:root {
  --brand: #006c98; /* Floatface's own blue -- logo/footer touches only */
  --primary: #6c4cf5;
  --primary-dark: #5636d1;
  --primary-soft: #efe9fe;
  --cta: #ff5a3c;
  --cta-dark: #e2432a;
  --bg: #f6f4fb;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #63636f;
  --border: #e2ddf3;
  --ok: #1a9c63;
  --ok-soft: #e1f8ec;
  --warn: #d97a06;
  --warn-soft: #fdf1d9;
  --error: #d43d34;
  --error-soft: #fbe6e4;
  --found: #d6288f;
  --found-soft: #fbe3f1;
  --connected: #0d9c8f;
  --connected-soft: #dcf5f2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #100b1e;
    --surface: #1a1430;
    --text: #f2effa;
    --muted: #b3aac9;
    --border: #362a56;
    --brand: #4bb3de;
    --primary: #9c86ff;
    --primary-dark: #c3b3ff;
    --primary-soft: #2a2050;
    --cta: #ff8a68;
    --cta-dark: #ffab8f;
    --ok: #4fd394;
    --ok-soft: #123527;
    --warn: #f0a94e;
    --warn-soft: #3a2a11;
    --error: #f0817a;
    --error-soft: #3d1917;
    --found: #ef6fc0;
    --found-soft: #3a1a30;
    --connected: #5bd6c8;
    --connected-soft: #10352f;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 500px at 15% -10%, var(--primary-soft), transparent), var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 17px;
}

main {
  max-width: 660px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 660px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 1.25rem;
}

.logo {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 14px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.5rem;
  background: linear-gradient(90deg, var(--primary), var(--found));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---- Stepper: connected numbered nodes, Etcher/installer-wizard style ---- */

.steps {
  max-width: 660px;
  margin: 0 auto 1.75rem;
  padding: 0 1.25rem;
  display: flex;
  align-items: flex-start;
  position: relative;
}

.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--muted);
  position: relative;
}

.step::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  left: -50%;
  width: 100%;
  height: 3px;
  background: var(--border);
  z-index: 0;
}

.step:first-child::before {
  display: none;
}

.step.done::before {
  background: var(--primary);
}

.step-num {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  background: var(--surface);
  border: 3px solid var(--border);
  color: var(--muted);
  z-index: 1;
  transition: transform 0.15s ease;
}

.step-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-align: center;
}

.step.active .step-num {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
  transform: scale(1.15);
}

.step.active .step-label {
  color: var(--primary);
}

.step.done .step-num {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* ---- Screens ---- */

.screen {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.75rem;
  box-shadow: 0 12px 30px -18px rgba(76, 44, 168, 0.35);
}

.screen.active {
  display: block;
}

h2 {
  margin-top: 0;
  font-size: 1.4rem;
}

.checklist {
  padding-left: 1.25rem;
}

.checklist li {
  margin-bottom: 0.6rem;
}

.callout {
  border-radius: 14px;
  padding: 0.9rem 1.1rem;
  margin: 1rem 0;
  font-size: 0.95rem;
  border: 2px solid var(--border);
}

.callout.ok {
  border-color: var(--ok);
  background: var(--ok-soft);
  color: var(--ok);
}

.callout.warn {
  border-color: var(--warn);
  background: var(--warn-soft);
  color: var(--warn);
}

.callout.error {
  border-color: var(--error);
  background: var(--error-soft);
  color: var(--error);
}

.note {
  font-size: 0.88rem;
  color: var(--muted);
}

.actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.1rem 0;
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.65rem 1.3rem;
  font-weight: 600;
}

button.primary {
  background: var(--cta);
  border-color: var(--cta);
  color: #fff;
  box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--cta) 70%, transparent);
}

button.primary:hover:not(:disabled) {
  background: var(--cta-dark);
  border-color: var(--cta-dark);
}

button.pill-lg {
  padding: 0.9rem 2rem;
  font-size: 1.1rem;
}

button.link {
  background: none;
  border: none;
  color: var(--primary);
  text-decoration: underline;
  padding: 0.3rem 0.2rem;
  font-weight: 500;
  border-radius: 4px;
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

.picked-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.log {
  background: #14101f;
  color: #d8cfff;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  max-height: 14rem;
  overflow-y: auto;
  white-space: pre-wrap;
  margin: 0.85rem 0;
}

/* ---- Prep reminders: static, no fiddly tap-to-toggle ---- */

.prep-steps {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin: 0.75rem 0 1.1rem;
}

.prep-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  width: 7.5rem;
  border-radius: 16px;
  background: var(--primary-soft);
  padding: 0.9rem 0.6rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  line-height: 1.25;
}

.prep-emoji {
  font-size: 1.8rem;
}

/* ---- Flow diagrams: small icon-pill sequences ---- */

.flow-diagram {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  font-size: 0.85rem;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  color: var(--text);
  font-weight: 500;
}

.flow-emoji {
  font-size: 1.15rem;
}

.flow-arrow {
  color: var(--muted);
  font-weight: 700;
}

/* ---- Status card: one big color-shifting focal icon, Etcher-style ---- */

.status-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.6rem;
  border-radius: 20px;
  padding: 2rem 1.5rem;
  margin: 1.1rem 0;
  background: var(--primary-soft);
  transition: background 0.25s ease;
}

.status-icon {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  background: var(--surface);
  box-shadow: 0 10px 24px -14px rgba(0, 0, 0, 0.35);
}

.status-headline {
  font-size: 1.15rem;
  font-weight: 700;
}

.status-subtext {
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 32rem;
}

.status-card.tone-progress {
  background: var(--primary-soft);
}

.status-card.tone-found {
  background: var(--found-soft);
}

.status-card.tone-found .status-headline {
  color: var(--found);
}

.status-card.tone-connected {
  background: var(--connected-soft);
}

.status-card.tone-connected .status-headline {
  color: var(--connected);
}

.status-card.tone-stuck {
  background: var(--warn-soft);
}

.status-card.tone-stuck .status-headline {
  color: var(--warn);
}

.status-card.tone-success {
  background: var(--ok-soft);
}

.status-card.tone-success .status-headline {
  color: var(--ok);
}

.status-card.tone-error {
  background: var(--error-soft);
}

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

.tips {
  background: var(--warn-soft);
  border-radius: 14px;
  padding: 1rem 1.2rem;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.tips p {
  margin-top: 0;
}

.tips ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.tips li {
  margin-bottom: 0.35rem;
}

.advanced {
  margin: 1rem 0;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.advanced summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.hex-display {
  background: #14101f;
  color: #8ef0b0;
  border-radius: 14px;
  padding: 1.1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  word-break: break-all;
  white-space: pre-wrap;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  padding: 2rem 1.25rem 3rem;
}

footer a {
  color: var(--primary);
}