:root {
    --primary: #0c3f7d;
    --primary-dark: #072a56;
    --primary-light: #e7eef8;
    --gold: #c81d2c;
    --accent-yellow: #f0b429;
    --text: #1f2937;
    --muted: #6b7280;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --border: #e2e6ea;
    --danger: #b3261e;
    --danger-bg: #fce8e6;
    --success: #14532d;
    --success-bg: #e3f5e8;
    --info-bg: #e7eef8;
    --info: #0c3f7d;
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Cairo', 'Tahoma', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.topbar {
    background: linear-gradient(90deg, var(--gold), var(--primary) 45%, var(--primary) 65%, var(--accent-yellow));
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
.topbar .brand, .topbar .main-nav a {
    text-shadow: 0 1px 3px rgba(0,0,0,.5);
}
.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    flex-wrap: wrap;
    gap: 10px;
}
.brand {
    color: #fff;
    font-weight: 900;
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.brand:hover { text-decoration: none; opacity: .9; }
.brand-logo { height: 40px; width: 40px; object-fit: contain; border-radius: 50%; background: #fff; }

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.main-nav {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.main-nav a {
    color: #fff;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: .95rem;
}
.main-nav a:hover { background: rgba(255,255,255,.15); text-decoration: none; }
.main-nav a.nav-logout { background: rgba(0,0,0,.2); }

/* Page */
.page { padding: 30px 20px 60px; }
.page-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-dark);
    margin: 0 0 20px;
}
.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 28px 0 14px;
    border-inline-start: 5px solid var(--gold);
    padding-inline-start: 10px;
}

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin-bottom: 18px;
    font-weight: 600;
}
.alert ul { margin: 0; padding-inline-start: 20px; }
.alert-success { background: var(--success-bg); color: var(--success); }
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-info { background: var(--info-bg); color: var(--info); }

/* Forms */
label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 600;
    font-size: .92rem;
    color: var(--text);
    margin-bottom: 14px;
}
input[type=text], input[type=password], input[type=number], select, textarea {
    font-family: inherit;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    background: #fff;
    color: var(--text);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.inline-form {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: end;
    background: var(--card-bg);
    padding: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 20px;
}
.inline-form label { margin-bottom: 0; flex-direction: row; align-items: center; gap: 8px; }
.inline-form select, .inline-form input { min-width: 160px; }

.card-form, .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 700;
    font-size: .95rem;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: var(--gold); }
.btn-secondary:hover { background: #9e1620; }
.btn-small { padding: 6px 12px; font-size: .85rem; }
.link-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-weight: 700;
    text-decoration: underline;
    padding: 0;
}

/* Tables */
.table-wrap { overflow-x: auto; margin-bottom: 20px; }
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 2px solid var(--primary-dark);
    min-width: 480px;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
}
.data-table th, .data-table td {
    padding: 10px 12px;
    text-align: start;
    border: 1px solid var(--border);
}
.data-table th {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 800;
    border: 1px solid var(--primary);
    letter-spacing: .2px;
}
.data-table input[type=number] { width: 80px; text-align: center; }

/* جداول الدرجات والشهادة: أعمدة أرقام كثيرة، محاذاة للوسط وعدم التفاف عناوين الأعمدة */
.grades-table { border: 3px solid var(--text); }
.grades-table th, .grades-table td { text-align: center; border: 1px solid #9aa1ab; }
.grades-table th { white-space: nowrap; }

/* أعمدة أسماء المواد/العناوين — مميزة عن الأرقام */
.data-table td.col-subject {
    text-align: start;
    font-weight: 800;
    background: var(--primary-light);
    color: var(--primary-dark);
    white-space: normal;
}
.data-table th.col-subject { text-align: start; }

/* أعمدة الامتحانات (نصف السنة / النهائي) — خلفية مميزة بالهيدر والبيانات */
.data-table th.col-exam {
    background: var(--accent-yellow);
    color: #3d2c00;
}
.data-table td.exam-cell {
    background: rgba(240, 180, 41, .18);
}
.data-table td.exam-cell input { background: #fffdf5; border-color: var(--accent-yellow); }

/* أعمدة المعدلات المحسوبة */
.data-table th.col-computed { background: var(--primary); color: #fff; }
.data-table th.col-final, .data-table td.col-final { background: #e8a3a3; color: #5c1414; }
.data-table td.col-final.computed-cell { color: #5c1414; }

.row-highlight { background: var(--primary-light); font-weight: 700; }
.paid-complete { color: var(--success); font-weight: 700; }
.computed-cell { background: var(--primary-light); font-weight: 800; color: var(--primary-dark); text-align: center; }

/* Grade grid / dashboard */
.stats-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 26px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 140px;
}
.stat-number { font-size: 1.8rem; font-weight: 900; color: var(--primary-dark); }
.stat-label { color: var(--muted); font-size: .9rem; margin-top: 4px; }

.grade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}
.grade-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    transition: transform .15s, box-shadow .15s;
}
.grade-card:hover {
    text-decoration: none;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0,0,0,.08);
    border-color: var(--primary);
}
.grade-name { display: block; font-weight: 800; color: var(--primary-dark); font-size: 1.05rem; }
.grade-count { display: block; color: var(--muted); margin-top: 6px; font-size: .9rem; }

.quick-links { display: flex; gap: 12px; flex-wrap: wrap; margin: 10px 0 30px; }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.plain-list { list-style: none; padding: 0; margin: 0; }
.plain-list li { padding: 6px 0; border-bottom: 1px dashed var(--border); }
.plain-list li:last-child { border-bottom: none; }

hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* Notes */
.notes-list { display: flex; flex-direction: column; gap: 14px; }
.note-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-inline-start: 5px solid var(--gold);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.note-item p { margin: 0 0 10px; }
.note-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted);
    font-size: .85rem;
}

/* Podium */
.podium {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.podium-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 24px;
    text-align: center;
    flex: 1;
    min-width: 150px;
}
.podium-item.rank-1 { border-color: var(--accent-yellow); box-shadow: 0 4px 14px rgba(240,180,41,.35); }
.podium-item.is-me { background: var(--primary-light); }
.medal { display: block; font-size: 2rem; }
.podium-name { display: block; font-weight: 800; margin-top: 6px; }
.podium-score { display: block; color: var(--muted); margin-top: 4px; }

.badge {
    background: var(--accent-yellow);
    color: #3d2c00;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 700;
}

/* Admin media manager */
.media-manage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 30px;
}
.media-manage-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    padding-bottom: 10px;
}
.media-manage-item img, .media-manage-item video {
    width: 100%;
    height: 140px;
    object-fit: cover;
    display: block;
    background: #000;
}
.media-manage-item form { text-align: center; margin-top: 8px; }

/* Public homepage */
.hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary) 55%, var(--gold) 90%, var(--accent-yellow));
    color: #fff;
    text-align: center;
    padding: 70px 20px;
    border-radius: var(--radius);
    margin-bottom: 10px;
}
.hero h1 { margin: 0 0 12px; font-size: 2rem; font-weight: 900; }
.hero p { margin: 0 0 26px; font-size: 1.1rem; opacity: .95; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
    padding: 8px 18px;
}
.btn-outline:hover { background: rgba(255,255,255,.15); text-decoration: none; }

.home-section { padding: 40px 0; scroll-margin-top: 20px; }
.about-text { font-size: 1.05rem; line-height: 2; max-width: 800px; }
.about-closing { font-weight: 700; color: var(--primary-dark); }

.features-list {
    list-style: none;
    padding: 0;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0 0 30px;
}
.features-list li {
    position: relative;
    padding-inline-start: 30px;
    font-size: 1.02rem;
    line-height: 1.7;
}
.features-list li::before {
    content: "✓";
    position: absolute;
    inset-inline-start: 0;
    top: 0;
    color: #fff;
    background: var(--primary);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
    font-weight: 900;
}

.motto-box {
    background: linear-gradient(135deg, var(--primary-light), #fff);
    border: 1px solid var(--border);
    border-inline-start: 5px solid var(--gold);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 500px;
    text-align: center;
    margin: 20px 0 30px;
}
.motto-label {
    display: inline-block;
    background: var(--accent-yellow);
    color: #3d2c00;
    padding: 3px 14px;
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.motto-ar { font-size: 1.3rem; font-weight: 900; color: var(--primary-dark); margin: 8px 0 4px; }
.motto-en { font-size: 1rem; font-style: italic; color: var(--muted); margin: 0; }

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}
.gallery-item {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    aspect-ratio: 4 / 3;
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; display: block; }

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}
.video-item {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: #000;
}
.video-item video { width: 100%; display: block; max-height: 260px; }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}
.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-inline-start: 5px solid var(--gold);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.contact-icon { font-size: 1.6rem; }
.contact-label { font-weight: 700; color: var(--primary-dark); }
.contact-value { color: var(--text); line-height: 1.9; }
.contact-value a { color: var(--primary); font-weight: 700; }

/* Login / install pages */
.login-box, .install-box {
    max-width: 480px;
    margin: 40px auto;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
}
.install-box { max-width: 640px; }
.install-form h2 {
    font-size: 1rem;
    color: var(--primary-dark);
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: 16px;
}
.install-form h2:first-child { border-top: none; padding-top: 0; margin-top: 0; }
.login-form .btn, .install-form .btn { width: 100%; padding: 12px; font-size: 1.05rem; margin-top: 8px; }
.hint { color: var(--muted); font-size: .9rem; }

.add-box summary { cursor: pointer; margin-bottom: 14px; list-style: none; }
.add-box summary::-webkit-details-marker { display: none; }

/* Footer */
.site-footer {
    background: linear-gradient(90deg, var(--gold), var(--primary) 45%, var(--primary) 65%, var(--accent-yellow));
    color: #fff;
    text-shadow: 0 1px 3px rgba(0,0,0,.5);
    padding: 20px 0;
    text-align: center;
    font-size: .9rem;
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 780px) {
    .nav-toggle { display: block; }
    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 2px;
        padding-top: 10px;
    }
    .main-nav.open { display: flex; }
    .inline-form { flex-direction: column; align-items: stretch; }
    .inline-form select, .inline-form input { width: 100%; }
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d1a26;
        --card-bg: #132536;
        --text: #e8eef5;
        --muted: #93a6b8;
        --border: #22384a;
        --primary-light: #1a3450;
        --info-bg: #1a3450;
        --danger-bg: #3a1a1a;
        --success-bg: #123321;
    }
    input[type=text], input[type=password], input[type=number], select, textarea {
        background: #0d1a26;
        color: var(--text);
    }
}