/**
 * EDUPRO - Premium CSS Stylesheet
 * Design System Moderno com Glassmorphism
 * Version: 2.0
 */

/* ============================================
   CSS VARIABLES - Design Tokens
============================================ */
:root {
    /* Primary Colors */
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;
    
    /* Secondary (Purple) */
    --secondary-400: #A78BFA;
    --secondary-500: #8B5CF6;
    --secondary-600: #7C3AED;
    
    /* Accent (Amber) */
    --accent-400: #FBBF24;
    --accent-500: #F59E0B;
    --accent-600: #D97706;
    
    /* Neutral Colors */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --gray-950: #030712;
    
    /* Semantic Colors */
    --success-500: #10B981;
    --warning-500: #F59E0B;
    --danger-500: #EF4444;
    --info-500: #3B82F6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #A855F7 100%);
    --gradient-dark: linear-gradient(135deg, #1F2937 0%, #111827 100%);
    --gradient-light: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
    --gradient-mesh: radial-gradient(at 40% 20%, #818CF8 0px, transparent 50%),
                     radial-gradient(at 80% 0%, #A78BFA 0px, transparent 50%),
                     radial-gradient(at 0% 50%, #6366F1 0px, transparent 50%);
    
    /* Typography */
    --font-heading: 'Sora', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);
    --shadow-glow-lg: 0 0 60px rgba(99, 102, 241, 0.4);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   BASE STYLES
============================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body.has-announcement {
    padding-top: 48px;
}

body.mobile-nav-open {
    overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.25;
    margin: 0;
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

img {
    max-width: 100%;
    height: auto;
}

/* Text Gradient */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   ANNOUNCEMENT BAR
============================================ */
.announcement-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--gradient-primary);
    z-index: var(--z-fixed);
    overflow: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.announcement-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.1) 0%, 
        rgba(255,255,255,0) 50%, 
        rgba(255,255,255,0.1) 100%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.announcement-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--space-4);
}

.announcement-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.announcement-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    color: white;
}

.announcement-badge i {
    font-size: 0.875rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.announcement-text {
    color: white;
    font-size: var(--text-sm);
}

.announcement-code {
    display: inline-block;
    padding: var(--space-1) var(--space-2);
    background: rgba(255,255,255,0.25);
    border-radius: var(--radius-sm);
    font-family: monospace;
    margin: 0 var(--space-1);
}

.announcement-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.announcement-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    background: white;
    color: var(--primary-600);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.announcement-cta:hover {
    background: var(--gray-100);
    color: var(--primary-700);
    transform: translateX(2px);
}

.announcement-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255,255,255,0.2);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.announcement-close:hover {
    background: rgba(255,255,255,0.3);
    transform: rotate(90deg);
}

/* ============================================
   HEADER / NAVBAR
============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

body.has-announcement .header {
    top: 48px;
}

.header .navbar {
    padding: var(--space-4) 0;
    background: transparent;
    transition: all var(--transition-base);
}

.header.scrolled .navbar {
    padding: var(--space-3) 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    box-shadow: var(--shadow-sm);
}

.header.header-hidden {
    transform: translateY(-100%);
}

/* Brand Logo */
.navbar-brand {
    padding: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.brand-icon {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.navbar-brand:hover .brand-icon {
    transform: scale(1.05);
}

.brand-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.brand-edu {
    color: var(--gray-900);
}

.brand-pro {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Nav Links */
.navbar-nav {
    gap: var(--space-1);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-600);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-link i {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

.dropdown:hover .nav-link i {
    transform: rotate(180deg);
}

/* Mobile Toggle */
.navbar-toggler {
    width: 44px;
    height: 44px;
    padding: 0;
    border: none;
    background: transparent;
    position: relative;
}

.toggler-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 24px;
    height: 24px;
    margin: auto;
}

.toggler-icon span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.navbar-toggler.active .toggler-icon span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar-toggler.active .toggler-icon span:nth-child(2) {
    opacity: 0;
}

.navbar-toggler.active .toggler-icon span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Navbar Actions */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--gray-600);
    font-size: var(--text-lg);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

.nav-action-btn:hover {
    background: var(--primary-50);
    color: var(--primary-600);
}

.cart-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--primary-500);
    color: white;
    font-size: 0.625rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.btn-auth {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.btn-auth-ghost {
    color: var(--gray-700);
    background: transparent;
}

.btn-auth-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.btn-auth-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-auth-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    color: white;
}

.btn-auth-primary i {
    transition: transform var(--transition-fast);
}

.btn-auth-primary:hover i {
    transform: translateX(4px);
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-trigger:hover {
    background: var(--gray-200);
}

.user-avatar {
    position: relative;
    width: 36px;
    height: 36px;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.user-status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background: var(--success-500);
    border: 2px solid white;
    border-radius: var(--radius-full);
}

.user-info {
    text-align: left;
}

.user-name {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.2;
}

.user-role {
    display: block;
    font-size: var(--text-xs);
    color: var(--gray-500);
}

.user-trigger > i {
    font-size: 0.625rem;
    color: var(--gray-500);
    margin-left: var(--space-1);
    transition: transform var(--transition-fast);
}

.user-dropdown.show .user-trigger > i {
    transform: rotate(180deg);
}

/* User Menu Dropdown */
.user-menu {
    min-width: 280px;
    padding: 0;
    margin-top: var(--space-2);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.user-menu-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--gradient-light);
    border-bottom: 1px solid var(--gray-200);
}

.user-menu-header img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    object-fit: cover;
}

.user-menu-info strong {
    display: block;
    font-size: var(--text-sm);
    color: var(--gray-900);
}

.user-menu-info span {
    display: block;
    font-size: var(--text-xs);
    color: var(--gray-500);
}

.user-menu-body {
    padding: var(--space-2);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    color: var(--gray-700);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.user-menu-item:hover {
    background: var(--gray-50);
    color: var(--primary-600);
}

.user-menu-item i:first-child {
    font-size: var(--text-lg);
    width: 24px;
    text-align: center;
}

.user-menu-item span {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: 500;
}

.user-menu-item i:last-child {
    font-size: 0.625rem;
    color: var(--gray-400);
}

.user-menu-footer {
    padding: var(--space-2);
    border-top: 1px solid var(--gray-200);
}

.user-menu-item.logout:hover {
    background: #FEF2F2;
    color: var(--danger-500);
}

/* ============================================
   MEGA MENU
============================================ */
.mega-dropdown {
    position: static;
}

.mega-menu {
    width: 100%;
    left: 0;
    right: 0;
    padding: 0;
    margin-top: 0;
    background: white;
    border: none;
    border-top: 1px solid var(--gray-200);
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
}

.mega-dropdown:hover .mega-menu,
.mega-dropdown .mega-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-inner {
    padding: var(--space-6);
}

.mega-menu-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr 280px;
    gap: var(--space-8);
}

.mega-section {
    padding-right: var(--space-6);
    border-right: 1px solid var(--gray-100);
}

.mega-section:last-child {
    padding-right: 0;
    border-right: none;
}

.mega-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    margin-bottom: var(--space-4);
}

.mega-title i {
    font-size: var(--text-sm);
}

/* Mega Categories */
.mega-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mega-cat-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-lg);
    color: var(--gray-700);
    transition: all var(--transition-fast);
}

.mega-cat-item:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.mega-cat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: color-mix(in srgb, var(--cat-color) 15%, white);
    color: var(--cat-color);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
}

.mega-cat-name {
    flex: 1;
    font-size: var(--text-sm);
    font-weight: 500;
}

.mega-cat-item > i:last-child {
    font-size: 0.625rem;
    color: var(--gray-400);
    opacity: 0;
    transform: translateX(-4px);
    transition: all var(--transition-fast);
}

.mega-cat-item:hover > i:last-child {
    opacity: 1;
    transform: translateX(0);
}

.mega-view-all {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding: var(--space-2) 0;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--primary-600);
}

.mega-view-all:hover {
    color: var(--primary-700);
}

.mega-view-all i {
    transition: transform var(--transition-fast);
}

.mega-view-all:hover i {
    transform: translateX(4px);
}

/* Mega Courses */
.mega-courses {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.mega-course-card {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-3);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.mega-course-card:hover {
    background: var(--gray-100);
    transform: translateX(4px);
}

.mega-course-img {
    position: relative;
    flex-shrink: 0;
    width: 100px;
    height: 70px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.mega-course-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mega-course-badge {
    position: absolute;
    top: var(--space-1);
    left: var(--space-1);
    padding: 2px 6px;
    background: var(--accent-500);
    color: white;
    font-size: 0.625rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
}

.mega-course-info {
    flex: 1;
    min-width: 0;
}

.mega-course-info h6 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-1);
    line-height: 1.3;
}

.mega-course-author {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

.mega-course-price {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.price-free {
    color: var(--success-500);
    font-size: var(--text-sm);
    font-weight: 700;
}

.price-old {
    font-size: var(--text-xs);
    color: var(--gray-400);
    text-decoration: line-through;
}

.price-new {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--primary-600);
}

.mega-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    text-align: center;
    color: var(--gray-400);
}

.mega-empty i {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.mega-empty p {
    font-size: var(--text-sm);
    margin: 0;
}

/* Mega Promo */
.mega-promo {
    border-right: none !important;
    padding-right: 0 !important;
}

.mega-promo-card {
    position: relative;
    padding: var(--space-6);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    height: 100%;
}

.mega-promo-content {
    position: relative;
    z-index: 1;
}

.mega-promo-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: var(--text-xs);
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
}

.mega-promo-card h5 {
    color: white;
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
}

.mega-promo-card p {
    color: rgba(255,255,255,0.8);
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

.mega-promo-price {
    margin-bottom: var(--space-4);
}

.mega-promo-price .price {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: white;
}

.mega-promo-price .period {
    font-size: var(--text-sm);
    color: rgba(255,255,255,0.7);
}

.mega-promo-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: white;
    color: var(--primary-600);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.mega-promo-btn:hover {
    background: var(--gray-100);
    color: var(--primary-700);
    transform: translateY(-2px);
}

.mega-promo-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.promo-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.promo-circle:first-child {
    width: 200px;
    height: 200px;
    top: -100px;
    right: -50px;
}

.promo-circle:last-child {
    width: 150px;
    height: 150px;
    bottom: -75px;
    left: -25px;
}

/* ============================================
   SEARCH MODAL
============================================ */
.search-modal {
    background: white;
    border: none;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
}

.search-modal-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--gray-200);
}

.search-input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.search-input-wrapper > i {
    font-size: var(--text-xl);
    color: var(--gray-400);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: var(--text-lg);
    color: var(--gray-900);
    background: transparent;
}

.search-input::placeholder {
    color: var(--gray-400);
}

.search-kbd {
    padding: var(--space-1) var(--space-2);
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: var(--text-xs);
    color: var(--gray-500);
}

.search-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    color: var(--gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.search-modal-body {
    padding: var(--space-6);
    max-height: 400px;
    overflow-y: auto;
}

.search-section {
    margin-bottom: var(--space-6);
}

.search-section:last-child {
    margin-bottom: 0;
}

.search-section-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
}

.search-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.search-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: var(--text-sm);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.search-tag:hover {
    background: var(--primary-50);
    color: var(--primary-600);
}

.search-tag i {
    font-size: 0.75rem;
    color: var(--gray-400);
}

.search-modal-footer {
    padding: var(--space-3) var(--space-6);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.search-shortcuts {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    font-size: var(--text-xs);
    color: var(--gray-500);
}

.search-shortcuts kbd {
    padding: 2px 6px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: monospace;
    margin: 0 var(--space-1);
}

/* ============================================
   FLASH MESSAGES
============================================ */
.flash-container {
    position: fixed;
    top: 100px;
    right: var(--space-6);
    z-index: var(--z-tooltip);
    transition: all var(--transition-base);
}

body.has-announcement .flash-container {
    top: 148px;
}

.flash-message {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-width: 320px;
    max-width: 450px;
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.flash-hiding {
    animation: slideOutRight 0.3s ease forwards;
}

@keyframes slideOutRight {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.flash-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    font-size: var(--text-xl);
}

.flash-success .flash-icon {
    background: #D1FAE5;
    color: var(--success-500);
}

.flash-danger .flash-icon {
    background: #FEE2E2;
    color: var(--danger-500);
}

.flash-warning .flash-icon {
    background: #FEF3C7;
    color: var(--warning-500);
}

.flash-info .flash-icon {
    background: #DBEAFE;
    color: var(--info-500);
}

.flash-content {
    flex: 1;
}

.flash-text {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-900);
}

.flash-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.flash-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.flash-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: currentColor;
    opacity: 0.3;
    animation: flashProgress 5s linear forwards;
}

.flash-success .flash-progress { background: var(--success-500); }
.flash-danger .flash-progress { background: var(--danger-500); }
.flash-warning .flash-progress { background: var(--warning-500); }
.flash-info .flash-progress { background: var(--info-500); }

@keyframes flashProgress {
    from { width: 100%; }
    to { width: 0; }
}

/* ============================================
   MOBILE OVERLAY
============================================ */
.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-sticky) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

body.mobile-nav-open .mobile-overlay {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   PRE-FOOTER CTA
============================================ */
.prefooter-cta {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
}

.prefooter-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-dark);
}

.prefooter-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.5;
}

.prefooter-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
}

.prefooter-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
}

.prefooter-glow-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    left: -100px;
    background: var(--primary-500);
    opacity: 0.3;
}

.prefooter-glow-2 {
    width: 300px;
    height: 300px;
    bottom: -50px;
    right: -50px;
    background: var(--secondary-500);
    opacity: 0.3;
}

.prefooter-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.prefooter-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-6);
}

.prefooter-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}

.prefooter-description {
    font-size: var(--text-lg);
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.prefooter-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-10);
}

.btn-prefooter {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.btn-prefooter-primary {
    background: white;
    color: var(--gray-900);
    box-shadow: var(--shadow-lg);
}

.btn-prefooter-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    color: var(--gray-900);
}

.btn-prefooter-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-prefooter-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
    color: white;
}

.prefooter-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
}

.prefooter-stat {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255,255,255,0.7);
    font-size: var(--text-sm);
}

.prefooter-stat i {
    color: var(--accent-400);
}

.prefooter-stat strong {
    color: white;
}

/* ============================================
   FOOTER
============================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-top {
    padding: var(--space-16) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr) 1.2fr;
    gap: var(--space-8);
}

/* Footer Brand */
.footer-brand-col {
    padding-right: var(--space-8);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.footer-logo-icon svg {
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.3));
}

.footer-logo-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 800;
}

.footer-logo-text .edu {
    color: white;
}

.footer-logo-text .pro {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-description {
    font-size: var(--text-sm);
    line-height: 1.7;
    color: var(--gray-400);
    margin-bottom: var(--space-6);
}

/* Footer Newsletter */
.footer-newsletter {
    padding: var(--space-5);
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-xl);
}

.footer-newsletter-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-3);
}

.newsletter-form {
    margin-bottom: 0;
}

.newsletter-input-group {
    display: flex;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.newsletter-input-group input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    outline: none;
    color: white;
    font-size: var(--text-sm);
}

.newsletter-input-group input::placeholder {
    color: var(--gray-500);
}

.newsletter-input-group button {
    padding: var(--space-3) var(--space-4);
    background: var(--primary-500);
    border: none;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.newsletter-input-group button:hover {
    background: var(--primary-600);
}

.newsletter-hint {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    color: var(--gray-500);
}

/* Footer Links */
.footer-links-col {
    padding-top: var(--space-2);
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--gray-400);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: white;
    transform: translateX(4px);
}

.footer-links a i {
    font-size: 0.625rem;
    transition: transform var(--transition-fast);
}

.footer-links a:hover i {
    transform: translateX(2px);
}

/* Footer Contact */
.footer-contact-col {
    padding-top: var(--space-2);
}

.footer-contact-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-6) 0;
}

.footer-contact-list li {
    margin-bottom: var(--space-3);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.footer-contact-item:hover {
    background: rgba(255,255,255,0.1);
}

.footer-contact-item.whatsapp:hover {
    background: rgba(37, 211, 102, 0.2);
}

.footer-contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    color: var(--primary-400);
}

.footer-contact-item.whatsapp .footer-contact-icon {
    color: #25D366;
}

.footer-contact-text {
    display: flex;
    flex-direction: column;
}

.footer-contact-text small {
    font-size: var(--text-xs);
    color: var(--gray-500);
}

.footer-contact-text span {
    font-size: var(--text-sm);
    color: white;
}

/* Footer Social */
.footer-social {
    margin-top: var(--space-4);
}

.footer-social-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-social-links {
    display: flex;
    gap: var(--space-2);
}

.footer-social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    color: var(--gray-400);
    font-size: var(--text-lg);
    transition: all var(--transition-fast);
}

.footer-social-link:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
}

/* Footer Bottom */
.footer-bottom {
    padding: var(--space-6) 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-copyright p {
    font-size: var(--text-sm);
    margin: 0;
}

.footer-copyright strong {
    color: white;
}

.footer-badges {
    display: flex;
    gap: var(--space-4);
}

.footer-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    color: var(--gray-400);
}

.footer-badge i {
    color: var(--success-500);
}

.footer-credits p {
    font-size: var(--text-sm);
    margin: 0;
}

.footer-credits a {
    color: var(--primary-400);
    font-weight: 600;
}

.footer-credits a:hover {
    color: var(--primary-300);
}

.heart-icon {
    display: inline-block;
    color: #EF4444;
    animation: heartbeat 1s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ============================================
   WHATSAPP FLOAT
============================================ */
.whatsapp-float {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-fixed);
}

.whatsapp-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: var(--radius-full);
    color: white;
    font-size: 28px;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    position: relative;
    transition: all var(--transition-base);
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
    color: white;
}

.whatsapp-pulse {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: #25D366;
    animation: whatsappPulse 2s infinite;
}

.whatsapp-pulse:nth-child(2) {
    animation-delay: 1s;
}

@keyframes whatsappPulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

.whatsapp-btn i {
    position: relative;
    z-index: 1;
}

.whatsapp-tooltip {
    position: absolute;
    right: calc(100% + var(--space-3));
    top: 50%;
    transform: translateY(-50%);
    padding: var(--space-3) var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.whatsapp-float.show-tooltip .whatsapp-tooltip {
    opacity: 1;
    visibility: visible;
}

.whatsapp-tooltip::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: white;
}

.whatsapp-tooltip-text {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-900);
}

.whatsapp-tooltip-sub {
    display: block;
    font-size: var(--text-xs);
    color: var(--gray-500);
}

/* ============================================
   BACK TO TOP
============================================ */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: calc(var(--space-6) + 76px);
    width: 46px;
    height: 46px;
    background: white;
    border: none;
    border-radius: var(--radius-full);
    color: var(--gray-700);
    font-size: var(--text-lg);
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
}

.back-to-top-progress {
    position: absolute;
    inset: 0;
    transform: rotate(-90deg);
}

.back-to-top-progress .progress-bg {
    stroke: var(--gray-200);
}

.back-to-top-progress .progress-bar {
    stroke: var(--primary-500);
    stroke-dasharray: 125.6;
    stroke-dashoffset: 125.6;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
}

/* ============================================
   RESPONSIVE STYLES
============================================ */
@media (max-width: 1199px) {
    .mega-menu-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .mega-promo {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
    
    .footer-brand-col {
        grid-column: span 3;
        padding-right: 0;
        margin-bottom: var(--space-6);
    }
    
    .footer-contact-col {
        grid-column: span 3;
        margin-top: var(--space-4);
    }
    
    .footer-contact-list {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-3);
    }
    
    .footer-contact-list li {
        margin-bottom: 0;
    }
    
    .footer-social {
        display: flex;
        align-items: center;
        gap: var(--space-4);
        margin-top: var(--space-4);
    }
    
    .footer-social-title {
        margin-bottom: 0;
    }
}

@media (max-width: 991px) {
    body.has-announcement {
        padding-top: 44px;
    }
    
    .announcement-bar {
        height: 44px;
    }
    
    body.has-announcement .header {
        top: 44px;
    }
    
    .navbar-collapse {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        padding: 80px var(--space-6) var(--space-6);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .navbar-collapse.show {
        transform: translateX(0);
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        padding: var(--space-4);
        font-size: var(--text-lg);
        border-bottom: 1px solid var(--gray-100);
    }
    
    .mega-dropdown .dropdown-toggle::after {
        display: none;
    }
    
    .mega-menu {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        padding: 0;
        margin: 0;
        background: var(--gray-50);
    }
    
    .mega-menu-inner {
        padding: var(--space-4);
    }
    
    .mega-menu-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .mega-section {
        padding-right: 0;
        border-right: none;
    }
    
    .mega-featured {
        display: none;
    }
    
    .navbar-actions {
        position: fixed;
        top: 16px;
        right: 70px;
        z-index: calc(var(--z-sticky) + 1);
    }
    
    .auth-buttons {
        flex-direction: column;
        position: absolute;
        bottom: var(--space-6);
        left: var(--space-6);
        right: var(--space-6);
    }
    
    .btn-auth {
        justify-content: center;
    }
    
    .user-dropdown {
        position: fixed;
        top: 12px;
        right: 70px;
    }
    
    .prefooter-title {
        font-size: var(--text-3xl);
    }
    
    .prefooter-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-prefooter {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .prefooter-stats {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand-col {
        grid-column: span 2;
    }
    
    .footer-contact-col {
        grid-column: span 2;
    }
}

@media (max-width: 767px) {
    .announcement-badge span {
        display: none;
    }
    
    .flash-container {
        left: var(--space-4);
        right: var(--space-4);
    }
    
    .flash-message {
        min-width: auto;
        max-width: none;
    }
    
    .prefooter-cta {
        padding: var(--space-16) 0;
    }
    
    .prefooter-title {
        font-size: var(--text-2xl);
    }
    
    .prefooter-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand-col,
    .footer-links-col,
    .footer-contact-col {
        grid-column: span 1;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
    
    .whatsapp-float {
        bottom: var(--space-4);
        right: var(--space-4);
    }
    
    .whatsapp-btn {
        width: 54px;
        height: 54px;
        font-size: 24px;
    }
    
    .whatsapp-tooltip {
        display: none;
    }
    
    .back-to-top {
        right: calc(var(--space-4) + 66px);
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 575px) {
    .announcement-cta span {
        display: none;
    }
    
    .announcement-cta {
        padding: var(--space-2);
        border-radius: var(--radius-md);
    }
    
    .search-modal-footer {
        display: none;
    }
}