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

:root {
    /* Color Palette */
    --primary: #66FCF1;
    --primary-dark: #45A29E;
    --bg-deep: #0B0C10;
    --bg-card: #1F2833;
    --text-main: #C5C6C7;
    --text-bright: #FFFFFF;
    --accent-gradient: linear-gradient(135deg, #66FCF1 0%, #45A29E 100%);
    
    /* Spacing & Sizing */
    --container-width: 1200px;
    --section-padding: 100px 20px;
    --border-radius: 12px;
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .brand-logo {
    font-family: 'Outfit', sans-serif;
    color: var(--text-bright);
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

ul {
    list-style: none;
}

/* --- Layout Components --- */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: var(--section-padding);
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--bg-deep);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(102, 252, 241, 0.3);
}

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

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

/* --- Header --- */

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-smooth);
}

header.scrolled {
    background: rgba(11, 12, 16, 0.85);
    backdrop-filter: blur(15px);
    padding: 12px 0;
    border-bottom: 1px solid rgba(102, 252, 241, 0.1);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--primary);
}

/* --- Hero Section --- */

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(rgba(11, 12, 16, 0.7), rgba(11, 12, 16, 0.9)), 
                url('hero.png') center/cover no-repeat;
    margin-bottom: 0;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 1s ease forwards;
}

.hero h1 span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s forwards;
    opacity: 0;
}

.hero-btns {
    display: flex;
    gap: 20px;
    animation: fadeInUp 1s ease 0.4s forwards;
    opacity: 0;
}

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

/* --- Content Styling --- */

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section-title .divider {
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 0 auto;
}

/* Presentation Section */
.presentation {
    background-color: var(--bg-deep);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

/* Theme Cards */
.themes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.theme-card {
    background: var(--bg-card);
    padding: 160px 40px 40px; /* Padding for background images */
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
    background-size: cover;
    background-position: center;
}

.theme-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to bottom, rgba(31, 40, 51, 0.4) 0%, rgba(31, 40, 51, 0.95) 100%);
    z-index: 1;
}

.theme-card > * {
    position: relative;
    z-index: 2;
}

.theme-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.theme-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 15px;
    display: block;
}

/* Long Content Editorial */
.editorial-content {
    background: #161B22;
    padding: 100px 0;
}

.editorial-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.editorial-wrapper h3 {
    font-size: 2rem;
    margin: 40px 0 20px;
    color: var(--primary);
}

.editorial-wrapper p {
    margin-bottom: 24px;
    font-size: 1.1rem;
    opacity: 0.85;
}

/* Stats Section */
.stats-bar {
    display: flex;
    justify-content: space-around;
    background: var(--bg-card);
    padding: 60px;
    border-radius: var(--border-radius);
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    color: var(--primary);
}

/* FAQ */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    padding: 20px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 30px;
    opacity: 0.8;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 30px 20px;
}

/* Footer */
footer {
    padding: 80px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 991px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 3.5rem;
    }
    .stats-bar {
        flex-direction: column;
        gap: 40px;
    }
}