:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #3b5bfd;
  --primary-hover: #2c46d1;
  --border: #e2e4ea;
  --error: #d1394a;
  --success: #1f9d55;
  --warning-bg: #fff8e6;
  --warning-text: #8a6d1a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 480px;
  background: var(--card-bg);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.tab {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--text);
}

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

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
  margin-top: 16px;
}

textarea,
input[type="password"],
input[type="text"],
input[type="file"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

.panel.hidden {
  display: none;
}

.hidden {
  display: none;
}

.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
  font-size: 0.8rem;
  padding: 8px 10px;
  border-radius: 8px;
  margin-top: 10px;
}

.primary-btn {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn:hover {
  background: var(--primary-hover);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secondary-btn {
  margin-top: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  cursor: pointer;
  font-size: 0.85rem;
}

.status {
  min-height: 20px;
  margin-top: 14px;
  font-size: 0.9rem;
  text-align: center;
}

.status.error {
  color: var(--error);
}

.status.success {
  color: var(--success);
}

.countdown {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 17, 23, 0.55);
  padding: 24px;
  z-index: 10;
}

.overlay.hidden {
  display: none;
}

.modal-card {
  max-width: 360px;
}