:root {
    --primary: #00d1ff;
    --secondary: #0072ff;
    --bg-dark: #0f172a;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-light: #f8fafc;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, sans-serif;
}

body {
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
.bg-animated {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(45deg, #0f172a, #1e293b, #0f172a);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Glassmorphism utility */
.glass {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: 0.3s;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: 0.3s;
}

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

.auth-btns a {
    padding: 0.6rem 1.5rem;
    border-radius: 10px;
    margin-left: 1rem;
    transition: 0.3s;
}

.btn-signup {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: white !important;
    box-shadow: 0 4px 15px rgba(0, 209, 255, 0.3);
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 209, 255, 0.5);
}

/* Hero Section */
.hero {
    padding: 5rem 5% 10rem;
    text-align: center;
    animation: fadeIn 1s ease-out;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

/* Search Tabs */
.search-container {
    max-width: 1000px;
    margin: -5rem auto 0;
    position: relative;
}

.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: -1px;
}

.tab-btn {
    padding: 1rem 2rem;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    color: white;
    cursor: pointer;
    border-radius: 15px 15px 0 0;
    transition: 0.3s;
}

.tab-btn.active {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-bottom: none;
    font-weight: 600;
}

.search-form {
    padding: 2.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    align-items: end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: left;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    opacity: 0.8;
}

.form-group input, .form-group select {
    padding: 0.8rem;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: rgba(255,255,255,0.05);
    color: white;
    outline: none;
}

.btn-search {
    grid-column: span 1;
    padding: 1rem;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.btn-search:hover {
    transform: scale(1.05);
}

/* Grid Layouts */
.section-title {
    margin: 4rem 5% 2rem;
    font-size: 2rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 5% 4rem;
}

.card {
    padding: 1.5rem;
    transition: 0.4s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    background: rgba(255,255,255,0.15);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 15px;
    margin-bottom: 1rem;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Auth Pages */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.auth-form {
    width: 100%;
    max-width: 450px;
    padding: 3rem;
}

.auth-form h2 {
    text-align: center;
    margin-bottom: 2rem;
}

/* Loading animation */
.loader {
    width: 48px;
    height: 48px;
    border: 5px solid #FFF;
    border-bottom-color: var(--primary);
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .search-form { grid-template-columns: 1fr; }
    nav { padding: 1rem; }
    .nav-links { display: none; }
}