/**
 * 기초영어공부 - study.soritune.com
 * Main Stylesheet - Cosmic Dark Theme
 *
 * 주식회사 소리튠 - 소리 튜닝 영어 학습 플랫폼
 */

/* ==========================================
 * CSS VARIABLES
 * ========================================== */
:root {
    /* Primary Colors - Cosmic Purple */
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --primary-dark: #5849C4;
    --primary-rgb: 108, 92, 231;

    /* Secondary Colors */
    --secondary: #00CEC9;
    --secondary-light: #81ECEC;
    --secondary-dark: #00A8A5;

    /* Accent - LeetCode Orange */
    --accent: #FF6F00;
    --accent-light: #FF9E40;
    --accent-dark: #E65100;
    --accent-rgb: 255, 111, 0;

    /* Background - Deep Space */
    --bg-primary: #0A0A1A;
    --bg-secondary: #12122A;
    --bg-tertiary: #1A1A3A;
    --bg-card: rgba(26, 26, 58, 0.8);
    --bg-glass: rgba(10, 10, 26, 0.85);

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #B8B8D0;
    --text-muted: #6B6B8D;
    --text-dark: #1A1A3A;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    --gradient-cosmic: linear-gradient(135deg, #0A0A1A 0%, #1A1A3A 50%, #2A1A4A 100%);
    --gradient-hero: linear-gradient(180deg, rgba(108, 92, 231, 0.3) 0%, rgba(10, 10, 26, 0) 50%);

    /* Glow Effects */
    --glow-primary: 0 0 20px rgba(108, 92, 231, 0.5);
    --glow-accent: 0 0 20px rgba(255, 111, 0, 0.5);
    --glow-secondary: 0 0 20px rgba(0, 206, 201, 0.5);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Border */
    --border-color: rgba(108, 92, 231, 0.2);
    --border-light: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-english: 'Poppins', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 300;
    --z-overlay: 400;
    --z-tooltip: 500;

    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;

    /* Header */
    --header-height: 80px;
}

/* ==========================================
 * RESET & BASE STYLES
 * ========================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================
 * LOADING SCREEN
 * ========================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
}

.sound-wave-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 60px;
    margin-bottom: var(--spacing-lg);
}

.sound-wave-loader span {
    width: 6px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    animation: soundWave 1s ease-in-out infinite;
}

.sound-wave-loader span:nth-child(1) { animation-delay: 0s; }
.sound-wave-loader span:nth-child(2) { animation-delay: 0.1s; }
.sound-wave-loader span:nth-child(3) { animation-delay: 0.2s; }
.sound-wave-loader span:nth-child(4) { animation-delay: 0.3s; }
.sound-wave-loader span:nth-child(5) { animation-delay: 0.4s; }

@keyframes soundWave {
    0%, 100% {
        height: 20px;
    }
    50% {
        height: 50px;
    }
}

.loading-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    letter-spacing: 2px;
}

/* ==========================================
 * ANTIGRAVITY EFFECTS CONTAINER
 * ========================================== */
.antigravity-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.effect-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.aura-glow-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ==========================================
 * CONTAINER
 * ========================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ==========================================
 * HEADER
 * ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 10, 26, 0.95);
    box-shadow: var(--shadow-lg);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-family: var(--font-english);
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.nav-link:hover,
.nav-item.active .nav-link {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.1);
}

.nav-link i {
    font-size: 0.7em;
    transition: transform var(--transition-base);
}

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

.nav-highlight {
    background: var(--gradient-accent) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-lg) !important;
}

.nav-highlight:hover {
    box-shadow: var(--glow-accent);
    transform: translateY(-2px);
}

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.nav-item.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.dropdown-menu li a:hover {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.1);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ==========================================
 * BUTTONS
 * ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--glow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(108, 92, 231, 0.6);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--text-primary);
    box-shadow: var(--glow-accent);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(255, 111, 0, 0.6);
}

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

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.1);
    border-color: var(--primary);
}

.btn-white {
    background: var(--text-primary);
    color: var(--text-dark);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-primary);
}

.btn-block {
    width: 100%;
}

/* ==========================================
 * MOBILE MENU
 * ========================================== */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 24px;
}

.hamburger span {
    display: block;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.mobile-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100%;
    background: var(--bg-secondary);
    z-index: var(--z-modal);
    transition: right var(--transition-base);
    display: flex;
    flex-direction: column;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
}

.mobile-nav-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
}

.mobile-nav-menu {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.mobile-nav-menu ul {
    list-style: none;
}

.mobile-nav-menu li a {
    display: block;
    padding: var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.mobile-nav-menu li a:hover,
.mobile-nav-menu li a.active {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.1);
}

.mobile-nav-footer {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    border-top: 1px solid var(--border-light);
}

.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    visibility: hidden;
    z-index: calc(var(--z-modal) - 1);
    transition: all var(--transition-base);
}

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

/* ==========================================
 * MAIN CONTENT
 * ========================================== */
.main-content {
    padding-top: var(--header-height);
    min-height: 100vh;
    position: relative;
    z-index: 2;
}

/* ==========================================
 * HERO SECTION
 * ========================================== */
.hero {
    position: relative;
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(108, 92, 231, 0.2);
    border: 1px solid var(--primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--primary-light);
    margin-bottom: var(--spacing-lg);
    animation: fadeInDown 0.8s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title .accent {
    color: var(--accent);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
    animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-stat {
    text-align: center;
}

.hero-stat-number {
    font-family: var(--font-english);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-light);
}

.hero-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Hero Image/Visual */
.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    max-width: 600px;
    opacity: 0.8;
}

/* ==========================================
 * SLIDER / CAROUSEL
 * ========================================== */
.slider-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.slider-wrapper {
    display: flex;
    transition: transform 0.5s ease;
}

.slide {
    flex: 0 0 100%;
    position: relative;
}

.slide-image {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-2xl);
    background: linear-gradient(transparent, rgba(10, 10, 26, 0.9));
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.slide-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.slide-description {
    color: var(--text-secondary);
}

/* Slider Navigation */
.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 10;
}

.slider-nav:hover {
    background: var(--primary);
    border-color: var(--primary);
}

.slider-prev { left: var(--spacing-lg); }
.slider-next { right: var(--spacing-lg); }

/* Slider Pagination */
.slider-pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.slider-dot {
    width: 10px;
    height: 10px;
    background: var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-base);
}

.slider-dot.active {
    background: var(--primary);
    width: 30px;
    border-radius: var(--radius-full);
}

/* ==========================================
 * SECTIONS
 * ========================================== */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(108, 92, 231, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* Background Variations */
.bg-gradient {
    background: var(--gradient-cosmic);
}

.bg-dark {
    background: var(--bg-secondary);
}

/* ==========================================
 * CARDS
 * ========================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary);
}

.card-image {
    position: relative;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Course Cards */
.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary);
}

.course-image {
    position: relative;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-badges {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
}

.badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-visual {
    background: rgba(108, 92, 231, 0.9);
    color: var(--text-primary);
}

.badge-auditory {
    background: rgba(0, 206, 201, 0.9);
    color: var(--text-primary);
}

.badge-kinesthetic {
    background: rgba(255, 111, 0, 0.9);
    color: var(--text-primary);
}

.badge-level {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.badge-new {
    background: var(--accent);
    color: var(--text-primary);
}

.course-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 26, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.course-card:hover .course-overlay {
    opacity: 1;
}

.course-content {
    padding: var(--spacing-lg);
}

.course-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.course-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.course-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.meta-item i {
    color: var(--primary-light);
}

.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.course-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--accent);
}

.course-rating .rating-count {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.course-price {
    text-align: right;
}

.price-original {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-decoration: line-through;
}

.price-sale {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--accent);
}

/* ==========================================
 * GRID LAYOUTS
 * ========================================== */
.grid-cols-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.grid-cols-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.grid-cols-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

/* ==========================================
 * PAGE HEADERS
 * ========================================== */
.page-header {
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    text-align: center;
    background: var(--gradient-hero);
    position: relative;
}

.page-header-content {
    position: relative;
    z-index: 2;
}

.page-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(108, 92, 231, 0.2);
    border: 1px solid var(--primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: var(--spacing-md);
}

.page-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================
 * FILTER BAR
 * ========================================== */
.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.filter-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-primary);
}

.filter-sort select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* ==========================================
 * BLOG / NEWS
 * ========================================== */
.blog-categories {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.category-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.category-btn:hover,
.category-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-primary);
}

/* Featured Post */
.featured-post {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.featured-post:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.featured-image {
    position: relative;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--accent);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.featured-content {
    padding: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.post-category {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(108, 92, 231, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--primary-light);
}

.post-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.featured-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.featured-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.featured-title a:hover {
    color: var(--primary-light);
}

.featured-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Blog Card */
.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card);
    border-color: var(--primary);
}

.blog-image {
    position: relative;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-image img {
    transform: scale(1.05);
}

.blog-category {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    color: var(--text-primary);
}

.blog-content {
    padding: var(--spacing-lg);
}

.blog-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.blog-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.blog-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.blog-title a:hover {
    color: var(--primary-light);
}

.blog-excerpt {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-light);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
}

.read-more:hover {
    color: var(--accent);
}

.read-more i {
    transition: transform var(--transition-base);
}

.read-more:hover i {
    transform: translateX(5px);
}

/* ==========================================
 * PAGINATION
 * ========================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination-btn,
.pagination-num {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
}

.pagination-btn:hover:not(:disabled),
.pagination-num:hover,
.pagination-num.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-dots {
    color: var(--text-muted);
}

/* ==========================================
 * NEWSLETTER
 * ========================================== */
.section-newsletter {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.newsletter-icon {
    font-size: 3rem;
    color: var(--primary-light);
    margin-bottom: var(--spacing-lg);
}

.newsletter-content h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.newsletter-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.newsletter-form {
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.newsletter-input-group input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.newsletter-input-group input::placeholder {
    color: var(--text-muted);
}

.newsletter-input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ==========================================
 * CTA BANNER
 * ========================================== */
.section-cta-banner {
    padding: var(--spacing-2xl) 0;
}

.cta-banner-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
}

.cta-text h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.cta-text p {
    color: var(--text-secondary);
}

/* ==========================================
 * FOOTER
 * ========================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding-top: var(--spacing-3xl);
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--border-light);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.footer-logo img {
    height: 36px;
}

.footer-logo span {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-primary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-col h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-base);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
}

.footer-contact h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.contact-info {
    list-style: none;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.contact-info li i {
    color: var(--primary-light);
    margin-top: 3px;
}

.contact-info li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.contact-info li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-company {
    margin-bottom: var(--spacing-sm);
}

.footer-company p {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.footer-legal a {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ==========================================
 * BACK TO TOP
 * ========================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-sticky);
    box-shadow: var(--glow-primary);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 30px rgba(108, 92, 231, 0.6);
}

/* ==========================================
 * ANIMATIONS
 * ========================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 40px rgba(108, 92, 231, 0.8);
    }
}

/* Animation Classes */
.animate-fadeIn { animation: fadeIn 0.6s ease both; }
.animate-fadeInUp { animation: fadeInUp 0.6s ease both; }
.animate-fadeInDown { animation: fadeInDown 0.6s ease both; }
.animate-slideInLeft { animation: slideInLeft 0.6s ease both; }
.animate-slideInRight { animation: slideInRight 0.6s ease both; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-glow { animation: glow 2s ease-in-out infinite; }

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* Scroll Animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* ==========================================
 * UTILITY CLASSES
 * ========================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-accent { color: var(--accent) !important; }
.text-muted { color: var(--text-muted) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-sm) !important; }
.mt-2 { margin-top: var(--spacing-md) !important; }
.mt-3 { margin-top: var(--spacing-lg) !important; }
.mt-4 { margin-top: var(--spacing-xl) !important; }
.mt-5 { margin-top: var(--spacing-2xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-sm) !important; }
.mb-2 { margin-bottom: var(--spacing-md) !important; }
.mb-3 { margin-bottom: var(--spacing-lg) !important; }
.mb-4 { margin-bottom: var(--spacing-xl) !important; }
.mb-5 { margin-bottom: var(--spacing-2xl) !important; }

.hidden { display: none !important; }
.visible { visibility: visible !important; }

/* ==========================================
 * RESPONSIVE DESIGN
 * ========================================== */
@media (max-width: 1200px) {
    .grid-cols-4 {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 992px) {
    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-visual {
        display: none;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .featured-post {
        grid-template-columns: 1fr;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .header-actions .btn {
        display: none;
    }

    .header-actions .mobile-menu-toggle {
        display: block;
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .filter-bar {
        flex-direction: column;
    }

    .filter-tabs {
        width: 100%;
        justify-content: center;
    }

    .cta-banner-content {
        flex-direction: column;
        text-align: center;
    }

    .newsletter-input-group {
        flex-direction: column;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-title {
        font-size: var(--font-size-3xl);
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-actions {
        flex-direction: column;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}