:root {
    --bg: #050505;
    --card: rgba(255, 255, 255, 0.05);
    --text: #ffffff;
    --muted: #a0a0a0;
    --accent: #f72585;
    --accent-glow: rgba(247, 37, 133, 0.5);
    --secondary: #4cc9f0;
    --secondary-glow: rgba(76, 201, 240, 0.5);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-main: 'Outfit', 'Inter', -apple-system, sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(247, 37, 133, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(76, 201, 240, 0.05) 0%, transparent 40%);
}

.container {
    max-width: 600px;
    width: 90%;
    text-align: center;
    padding: 40px 20px;
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

header p {
    color: var(--muted);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.main-card {
    background: var(--card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 30px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.main-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

#webcam-container {
    width: 100%;
    aspect-ratio: 1/1;
    max-width: 350px;
    margin: 0 auto 24px;
    border-radius: 18px;
    overflow: hidden;
    background: #000;
    position: relative;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.8);
    display: none;
}

#webcam-container canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover;
}

.placeholder-ui {
    padding: 40px 0;
}

.icon-box {
    font-size: 4rem;
    margin-bottom: 20px;
    animation: floating 3s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.btn-start {
    background: var(--text);
    color: var(--bg);
    border: none;
    padding: 16px 32px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.btn-start:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    background: var(--secondary);
    color: var(--text);
}

.btn-start:active {
    transform: scale(0.98);
}

#label-container {
    display: grid;
    gap: 16px;
    margin-top: 20px;
}

.prediction-bar {
    text-align: left;
}

.label-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 6px;
    font-weight: 600;
}

.bar-bg {
    height: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 99px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    border-radius: 99px;
    transition: width 0.4s ease-out;
    box-shadow: 0 0 15px var(--accent-glow);
}

.loading-spinner {
    display: none;
    margin: 20px auto;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

footer {
    margin-top: 40px;
    color: var(--muted);
    font-size: 0.85rem;
}