:root {
    --bg-dark: #0f172a;
    --bg-mesh: radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
               radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
               radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    overflow-x: hidden;
}

.background-mesh {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: var(--bg-mesh);
    z-index: -1;
    opacity: 0.8;
}

.container {
    max-width: 1000px;
    width: 100%;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

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

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
    }
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.video-container {
    width: 100%;
    aspect-ratio: 4/3;
    background-color: #000;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    margin-bottom: 1rem;
}

#webcam {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1); /* Mirror effect */
}

/* Scanning Animation */
.scanning-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    border: 2px solid var(--success);
    border-radius: 8px;
}

.scanning-overlay.hidden {
    display: none;
}

.scan-line {
    width: 100%;
    height: 3px;
    background: var(--success);
    box-shadow: 0 0 10px var(--success), 0 0 20px var(--success);
    position: absolute;
    animation: scan 2s infinite linear;
}

@keyframes scan {
    0% { top: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.scan-text {
    position: absolute;
    bottom: 10px;
    width: 100%;
    text-align: center;
    color: var(--success);
    font-weight: 600;
    text-shadow: 0 0 5px #000;
}

.controls {
    display: flex;
    justify-content: center;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.primary-btn { background: var(--accent); color: white; }
.primary-btn:hover:not(:disabled) { background: var(--accent-hover); }

.success-btn { background: var(--success); color: white; }
.success-btn:hover:not(:disabled) { background: var(--success-hover); }

.danger-btn { background: var(--danger); color: white; }
.danger-btn:hover:not(:disabled) { background: var(--danger-hover); }

.hidden { display: none !important; }

/* Tabs */
.tab-headers {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab-btn {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}

.tab-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-pane h2 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.tab-pane p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.input-group {
    margin-bottom: 1.25rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.input-group input:focus {
    border-color: var(--accent);
}

.result-box {
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-height: 80px;
    border-left: 4px solid var(--glass-border);
}

.result-box.success {
    border-left-color: var(--success);
    color: white;
}

.result-box.error {
    border-left-color: var(--danger);
    color: white;
}

/* Server Wake-Up Status Banner */
.server-status {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #1e40af, #3b82f6);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    z-index: 1000;
    font-size: 0.9rem;
    font-weight: 500;
    animation: slideDown 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.server-status.error {
    background: linear-gradient(135deg, #991b1b, #ef4444);
}

.server-status.hidden {
    display: none !important;
}

.status-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: translateY(0); }
}