/* Guizhou Congjiang Tour - CSS Styles */

:root {
    --green-primary: #166534;
    --green-dark: #14532d;
    --gold: #d97706;
    --earth: #92400e;
    --gray-100: #f3f4f6;
    --gray-400: #9ca3af;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-900: #111827;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--green-primary);
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 2rem;
    }
}

.nav-links a {
    color: var(--gray-700);
    text-decoration: none;
    transition: color 0.2s;
}

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

.lang-switch {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--green-primary);
    border: 1px solid var(--green-primary);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.2s;
}

.lang-switch:hover {
    background: var(--green-primary);
    color: white;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.7));
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    padding: 1rem;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out;
}

@media (min-width: 768px) {
    .hero-content h1 {
        font-size: 4.5rem;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.hero-dates {
    font-size: 1.125rem;
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 2rem;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--gold);
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--earth);
    transform: scale(1.05);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Video Section */
.video-section {
    padding: 4rem 0;
    background: var(--gray-900);
}

.video-section video {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    display: block;
    border-radius: 0.5rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

/* Itinerary Section */
.itinerary {
    padding: 5rem 0;
    background: white;
}

.itinerary h2,
.features h2,
.gallery h2,
.signup h2,
.contact h2 {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    text-align: center;
    margin-bottom: 3rem;
}

.itinerary-grid {
    display: grid;
    gap: 2rem;
}

@media (min-width: 768px) {
    .itinerary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.itinerary-card {
    background: linear-gradient(135deg, #f0fdf4, #fffbeb);
    border-radius: 1rem;
    padding: 2rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.itinerary-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.day-badge {
    display: inline-block;
    background: var(--green-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.itinerary-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.itinerary-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--green-primary), var(--green-dark));
}

.features h2 {
    color: white;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-card {
    text-align: center;
}

.feature-icon {
    display: flex;
    width: 4rem;
    height: 4rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.75rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: #bbf7d0;
}

/* Gallery Section */
.gallery {
    padding: 5rem 0;
    background: var(--gray-100);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.gallery-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 0.5rem;
    transition: transform 0.3s;
}

.gallery-item:hover {
    transform: scale(1.02);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Signup Section */
.signup {
    padding: 5rem 0;
    background: white;
}

.price-tag {
    text-align: center;
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 2rem;
}

.signup-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--green-primary);
    box-shadow: 0 0 0 3px rgba(22, 101, 52, 0.1);
}

.form-message {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: none;
}

.form-message.success {
    display: block;
    background: #dcfce7;
    color: #166534;
}

.form-message.error {
    display: block;
    background: #fee2e2;
    color: #dc2626;
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background: var(--green-primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: var(--green-dark);
}

.btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
    background: var(--gray-900);
    color: white;
}

.contact h2 {
    color: white;
    margin-bottom: 2rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

@media (min-width: 768px) {
    .contact-items {
        flex-direction: row;
        justify-content: center;
    }
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-label {
    font-size: 0.875rem;
    color: var(--gray-400);
}

.contact-value {
    font-weight: 600;
}

.contact-grid {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 800px;
        margin: 0 auto 2rem;
    }
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: left;
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--gold);
}

.contact-card p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

@media (min-width: 768px) {
    .social-links {
        flex-direction: row;
        justify-content: center;
    }
}

/* Footer */
.footer {
    padding: 2rem 0;
    background: black;
    color: var(--gray-400);
    text-align: center;
}