/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.logo {
    font-size: 15px;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--tracking-normal);
    color: var(--color-text);
}

.logo-light {
    font-weight: var(--font-weight-regular);
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.nav-link {
    font-size: 12px;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--border-radius-pill);
    font-size: 14px;
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--tracking-normal);
    transition: all var(--transition-normal);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #FFFFFF;
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.btn-link {
    color: var(--color-primary);
    padding: 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.btn-link:hover {
    text-decoration: none;
    opacity: 0.8;
}

/* Cards */
.card {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border-subtle);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border);
    background-color: #111;
}

/* Hero */
.hero {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-sm) var(--spacing-lg);
}

.hero-title {
    font-size: clamp(2rem, 8vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--tracking-tighter);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    color: var(--color-text);
    max-width: 100%;
    word-wrap: break-word;
}

.hero-subtitle {
    font-size: clamp(1rem, 4vw, var(--font-size-xl));
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.4;
    letter-spacing: var(--tracking-tight);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border-subtle);
    font-size: 13px;
    color: var(--color-text-muted);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Tablet and up */
@media (min-width: 768px) {
    .logo {
        font-size: 18px;
    }

    .nav-link {
        font-size: 13px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 15px;
    }

    .hero {
        min-height: 80vh;
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        text-align: left;
    }

    .footer-links {
        justify-content: flex-end;
    }
}