*,
*::before,
*::after {
    box-sizing: border-box;
}

/* وضع الليل الافتراضي */
:root {
    --bg: #0a1628;
    --card-bg: #0f2942;
    --card-bg-soft: #1a3a5c;
    --accent: #1e88e5;
    --accent-soft: #42a5f5;
    --accent-light: #bbdefb;
    --text-main: #e3f2fd;
    --text-soft: #90caf9;
    --border-soft: #1565c0;
    --danger: #ef5350;
    --success: #66bb6a;
    --warning: #ffa726;
    --radius-lg: 20px;
    --radius-md: 14px;
    --shadow-soft: 0 20px 50px rgba(30, 136, 229, 0.4);
    --shadow-card: 0 12px 30px rgba(30, 136, 229, 0.25);
    --gradient-primary: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    --gradient-card: linear-gradient(145deg, #0f2942 0%, #1a3a5c 100%);
    --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* وضع النهار */
body.light-theme {
    --bg: #e3f2fd;
    --card-bg: #ffffff;
    --card-bg-soft: #f5f9ff;
    --accent: #1565c0;
    --accent-soft: #1e88e5;
    --accent-light: #90caf9;
    --text-main: #0d47a1;
    --text-soft: #1976d2;
    --border-soft: #bbdefb;
    --danger: #ef5350;
    --success: #66bb6a;
    --warning: #ffa726;
    --shadow-soft: 0 15px 40px rgba(21, 101, 192, 0.2);
    --shadow-card: 0 10px 25px rgba(21, 101, 192, 0.1);
    --gradient-primary: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f5f9ff 100%);
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background: radial-gradient(circle at top, #0d47a1 0%, #0a1628 45%, #020a15 100%);
    color: var(--text-main);
}

/* في وضع النهار الخلفية تكون أبسط */
body.light-theme {
    background: linear-gradient(180deg, #bbdefb 0%, #e3f2fd 50%, #ffffff 100%);
}

body {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.4rem 1rem 2.4rem;
}

/* Header */

.app-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.2rem;
}

.app-header h1 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 700;
}

.app-header p {
    margin: 0.2rem 0 0;
    font-size: 0.9rem;
    color: var(--text-soft);
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    justify-content: flex-end;
}

/* Cards & layout */

.card {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    padding: 1.1rem 1rem 1.2rem;
    margin-bottom: 1rem;
    border: 2px solid var(--border-soft);
    box-shadow: var(--shadow-card);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(30, 136, 229, 0.35);
}

body.light-theme .card {
    background: var(--gradient-card);
    border-color: var(--border-soft);
}

body.light-theme .card:hover {
    box-shadow: 0 12px 35px rgba(21, 101, 192, 0.2);
}

.card h2,
.list-section h2 {
    margin: 0 0 0.8rem;
    font-size: 1.1rem;
}

#toggleFormBtn {
    transition: opacity 0.2s;
}

#toggleFormBtn:hover {
    opacity: 0.8;
}

#toggleFormBtn button {
    transition: transform 0.2s;
}

/* Dashboard */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.7rem;
    margin-bottom: 0.8rem;
}

.dash-item {
    background: var(--card-bg-soft);
    border-radius: var(--radius-md);
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border-soft);
}

.dash-item .label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-soft);
}

.dash-item .value {
    display: block;
    margin-top: 0.2rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.dash-item .value.small {
    font-size: 0.82rem;
}

/* Global progress */

.progress-bar-wrapper {
    margin-top: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.progress-outer {
    flex: 1;
    background: #020617;
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid var(--border-soft);
    height: 10px;
}

body.light-theme .progress-outer {
    background: #e5e7eb;
}

.progress-inner {
    height: 100%;
    background: linear-gradient(90deg, #22c55e, #06b6d4, #0f4c81);
    transition: width 0.25s ease;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-soft);
}

/* Stats */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.stat-card {
    background: radial-gradient(circle at top left, #1e88e5 0%, #1565c0 60%, #0d47a1 100%);
    border-radius: var(--radius-md);
    padding: 0.7rem 0.8rem;
    border: 2px solid var(--accent-soft);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: scale(1.03);
}

body.light-theme .stat-card {
    background: linear-gradient(145deg, #bbdefb, #e3f2fd, #ffffff);
    border-color: var(--accent);
}

.stat-card .label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-soft);
}

.stat-card .value {
    display: block;
    margin-top: 0.25rem;
    font-weight: 700;
    font-size: 0.95rem;
}

.stat-card .highlight {
    color: #fbbf24;
}

/* Filters */

.filters {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
    margin-bottom: 0.8rem;
}

.filter-group {
    background: #020617;
    border-radius: var(--radius-md);
    padding: 0.6rem 0.7rem 0.7rem;
    border: 1px solid var(--border-soft);
}

body.light-theme .filter-group {
    background: #ffffff;
}

.filter-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-soft);
    margin-bottom: 0.2rem;
}

/* Form */

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-soft);
    margin-bottom: 0.25rem;
}

input,
select,
textarea {
    background: #020617;
    border-radius: 12px;
    border: 1px solid var(--border-soft);
    padding: 0.55rem 0.7rem;
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
}

body.light-theme input,
body.light-theme select,
body.light-theme textarea {
    background: #f9fafb;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent-soft);
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.6);
}

textarea {
    resize: vertical;
}

.form-actions {
    grid-column: 1 / -1;
    display: flex;
    justify-content: flex-end;
    margin-top: 0.3rem;
}

/* Buttons */

.btn {
    border: none;
    border-radius: 999px;
    padding: 0.5rem 0.9rem;
    font-size: 0.86rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s, opacity 0.12s;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.primary-btn {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(30, 136, 229, 0.5);
}

.primary-btn:hover {
    box-shadow: 0 15px 40px rgba(30, 136, 229, 0.7);
    transform: translateY(-2px);
}

.ghost-btn {
    background: transparent;
    border: 1px solid var(--border-soft);
    color: var(--text-soft);
}

.ghost-btn:hover {
    border-color: var(--accent-soft);
    color: var(--accent-soft);
}

.btn.danger {
    border-color: var(--danger);
    color: var(--danger);
}

.btn.danger:hover {
    background: rgba(248, 113, 113, 0.12);
}

/* Teachers list */

.list-section {
    margin-top: 0.8rem;
}

.teachers-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

/* Animation للكرت */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.teacher-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 0.8rem 0.75rem;
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: var(--shadow-card);
    animation: fadeInUp 0.22s ease-out;
}

.teacher-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
    gap: 0.4rem;
}

/* صورة المدرس */
.teacher-main-info {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.teacher-avatar {
    width: 38px;
    height: 38px;
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    background: #020617;
    font-size: 0.85rem;
    color: var(--accent-light);
}

.teacher-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.teacher-name {
    font-weight: 600;
    font-size: 0.98rem;
}

.teacher-pill {
    font-size: 0.75rem;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    color: var(--text-soft);
}

/* ألوان المواد */
.subject-math {
    background: rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.6);
    color: #bfdbfe;
}
.subject-english {
    background: rgba(52, 211, 153, 0.12);
    border-color: rgba(52, 211, 153, 0.6);
    color: #bbf7d0;
}
.subject-arabic {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.6);
    color: #fecaca;
}
.subject-other {
    background: rgba(234, 179, 8, 0.12);
    border-color: rgba(234, 179, 8, 0.6);
    color: #fef3c7;
}

.teacher-body {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    margin-top: 0.25rem;
}

.teacher-body .item-label {
    font-size: 0.75rem;
    color: var(--text-soft);
}

.teacher-body .item-value {
    display: block;
    font-size: 0.9rem;
    margin-top: 0.1rem;
}

.teacher-body .remaining {
    color: #facc15;
}

.teacher-footer {
    margin-top: 0.45rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.4rem;
}

.notes {
    font-size: 0.75rem;
    color: #9ca3af;
    max-width: 60%;
}

.badge {
    font-size: 0.75rem;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
}

.badge-open {
    background: rgba(250, 204, 21, 0.12);
    color: #facc15;
}

.badge-done {
    background: rgba(52, 211, 153, 0.12);
    color: #4ade80;
}

/* Modal */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 40;
}

body.light-theme .modal {
    background: rgba(15, 23, 42, 0.55);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: #020617;
    border-radius: 18px;
    padding: 1rem 1rem 1.1rem;
    width: min(380px, 92vw);
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-soft);
}

body.light-theme .modal-content {
    background: #ffffff;
}

.modal-content h3 {
    margin: 0 0 0.2rem;
    font-size: 1.05rem;
}

.modal-subtitle {
    margin: 0 0 0.7rem;
    font-size: 0.85rem;
    color: var(--text-soft);
}

.modal-actions {
    justify-content: space-between;
}

/* Image upload section */

.image-upload-section {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.image-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.image-preview {
    width: 100%;
    max-width: 200px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--border-soft);
    background: var(--card-bg-soft);
}

.image-preview img {
    width: 100%;
    height: auto;
    display: block;
}

/* History list */

.history-list {
    max-height: 260px;
    overflow-y: auto;
    padding-right: 0.2rem;
    margin-bottom: 0.6rem;
    font-size: 0.85rem;
}

.history-item {
    display: flex;
    justify-content: space-between;
    padding: 0.3rem 0;
    border-bottom: 1px dashed var(--border-soft);
}

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

/* Attachments */

.modal-large {
    width: min(600px, 95vw);
    max-height: 85vh;
    overflow-y: auto;
}

.attachment-upload-section {
    background: var(--card-bg-soft);
    border-radius: var(--radius-md);
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-soft);
}

.attachment-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.attachments-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1rem;
    max-height: 400px;
    overflow-y: auto;
}

.attachment-item {
    background: var(--card-bg-soft);
    border-radius: var(--radius-md);
    padding: 0.7rem;
    border: 1px solid var(--border-soft);
    display: flex;
    gap: 0.8rem;
    align-items: flex-start;
}

.attachment-thumbnail {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    background: #020617;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid var(--border-soft);
    cursor: pointer;
    transition: transform 0.15s;
}

.attachment-thumbnail:hover {
    transform: scale(1.05);
}

.attachment-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.attachment-thumbnail.pdf {
    font-size: 2rem;
    color: var(--danger);
}

.attachment-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.attachment-note {
    font-size: 0.88rem;
    color: var(--text-main);
    font-weight: 500;
}

.attachment-date {
    font-size: 0.75rem;
    color: var(--text-soft);
}

.attachment-actions {
    display: flex;
    gap: 0.3rem;
    align-items: flex-start;
}

.attachment-item .btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
}

.attachments-count {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-size: 0.75rem;
    color: var(--accent-soft);
    padding: 0.2rem 0.5rem;
    background: rgba(15, 76, 129, 0.15);
    border-radius: 999px;
    border: 1px solid rgba(15, 76, 129, 0.3);
}

/* Full screen image viewer */

.image-viewer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    cursor: pointer;
}

.image-viewer-overlay img {
    max-width: 95%;
    max-height: 95%;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

/* Responsive */

@media (max-width: 800px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    body {
        padding-inline: 0.75rem;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        justify-content: flex-start;
    }

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

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

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

    .teacher-body {
        grid-template-columns: 1fr 1fr;
    }

    .notes {
        max-width: 100%;
    }
}