/* BerryBell - Modern Minimal Design System */
:root {
    --primary: #FF0000; /* YouTube Red */
    --accent: #FFD700; /* Berry/Gold accent */
    --text-main: #2D3436;
    --text-muted: #636E72;
    --bg-main: #FFFFFF;
    --bg-alt: #F9FAFB;
    --card-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-main);
    overflow-x: hidden;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 80px 0;
}

/* Typography */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 800;
}

h1 { font-size: 3.5rem; letter-spacing: -2px; }
h2 { font-size: 2.5rem; margin-bottom: 2rem; text-align: center; }

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 100%);
    padding-top: 100px;
}

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

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin: 1.5rem 0 2.5rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.4);
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.video-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.thumbnail-container {
    position: relative;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: var(--bg-alt);
}

.thumbnail-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-info {
    padding: 1.5rem;
}

.video-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* About Section */
.about {
    background: var(--bg-alt);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* Footer */
footer {
    padding: 60px 0;
    background: white;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-links a {
    color: var(--text-muted);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary);
}

/* Utilities */
.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}

.lazy-load.loaded {
    opacity: 1;
}

[data-placeholder] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}