:root {
    --bg-color: #020617;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-buy: #10b981;
    --accent-sell: #f43f5e;
    --accent-hold: #64748b;
    --glow-buy: rgba(16, 185, 129, 0.2);
    --glow-sell: rgba(244, 63, 94, 0.2);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(30, 58, 138, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, rgba(88, 28, 135, 0.15) 0%, transparent 50%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 4rem 1.5rem;
}

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

header {
    text-align: left;
    margin-bottom: 4rem;
    border-left: 4px solid var(--accent-buy);
    padding-left: 1.5rem;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2.5rem;
    margin-bottom: 4rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-glow {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes priceUpdate {
    0% { background: rgba(255, 255, 255, 0); }
    50% { background: rgba(255, 255, 255, 0.05); }
    100% { background: rgba(255, 255, 255, 0); }
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.6s ease-out forwards;
}

#btc-card { animation-delay: 0.2s; }

.price-container.updating {
    animation: priceUpdate 0.4s ease-out;
    border-radius: 0.5rem;
}

.signal::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse-glow 2s infinite ease-in-out;
}


.signal.buy { color: var(--accent-buy); }
.signal.buy::before { background: var(--accent-buy); box-shadow: 0 0 10px var(--accent-buy); }

.signal.sell { color: var(--accent-sell); }
.signal.sell::before { background: var(--accent-sell); box-shadow: 0 0 10px var(--accent-sell); }

.signal.hold { color: var(--accent-hold); }
.signal.hold::before { background: var(--accent-hold); }

footer {
    text-align: left;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
}

@media (max-width: 640px) {
    h1 { font-size: 2.5rem; }
    .grid { grid-template-columns: 1fr; }
    .price { font-size: 2.75rem; }
}