:root {
    /* Brand Colors */
    --clr-primary: #6366f1;
    --clr-primary-light: #818cf8;
    --clr-primary-dark: #4f46e5;
    --clr-primary-soft: rgba(99, 102, 241, 0.15);
    
    /* Surface Colors - Dark Glass Theme */
    --clr-bg: #0b0f19;
    --clr-surface-glass: rgba(17, 24, 39, 0.7);
    --clr-surface-glass-hover: rgba(31, 41, 55, 0.8);
    --clr-surface-border: rgba(255, 255, 255, 0.1);
    
    /* Text Colors */
    --clr-text-main: #f9fafb;
    --clr-text-muted: #9ca3af;
    
    /* Forms */
    --clr-input-bg: rgba(17, 24, 39, 0.8);
    
    /* Utilities */
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-glass: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --box-blur: blur(8px);
    --transition-smooth: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body[data-theme='light'] {
    --clr-primary: #7c3aed;
    --clr-primary-light: #8b5cf6;
    --clr-primary-dark: #6d28d9;
    --clr-primary-soft: rgba(124, 58, 237, 0.12);
    --clr-bg: #f7f3ec;
    --clr-surface-glass: rgba(255, 255, 255, 0.84);
    --clr-surface-glass-hover: rgba(255, 255, 255, 0.96);
    --clr-surface-border: rgba(18, 21, 28, 0.09);
    --clr-text-main: #12151c;
    --clr-text-muted: #5a6375;
    --clr-input-bg: rgba(255, 255, 255, 0.92);
}

body[data-theme='light'] .main-nav a,
body[data-theme='light'] .theme-toggle,
body[data-theme='light'] .nav-toggle {
    background: rgba(255, 255, 255, 0.86);
    border-color: rgba(18, 21, 28, 0.12);
    color: var(--clr-text-main);
}

body[data-theme='light'] .main-nav a:hover,
body[data-theme='light'] .main-nav a.active,
body[data-theme='light'] .theme-toggle:hover,
body[data-theme='light'] .nav-toggle:hover {
    background: rgba(124, 58, 237, 0.08);
    border-color: rgba(124, 58, 237, 0.18);
}

body[data-theme='light'] .main-nav {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(18, 21, 28, 0.1);
    box-shadow: 0 30px 80px rgba(18, 21, 28, 0.16);
}

body[data-theme='light'] .nav-backdrop {
    background: rgba(18, 21, 28, 0.18);
}

body[data-theme='light'] .main-nav .btn-outline {
    background: rgba(124, 58, 237, 0.06);
}

body[data-theme='light'] .hero-section p,
body[data-theme='light'] .customer-info {
    color: var(--clr-text-muted);
}

body[data-theme='light'] .hero-section,
body[data-theme='light'] .search-layout,
body[data-theme='light'] .detail-view,
body[data-theme='light'] .booking-card,
body[data-theme='light'] .filters-sidebar {
    color: var(--clr-text-main);
}

body[data-theme='light'] .search-card,
body[data-theme='light'] .booking-card,
body[data-theme='light'] .filters-sidebar,
body[data-theme='light'] .detail-content,
body[data-theme='light'] .amenity-tag,
body[data-theme='light'] .customer-info {
    border-color: rgba(18, 21, 28, 0.1);
}

body[data-theme='light'] .booking-card,
body[data-theme='light'] .filters-sidebar,
body[data-theme='light'] .search-card,
body[data-theme='light'] .detail-content {
    box-shadow: 0 26px 70px rgba(18, 21, 28, 0.08);
}

body[data-theme='light'] .booking-card,
body[data-theme='light'] .filters-sidebar,
body[data-theme='light'] .search-card {
    background: rgba(255, 255, 255, 0.9);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--clr-bg);
    background-image: 
        radial-gradient(circle at 0% 0%, var(--clr-primary-soft) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, color-mix(in srgb, var(--clr-primary) 24%, transparent) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--clr-text-main);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    position: relative;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span {
    color: var(--clr-primary);
    font-weight: 500;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.main-nav a:hover, .main-nav a.active {
    color: var(--clr-text-main);
}

.main-nav .btn-outline {
    border: 1px solid var(--clr-surface-border);
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.03);
}

.main-nav .btn-outline:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.2);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 0.6rem;
    border: 1px solid var(--clr-surface-border);
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    color: var(--clr-text-main);
    min-height: 44px;
    padding: 0.55rem 0.85rem;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.theme-toggle {
    appearance: none;
    border: 1px solid var(--clr-surface-border);
    background: rgba(255,255,255,0.04);
    color: var(--clr-text-main);
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.1);
}

.nav-toggle__icon {
    width: 1rem;
    height: 1rem;
    display: inline-block;
    position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after,
.nav-toggle__icon {
    background: currentColor;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
}

.nav-toggle__icon::before { top: 1px; }
.nav-toggle__icon::after { bottom: 1px; }

.nav-backdrop {
    display: none;
}

.hero-section {
    padding: 2rem 0 4rem;
    text-align: center;
}

.hero-section h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero-section h1 span {
    background: linear-gradient(135deg, var(--clr-primary-light), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 1.125rem;
    color: var(--clr-text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.search-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    margin-top: 2rem;
    text-align: left;
}

.filters-sidebar {
    background: var(--clr-surface-glass);
    padding: 2rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--clr-surface-border);
    height: fit-content;
}

.filter-group { margin-bottom: 2rem; }
.filter-group h4 { margin-bottom: 1rem; color: var(--clr-text-main); font-size: 0.9rem; text-transform: uppercase; }

.checkbox-group { display: flex; flex-direction: column; gap: 0.75rem; }
.checkbox-group label { display: flex; align-items: center; gap: 0.75rem; color: var(--clr-text-muted); cursor: pointer; }
.checkbox-group input { width: 1.2rem; height: 1.2rem; border-radius: 4px; border: 1px solid var(--clr-surface-border); background: var(--clr-input-bg); }

/* Property Detail View */
.detail-view { text-align: left; animation: fadeIn 0.4s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.detail-gallery {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1rem;
    height: 500px;
    margin-bottom: 3rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.main-img { background-size: cover; background-position: center; }
.side-imgs { display: grid; grid-template-rows: 1fr 1fr; gap: 1rem; }
.side-img { background-size: cover; background-position: center; }

.detail-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
}

.property-info h2 { font-size: 3rem; margin-bottom: 1.5rem; }
.property-info p { font-size: 1.1rem; color: var(--clr-text-muted); margin-bottom: 2rem; line-height: 1.8; }

.amenities-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; }
.amenity-tag { display: flex; align-items: center; gap: 0.5rem; background: var(--clr-surface-glass); padding: 0.75rem 1.25rem; border-radius: var(--radius-sm); font-weight: 500; }

.booking-card {
    background: var(--clr-surface-glass);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--clr-surface-border);
    position: sticky;
    top: 2rem;
    box-shadow: var(--shadow-glass);
    backdrop-filter: var(--box-blur);
}

.price-total { font-size: 2.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.btn-book { width: 100%; background: var(--clr-primary); color: white; border: none; padding: 1.25rem; border-radius: var(--radius-md); font-size: 1.1rem; font-weight: 700; cursor: pointer; transition: var(--transition-smooth); }
.btn-book:hover { background: var(--clr-primary-dark); transform: translateY(-2px); }


.hero-section h1 span {
    background: linear-gradient(135deg, var(--clr-primary-light), #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 1.25rem;
    color: var(--clr-text-muted);
    max-width: 580px;
    margin: 0 auto 5rem;
}

.customer-info {
    background: color-mix(in srgb, var(--clr-primary) 12%, transparent);
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid color-mix(in srgb, var(--clr-primary) 24%, transparent);
    font-size: 0.9rem;
}

@media (max-width: 860px) {
    .app-container {
        padding: 0 1rem;
    }

    .app-header {
        padding: 1.25rem 0 1rem;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .main-nav {
        position: fixed;
        top: calc(env(safe-area-inset-top, 0px) + 0.75rem);
        right: 0.75rem;
        bottom: 0.75rem;
        width: min(82vw, 320px);
        padding: 1rem;
        border-radius: 24px;
        background: rgba(9, 13, 22, 0.98);
        border: 1px solid var(--clr-surface-border);
        box-shadow: 0 30px 80px rgba(0,0,0,0.45);
        backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        transform: translateX(calc(100% + 1rem));
        transition: transform 0.24s ease;
        z-index: 70;
    }

    .app-header.nav-open .main-nav {
        transform: translateX(0);
    }

    .main-nav a {
        padding: 0.85rem 0.95rem;
        border-radius: 14px;
        background: rgba(255,255,255,0.03);
    }

    .main-nav .btn-outline {
        text-align: center;
    }

    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(5, 7, 14, 0.56);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
        z-index: 60;
    }

    .app-header.nav-open .nav-backdrop,
    body.nav-open .nav-backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    .search-layout,
    .detail-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-section {
        padding-bottom: 2.5rem;
    }

    .hero-section h1 {
        font-size: clamp(2.5rem, 11vw, 3.4rem);
    }
}