/* Landing Page Styles */

.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--background);
    color: var(--text-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Header */
.landing-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

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

.logo h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    transition: color var(--transition-normal);
}

.header-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    transition: color var(--transition-normal);
}

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

.btn-login {
    padding: 0.5rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

[data-theme="dark"] .landing-header {
    background: #1a1a1a;
    border-bottom-color: #333333;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .btn-login {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

[data-theme="dark"] .btn-login:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.6);
}

/* Hero Section */
.hero-section {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: background var(--transition-normal);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    transition: color var(--transition-normal);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.hero-image {
    animation: fadeInRight 0.8s ease-out;
}

.chat-preview {
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.chat-preview-header {
    height: 60px;
    background: var(--primary-color);
    opacity: 0.8;
}

.chat-preview-messages {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.preview-message {
    display: flex;
    gap: 0.5rem;
}

.preview-message.own {
    flex-direction: row-reverse;
}

.preview-bubble {
    padding: 0.75rem 1rem;
    background: var(--background);
    border-radius: 12px;
    max-width: 70%;
    border: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.preview-message.own .preview-bubble {
    background: var(--primary-color);
    color: white;
    border: none;
}

[data-theme="dark"] .chat-preview {
    background: #1a1a1a;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .preview-bubble {
    background: #252525;
    border-color: #404040;
}

/* Features Section */
.features-section {
    background: var(--surface);
    padding: 4rem 0;
    transition: background-color var(--transition-normal);
}

.section-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin: 0 0 3rem 0;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--background);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-normal), background-color var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin: 0 0 0.5rem 0;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.feature-card p {
    color: var(--text-secondary);
    margin: 0;
    transition: color var(--transition-normal);
}

[data-theme="dark"] .features-section {
    background: #1a1a1a;
}

[data-theme="dark"] .feature-card {
    background: #252525;
    border-color: #404040;
}

[data-theme="dark"] .feature-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    border-color: #667eea;
}

/* About Section */
.about-section {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0 0 1.5rem 0;
    transition: color var(--transition-normal);
}

.about-text h3 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem 0;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.about-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.about-list li {
    padding: 0.75rem 0;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

/* CTA Section */
.cta-section {
    background: var(--surface);
    padding: 4rem 0;
    text-align: center;
    transition: background-color var(--transition-normal);
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    transition: color var(--transition-normal);
}

[data-theme="dark"] .cta-section {
    background: #1a1a1a;
}

/* Footer */
.landing-footer {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: auto;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

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

.footer-content p {
    margin: 0;
    color: var(--text-secondary);
    transition: color var(--transition-normal);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

[data-theme="dark"] .landing-footer {
    background: #1a1a1a;
    border-top-color: #333333;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .header-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}