/* Navbar Styles */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    width: 24px;
    height: 24px;
    color: var(--accent);
    animation: pulse 2s ease-in-out infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link svg {
    width: 18px;
    height: 18px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--accent);
}

.nav-link.quiz-link {
    background: linear-gradient(135deg, var(--accent), var(--gradient-end));
    color: white;
    border: none;
}

.nav-link.quiz-link:hover {
    background: linear-gradient(135deg, var(--accent-secondary), var(--gradient-end));
    transform: translateY(-1px);
}

/* Theme Toggle */
.theme-toggle {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }