/* Peptide Buddy - styles.css
   Mobile-first, calm/trustworthy palette, light+dark via CSS variables, WCAG AA contrast,
   >=44px tap targets, visible focus states. */

@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap");

:root {
  --font-sans: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* soft mint/teal primary, warm neutral background */
  --color-primary: #2f9e8f;
  --color-primary-dark: #1f6f64;
  --color-primary-contrast: #ffffff;
  --color-bg: #faf6ef;
  --color-surface: #ffffff;
  --color-surface-alt: #f2ede2;
  --color-text: #22292b;
  --color-text-muted: #5c6b6a;
  --color-border: #e6ded0;
  --color-focus: #1f6f64;

  --color-success: #2f8f5b;
  --color-success-bg: #e7f5ec;
  --color-warning: #9a6b00;
  --color-warning-bg: #fff3d6;
  --color-danger: #b3261e;
  --color-danger-bg: #fbe9e7;
  --color-info-bg: #e7f1f5;

  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --tap-min: 44px;
  --shadow-card: 0 1px 2px rgba(20, 30, 30, 0.06), 0 4px 14px rgba(20, 30, 30, 0.06);

  --peptide-color-1: #2f9e8f;
  --peptide-color-2: #7a6bd6;
  --peptide-color-3: #d67a2e;
  --peptide-color-4: #2e7fd6;
  --peptide-color-5: #c14f8f;
  --peptide-color-6: #5a9e2f;
  --peptide-color-7: #d6482e;
  --peptide-color-8: #2ea3a3;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #4fc4b3;
    --color-primary-dark: #8ee8d9;
    --color-primary-contrast: #06201c;
    --color-bg: #14191a;
    --color-surface: #1d2426;
    --color-surface-alt: #232b2d;
    --color-text: #eef3f2;
    --color-text-muted: #a9b7b6;
    --color-border: #333f41;
    --color-focus: #8ee8d9;
    --color-success: #6fd39a;
    --color-success-bg: #123424;
    --color-warning: #ffcf66;
    --color-warning-bg: #3a2c05;
    --color-danger: #ff8a80;
    --color-danger-bg: #3a1512;
    --color-info-bg: #16292f;
  }
}

:root[data-theme="dark"] {
  --color-primary: #4fc4b3;
  --color-primary-dark: #8ee8d9;
  --color-primary-contrast: #06201c;
  --color-bg: #14191a;
  --color-surface: #1d2426;
  --color-surface-alt: #232b2d;
  --color-text: #eef3f2;
  --color-text-muted: #a9b7b6;
  --color-border: #333f41;
  --color-focus: #8ee8d9;
  --color-success: #6fd39a;
  --color-success-bg: #123424;
  --color-warning: #ffcf66;
  --color-warning-bg: #3a2c05;
  --color-danger: #ff8a80;
  --color-danger-bg: #3a1512;
  --color-info-bg: #16292f;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; margin: 0 0 8px; }
p { margin: 0 0 10px; }
a { color: var(--color-primary-dark); }

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

button, input, select, textarea { font-family: inherit; font-size: 1rem; color: inherit; }

.pb-app { max-width: 480px; margin: 0 auto; min-height: 100vh; display: flex; flex-direction: column; padding-bottom: calc(64px + env(safe-area-inset-bottom)); }

.pb-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px 8px;
  position: sticky; top: 0; background: var(--color-bg); z-index: 5;
}
.pb-header h1 { font-size: 1.15rem; margin: 0; }
.pb-header .pb-back {
  background: none; border: none; min-width: var(--tap-min); min-height: var(--tap-min);
  display: flex; align-items: center; justify-content: center; border-radius: 50%;
  color: var(--color-text); font-size: 1.3rem; cursor: pointer;
}
.pb-header .pb-back:hover { background: var(--color-surface-alt); }

main.pb-main { flex: 1; padding: 4px 16px 24px; }

.pb-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 18px;
  margin-bottom: 16px;
}
.pb-card h2, .pb-card h3 { margin-top: 0; }

.pb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--tap-min); padding: 10px 18px;
  border-radius: var(--radius-md); border: none; cursor: pointer;
  font-weight: 700; font-size: 1rem;
  background: var(--color-surface-alt); color: var(--color-text);
  transition: transform 0.05s ease;
  width: 100%;
}
.pb-btn:active { transform: scale(0.98); }
.pb-btn.pb-btn-primary { background: var(--color-primary); color: var(--color-primary-contrast); }
.pb-btn.pb-btn-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.pb-btn.pb-btn-ghost { background: transparent; border: 1.5px solid var(--color-border); }
.pb-btn.pb-btn-sm { min-height: 38px; padding: 6px 14px; font-size: 0.9rem; width: auto; }
.pb-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.pb-btn-row { display: flex; gap: 10px; margin-top: 12px; }
.pb-btn-row .pb-btn { flex: 1; }

.pb-field { margin-bottom: 16px; }
.pb-field label, .pb-label { display: block; font-weight: 700; margin-bottom: 6px; }
.pb-hint { color: var(--color-text-muted); font-size: 0.88rem; margin-top: 4px; }
.pb-input, .pb-select, .pb-textarea {
  width: 100%; min-height: var(--tap-min);
  border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  padding: 10px 14px; background: var(--color-surface); color: var(--color-text);
}
.pb-textarea { min-height: 80px; resize: vertical; }

.pb-chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pb-chip {
  min-height: var(--tap-min); padding: 8px 16px; border-radius: 999px;
  border: 1.5px solid var(--color-border); background: var(--color-surface);
  cursor: pointer; font-weight: 700;
}
.pb-chip.pb-chip-selected { background: var(--color-primary); color: var(--color-primary-contrast); border-color: var(--color-primary); }

/* Selected state for card-style choices (syringe cards and other ghost buttons). */
.pb-btn.pb-chip-selected {
  position: relative;
  background: var(--color-info-bg);
  border: 2.5px solid var(--color-primary);
  color: var(--color-primary-dark);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 22%, transparent);
}
.pb-btn.pb-chip-selected::after {
  content: "\2713";
  position: absolute; top: 8px; right: 10px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--color-primary); color: var(--color-primary-contrast);
  font-size: 14px; line-height: 24px; text-align: center; font-weight: 800;
}

.pb-toggle-row { display: flex; border: 1.5px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; }
.pb-toggle-row .pb-toggle-opt { flex: 1; min-height: var(--tap-min); background: var(--color-surface); border: none; cursor: pointer; font-weight: 700; }
.pb-toggle-row .pb-toggle-opt.pb-toggle-selected { background: var(--color-primary); color: var(--color-primary-contrast); }

.pb-progress-dots { display: flex; justify-content: center; gap: 8px; margin: 12px 0 4px; }
.pb-progress-dots .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-border); }
.pb-progress-dots .dot.active { background: var(--color-primary); width: 22px; border-radius: 5px; }

.pb-warning { border-radius: var(--radius-md); padding: 12px 14px; margin-bottom: 10px; font-weight: 600; }
.pb-warning.level-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.pb-warning.level-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.pb-warning.level-info { background: var(--color-info-bg); color: var(--color-text); }

.pb-syringe-wrap { background: var(--color-surface-alt); border-radius: var(--radius-md); padding: 8px; overflow: hidden; }
.pb-syringe-svg { width: 100%; height: auto; display: block; touch-action: pinch-zoom; }
.pb-barrel { fill: var(--color-surface); stroke: var(--color-text-muted); stroke-width: 2; }
.pb-liquid { fill: var(--color-primary); opacity: 0.28; }
.pb-flange, .pb-needle, .pb-plunger-rod { fill: var(--color-text-muted); }
.pb-needle-tip { fill: var(--color-text-muted); }
.pb-stopper { fill: #1c1c1c; }
.pb-dose-line { stroke: var(--color-danger); stroke-width: 2; stroke-dasharray: 4 3; }
.pb-tick-major { stroke: var(--color-text); }
.pb-tick-minor { stroke: var(--color-text-muted); }
.pb-tick-label { font-size: 13px; fill: var(--color-text); font-weight: 700; }
.pb-callout-line { stroke: var(--color-danger); stroke-width: 1.5; }
.pb-callout-text { font-size: 12px; fill: var(--color-danger); font-weight: 700; }
.pb-big-label { font-size: 20px; font-weight: 800; fill: var(--color-text); }

.pb-tabbar {
  position: fixed; bottom: 0; left: 0; right: 0;
  display: flex; background: var(--color-surface); border-top: 1px solid var(--color-border);
  padding-bottom: env(safe-area-inset-bottom); z-index: 10;
  max-width: 480px; margin: 0 auto;
}
.pb-tabbar .pb-tab {
  flex: 1; min-height: 58px; background: none; border: none; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  color: var(--color-text-muted); font-weight: 700; font-size: 0.72rem;
}
.pb-tabbar .pb-tab.active { color: var(--color-primary-dark); }
.pb-tabbar .pb-tab .pb-tab-icon { font-size: 1.3rem; }

.pb-peptide-badge { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; }
.pb-peptide-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }

.pb-streak { display: flex; gap: 6px; align-items: baseline; }
.pb-streak .pb-streak-num { font-size: 2rem; font-weight: 800; color: var(--color-primary-dark); }

.pb-list { list-style: none; margin: 0; padding: 0; }
.pb-list li { padding: 12px 0; border-bottom: 1px solid var(--color-border); }
.pb-list li:last-child { border-bottom: none; }

.pb-empty { text-align: center; color: var(--color-text-muted); padding: 32px 16px; }

.pb-bodymap { width: 100%; }
.pb-bodymap .zone { fill: var(--color-surface-alt); stroke: var(--color-border); cursor: pointer; }
.pb-bodymap .zone.suggested { fill: var(--color-success-bg); stroke: var(--color-success); stroke-width: 2; }
.pb-bodymap .zone-label { font-size: 11px; fill: var(--color-text-muted); text-anchor: middle; }
.pb-bodymap .keep-clear { fill: none; stroke: var(--color-danger); stroke-dasharray: 3 3; }

.pb-collapsible summary { cursor: pointer; font-weight: 700; padding: 10px 0; list-style: none; display: flex; align-items: center; justify-content: space-between; }
.pb-collapsible summary::-webkit-details-marker { display: none; }
.pb-collapsible summary::after { content: "+"; font-size: 1.3rem; }
.pb-collapsible[open] summary::after { content: "-"; }

.pb-study-card { background: var(--color-surface-alt); border-radius: var(--radius-md); padding: 12px; margin-bottom: 10px; }
.pb-study-quote { font-style: italic; color: var(--color-text-muted); border-left: 3px solid var(--color-border); padding-left: 10px; margin: 6px 0; }

.pb-modal-overlay {
  position: fixed; inset: 0; background: rgba(10, 15, 15, 0.55);
  display: flex; align-items: flex-end; justify-content: center; z-index: 50; padding: 12px;
}
.pb-modal { background: var(--color-surface); border-radius: var(--radius-lg); padding: 20px; width: 100%; max-width: 480px; max-height: 88vh; overflow-y: auto; }

.pb-learn-illustration { width: 100%; max-width: 220px; display: block; margin: 0 auto 10px; }

.pb-badge-pill { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 700; background: var(--color-info-bg); }

.pb-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

table.pb-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
table.pb-table th, table.pb-table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--color-border); }
table.pb-table tr.readable { background: var(--color-success-bg); }

.pb-skip-link { position: absolute; left: -9999px; }
.pb-skip-link:focus { left: 8px; top: 8px; background: var(--color-surface); padding: 8px 12px; border-radius: 8px; z-index: 100; }

@media (max-width: 380px) {
  main.pb-main { padding-left: 12px; padding-right: 12px; }
  .pb-header { padding-left: 12px; padding-right: 12px; }
}