/* ============================================
   SCHOOL DAYBOOK - Premium Design System
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- CSS Variables ---------- */
:root {
    /* Primary Palette */
    --primary-50: #eef2ff;
    --primary-100: #dbe4ff;
    --primary-200: #bac8ff;
    --primary-300: #91a7ff;
    --primary-400: #748ffc;
    --primary-500: #5c7cfa;
    --primary-600: #4c6ef5;
    --primary-700: #4263eb;
    --primary-800: #3b5bdb;
    --primary-900: #364fc7;

    /* Accent */
    --accent-400: #38d9a9;
    --accent-500: #20c997;
    --accent-600: #12b886;

    /* Receipt (Green/Success) */
    --receipt-50: #ebfbee;
    --receipt-100: #d3f9d8;
    --receipt-200: #b2f2bb;
    --receipt-400: #69db7c;
    --receipt-500: #51cf66;
    --receipt-600: #40c057;
    --receipt-700: #37b24d;
    --receipt-800: #2f9e44;

    /* Payment (Red/Expense) */
    --payment-50: #fff5f5;
    --payment-100: #ffe3e3;
    --payment-200: #ffc9c9;
    --payment-400: #ff6b6b;
    --payment-500: #ff4757;
    --payment-600: #fa5252;
    --payment-700: #f03e3e;
    --payment-800: #e03131;

    /* Neutral */
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #868e96;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 64px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 6px 10px rgba(0,0,0,0.08);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.12), 0 10px 20px rgba(0,0,0,0.08);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: linear-gradient(180deg, #1a1f36 0%, #252b48 50%, #1a1f36 100%);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base);
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
}

.sidebar-brand {
    padding: 24px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-500), var(--accent-500));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    box-shadow: 0 4px 15px rgba(92, 124, 250, 0.4);
}

.sidebar-brand h1 {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.sidebar-brand h1 small {
    display: block;
    font-size: 0.7rem;
    font-weight: 400;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-section-title {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.35);
    padding: 16px 12px 6px;
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--border-radius-sm);
    color: rgba(255,255,255,0.65);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-item:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
    transform: translateX(2px);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(92, 124, 250, 0.2), rgba(32, 201, 151, 0.15));
    color: #fff;
    box-shadow: inset 0 0 0 1px rgba(92, 124, 250, 0.3);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: linear-gradient(180deg, var(--primary-500), var(--accent-500));
    border-radius: 0 3px 3px 0;
}

.nav-item .icon {
    font-size: 1.15rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

/* ---------- Main Content Area ---------- */
.main-wrapper {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---------- Top Header ---------- */
.top-header {
    height: var(--header-height);
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.top-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.top-header-left h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.breadcrumb a {
    color: var(--primary-600);
    text-decoration: none;
}

.top-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-700);
}

/* ---------- Page Content ---------- */
.page-content {
    flex: 1;
    padding: 28px 32px;
}

/* ---------- Cards ---------- */
.card {
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: box-shadow var(--transition-base);
    overflow: hidden;
}

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

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.card-body {
    padding: 24px;
}

/* ---------- Summary Stats ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: #fff;
    border-radius: var(--border-radius);
    padding: 22px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 18px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-card.receipt::before {
    background: linear-gradient(90deg, var(--receipt-500), var(--receipt-400));
}
.stat-card.payment::before {
    background: linear-gradient(90deg, var(--payment-500), var(--payment-400));
}
.stat-card.balance::before {
    background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.stat-card.receipt .stat-icon {
    background: var(--receipt-50);
    color: var(--receipt-700);
}
.stat-card.payment .stat-icon {
    background: var(--payment-50);
    color: var(--payment-700);
}
.stat-card.balance .stat-icon {
    background: var(--primary-50);
    color: var(--primary-700);
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gray-500);
    font-weight: 600;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.02em;
    font-family: 'JetBrains Mono', monospace;
}

/* ---------- Filter Bar ---------- */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    white-space: nowrap;
}

/* ---------- Forms ---------- */
input[type="text"],
input[type="number"],
input[type="date"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--gray-800);
    background: #fff;
    transition: all var(--transition-fast);
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(92, 124, 250, 0.12);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gray-700);
}

.form-group .error-message {
    color: var(--payment-600);
    font-size: 0.78rem;
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--border-radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.4;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
    color: #fff;
    box-shadow: 0 2px 8px rgba(66, 99, 235, 0.35);
}

.btn-primary:hover {
    box-shadow: 0 4px 16px rgba(66, 99, 235, 0.45);
}

.btn-success {
    background: linear-gradient(135deg, var(--receipt-600), var(--receipt-700));
    color: #fff;
    box-shadow: 0 2px 8px rgba(55, 178, 77, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, var(--payment-600), var(--payment-700));
    color: #fff;
    box-shadow: 0 2px 8px rgba(240, 62, 62, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    border-color: var(--primary-400);
    color: var(--primary-600);
    background: var(--primary-50);
}

.btn-sm {
    padding: 7px 14px;
    font-size: 0.8rem;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.btn-export {
    background: linear-gradient(135deg, #1b7a3d, #20894a);
    color: #fff;
    box-shadow: 0 2px 8px rgba(32, 137, 74, 0.3);
}

.btn-export-pdf {
    background: linear-gradient(135deg, #c0392b, #d63031);
    color: #fff;
    box-shadow: 0 2px 8px rgba(192, 57, 43, 0.3);
}

/* ---------- Daybook Table Layout ---------- */
.daybook-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 24px;
}

.daybook-section {
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

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

.daybook-section-header {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

.daybook-section.receipt .daybook-section-header {
    background: linear-gradient(135deg, var(--receipt-600), var(--receipt-700));
    color: #fff;
}

.daybook-section.payment .daybook-section-header {
    background: linear-gradient(135deg, var(--payment-600), var(--payment-700));
    color: #fff;
}

.daybook-section-header .badge {
    background: rgba(255,255,255,0.25);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ---------- Daybook Table ---------- */
.daybook-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.daybook-table thead th {
    padding: 12px 14px;
    text-align: left;
    font-weight: 700;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-500);
    background: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
}

.daybook-table thead th:last-child {
    text-align: right;
}

.daybook-table tbody td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.daybook-table tbody tr {
    transition: background var(--transition-fast);
}

.daybook-table tbody tr:hover {
    background: var(--gray-50);
}

.daybook-table tbody td:last-child {
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.9rem;
}

.daybook-table tbody td .date {
    font-size: 0.82rem;
    color: var(--gray-600);
    font-weight: 500;
}

.daybook-table tbody td .folio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    padding: 2px 8px;
    background: var(--gray-100);
    border-radius: 6px;
    font-size: 0.78rem;
    color: var(--gray-600);
    font-weight: 500;
}

.daybook-table tfoot td {
    padding: 14px;
    font-weight: 800;
    font-size: 1rem;
    font-family: 'JetBrains Mono', monospace;
    border-top: 2px solid var(--gray-300);
}

.receipt .daybook-table tfoot td {
    background: var(--receipt-50);
    color: var(--receipt-800);
}

.payment .daybook-table tfoot td {
    background: var(--payment-50);
    color: var(--payment-800);
}

.daybook-table tfoot td:last-child {
    text-align: right;
}

/* Entry actions */
.entry-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.daybook-table tbody tr:hover .entry-actions {
    opacity: 1;
}

.entry-actions a,
.entry-actions button {
    width: 30px;
    height: 30px;
    border: none;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.82rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.entry-actions a:hover {
    background: var(--primary-100);
    color: var(--primary-700);
}

.entry-actions button:hover {
    background: var(--payment-100);
    color: var(--payment-700);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-400);
}

.empty-state .icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.empty-state p {
    font-size: 0.88rem;
    font-weight: 500;
}

/* ---------- Modal ---------- */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-base);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: #fff;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    width: 95%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp var(--transition-slow);
}

.modal-header {
    padding: 22px 28px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-close {
    width: 34px;
    height: 34px;
    border: none;
    background: var(--gray-100);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--payment-100);
    color: var(--payment-600);
}

.modal-body {
    padding: 28px;
}

.modal-footer {
    padding: 18px 28px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ---------- Entry Type Toggle ---------- */
.entry-type-toggle {
    display: flex;
    gap: 0;
    background: var(--gray-100);
    border-radius: var(--border-radius-sm);
    padding: 4px;
    margin-bottom: 20px;
}

.entry-type-toggle label {
    flex: 1;
    text-align: center;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all var(--transition-fast);
    color: var(--gray-600);
}

.entry-type-toggle input[type="radio"] {
    display: none;
}

.entry-type-toggle input[value="receipt"]:checked + label {
    background: var(--receipt-600);
    color: #fff;
    box-shadow: 0 2px 8px rgba(55, 178, 77, 0.3);
}

.entry-type-toggle input[value="payment"]:checked + label {
    background: var(--payment-600);
    color: #fff;
    box-shadow: 0 2px 8px rgba(240, 62, 62, 0.3);
}

/* ---------- Flash Messages ---------- */
.flash-message {
    padding: 14px 20px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.4s ease;
}

.flash-message.success {
    background: var(--receipt-50);
    color: var(--receipt-800);
    border: 1px solid var(--receipt-200);
}

.flash-message.error {
    background: var(--payment-50);
    color: var(--payment-800);
    border: 1px solid var(--payment-200);
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ---------- Print Styles ---------- */
@media print {
    .sidebar, .top-header, .filter-bar, .entry-actions, .btn, .modal-overlay {
        display: none !important;
    }

    .main-wrapper {
        margin-left: 0 !important;
    }

    .page-content {
        padding: 0 !important;
    }

    .daybook-section {
        box-shadow: none !important;
        border: 1px solid #999 !important;
    }

    .stat-card {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .daybook-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0;
    }

    .mobile-toggle {
        display: block;
    }

    .top-header {
        padding: 0 16px;
    }

    .page-content {
        padding: 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ---------- Form page specific styles ---------- */
.form-page-container {
    max-width: 680px;
    margin: 0 auto;
}

.form-page-container .card {
    border: none;
    box-shadow: var(--shadow-md);
}

/* ---------- Delete form inline ---------- */
.delete-form {
    display: inline;
}