:root {
    /* Apple Palette - Default Light */
    --system-bg: #f5f5f7;
    --card-bg: rgba(255, 255, 255, 0.7);
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent: #007aff;
    --glass-border: rgba(255, 255, 255, 0.3);
    --blur: blur(20px);
}

/* التحويل اليدوي أو التلقائي للوضع المظلم */
[data-theme="dark"] {
    --system-bg: #000000;
    --card-bg: rgba(28, 28, 30, 0.7);
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent: #0a84ff;
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* الالتزام بإعدادات النظام إذا لم يتم التحديد يدوياً */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --system-bg: #000000;
        --card-bg: rgba(28, 28, 30, 0.7);
        --text-primary: #f5f5f7;
        --text-secondary: #86868b;
        --accent: #0a84ff;
        --glass-border: rgba(255, 255, 255, 0.1);
    }
}

/* تنسيق زر التبديل */
.theme-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--glass-border);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--text-primary);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--system-bg);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    transition: background-color 0.5s ease;
}

.login-container {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

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

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 8px;
    margin-right: 4px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(128, 128, 128, 0.08);
    border: 1px solid transparent;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: all 0.2s;
}

.form-group input:focus {
    background: transparent;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.btn {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 12px;
}

.btn:hover {
    filter: brightness(1.1);
    transform: scale(1.01);
}

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

.footer-links {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-links a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

/* Dashboard Layout fixes for RTL */
body.dashboard-body {
    display: block;
    padding: 0;
    margin: 0;
    overflow: hidden;
    height: 100vh;
}

.dashboard-container {
    display: flex;
    flex-direction: row;
    height: 100vh;
    width: 100vw;
    background-color: var(--system-bg);
}

.sidebar {
    width: 280px;
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-left: 1px solid var(--glass-border);
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 100;
}

.main-content {
    flex: 1;
    padding: 30px 40px;
    overflow-y: auto;
    background-color: var(--system-bg);
    display: flex;
    flex-direction: column;
}

.nav-item {
    padding: 14px 20px;
    border-radius: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 16px;
    font-weight: 500;
}

.nav-item.active {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.2);
}

.nav-item:hover:not(.active) {
    background: rgba(128, 128, 128, 0.08);
    color: var(--text-primary);
    transform: translateX(-5px);
    /* Slide left on hover in RTL */
}

/* Headers & Actions */
.header-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    width: 100%;
}

.header-actions h1 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Stats Grid - Apple Style Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-box {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: transform 0.3s ease;
}

.stat-box:hover {
    transform: translateY(-5px);
}

.stat-box h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--accent);
}

.stat-box p {
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
}

/* Question Cards Management */
.questions-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.q-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    border-radius: 24px;
    padding: 30px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    transition: all 0.3s ease;
}

.q-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

/* Modal SF Style Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    width: 90%;
    max-width: 650px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: 30px;
    padding: 40px;
    border: 1px solid var(--glass-border);
    transform: scale(0.9);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

/* Responsiveness overrides */

/* شاشات اللابتوب المتوسطة */
@media (max-width: 1200px) {
    .sidebar {
        width: 220px;
        padding: 30px 16px;
    }

    .sidebar h2 {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .nav-item {
        font-size: 14px;
        padding: 12px 16px;
    }

    .main-content {
        padding: 25px 30px;
    }

    .header-actions h1 {
        font-size: 22px;
    }
}

/* شاشات اللابتوب الصغيرة والتابلت */
@media (max-width: 1024px) {
    .sidebar {
        width: 200px;
        padding: 20px 12px;
    }

    .main-content {
        padding: 20px 24px;
    }

    .header-actions {
        margin-bottom: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        margin-bottom: 16px;
    }

    .stat-box {
        padding: 16px;
    }

    .stat-box h3 {
        font-size: 24px;
    }
}

/* التابلت والموبايل */
@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        padding: 12px 16px;
        flex-direction: row;
        gap: 8px;
        overflow-x: auto;
        border-left: none;
        border-bottom: 1px solid var(--glass-border);
    }

    .sidebar h2 {
        display: none;
        /* إخفاء العنوان لتوفير المساحة */
    }

    .main-content {
        padding: 16px;
    }

    .header-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 16px;
    }

    .header-actions .btn {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
        margin-bottom: 12px;
    }

    .nav-item {
        margin-bottom: 0;
        white-space: nowrap;
        padding: 10px 14px;
        font-size: 13px;
    }
}