:root {
  font-size: 14px;
  line-height: 1.4;
  font-weight: 400;
  font-family: "Inter", "Roboto", "Segoe UI", "Helvetica Neue", "Arial", system-ui, -apple-system,
    "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji";
  --bg: #f3f6fb;
  --fg: #0f172a;
  --muted: #64748b;
  --border: #dbe5f2;
  --card: #ffffff;
  --accent: #2f6fed;
  --card-soft: #ffffff;
  --surface-soft: #e9f0fb;
  --surface-hover: #f1f5fd;
  --tp-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
  --accent-soft: #e7efff;
  --success: #16a34a;
  --error-bg: #fef2f2;
  --error-border: #fecaca;
  --error-text: #b91c1c;
  --warn-bg: #fff8e1;
  --warn-border: #f6d88b;
  --warn-text: #92400e;
  --tp-input-radius: 8px;
  --tp-input-border-color: color-mix(in srgb, var(--border) 92%, #cbd5e1);
  --tp-input-focus-color: rgba(120, 170, 255, 0.24);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  padding: 24px 16px;
}

.site-wrap {
  min-height: calc(100vh - 48px);
  display: grid;
  place-items: center;
}

.tp-card {
  width: 100%;
  max-width: 520px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--tp-shadow);
}

.hero {
  text-align: center;
  margin-bottom: 10px;
}

.site-logo {
  display: block;
  width: min(240px, 72%);
  height: auto;
  margin: 0 auto 8px;
}

.site-logo--dark {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
  }

  .site-logo--light {
    display: none;
  }

  .site-logo--dark {
    display: block;
  }
}

h1 {
  margin: 0 0 8px;
  font-size: 24px;
  line-height: 1.2;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.subtitle + .subtitle {
  margin-top: 4px;
}

.device-row {
  margin: 14px 0;
  min-height: 24px;
}

.device-info,
.device-warn {
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 10px;
}

.device-info {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--muted);
}

.device-warn {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
}

.tp-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tp-field > label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 4px;
}

.tp-input {
  border: 1px solid var(--tp-input-border-color);
  border-radius: var(--tp-input-radius);
  padding: 8px 10px;
  font-size: 13px;
  color: var(--fg);
  background: var(--card);
}

.tp-input:focus {
  outline: 2px solid var(--tp-input-focus-color);
  border-color: color-mix(in srgb, var(--accent) 58%, var(--tp-input-border-color));
}

.tp-helper {
  margin: 2px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.field-error {
  margin: 3px 0 0;
  color: var(--error-text);
  font-size: 12px;
  min-height: 18px;
}

.tp-btn {
  border: none;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 700;
  padding: 10px 12px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.tp-btn:disabled {
  cursor: wait;
  opacity: 0.75;
}

.tp-btn--primary {
  background: var(--accent);
  color: #fff;
}

.tp-btn--primary:hover {
  filter: brightness(0.97);
}

.tp-btn--secondary {
  background: var(--surface-soft);
  color: var(--fg);
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border));
}

#unlockForm .tp-btn {
  margin-top: 10px;
  width: 100%;
}

.result {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.result h2 {
  margin: 0 0 8px;
  font-size: 14px;
}

.license-box {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--tp-input-border-color);
  border-radius: 8px;
  background: var(--card-soft);
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  overflow-wrap: anywhere;
  user-select: all;
}

.result-actions {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.copy-status {
  font-size: 12px;
  color: var(--success);
  min-height: 16px;
}

.next-btn {
  margin-top: 10px;
  width: 100%;
}

.error-panel,
.warn-panel {
  margin-top: 12px;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 12px;
}

.error-panel {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: var(--error-text);
}

.warn-panel {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
}

.steps {
  margin: 8px 0 14px;
  padding-left: 20px;
  color: var(--fg);
}

.steps li {
  margin-bottom: 6px;
  font-size: 13px;
}

.hidden {
  display: none;
}