:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #6366f1;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-light: #1e293b;
    --text-light: #f8fafc;
    --text-dim: #94a3b8;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --container-width: 1100px;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-darker);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header & Nav */
header {
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(2, 6, 23, 0.8);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.05em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-item {
    text-decoration: none;
    color: var(--text-dim);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-item:hover {
    color: var(--text-light);
}

/* Sections Base */
section {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 2.5rem;
    margin: 1rem 0;
    font-weight: 800;
}

.section-header p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

.section-dark {
    background-color: var(--bg-darker);
}

.section-light {
    background: radial-gradient(circle at 50% 10%, #1e293b 0%, #020617 100%);
    position: relative;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.6rem;
    border-radius: 0.6rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(14, 165, 233, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--text-light);
    background: rgba(14, 165, 233, 0.05);
}

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    background: radial-gradient(circle at 10% 10%, #1e293b 0%, #020617 100%);
    border-bottom: 1px solid var(--glass-border);
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(ellipse at 50% 50%, rgba(99, 102, 241, 0.15), transparent 60%);
    pointer-events: none;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-dim);
    max-width: 650px;
    margin-bottom: 3rem;
}

/* Grid System */
.grid {
    display: grid;
    gap: 2rem;
}

.teaser-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

@media (max-width: 900px) {
    .teaser-grid {
        grid-template-columns: 1fr;
    }
}

.plugin-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

/* Cards */
.card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 1.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    border-color: rgba(14, 165, 233, 0.4);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-4px);
}

.teaser-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    margin-top: 0.5rem;
}

.teaser-card p {
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.card-actions {
    display: flex;
    gap: 1rem;
}

/* Zello Features */
.zello-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    transition: all 0.3s;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glass-border);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.feature-card p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

/* Image Placeholders */
.img-placeholder {
    width: 100%;
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border: 1px dashed var(--glass-border);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.wide-placeholder {
    aspect-ratio: 21/9;
}

/* Filters */
.filters {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    padding: 0.5rem 1.2rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Utils */
.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hidden {
    display: none !important;
}

footer {
    padding: 5rem 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
}