/* ===========================
   AIRBNB LANDING PAGE CSS
   Mobile-first, responsive design
   =========================== */

/* ===== CSS Variables (Theme) ===== */
:root {
    --color-bg: #ffffff;
    --color-fg: #222222;
    --color-primary: #202020;
    --color-accent: #FF5A5F;
    --color-light-bg: #f8f8f8;
    --color-border: #d8d8d8;
    --color-light-text: #686868;

    --font-display: "Circular", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-body: "Circular", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);

    --transition: all 0.3s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-fg);
    line-height: 1.6;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent);
}

button {
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

input, select, textarea {
    font-family: var(--font-body);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 16px;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(255, 90, 95, 0.1);
}

/* ===== Container ===== */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ===== Header ===== */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-accent);
}

.logo {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-family: var(--font-display);
}

.nav-menu {
    display: none;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-primary);
}

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

.menu-toggle {
    background: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Tablet and up */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }

    .menu-toggle {
        display: none;
    }

    .header-container {
        padding: var(--spacing-md);
    }
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--color-light-bg) 0%, rgba(248, 248, 248, 0.5) 100%);
    padding: var(--spacing-3xl) var(--spacing-md);
    text-align: center;
    animation: fadeIn 0.8s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-size: 36px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-light-text);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.5;
}

.search-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.search-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.search-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: left;
}

.search-field label {
    font-weight: 600;
    font-size: 14px;
    color: var(--color-primary);
}

.search-field input,
.search-field select {
    padding: 12px var(--spacing-md);
    font-size: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    min-height: 48px;
}

.search-button {
    background-color: var(--color-accent);
    color: white;
    padding: 14px var(--spacing-xl);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-md);
    min-height: 48px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.search-button:hover {
    background-color: #e94c52;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Tablet: search inputs inline */
@media (min-width: 768px) {
    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .search-input-group {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr;
        gap: var(--spacing-md);
    }

    .search-form {
        flex-direction: row;
        align-items: flex-end;
        gap: var(--spacing-md);
    }

    .search-form button {
        flex: 0 0 auto;
        min-width: 140px;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .hero {
        padding: var(--spacing-3xl) var(--spacing-md);
    }

    .search-card {
        max-width: 800px;
        padding: var(--spacing-2xl);
    }
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section-intro {
    font-size: 16px;
    color: var(--color-light-text);
}

@media (min-width: 768px) {
    .section-header h2 {
        font-size: 36px;
    }
}

/* ===== Destinations Section ===== */
.destinations {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-bg);
}

.destinations-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.destination-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

.destination-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.destination-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.destination-card h3 {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
    font-size: 18px;
    color: var(--color-primary);
}

.destination-card p {
    padding: 0 var(--spacing-md) var(--spacing-lg);
    color: var(--color-light-text);
    font-size: 14px;
}

.see-all-link {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    padding: var(--spacing-md) 0;
    border-bottom: 2px solid var(--color-accent);
}

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

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

    .destination-card img {
        height: 250px;
    }
}

/* ===== Featured Locations ===== */
.featured-locations {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-light-bg);
}

.location-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.location-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.location-image {
    width: 100%;
    height: 150px;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.location-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.location-card:hover .location-image img {
    transform: scale(1.05);
}

.location-card h3 {
    padding: var(--spacing-md) 0;
    font-size: 18px;
    color: var(--color-primary);
}

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

    .location-image {
        height: 200px;
    }
}

/* ===== Experiences Section ===== */
.experiences {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-bg);
}

.experiences-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.experience-card {
    background-color: var(--color-light-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.experience-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.experience-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.experience-card h3 {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
    font-size: 18px;
    color: var(--color-primary);
}

.experience-card p {
    padding: 0 var(--spacing-md) var(--spacing-lg);
    color: var(--color-light-text);
    font-size: 14px;
}

.explore-link {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    padding: var(--spacing-md) 0;
    border-bottom: 2px solid var(--color-accent);
}

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

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

    .experience-card img {
        height: 220px;
    }
}

/* ===== How It Works Section ===== */
.how-it-works {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-light-bg);
}

.how-it-works h2 {
    text-align: center;
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-2xl);
}

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.step {
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background-color: var(--color-accent);
    color: white;
    border-radius: 50%;
    line-height: 50px;
    font-weight: 700;
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.step h3 {
    font-size: 20px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.step p {
    color: var(--color-light-text);
    margin-bottom: var(--spacing-md);
}

.step img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

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

    .how-it-works h2 {
        font-size: 36px;
    }

    .step img {
        height: 200px;
    }
}

/* ===== Trust & Safety Section ===== */
.trust-safety {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-bg);
}

.trust-safety h2 {
    text-align: center;
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-2xl);
}

.trust-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.trust-item {
    text-align: center;
}

.trust-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.trust-item h3 {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.trust-item p {
    color: var(--color-light-text);
}

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

    .trust-safety h2 {
        font-size: 36px;
    }
}

/* ===== Guest Favorites Section ===== */
.guest-favorites {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-light-bg);
}

.favorites-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.favorite-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

.favorite-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.favorite-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.favorite-card h3 {
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-sm);
    font-size: 16px;
    color: var(--color-primary);
}

.favorite-card p {
    padding: 0 var(--spacing-md) var(--spacing-lg);
    color: var(--color-light-text);
    font-size: 14px;
}

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

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

    .favorite-card img {
        height: 220px;
    }
}

/* ===== Inspiration Section ===== */
.inspiration {
    padding: var(--spacing-3xl) var(--spacing-md);
    background-color: var(--color-bg);
}

.inspiration h2 {
    text-align: center;
    font-size: 28px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-2xl);
}

.inspiration-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.inspiration-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 150px;
    cursor: pointer;
    transition: var(--transition);
}

.inspiration-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.inspiration-card h3 {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    color: white;
    padding: var(--spacing-lg);
    background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    font-size: 16px;
}

.inspiration-card:hover img {
    transform: scale(1.05);
}

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

    .inspiration h2 {
        font-size: 36px;
    }

    .inspiration-card {
        height: 200px;
    }
}

@media (min-width: 1024px) {
    .inspiration-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .inspiration-card {
        height: 250px;
    }
}

/* ===== Hosting Section ===== */
.hosting {
    padding: var(--spacing-3xl) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-light-bg) 100%);
    color: white;
    text-align: center;
}

.hosting-content {
    max-width: 600px;
}

.hosting h2 {
    font-size: 28px;
    color: white;
    margin-bottom: var(--spacing-md);
}

.hosting p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: 12px var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 16px;
    min-height: 48px;
    line-height: 24px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.cta-button:hover {
    background-color: #e94c52;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

@media (min-width: 768px) {
    .hosting h2 {
        font-size: 36px;
    }
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-column h4 {
    color: white;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.footer-column a:hover {
    color: var(--color-accent);
}

.language-selector select {
    background-color: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 14px;
    cursor: pointer;
}

.language-selector select:hover,
.language-selector select:focus {
    border-color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-bottom a:hover {
    color: var(--color-accent);
}

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

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

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .footer,
    .search-card {
        display: none;
    }
}