-outline);
    padding: 2px 10px;
    border-radius: 20px;
}

.today-log-content {
    padding: 0 16px 16px;
    max-height: 200px;
    overflow-y: auto;
}

.log-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    margin-bottom: 6px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.log-entry-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.log-entry-time {
    color: var(--text-secondary);
    font-size: 0.8rem;
    min-width: 50px;
}

.log-entry-name {
    font-weight: 600;
}

.log-entry-type {
    font-size: 0.85rem;
}

.log-entry-delete {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    color: var(--text-primary);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 0.9rem;
    line-height: 1;
    border-radius: 6px;
    transition: all 0.15s;
}

.log-entry-delete:hover {
    color: white;
    background: var(--danger-color);
}

.no-log-message {
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    padding: 1rem;
}

.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.student-card {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    padding: 16px 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
    box-shadow: var(--shadow-md);
}

.student-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--paper-shadow);
}

.student-card:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-md);
}

/* Card flash animations for success feedback */
.student-card.flash-toilet {
    animation: flashToilet 0.6s ease-out;
}

.student-card.flash-drink {
    animation: flashDrink 0.6s ease-out;
}

@keyframes flashToilet {
    0% { background: var(--paper-card); }
    30% { background: var(--paper-accent-purple); border-color: var(--toilet-color); box-shadow: 0 0 20px rgba(139, 92, 246, 0.4); }
    100% { background: var(--paper-card); }
}

@keyframes flashDrink {
    0% { background: var(--paper-card); }
    30% { background: var(--paper-accent-cyan); border-color: var(--drink-color); box-shadow: 0 0 20px rgba(6, 182, 212, 0.4); }
    100% { background: var(--paper-card); }
}

.student-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-word;
}

.student-stats {
    display: flex;
    justify-content: center;
    gap: 12px;
    font-size: 0.85rem;
}

.stat {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
}

.stat-toilet {
    color: var(--toilet-color);
    background: var(--paper-accent-purple);
}

.stat-drink {
    color: var(--drink-color);
    background: var(--paper-accent-cyan);
}

/* ========================================
   Break Type Modal
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    max-width: 90%;
    width: 400px;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.break-modal {
    text-align: center;
    width: 340px;
}

.break-modal h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.break-prompt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.break-options {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.break-btn {
    flex: 1;
    padding: 20px 16px;
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-md);
}

.break-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--paper-shadow);
}

.break-btn:active {
    transform: translate(0, 0);
    box-shadow: var(--shadow-md);
}

.toilet-btn {
    background: var(--toilet-color);
    color: white;
}

.toilet-btn:hover {
    background: var(--toilet-hover);
}

.drink-btn {
    background: var(--drink-color);
    color: white;
}

.drink-btn:hover {
    background: var(--drink-hover);
}

.break-icon {
    font-size: 2rem;
}

.break-label {
    font-size: 1rem;
    font-weight: 700;
}

.cancel-btn {
    width: 100%;
    margin-top: 8px;
}

/* ========================================
   Create Class Modal
   ======================================== */
.create-class-modal {
    width: 450px;
}

.create-class-modal h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 1rem;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.text-input,
.textarea-input,
.select-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--paper-card);
    color: var(--text-primary);
    transition: all 0.15s;
}

.text-input:focus,
.textarea-input:focus,
.select-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(225, 112, 85, 0.2);
}

.textarea-input {
    resize: vertical;
    min-height: 150px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 20px;
}

/* ========================================
   History Screen
   ======================================== */
.history-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 1rem;
}

.history-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.history-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.history-controls label {
    font-weight: 600;
    color: var(--text-primary);
}

.history-controls .select-input {
    width: auto;
    min-width: 150px;
}

.history-content {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.history-day {
    margin-bottom: 24px;
}

.history-day:last-child {
    margin-bottom: 0;
}

.history-day-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--paper-outline);
}

.history-table {
    width: 100%;
    border-collapse: collapse;
}

.history-table th,
.history-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px dashed #E0E0E0;
}

.history-table th {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    background: var(--paper-accent-yellow);
}

.history-table tr:last-child td {
    border-bottom: none;
}

.type-toilet {
    color: var(--toilet-color);
    font-weight: 600;
}

.type-drink {
    color: var(--drink-color);
    font-weight: 600;
}

.no-history-message {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
}

/* ========================================
   Print Modal
   ======================================== */
.print-modal {
    width: 400px;
}

.print-modal h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

/* ========================================
   Print Preview
   ======================================== */
.print-preview {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: var(--bg-primary);
    overflow: auto;
}

.print-preview-header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    margin: 12px;
    box-shadow: var(--shadow-md);
}

.print-preview-content {
    max-width: 800px;
    margin: 16px auto;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.print-report-header {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--paper-outline);
}

.print-report-header h1 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.print-report-header p {
    color: var(--text-secondary);
}

.print-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.summary-card {
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.summary-card .value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.summary-card .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.summary-card.toilet .value {
    color: var(--toilet-color);
}

.summary-card.drink .value {
    color: var(--drink-color);
}

.print-section {
    margin-bottom: 20px;
}

.print-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

/* ========================================
   Toast Notification
   ======================================== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--paper-outline);
    color: white;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease-out;
    z-index: 2000;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 2px solid var(--paper-outline);
}

.toast-undo-btn {
    background: var(--primary-color);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
}

.toast-undo-btn:hover {
    background: #d45a3c;
    transform: translateY(-1px);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.toast.hiding {
    animation: toastOut 0.3s ease-out forwards;
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    body {
        background: white;
    }

    .print-preview-header {
        display: none;
    }

    .print-preview-content {
        margin: 0;
        padding: 0;
        box-shadow: none;
        max-width: 100%;
    }

    .print-report-header {
        margin-bottom: 1rem;
    }
}

/* ========================================
   Export Modal
   ======================================== */
.export-modal {
    width: 400px;
}

.export-modal h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.export-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ========================================
   Auth UI Styles
   ======================================== */
.auth-btn {
    position: relative;
}

.auth-btn.logged-in {
    color: var(--secondary-color);
}

.auth-btn.logged-in::after {
    content: '';
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    border: 2px solid var(--paper-card);
}

.auth-dropdown {
    position: fixed;
    background: var(--paper-card);
    border: 2px solid var(--paper-outline);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    min-width: 200px;
    padding: 12px;
}

.auth-dropdown.hidden {
    display: none;
}

.auth-dropdown-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.auth-user-email {
    font-size: 0.85rem;
    color: var(--text-secondary);
    word-break: break-all;
    padding: 4px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 4px;
}

.auth-prompt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 4px;
}

.auth-modal-content {
    max-width: 400px;
    padding: 24px;
}

.auth-modal-content h3 {
    margin-bottom: 16px;
    text-align: center;
}

.auth-error {
    background: #FEE2E2;
    color: #DC2626;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.auth-success {
    background: #D1FAE5;
    color: #059669;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.auth-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
    text-align: center;
}

.auth-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 4px;
}

.auth-link:hover {
    text-decoration: underline;
}

.auth-info {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.full-width {
    width: 100%;
}

.login-prompt {
    text-align: center;
    padding: 32px 20px;
    background: var(--paper-accent-blue);
    border: 2px dashed var(--paper-outline);
    border-radius: var(--border-radius);
}

.login-prompt p {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.login-prompt .btn-primary {
    margin-top: 8px;
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 640px) {
    .app-header {
        padding: 12px 16px;
    }

    .app-header h1 {
        font-size: 1.1rem;
    }

    .student-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 10px;
    }

    .student-card {
        padding: 12px;
    }

    .student-name {
        font-size: 0.85rem;
    }

    .break-options {
        flex-direction: column;
    }

    .history-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .history-controls .select-input {
        width: 100%;
    }
}