/**
 * صحة ولياقة - Health & Fitness Platform
 * Shared Design System & Subpages Base Stylesheet (Phase 6)
 * Pure Vanilla CSS with Dynamic Theme Variables & Glassmorphism
 */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Master Brand Color Tokens */
    --primary: #10b981;
    --primary-rgb: 16, 185, 129;
    --primary-hover: #059669;
    --secondary: #06b6d4;
    --secondary-rgb: 6, 182, 212;
    --secondary-hover: #0891b2;
    --accent: #f97316;
    --accent-rgb: 249, 115, 22;
    --accent-yellow: #f59e0b;
    --info: #3b82f6;
    --info-rgb: 59, 130, 246;
    --purple: #a855f7;
    --purple-rgb: 168, 85, 247;
    --danger: #ef4444;
    --danger-rgb: 239, 68, 68;

    /* Theme Tokens - Default Dark Mode (Athletic & High Performance) */
    --bg-page: #090e17;
    --bg-surface: #0f172a;
    --bg-card: rgba(17, 24, 39, 0.72);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --border-color: rgba(255, 255, 255, 0.09);
    --border-color-hover: rgba(16, 185, 129, 0.35);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;
    --navbar-bg: rgba(9, 14, 23, 0.82);
    --glow-primary: rgba(16, 185, 129, 0.15);
    --glow-secondary: rgba(6, 182, 212, 0.12);
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.45);
    --glass-blur: blur(14px);
    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);

    /* Subpages Backward-Compatibility Aliases */
    --bg-calc: var(--bg-page);
    --surface-calc: var(--bg-card);
    --card-bg: var(--bg-card);
    --surface-card: var(--bg-card);
    --surface-border-calc: var(--border-color);
    --surface-border: var(--border-color);
    --text-main-calc: var(--text-main);
    --text-muted-calc: var(--text-muted);
    --primary-color: var(--secondary);
    --secondary-color: var(--primary);
    --accent-color: var(--accent);
    --info-color: var(--info);
    --purple-color: var(--purple);
    --danger-color: var(--danger);
    --warning-color: var(--accent-yellow);
    --success-color: var(--primary);
    --success-rgb: var(--primary-rgb);
    --warning-rgb: 245, 158, 11;
    --card-glow: rgba(6, 182, 212, 0.12);
    --accent-primary: var(--primary);
    --accent-primary-rgb: var(--primary-rgb);
}

/* Light Theme Variables */
body.light-mode {
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-hover: rgba(16, 185, 129, 0.45);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --navbar-bg: rgba(255, 255, 255, 0.88);
    --glow-primary: rgba(16, 185, 129, 0.1);
    --glow-secondary: rgba(6, 182, 212, 0.08);
    --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);

    /* Aliases in Light Mode */
    --bg-calc: var(--bg-page);
    --surface-calc: var(--bg-card);
    --card-bg: var(--bg-card);
    --surface-card: var(--bg-card);
    --surface-border-calc: var(--border-color);
    --surface-border: var(--border-color);
    --text-main-calc: var(--text-main);
    --text-muted-calc: var(--text-muted);
    --card-glow: rgba(6, 182, 212, 0.08);
}

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

html {
    scroll-behavior: smooth;
    direction: rtl;
}

body {
    font-family: 'Cairo', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.65;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

input, select, textarea, button {
    font-family: inherit;
}

/* Modern Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-page);
}

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.3);
    border-radius: 999px;
}

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

/* Atmospheric Ambient Glows */
.ambient-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow-orb-1 {
    position: absolute;
    top: -15%;
    right: 5%;
    width: 50vw;
    height: 50vw;
    max-width: 600px;
    max-height: 600px;
    background: radial-gradient(circle, var(--glow-primary) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    animation: orbFloat 18s ease-in-out infinite alternate;
}

.glow-orb-2 {
    position: absolute;
    bottom: 5%;
    left: -10%;
    width: 55vw;
    height: 55vw;
    max-width: 650px;
    max-height: 650px;
    background: radial-gradient(circle, var(--glow-secondary) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(45px);
    animation: orbFloat 22s ease-in-out infinite alternate-reverse;
}

@keyframes orbFloat {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 40px) scale(1.08); }
    100% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Containers */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Floating Navigation Bar (.fixed-nav) */
.fixed-nav {
    position: fixed;
    top: 24px;
    left: 24px;
    z-index: 1000;
    display: flex;
    gap: 12px;
}

.nav-btn {
    background: var(--surface-calc);
    border: 1px solid var(--surface-border-calc);
    color: var(--text-main-calc);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    text-decoration: none;
}

.nav-btn:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 20px rgba(var(--primary-rgb), 0.2);
    color: var(--primary-color);
}

/* ==========================================================================
   Subpage Header & Navbar System (.subpage-navbar & .site-header)
   ========================================================================== */
.subpage-navbar,
.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--navbar-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    min-height: 64px;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.nav-content,
.nav-container,
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.5rem 0;
}

/* Brand Area & Logo */
.brand-link,
.logo-area,
.brand-subpage {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none !important;
    color: var(--text-main) !important;
    font-weight: 800;
    font-size: 1.15rem;
    transition: var(--transition);
}

.brand-link:hover,
.logo-area:hover {
    color: var(--primary) !important;
}

.brand-badge,
.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.2), rgba(16, 185, 129, 0.2));
    border: 1px solid rgba(249, 115, 22, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary) !important;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.logo-title,
.brand-text {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-main) !important;
}

.logo-sub,
.tool-crumb {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-muted) !important;
}

/* Nav Actions & Groups */
.nav-actions,
.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Standardized Nav Buttons & Pills */
.btn-icon-sub,
.btn-subtle,
.subpage-theme-btn,
.back-home-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 38px;
    padding: 0 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main) !important;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none !important;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-icon-sub {
    width: 38px;
    padding: 0;
}

.btn-icon-sub:hover,
.btn-subtle:hover,
.subpage-theme-btn:hover,
.back-home-btn:hover {
    border-color: var(--primary);
    color: var(--primary) !important;
    transform: translateY(-2px);
    background: var(--bg-card-hover);
}

.btn-creator,
.developer-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 38px;
    padding: 0 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-muted) !important;
    font-size: 0.85rem;
    font-weight: 700;
    text-decoration: none !important;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-creator:hover,
.developer-pill:hover {
    border-color: var(--primary);
    color: var(--primary) !important;
    transform: translateY(-2px);
    background: var(--bg-card-hover);
}

.brand-link span,
.logo-area span,
.logo-title,
.brand-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: clamp(140px, 45vw, 300px);
}

.d-none-sm {
    display: inline-block;
}

@media (max-width: 640px) {
    .subpage-navbar,
    .site-header {
        min-height: 58px;
    }
    .container {
        padding: 0 0.85rem;
    }
    .d-none-sm {
        display: none !important;
    }
    .logo-sub, .tool-crumb {
        display: none !important;
    }
    .btn-creator,
    .developer-pill {
        width: 38px;
        padding: 0;
        justify-content: center;
    }
    .btn-creator span,
    .developer-pill span {
        display: none !important;
    }
    .btn-subtle, .back-home-btn {
        padding: 0 8px;
    }
    .nav-actions,
    .nav-left,
    .nav-right {
        gap: 6px;
    }
}

@media (max-width: 400px) {
    .brand-badge,
    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 1.05rem;
    }
    .brand-link {
        font-size: 0.95rem;
        gap: 6px;
    }
    .btn-icon-sub,
    .btn-creator,
    .subpage-theme-btn,
    .back-home-btn {
        width: 34px;
        height: 34px;
        font-size: 0.9rem;
    }
    .nav-actions,
    .nav-left,
    .nav-right {
        gap: 4px;
    }
}

/* Toast Notifications */
.platform-toast {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 9999;
    padding: 12px 20px;
    border-radius: 12px;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastSlideUp 0.3s ease;
}

@keyframes toastSlideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.toast-success {
    border-color: var(--primary);
    color: var(--primary);
}

.toast-info {
    border-color: var(--secondary);
    color: var(--secondary);
}

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

/* ==========================================================================
   Subpage Standardized Footers (.page-footer, .site-footer, .subpage-footer)
   ========================================================================== */
.page-footer,
.site-footer,
.subpage-footer,
.back-nav-panel {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    background: var(--navbar-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.88rem;
    transition: var(--transition);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copy,
.footer-credit {
    color: var(--text-muted) !important;
    font-size: 0.88rem;
    margin: 0;
    line-height: 1.6;
}

.footer-copy a,
.footer-credit a,
.footer-content a {
    color: var(--primary) !important;
    text-decoration: none !important;
    font-weight: 700;
    transition: var(--transition);
}

.footer-copy a:hover,
.footer-credit a:hover,
.footer-content a:hover {
    text-decoration: underline !important;
}

.theme-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 999px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-main);
}

.subpage-footer-links {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.subpage-footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.subpage-footer-links a:hover {
    color: var(--primary);
}

@media (max-width: 576px) {
    .fixed-nav {
        top: 16px;
        left: 16px;
    }
    .nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}