:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --card-bg: #1e293b;
    --border-radius: 12px;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.countdown-container {
    text-align: center;
    padding: 2rem;
}

.countdown-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.countdown-grid {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.time-block {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    min-width: 120px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.time-value {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-color);
    font-variant-numeric: tabular-nums; /* Evita saltos de ancho en los números */
}

.time-label {
    display: block;
    font-size: 0.875rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    letter-spacing: 0.1em;
}

.hidden {
    display: none;
}

#completion-message {
    margin-top: 2rem;
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: bold;
}