:root {
    --bg-color: #0F0F11;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --gold: #D4AF37;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

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

/* Abstract Background */
.background-pattern {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.1), transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 4rem;
    padding-top: 2rem;
}

.logo {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--gold);
    margin-bottom: 1rem;
    font-weight: 600;
}

h1 {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #aaa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Upload Section */
.upload-section {
    max-width: 600px;
    margin: 0 auto 4rem;
}

.upload-box {
    border: 2px dashed var(--card-border);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
}

.upload-box:hover, .upload-box.dragover {
    border-color: var(--gold);
    background: rgba(212, 175, 55, 0.05);
}

.upload-box .icon {
    color: var(--gold);
    margin-bottom: 1rem;
}

.upload-box h3 {
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.upload-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.preview-container {
    position: relative;
    max-width: 300px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.preview-container img {
    width: 100%;
    display: block;
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.6);
    border: none;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.2s;
}

.close-btn:hover {
    background: rgba(0,0,0,0.8);
}

.hidden {
    display: none !important;
}

/* Results Grid */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 1rem;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-weight: 400;
    font-size: 2rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    border-color: rgba(212, 175, 55, 0.3);
}

.card-img-wrapper {
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
}

.card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.card-info {
    padding: 1rem;
}

.card-title {
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.similarity-bar-bg {
    height: 4px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.similarity-bar-fill {
    height: 100%;
    background: var(--gold);
    border-radius: 2px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.score {
    color: var(--gold);
    font-weight: 600;
}

/* Loader */
.loader {
    width: 24px;
    height: 24px;
    border: 2px solid var(--card-border);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
}