/* AXF Playground — grey/blue/white brand, large readable controls */

:root {
  --blue-dark: #1F4E79;
  --blue-mid: #2E6FAE;
  --blue-light: #D4E6F4;
  --grey-900: #1C1C1E;
  --grey-600: #5A5A6A;
  --grey-300: #D1D5DB;
  --grey-100: #F4F7FB;
  --white: #FFFFFF;
  --red: #C0392B;
  --green: #1E7A3A;

  --radius: 10px;
  --gap: 20px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { font-size: 16px; }

body {
  margin: 0;
  background: var(--grey-100);
  color: var(--grey-900);
  font-family: var(--font);
  line-height: 1.5;
}

/* ── Header ──────────────────────────────────────────────────────────── */
header {
  background: var(--blue-dark);
  color: var(--white);
  padding: 20px 24px;
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}
.logo {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--blue-light);
}
header h1 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
}
.subtitle {
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.75;
  width: 100%;
}

/* ── Layout ──────────────────────────────────────────────────────────── */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 60px;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
.card h2 {
  margin: 0 0 20px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--blue-dark);
}

.hidden { display: none !important; }

/* ── Form fields ─────────────────────────────────────────────────────── */
.field {
  margin-bottom: 20px;
}
.field-label {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--grey-600);
  margin-bottom: 8px;
}
.required { color: var(--red); }
.field-hint {
  display: block;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--grey-600);
  opacity: 0.7;
  margin: -4px 0 8px;
  line-height: 1.35;
}

select,
textarea,
input[type="text"] {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--grey-300);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--grey-900);
  background: var(--white);
  transition: border-color 0.15s;
}
select:focus,
textarea:focus,
input[type="text"]:focus {
  outline: none;
  border-color: var(--blue-mid);
}

.radio-group,
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.radio-option,
.checkbox-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1.5px solid var(--grey-300);
  border-radius: 24px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color 0.15s, background 0.15s;
}
.radio-option:hover,
.checkbox-option:hover {
  border-color: var(--blue-mid);
}
.radio-option input,
.checkbox-option input {
  width: auto;
  accent-color: var(--blue-mid);
}

/* Constraint chip input */
.chip-input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}
.chip-input-row input {
  flex: 1;
}
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue-light);
  color: var(--blue-dark);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}
.chip-remove {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--blue-dark);
  padding: 0 2px;
}

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--blue-dark);
  color: var(--white);
  border: none;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 8px;
}
.btn-primary:hover { background: var(--blue-mid); }
.btn-primary:active { background: #153a5e; }

.btn-secondary {
  background: var(--white);
  color: var(--blue-dark);
  border: 2px solid var(--blue-dark);
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 8px;
}
.btn-secondary:hover { background: var(--blue-light); }

#add-constraint {
  background: var(--blue-mid);
  color: var(--white);
  border: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
}
#add-constraint:hover { background: var(--blue-dark); }

/* ── Loading ─────────────────────────────────────────────────────────── */
.loading-text {
  font-size: 1.1rem;
  color: var(--grey-600);
  text-align: center;
}
.spinner {
  width: 48px;
  height: 48px;
  border: 5px solid var(--grey-300);
  border-top-color: var(--blue-mid);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 20px auto 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Result header ───────────────────────────────────────────────────── */
.result-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.run-badge {
  font-size: 0.75rem;
  background: var(--grey-100);
  color: var(--grey-600);
  padding: 4px 10px;
  border-radius: 12px;
  border: 1px solid var(--grey-300);
  font-family: monospace;
}

/* ── Workout output ──────────────────────────────────────────────────── */
.category-section {
  margin-bottom: 24px;
}
.category-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--blue-dark);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.category-label.warmup { background: #5C9E78; }
.category-label.main   { background: var(--blue-dark); }
.category-label.core   { background: #7B5EA7; }
.category-label.cooldown { background: #C07E44; }

.exercise-card {
  border: 1px solid var(--grey-300);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
}
.exercise-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--grey-900);
  margin: 0 0 4px;
}
.exercise-meta {
  font-size: 0.82rem;
  color: var(--grey-600);
  margin-bottom: 10px;
}
.sets-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.set-chip {
  background: var(--grey-100);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.82rem;
  color: var(--grey-900);
}

/* Exercise feedback */
.exercise-feedback {
  margin-top: 10px;
  border-top: 1px solid var(--grey-100);
  padding-top: 10px;
}
.exercise-feedback label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--grey-600);
  margin-bottom: 6px;
}
.feedback-textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 0.9rem;
  padding: 8px 12px;
  border: 1.5px solid var(--grey-300);
  border-radius: 6px;
  resize: vertical;
}
.feedback-textarea:focus {
  outline: none;
  border-color: var(--blue-mid);
}

/* Voice recording */
.voice-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}
.btn-voice {
  background: var(--white);
  color: var(--blue-mid);
  border: 1.5px solid var(--blue-mid);
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-voice:hover { background: var(--blue-light); }
.btn-voice.recording {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
}
.btn-voice:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.voice-status {
  font-size: 0.8rem;
  color: var(--grey-600);
}

/* Workout-level feedback */
.feedback-block {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--grey-300);
}
.feedback-block h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--blue-dark);
}

/* Prompt disclosure */
.prompt-details {
  margin: 20px 0;
  border: 1px solid var(--grey-300);
  border-radius: 8px;
  overflow: hidden;
}
.prompt-details summary {
  padding: 12px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--grey-100);
  color: var(--grey-600);
}
.prompt-details summary:hover { background: var(--blue-light); }
.prompt-view {
  padding: 16px;
}
.prompt-view h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--grey-600);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.prompt-view pre {
  background: var(--grey-100);
  border: 1px solid var(--grey-300);
  border-radius: 6px;
  padding: 12px;
  font-size: 0.8rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--grey-900);
  margin: 0 0 16px;
}

/* Save confirmation */
.save-confirmation {
  color: var(--green);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 8px;
}

@media (max-width: 600px) {
  .card { padding: 18px; }
  .header-inner h1 { font-size: 1.1rem; }
}