/* Bay Area Cheder Substitute Tracking System - Styles */

/* Import Professional Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    /* Refined Color Palette */
    --primary-color: #1e40af;
    --primary-light: #3b82f6;
    --primary-dark: #1e3a8a;
    --secondary-color: #475569;
    --success-color: #059669;
    --danger-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #0891b2;

    /* Neutral Colors */
    --bg-color: #f8fafc;
    --bg-secondary: #f1f5f9;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    /* Enhanced Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 15px;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Authentication Pages */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #60a5fa 100%);
    position: relative;
    overflow: hidden;
}

.auth-page::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.auth-container {
    width: 100%;
    max-width: 460px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.auth-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header img.logo {
    max-width: 200px;
    height: auto;
    margin: 0 auto 20px;
    display: block;
}

.auth-header h1 {
    color: var(--primary-color);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.auth-header h2 {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
}

.auth-form h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.auth-toggle {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.auth-toggle a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-toggle a:hover {
    text-decoration: underline;
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-brand img.logo {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.nav-brand h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    margin: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-user {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

/* Dashboard Stats */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--primary-color);
    opacity: 0.03;
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card h3 {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -1px;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 12px;
}

.form-error {
    color: var(--danger-color);
    font-size: 14px;
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 6px;
    display: none;
}

.form-error.show {
    display: block;
}

.form-success {
    color: var(--success-color);
    font-size: 14px;
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 6px;
    display: none;
}

.form-success.show {
    display: block;
}

/* Buttons */
.btn {
    padding: 11px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    line-height: 1.5;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.btn:hover::before {
    transform: translateX(0);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 4px rgba(30, 64, 175, 0.2);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 8px rgba(30, 64, 175, 0.3);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    box-shadow: 0 2px 4px rgba(71, 85, 105, 0.2);
}

.btn-secondary:hover {
    background: #334155;
    box-shadow: 0 4px 8px rgba(71, 85, 105, 0.3);
}

.btn-success {
    background: var(--success-color);
    color: white;
    box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
}

.btn-success:hover {
    background: #047857;
    box-shadow: 0 4px 8px rgba(5, 150, 105, 0.3);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    box-shadow: 0 2px 4px rgba(220, 38, 38, 0.2);
}

.btn-danger:hover {
    background: #b91c1c;
    box-shadow: 0 4px 8px rgba(220, 38, 38, 0.3);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: 7px 16px;
    font-size: 13px;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
    line-height: 1;
}

.badge-admin {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(220, 38, 38, 0.2);
}

.badge-substitute {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(30, 64, 175, 0.2);
}

.badge-paid {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
}

.badge-unpaid {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(217, 119, 6, 0.2);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-light);
    overflow-x: auto;
}

.tab-btn {
    padding: 14px 28px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: -2px;
    transition: all 0.2s ease;
    white-space: nowrap;
    position: relative;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

.tab-btn:hover {
    color: var(--primary-color);
    background: var(--bg-color);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    transform: scaleX(1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
}

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

table thead {
    background: var(--bg-secondary);
}

table th {
    text-align: left;
    padding: 16px 20px;
    font-weight: 700;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    white-space: nowrap;
}

table td {
    padding: 16px 20px;
    border-top: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 14px;
}

table tbody tr {
    transition: all 0.2s ease;
}

table tbody tr:hover {
    background: var(--bg-color);
    transform: scale(1.001);
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 24px;
    color: var(--text-primary);
}

/* Filters */
.filters {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.filters input,
.filters select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
}

.close:hover {
    color: var(--text-primary);
}

/* Report Results */
.report-results {
    margin-top: 30px;
}

.report-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: var(--shadow);
}

.report-card h4 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.report-stat {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.report-stat:last-child {
    border-bottom: none;
}

/* Substitute Details Modal */
.details-section {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.details-section:last-child {
    border-bottom: none;
}

.details-section h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 16px;
}

.details-section p {
    margin: 8px 0;
    color: var(--text-secondary);
}

.details-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.detail-stat {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.detail-stat .label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-stat .value {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
}

/* Clickable substitute names */
.clickable-name {
    color: var(--primary-color);
    cursor: pointer;
    text-decoration: underline;
    transition: color 0.2s;
}

.clickable-name:hover {
    color: var(--primary-dark);
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-stats {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .filters {
        width: 100%;
    }

    .filters input,
    .filters select {
        flex: 1;
    }

    .tabs {
        overflow-x: auto;
    }

    table {
        font-size: 12px;
    }

    table th,
    table td {
        padding: 10px;
    }
}