:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
}

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

body {
  font-family: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 520px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

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

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.35rem;
}

/* Center countdown */
.countdown-section {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
}

.countdown-wrap {
  text-align: center;
  width: 100%;
}

.countdown-label {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.countdown-display {
  font-size: 3.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--success);
  line-height: 1.1;
}

.countdown-display.warning {
  color: var(--warning);
}

.countdown-display.danger {
  color: var(--danger);
}

.countdown-meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.75rem;
}

.empty-hint,
.expired-banner {
  text-align: center;
  color: var(--muted);
}

.expired-banner span {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--danger);
  margin-bottom: 0.35rem;
}

.upload-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.upload-card label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--muted);
}

.upload-card label + textarea,
.upload-card label + input {
  margin-bottom: 1.1rem;
}

textarea,
input[type="number"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.65rem 0.75rem;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

textarea:focus,
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

button[type="submit"] {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

button[type="submit"]:hover {
  background: var(--accent-hover);
}

button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-message {
  margin-top: 0.85rem;
  font-size: 0.85rem;
  text-align: center;
}

.form-message.success {
  color: var(--success);
}

.form-message.error {
  color: var(--danger);
}

footer {
  margin-top: 2rem;
  text-align: center;
}

footer p {
  font-size: 0.75rem;
  color: var(--muted);
}

footer code {
  background: var(--surface);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
}