:root {
    --bg-color: #1a1a1a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent-color: #00bcd4; /* Cyan/Teal accent */
    --accent-hover: #00acc1;
    --font-main: 'Inter', sans-serif;
    --max-width: 900px;
    --border-radius: 12px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.main-header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--text-primary);
    text-decoration: none;
}

/* Dropdown */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #2a2a2a;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 8px;
    padding: 0.5rem 0;
    top: 100%;
    left: 0;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    color: var(--text-secondary);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
}

/* Content */
.content-wrapper {
    flex: 1;
    max-width: var(--max-width);
    margin: 2rem auto;
    padding: 0 1.5rem;
    width: 100%;
    box-sizing: border-box;
}

h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 0.5rem;
}

ul {
    padding-left: 1.2rem;
}

li {
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
}

img {
    max-width: 100%;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

iframe {
    max-width: 100%;
    border-radius: var(--border-radius);
}

/* Footer */
.main-footer {
    background: #111;
    padding: 2rem;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-secondary);
}

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

/* Responsive */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #1a1a1a;
        padding: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .dropdown-content {
        position: static;
        background: transparent;
        box-shadow: none;
        padding-left: 1rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}