/* ========== Landing Page ========== */
.landing {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Hero */
.landing-hero {
    text-align: center;
    padding: var(--space-12) 0 var(--space-8);
}

.landing-hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-6);
    line-height: 1.6;
}

.landing-hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
}

/* Stats */
.landing-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-6) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-8);
}

.landing-stat {
    text-align: center;
}

.landing-stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.landing-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Features */
.landing-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-10);
}

.landing-feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    text-align: center;
}

.landing-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--color-primary-lightest);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.landing-feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.landing-feature-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Section Title */
.landing-section-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

/* Course Catalog Preview */
.landing-catalog {
    margin-bottom: var(--space-10);
}

.landing-catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-5);
}

.landing-course-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.landing-course-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
    letter-spacing: -0.01em;
}

.landing-course-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0 0 var(--space-4);
}

.landing-syllabus {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-3);
}

.landing-syllabus li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-1) 0;
    font-size: 0.8125rem;
}

.landing-syllabus-title {
    color: var(--color-text);
    font-weight: 500;
}

.landing-syllabus-count {
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.landing-syllabus-more {
    color: var(--color-text-muted);
    font-style: italic;
    padding-top: var(--space-1);
}

/* Bottom CTA */
.landing-cta {
    text-align: center;
    padding: var(--space-10) 0;
    border-top: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.landing-cta h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-5);
    letter-spacing: -0.02em;
}

.landing-google-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition);
}

.landing-google-btn:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-gray-300);
    background: var(--color-gray-50);
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 768px) {
    .landing-hero {
        padding: var(--space-8) 0 var(--space-6);
    }

    .landing-stats {
        gap: var(--space-5);
    }

    .landing-stat-number {
        font-size: 1.5rem;
    }

    .landing-features {
        grid-template-columns: 1fr;
    }

    .landing-catalog-grid {
        grid-template-columns: 1fr;
    }
}