/* Base Resets and Themes */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    scroll-behavior: smooth;
}

:root {
    --bg-color: #121214;
    --surface-color: #1e1e24;
    --primary-color: #ff003c; /* YouTube Accent Color */
    --text-main: #f5f5f7;
    --text-muted: #a0a0aa;
    --nav-bg: rgba(18, 18, 20, 0.9);
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.highlight {
    color: var(--primary-color);
}

/* Header & Navbar */
header {
    background-color: var(--nav-bg);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid #2a2a32;
    backdrop-filter: blur(8px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: 1px;
    border-left: 4px solid var(--primary-color);
    padding-left: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 10rem 0 6rem 0;
    background: linear-gradient(135deg, #18181c 0%, #0a0a0c 100%);
    text-align: center;
    border-bottom: 1px solid #2a2a32;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 2.5rem auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #d00030;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid #4a4a5a;
}

.btn-secondary:hover {
    border-color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

/* About Section */
.about-section {
    padding: 6rem 0;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    width: 50%;
    height: 4px;
    background-color: var(--primary-color);
    bottom: -10px;
    left: 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-top: 2rem;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.stat-card h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-card p {
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 0.3rem;
}

/* Expertise Section */
.expertise-section {
    background-color: #18181c;
    padding: 6rem 0;
    border-top: 1px solid #2a2a32;
    border-bottom: 1px solid #2a2a32;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-card {
    background-color: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.skill-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.skill-card p {
    color: var(--text-muted);
}

/* Videos Section */
.videos-section {
    padding: 6rem 0;
}

.section-subtitle {
    color: var(--text-muted);
    margin-top: -1.5rem;
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2.5rem;
}

.video-card {
    background-color: var(--surface-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.iframe-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
}

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

.video-info {
    padding: 1.5rem;
}

.video-info h3 {
    font-size: 1.15rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.video-info p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.center-btn {
    text-align: center;
    margin-top: 4rem;
}

/* Footer Section */
footer {
    background-color: #0a0a0c;
    padding: 4rem 0 2rem 0;
    border-top: 1px solid #2a2a32;
    text-align: center;
}

.footer-content h2 {
    margin-bottom: 1rem;
}

.footer-content h2::after {
    display: none;
}

.footer-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.social-links a {
    color: var(--text-main);
    font-size: 2rem;
    transition: color 0.3s ease;
}

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

.copyright {
    font-size: 0.9rem;
    color: #5a5a66;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--surface-color);
        border-bottom: 1px solid #2a2a32;
        padding: 1rem 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        margin: 1rem 0;
        text-align: center;
        width: 100%;
    }

    .menu-toggle {
        display: block;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }
}