/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    outline: none;
    gap: var(--space-2);
}

.btn-primary {
    background: var(--gradient-accent);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.7);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--accent-primary);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: var(--gradient-accent);
    transition: all var(--transition-normal);
    z-index: -1;
}

.btn-outline:hover::before {
    width: 100%;
}

.btn-outline:hover {
    border-color: transparent;
    color: #fff;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: var(--z-sticky);
    padding: var(--space-4) 0;
    transition: all var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    background: var(--bg-tertiary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-2) 0;
}

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

.logo {
    font-size: var(--text-xl);
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background: var(--gradient-accent);
    transition: width var(--transition-fast);
}

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

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    font-size: var(--text-2xl);
    color: var(--text-primary);
    cursor: pointer;
    background: none;
    border: none;
}

/* Cards */
.card {
    --text-primary: var(--card-text-primary);
    --text-secondary: var(--card-text-secondary);
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(255, 255, 255, 0.06), transparent 40%);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
    z-index: 1;
}

.card:hover::before {
    opacity: 1;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    /* Navigation Overlay */
    .nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        z-index: 98;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

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

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right var(--transition-normal);
        border-left: 1px solid var(--border-color);
        z-index: 99;
    }

    .nav-links.nav-active {
        right: 0;
    }

    .mobile-toggle {
        display: block;
        z-index: 100;
    }
}