/* ======================================
   AIRBNB BRAND COLORS & TYPOGRAPHY
   ====================================== */

:root {
    /* Airbnb Palette from source-brand.json */
    --color-bg: #ffffff;
    --color-fg: #222222;
    --color-primary: #202020;
    --color-accent: #e00840;
    --color-accent-hover: #d8084e;
    --color-surface-light: #f8f8f8;
    --color-surface-medium: #f0f0f0;
    --color-text-muted: #686868;
    --color-border: #e8e8e8;

    /* Typography */
    --font-family: "Airbnb Cereal VF", Circular, -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif;
    --font-size-h1: 3.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    --font-size-body: 1rem;
    --font-size-small: 0.875rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

/* ======================================
   RESET & BASE STYLES
   ====================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-fg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

button {
    font-family: var(--font-family);
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

input, select {
    font-family: var(--font-family);
    font-size: 1rem;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-md);
}

/* ======================================
   HEADER / NAVIGATION
   ====================================== */

.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-wrapper {
    flex-shrink: 0;
}

.logo {
    height: 35px;
    width: auto;
}

.nav {
    flex-grow: 1;
    display: flex;
    gap: var(--spacing-xl);
    margin-left: var(--spacing-xl);
    justify-content: center;
}

.nav-link {
    font-weight: 500;
    color: var(--color-primary);
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease;
}

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

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.btn-help,
.btn-login {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    color: var(--color-primary);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
}

.btn-help:hover {
    background-color: var(--color-surface-light);
}

.btn-login {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.btn-login:hover {
    background-color: #000;
}

/* Responsive header */
@media (max-width: 768px) {
    .header-container {
        padding: var(--spacing-sm);
        flex-wrap: wrap;
    }

    .nav {
        margin-left: var(--spacing-md);
        gap: var(--spacing-md);
        font-size: var(--font-size-small);
    }

    .header-actions {
        gap: var(--spacing-sm);
    }

    .btn-help,
    .btn-login {
        padding: 0.5rem 0.75rem;
        font-size: var(--font-size-small);
    }
}

@media (max-width: 480px) {
    .nav {
        display: none;
    }

    .header-actions {
        width: 100%;
        gap: var(--spacing-sm);
    }
}

/* ======================================
   HERO SECTION
   ====================================== */

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(0, 0, 0, 0.1) 50%,
        rgba(0, 0, 0, 0.5) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1000px;
    padding: var(--spacing-lg);
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.hero-text-wrapper {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.hero-h1 {
    font-size: var(--font-size-h1);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.hero-subheading {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* ======================================
   TRUST INDICATORS
   ====================================== */

.trust-indicators {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-small);
    color: var(--color-primary);
}

.trust-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--color-accent);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: 0.75rem;
}

.trust-text {
    line-height: 1.4;
}

/* ======================================
   SEARCH FORM
   ====================================== */

.search-container {
    width: 100%;
}

.search-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)) auto;
    gap: var(--spacing-sm);
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    align-items: flex-end;
}

.search-field {
    display: flex;
    flex-direction: column;
}

.search-label {
    font-weight: 700;
    font-size: var(--font-size-small);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.search-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--color-fg);
    background-color: var(--color-bg);
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(224, 8, 64, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

/* ======================================
   PRIMARY SEARCH BUTTON (HIGHLY PROMINENT)
   ====================================== */

.btn-search-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-xxl);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.125rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    transform: scale(1);
}

.btn-search-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-hover) 0%, #c0063a 100%);
    box-shadow: var(--shadow-xl);
    transform: scale(1.05);
}

.btn-search-primary:active {
    transform: scale(0.98);
}

/* Responsive search form */
@media (max-width: 768px) {
    .search-form {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: var(--spacing-lg);
    }

    .btn-search-primary {
        width: 100%;
        padding: var(--spacing-md);
        font-size: 1rem;
    }

    .hero-text-wrapper {
        padding: var(--spacing-lg);
    }

    .hero-h1 {
        font-size: 2rem;
    }

    .hero-subheading {
        font-size: 1rem;
    }

    .trust-indicators {
        gap: var(--spacing-md);
    }

    .trust-item {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 500px;
    }

    .hero-content {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-sm);
    }

    .hero-text-wrapper {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    .hero-h1 {
        font-size: 1.5rem;
    }

    .hero-subheading {
        font-size: 0.9rem;
    }

    .trust-indicators {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--color-border);
    }

    .trust-item {
        font-size: 0.7rem;
    }

    .search-form {
        padding: var(--spacing-md);
    }

    .search-input {
        padding: 0.75rem var(--spacing-sm);
        font-size: 0.9rem;
    }
}

/* ======================================
   CONTENT SECTIONS
   ====================================== */

.section {
    padding: var(--spacing-xxl) var(--spacing-lg);
    background-color: var(--color-bg);
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section h2 {
    font-size: var(--font-size-h2);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
}

.section h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* ======================================
   DESTINATIONS SECTION
   ====================================== */

.destinations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.destination-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}

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

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

.destination-card h3 {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    font-size: 1.125rem;
    margin: 0;
}

.destination-card p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-text-muted);
    font-size: var(--font-size-small);
    margin: 0;
}

/* ======================================
   EXPERIENCES SECTION
   ====================================== */

.experiences {
    background-color: var(--color-surface-medium);
}

.experiences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.experience-card {
    position: relative;
    height: 300px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    cursor: pointer;
}

.experience-card:hover {
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.experience-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.experience-card:hover .experience-image {
    transform: scale(1.1);
}

.experience-card h3 {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    color: white;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, transparent 100%);
    margin: 0;
    font-size: 1.25rem;
}

/* ======================================
   BECOME A HOST SECTION
   ====================================== */

.become-host {
    background: linear-gradient(135deg, var(--color-primary) 0%, #404040 100%);
    color: white;
}

.become-host-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.become-host h2 {
    color: white;
    font-size: 2.5rem;
}

.become-host p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.btn-secondary {
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-md) var(--spacing-xxl);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--color-accent-hover);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

/* ======================================
   PARTNER LOGOS SECTION
   ====================================== */

.partner-logos {
    background-color: var(--color-surface-light);
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.partner-logo {
    height: 50px;
    width: auto;
    opacity: 0.7;
    transition: opacity 0.3s ease;
    filter: grayscale(100%);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* ======================================
   FOOTER
   ====================================== */

.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xxl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.footer-column a {
    display: block;
    color: #ccc;
    font-size: var(--font-size-small);
    padding: var(--spacing-xs) 0;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--font-size-small);
    color: #999;
}

/* Responsive footer */
@media (max-width: 768px) {
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .footer {
        padding: var(--spacing-xl) var(--spacing-md) var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .footer-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-column h4 {
        font-size: 0.9rem;
    }
}

/* ======================================
   MOBILE OPTIMIZATION
   ====================================== */

@media (max-width: 768px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.5rem;
        --font-size-h3: 1.25rem;
    }

    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .destinations-grid,
    .experiences-grid {
        gap: var(--spacing-md);
    }

    .destination-card,
    .experience-card {
        border-radius: var(--radius-md);
    }

    .become-host h2 {
        font-size: 1.75rem;
    }

    .become-host p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-h1: 1.5rem;
        --font-size-h2: 1.25rem;
        --spacing-xxl: 2rem;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .destinations-grid,
    .experiences-grid {
        grid-template-columns: 1fr;
    }

    .experience-card {
        height: 250px;
    }

    .destination-image {
        height: 150px;
    }
}

/* ======================================
   UTILITY CLASSES
   ====================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}