/* SSSS — Ultramodern dark theme */
:root {
  --bg: #0a0a0f;
  --bg-elevated: #12121a;
  --bg-card: rgba(18, 18, 26, 0.7);
  --border: rgba(255, 255, 255, 0.06);
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.4);
  --accent-glow: rgba(34, 211, 238, 0.15);
  --success: #34d399;
  --error: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
  overflow-x: hidden;
}

/* Gradient mesh background */
.bg-mesh {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(34, 211, 238, 0.08), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(34, 211, 238, 0.05), transparent);
  pointer-events: none;
  z-index: 0;
}

/* Main card */
main.card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 480px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: cardIn var(--transition-slow) ease-out;
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero header */
.hero {
  margin-bottom: 2rem;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.hero p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Sections */
.section {
  margin-top: 1.5rem;
}

.section h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
}

/* Form */
.form label {
  display: block;
  margin-bottom: 1.25rem;
}

.label-text {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.label-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

input,
textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-dim);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
  resize: vertical;
  min-height: 5rem;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover:not(:disabled) {
  background: #06b6d4;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

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

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--accent-dim);
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

/* Result block */
.result-block {
  margin-bottom: 1.5rem;
}

.result-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.result-hint {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.result-actions {
  margin-bottom: 0.75rem;
}

.result-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.result-link {
  flex: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  word-break: break-all;
}

.result-link:hover {
  text-decoration: underline;
}

/* Token list */
.token-list {
  list-style: none;
}

.token-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  word-break: break-all;
  color: var(--text-muted);
  animation: tokenIn var(--transition) ease-out;
  flex-wrap: wrap;
}

.token-list li:last-child {
  border-bottom: none;
}

.token-list code.token-value {
  flex: 1;
  min-width: 0;
}

.token-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

@keyframes tokenIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Progress ring (room page) */
.progress-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 1rem;
  flex-shrink: 0;
}

.progress-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 6;
}

.progress-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 339.292;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.progress-sep {
  color: var(--text-dim);
  font-weight: 400;
}

.status-msg {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.status-music {
  display: block;
  margin: 0.5rem auto 0;
}

/* Secret reveal */
.secret-reveal {
  margin-top: 0.5rem;
  padding: 1.25rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  animation: revealIn var(--transition-slow) ease-out;
}

@keyframes revealIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

#secret-text {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  margin-bottom: 1rem;
}

#secret-text.secret-masked {
  user-select: none;
  letter-spacing: 0.15em;
}

.secret-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Visibility */
.hidden {
  display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
  body {
    padding: 1rem;
    align-items: flex-start;
    padding-top: 1.5rem;
  }
  main.card {
    padding: 1.5rem;
    max-width: 100%;
  }
  .row {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .hero p {
    font-size: 0.9rem;
  }
  .result-row {
    flex-direction: column;
    align-items: stretch;
  }
  .token-list li {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .token-actions {
    justify-content: flex-end;
  }
  .btn {
    min-height: 44px;
  }
  .progress-wrap {
    width: 100px;
    height: 100px;
  }
  .progress-bg,
  .progress-fill {
    stroke-width: 5;
  }
  .progress-center {
    font-size: 1rem;
  }
  .secret-reveal {
    padding: 1rem;
  }
  #secret-text {
    font-size: 0.85rem;
  }
}

@media (max-width: 380px) {
  body { padding: 0.75rem; }
  main.card { padding: 1rem; }
}