/*
|--------------------------------------------------------------------------
| ZMK Learning Platform - Master Theme File
|--------------------------------------------------------------------------
| Professional LMS Design with Dark Mode & Animations
|--------------------------------------------------------------------------
*/

/* ========================================================================
   CSS VARIABLES - LIGHT MODE
   ======================================================================== */
   :root {
    /* Brand Colors */
    --zmk-primary: #0d9488;
    --zmk-primary-light: #14b8a6;
    --zmk-primary-dark: #0f766e;
    --zmk-primary-soft: #ccfbf1;
    
    --zmk-secondary: #1e293b;
    --zmk-secondary-light: #334155;
    --zmk-secondary-dark: #0f172a;
    
    --zmk-accent: #f43f5e;
    
    /* Functional */
    --zmk-success: #10b981;
    --zmk-warning: #f59e0b;
    --zmk-danger: #ef4444;
    
    /* Backgrounds */
    --zmk-bg-body: #f8fafc;
    --zmk-bg-white: #ffffff;
    --zmk-bg-light: #f1f5f9;
    --zmk-bg-card: #ffffff;
    
    /* Text */
    --zmk-text-primary: #0f172a;
    --zmk-text-secondary: #475569;
    --zmk-text-muted: #94a3b8;
    --zmk-text-white: #ffffff;
    
    /* Borders */
    --zmk-border-light: #e2e8f0;
    --zmk-border-medium: #cbd5e1;
    
    /* Shadows */
    --zmk-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --zmk-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --zmk-shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --zmk-shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --zmk-shadow-xl: 0 20px 25px rgba(0,0,0,0.1);
    
    /* Typography */
    --zmk-font-ar: 'Cairo', sans-serif;
    --zmk-font-en: 'Inter', sans-serif;
    
    /* Radius */
    --zmk-radius-sm: 0.375rem;
    --zmk-radius: 0.5rem;
    --zmk-radius-md: 0.75rem;
    --zmk-radius-lg: 1rem;
    --zmk-radius-xl: 1.5rem;
    --zmk-radius-full: 9999px;
    
    /* Footer */
    --zmk-footer-bg: #0f172a;
    --zmk-footer-text: #94a3b8;
}

/* ========================================================================
   DARK MODE
   ======================================================================== */
[data-theme="dark"] {
    --zmk-primary: #14b8a6;
    --zmk-primary-light: #2dd4bf;
    --zmk-primary-dark: #0d9488;
    --zmk-primary-soft: #134e4a;
    
    --zmk-bg-body: #0f172a;
    --zmk-bg-white: #1e293b;
    --zmk-bg-light: #334155;
    --zmk-bg-card: #1e293b;
    
    --zmk-text-primary: #f1f5f9;
    --zmk-text-secondary: #cbd5e1;
    --zmk-text-muted: #94a3b8;
    
    --zmk-border-light: #334155;
    --zmk-border-medium: #475569;
    
    --zmk-footer-bg: #020617;
}

/* ========================================================================
   BASE
   ======================================================================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--zmk-font-en);
    font-size: 16px;
    line-height: 1.6;
    color: var(--zmk-text-primary);
    background-color: var(--zmk-bg-body);
    -webkit-font-smoothing: antialiased;
}

[dir="rtl"] body { font-family: var(--zmk-font-ar); }

/* ========================================================================
   NAVBAR - BIGGER
   ======================================================================== */
.zmk-navbar {
    background-color: var(--zmk-bg-white);
    border-bottom: 1px solid var(--zmk-border-light);
    min-height: 80px;
    position: sticky;
    top: 0;
    z-index: 1030;
    transition: all 0.3s;
}

.zmk-navbar.scrolled {
    box-shadow: var(--zmk-shadow-lg);
    min-height: 70px;
}

.zmk-navbar .container {
    min-height: 80px;
    display: flex;
    align-items: center;
}

.zmk-navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--zmk-text-primary);
}

.zmk-navbar-brand img { height: 50px; }
.zmk-navbar-brand:hover { color: var(--zmk-primary); }

/* Search */
.zmk-search-bar {
    position: relative;
    flex: 1;
    max-width: 480px;
    margin: 0 24px;
}

.zmk-search-bar input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    border: 2px solid var(--zmk-border-light);
    border-radius: var(--zmk-radius-full);
    font-size: 1rem;
    background: var(--zmk-bg-light);
    color: var(--zmk-text-primary);
    transition: all 0.3s;
}

[dir="rtl"] .zmk-search-bar input {
    padding: 14px 48px 14px 20px;
}

.zmk-search-bar input:focus {
    outline: none;
    border-color: var(--zmk-primary);
    background: var(--zmk-bg-white);
    box-shadow: 0 0 0 4px var(--zmk-primary-soft);
}

.zmk-search-bar button {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--zmk-text-muted);
    font-size: 1.1rem;
    cursor: pointer;
}

[dir="rtl"] .zmk-search-bar button { left: auto; right: 16px; }

/* Nav Links */
.zmk-nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--zmk-text-secondary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--zmk-radius);
    transition: all 0.3s;
}

.zmk-nav-link:hover {
    color: var(--zmk-primary);
    background: var(--zmk-primary-soft);
}

.zmk-nav-link.active {
    color: var(--zmk-primary);
    font-weight: 600;
}

/* Buttons */
.zmk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--zmk-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s;
}

.zmk-btn-primary {
    background: var(--zmk-primary);
    color: white;
    border-color: var(--zmk-primary);
}

.zmk-btn-primary:hover {
    background: var(--zmk-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--zmk-shadow-md);
    color: white;
}

.zmk-btn-sm { padding: 8px 16px; font-size: 0.9rem; }
.zmk-btn-lg { padding: 16px 32px; font-size: 1.1rem; }

/* User Avatar */
.zmk-user-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--zmk-radius-full);
    border: 2px solid var(--zmk-border-light);
    font-size: 1rem;
}

/* Theme Toggle */
.zmk-theme-toggle {
    width: 54px;
    height: 28px;
    background: var(--zmk-bg-light);
    border-radius: var(--zmk-radius-full);
    cursor: pointer;
    border: 2px solid var(--zmk-border-light);
    position: relative;
}

.zmk-theme-toggle::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--zmk-warning);
    border-radius: 50%;
    transition: 0.3s;
}

[data-theme="dark"] .zmk-theme-toggle::before {
    left: calc(100% - 22px);
    background: var(--zmk-primary);
}

.zmk-theme-toggle-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
}

.zmk-theme-toggle-icon.sun { left: 6px; color: var(--zmk-warning); }
.zmk-theme-toggle-icon.moon { right: 6px; color: var(--zmk-text-muted); }

/* ========================================================================
   FOOTER
   ======================================================================== */
.zmk-footer {
    background: var(--zmk-footer-bg);
    color: var(--zmk-footer-text);
    padding: 60px 0 24px;
}

.zmk-footer-brand img { height: 50px; margin-bottom: 16px; }

.zmk-footer-description {
    font-size: 0.95rem;
    line-height: 1.7;
    max-width: 300px;
}

.zmk-footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

.zmk-footer-links { list-style: none; }
.zmk-footer-links li { margin-bottom: 12px; }

.zmk-footer-links a,
.zmk-footer-links span {
    color: var(--zmk-footer-text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: 0.3s;
}

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

.zmk-footer-social {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.zmk-footer-social a {
    width: 40px;
    height: 40px;
    background: var(--zmk-secondary-light);
    color: var(--zmk-footer-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

.zmk-footer-social a:hover {
    background: var(--zmk-primary);
    color: white;
    transform: translateY(-3px);
}

.zmk-footer-bottom {
    border-top: 1px solid var(--zmk-secondary-light);
    margin-top: 40px;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.zmk-footer-copyright { font-size: 0.9rem; }

/* ========================================================================
   ANIMATIONS
   ======================================================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }

/* ========================================================================
   RESPONSIVE
   ======================================================================== */
@media (max-width: 991.98px) {
    .zmk-navbar, .zmk-navbar .container { min-height: 70px; }
    .zmk-navbar-brand img { height: 40px; }
    .zmk-search-bar { max-width: 100%; margin: 16px 0; }
}

@media (max-width: 767.98px) {
    .zmk-footer-bottom { flex-direction: column; text-align: center; }
}