/* Landing Page Styles */

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--surface-0);
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px);
}

[data-theme="dark"] .landing-nav {
    background: rgba(12, 13, 17, 0.88);
}

.landing-nav-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.landing-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.landing-nav-actions {
    display: flex;
    gap: 8px;
}

/* Hero */
.landing-hero {
    max-width: 700px;
    margin: 0 auto;
    padding: 140px 24px 80px;
    text-align: center;
}

.landing-hero h1 {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.landing-hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-sub {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 16px;
}

.hero-note {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* Sections */
.landing-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 24px;
}

.landing-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 40px;
}

/* Steps Grid */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.step-card {
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
}

.step-card-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-subtle);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.step-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-item {
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.feature-item h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Footer */
.landing-footer {
    text-align: center;
    padding: 40px 24px;
    color: var(--text-disabled);
    font-size: 13px;
    border-top: 1px solid var(--border-subtle);
}

/* Auth Modal */
.auth-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.auth-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.auth-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 400px;
    max-width: 90vw;
    background: var(--surface-0);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    z-index: 301;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: var(--shadow-modal);
}

.auth-modal.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.auth-modal .close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 20px;
    cursor: pointer;
}

.auth-modal .close-btn:hover {
    color: var(--text-primary);
}

.auth-form h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.auth-switch {
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 16px;
}

.auth-switch a {
    color: var(--accent);
    text-decoration: none;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .landing-hero h1 {
        font-size: 32px;
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .landing-hero {
        padding-top: 100px;
    }
}