:root {
    /* Premium Dark Theme */
    --bg-main: #0F1115;
    --glass-bg: rgba(25, 28, 35, 0.7);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-hover: rgba(35, 39, 48, 0.85);
    
    --primary: #A78BFA;
    --primary-light: #C4B5FD;
    --success: #34D399;
    --warning: #FBBF24;
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --font-main: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(167, 139, 250, 0.05), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(52, 211, 153, 0.03), transparent 25%);
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.15); }

.hidden { display: none !important; }

.app-container {
    width: 100%;
    max-width: 900px;
    padding: 3rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

/* Header */
.app-header {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Glassmorphism utility */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

/* Upload Zone */
.upload-zone {
    position: relative;
    padding: 4rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    overflow: hidden;
}

.upload-zone:hover {
    background: var(--glass-hover);
    border-color: rgba(167, 139, 250, 0.3);
}

.upload-zone.dragover {
    background: rgba(167, 139, 250, 0.1);
    border-color: var(--primary);
    transform: scale(1.02);
}

.hidden-input {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 10;
}

.upload-content {
    text-align: center;
    color: var(--text-secondary);
    transition: transform 0.3s;
}

.upload-zone.dragover .upload-content {
    transform: translateY(-5px);
    color: var(--primary);
}

.upload-content svg {
    margin-bottom: 1rem;
}

.upload-content h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

/* Results Section */
.results-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    animation: slideUp 0.4s ease-out forwards;
}

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

.file-summary {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
}

.file-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.file-info-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    word-break: break-all;
}

.file-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    background: rgba(167, 139, 250, 0.15);
    color: var(--primary-light);
    letter-spacing: 0.05em;
}

/* File Preview */
.file-preview-container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(0,0,0,0.2);
}

.file-preview-container img,
.file-preview-container canvas {
    max-width: 100%;
    max-height: 400px;
    border-radius: 8px;
    object-fit: contain;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

/* Metadata Grid */
.metadata-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.meta-card {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    transition: transform 0.2s;
}

.meta-card:hover {
    transform: translateY(-3px);
    background: var(--glass-hover);
}

.meta-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
}

.meta-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-word;
}

.meta-card.highlight .meta-value {
    color: var(--primary-light);
}

.meta-card.success .meta-value {
    color: var(--success);
}

/* Map Button */
.map-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: rgba(52, 211, 153, 0.15);
    color: var(--success);
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s;
}

.map-link:hover {
    background: rgba(52, 211, 153, 0.25);
}