:root {
    --bg-dark: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --safe: #10b981;
    --critical: #ef4444;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background animated orbs for dynamic design */
.background-orbs {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 400px; height: 400px;
    background: #3b82f6;
    top: -100px; left: -100px;
}

.orb-2 {
    width: 500px; height: 500px;
    background: #8b5cf6;
    bottom: -200px; right: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 300px; height: 300px;
    background: #06b6d4;
    top: 40%; left: 40%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Main Container (Glassmorphism) */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 90%;
    max-width: 900px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: 16px;
    padding: 60px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.02);
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

.upload-icon {
    color: var(--primary);
    margin-bottom: 15px;
}

.upload-area h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.browse-link {
    color: var(--primary);
    text-decoration: underline;
    font-weight: 600;
}

.hidden {
    display: none !important;
}

/* Loading State */
#loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Results Area */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.badge {
    padding: 8px 16px;
    border-radius: 999px;
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.badge.safe {
    background: rgba(16, 185, 129, 0.2);
    color: var(--safe);
    border: 1px solid var(--safe);
}

.badge.critical {
    background: rgba(239, 68, 68, 0.2);
    color: var(--critical);
    border: 1px solid var(--critical);
}

.metrics {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
}

.metric-card .label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.metric-card .value {
    font-size: 1.5rem;
    font-weight: 600;
}

.image-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.image-box h4 {
    margin-bottom: 10px;
    color: var(--text-muted);
}

.image-box img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-primary:hover {
    background: var(--primary-hover);
}