:root {
    --primary-color: #2ecc71;
    --primary-dark: #27ae60;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f9f9f9;
    --white: #ffffff;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.main-header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.logo i {
    font-size: 1.5rem;
}

nav {
    display: flex;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    color: var(--white);
    padding: 4rem 0 6rem;
    text-align: center;
    border-radius: 0 0 50% 50% / 20px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.search-container {
    background: var(--white);
    max-width: 600px;
    margin: 0 auto;
    border-radius: 50px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.search-container i {
    color: var(--text-light);
    margin-right: 10px;
}

.search-container input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 1rem;
    padding: 5px;
}

/* Content Area */
.content-area {
    margin-top: -30px;
    padding-bottom: 50px;
}

/* Filters */
.filters {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.filter-btn {
    background: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.video-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.thumbnail-container {
    position: relative;
    padding-top: 56.25%;
    /* 16:9 Aspect Ratio */
    background-color: #000;
}

.thumbnail-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: var(--transition);
}

.video-card:hover .thumbnail-container img {
    opacity: 1;
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 3rem;
    opacity: 0.8;
    transition: var(--transition);
}

.video-card:hover .play-icon {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 1;
}

.card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.tag {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.card-content h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 15px;
    flex-grow: 1;
}

.duration {
    font-size: 0.8rem;
    color: #999;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal-content {
    background: var(--white);
    width: 90%;
    max-width: 800px;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.close-modal:hover {
    background: rgba(0, 0, 0, 0.8);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 */
    height: 0;
    background: #000;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.modal-info {
    padding: 20px;
}

.modal-info h3 {
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .filters {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 10px;
    }

    .filter-btn {
        white-space: nowrap;
    }
}