/* UnGlutened — calm clinical health aesthetic.
   Off-white canvas, one teal accent, system font stack, rounded cards,
   generous tap targets, mobile-first and responsive. */

:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #eef2f1;
  --ink: #1f2a2e;
  --ink-soft: #51605f;
  --ink-faint: #87928f;
  --line: #e2e8e6;
  --accent: #0d9488;
  --accent-strong: #0f766e;
  --accent-soft: #d7f1ec;
  --accent-ink: #0b5d55;
  --warn: #c2410c;
  --warn-soft: #fde6d9;
  --danger: #b91c1c;
  --danger-soft: #fbe2e2;
  --good: #15803d;
  --good-soft: #dcfce7;
  --shadow: 0 1px 2px rgba(16, 40, 38, 0.06), 0 6px 18px rgba(16, 40, 38, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --tap: 44px;
  --maxw: 540px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
}

button { font-family: inherit; }

/* ---------- App scaffold ---------- */
#app {
  max-width: var(--maxw);
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  position: relative;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: calc(env(safe-area-inset-top, 0px) + 12px) 16px 12px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.topbar .brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.topbar .brand img { width: 26px; height: 26px; border-radius: 7px; display: block; }
.topbar .brand b { color: var(--accent-strong); }
.topbar .spacer { flex: 1; }
.iconbtn {
  width: var(--tap); height: var(--tap);
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  color: var(--ink-soft);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer;
}
.iconbtn:active { transform: scale(0.97); }

main {
  flex: 1;
  padding: 16px 16px calc(96px + env(safe-area-inset-bottom, 0px));
  overflow-x: hidden;
}

.view { display: none; animation: fade 0.18s ease; }
.view.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px);} to {opacity:1; transform:none;} }

.view-head { margin: 2px 0 14px; }
.view-head h1 { font-size: 22px; margin: 0 0 2px; letter-spacing: -0.02em; }
.view-head p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 14px;
}
.card h2 { font-size: 16px; margin: 0 0 12px; letter-spacing: -0.01em; }
.card .hint { color: var(--ink-faint); font-size: 13px; margin: 0 0 12px; }

/* ---------- Buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  min-height: var(--tap);
  padding: 0 18px;
  border-radius: 12px;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: background .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn:hover { background: var(--accent-strong); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn.block { width: 100%; }
.btn.secondary { background: var(--surface); color: var(--accent-ink); border-color: var(--accent-soft); }
.btn.secondary:hover { background: var(--accent-soft); }
.btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #991b1b; }
.btn.sm { min-height: 36px; padding: 0 12px; font-size: 13px; border-radius: 10px; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-row .btn { flex: 1; }

/* ---------- Photo CTA (camera + gallery) ---------- */
.photo-cta {
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  gap: 8px;
  padding: 26px 18px 20px;
  border: 2px dashed var(--accent-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff, #f3fbf9);
  margin-bottom: 14px;
}
.photo-cta .glyph {
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
}
.photo-cta strong { font-size: 17px; }
.photo-cta span { color: var(--ink-soft); font-size: 13.5px; max-width: 320px; }
.photo-actions { display: flex; gap: 10px; width: 100%; margin-top: 10px; }
.photo-btn { flex: 1; cursor: pointer; }
.photo-btn input[type=file] { display: none; }

/* ---------- Forms ---------- */
.field { margin-bottom: 14px; }
.field > label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; }
.field .sub { font-weight: 400; color: var(--ink-faint); }
input[type=text], input[type=password], input[type=datetime-local], input[type=date], textarea, select {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 11px 12px;
  min-height: var(--tap);
}
textarea { min-height: 80px; resize: vertical; }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- Range / scale controls ---------- */
.scale { margin-bottom: 16px; }
.scale .scale-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; }
.scale .scale-head label { font-size: 14px; font-weight: 600; }
.scale .scale-val { font-size: 13px; color: var(--accent-ink); font-weight: 700; }
.seg {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 6px;
}
.seg button {
  min-height: var(--tap);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  padding: 0 2px;
}
.seg button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.seg.small button { font-size: 13px; }
.scale .scale-desc { margin-top: 6px; font-size: 12.5px; color: var(--ink-faint); min-height: 16px; }

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.chip.irritant { background: var(--warn-soft); color: var(--warn); border-color: #f3c9b3; }
.chip.good { background: var(--good-soft); color: var(--good); border-color: #b7e3c4; }
.chip.accent { background: var(--accent-soft); color: var(--accent-ink); border-color: #b7e1da; }
.chip.removable { cursor: default; }
.chip .x {
  cursor: pointer;
  border: none; background: transparent; color: inherit;
  font-size: 15px; line-height: 1; padding: 0; margin-left: 1px;
}
.chip.selectable { cursor: pointer; background: var(--surface); }
.chip.selectable[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-ink); border-color: #b7e1da; }

/* Irritant toggle buttons (meal edit): off = neutral, on = warning/amber. */
.irritant-grid { gap: 8px; }
.chip.selectable.irritant-toggle { padding: 9px 13px; font-size: 13.5px; }
.chip.selectable.irritant-toggle[aria-pressed="true"] { background: var(--warn-soft); color: var(--warn); border-color: #f3c9b3; }
.chip.selectable.irritant-toggle[aria-pressed="true"]::before { content: "✓ "; font-weight: 700; }

.chip-add { display: flex; gap: 7px; margin-top: 9px; }
.chip-add input { min-height: 38px; }
.chip-add .btn { min-height: 38px; }

/* ---------- Ingredient list ---------- */
.ingredients { list-style: none; margin: 0; padding: 0; }
.ingredients li {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px;
}
.ingredients li:last-child { border-bottom: none; }
.ingredients .name { flex: 1; font-weight: 600; }
.ingredients .cat { color: var(--ink-faint); font-size: 12px; }
.ingredients .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); flex: none; }
.ingredients .dot.irritant { background: var(--warn); }

/* ---------- Preview ---------- */
.preview {
  width: 100%; border-radius: var(--radius-sm);
  border: 1px solid var(--line); display: block; margin-bottom: 12px;
  max-height: 280px; object-fit: cover;
}

/* ---------- Spinner ---------- */
.spinner {
  width: 22px; height: 22px; border-radius: 50%;
  border: 3px solid var(--accent-soft); border-top-color: var(--accent);
  animation: spin .8s linear infinite; flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-row { display: flex; align-items: center; gap: 12px; color: var(--ink-soft); font-size: 14px; padding: 6px 0; }

/* ---------- Timeline / History ---------- */
.timeline { display: flex; flex-direction: column; gap: 12px; }
.tl-day-label { font-size: 12px; font-weight: 700; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .05em; margin: 6px 2px 0; }
.tl-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px;
  display: flex;
  gap: 12px;
}
.tl-item .thumb {
  width: 56px; height: 56px; border-radius: 12px; object-fit: cover;
  background: var(--surface-2); flex: none;
}
.tl-item .thumb.placeholder {
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 22px;
}
.tl-body { flex: 1; min-width: 0; }
.tl-body .tl-time { font-size: 12px; color: var(--ink-faint); display: flex; align-items: center; gap: 7px; }
.tl-body .tl-kind { font-size: 10.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; padding: 2px 6px; border-radius: 6px; }
.tl-kind.meal { background: var(--accent-soft); color: var(--accent-ink); }
.tl-kind.gut { background: var(--surface-2); color: var(--ink-soft); }
.tl-body .tl-title { font-weight: 600; margin: 3px 0 6px; word-break: break-word; }
.tl-body .chips { margin-top: 6px; }
.tl-actions { display: flex; gap: 6px; margin-top: 10px; }
.tl-actions .btn { flex: none; }

.badges { display: flex; flex-wrap: wrap; gap: 6px; }
.badge {
  font-size: 12px; font-weight: 600; padding: 4px 9px; border-radius: 8px;
  background: var(--surface-2); color: var(--ink-soft); border: 1px solid var(--line);
}
.badge.hi { background: var(--warn-soft); color: var(--warn); border-color: #f3c9b3; }
.badge.lo { background: var(--good-soft); color: var(--good); border-color: #b7e3c4; }

/* ---------- Insights ---------- */
.window-pick { display: flex; gap: 8px; margin-bottom: 14px; }
.window-pick button {
  flex: 1; min-height: var(--tap); border-radius: 12px;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--ink-soft); font-weight: 600; font-size: 14px; cursor: pointer;
}
.window-pick button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.corr {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow);
  padding: 14px; margin-bottom: 12px;
}
.corr .corr-top { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.corr .sev-dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
.sev-high { background: var(--danger); }
.sev-medium { background: var(--warn); }
.sev-low { background: #ca8a04; }
.sev-protective { background: var(--good); }
.corr .corr-name { font-weight: 700; font-size: 16px; flex: 1; text-transform: capitalize; }
.corr .corr-kind { font-size: 11px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .04em; }
.corr .corr-label { font-size: 14px; margin: 0 0 10px; color: var(--ink-soft); }
.corr .corr-stats { display: flex; gap: 10px; }
.corr .stat { flex: 1; background: var(--surface-2); border-radius: 10px; padding: 8px 10px; text-align: center; }
.corr .stat .k { font-size: 11px; color: var(--ink-faint); display: block; }
.corr .stat .v { font-size: 18px; font-weight: 700; }
.corr .stat.delta .v.up { color: var(--danger); }
.corr .stat.delta .v.down { color: var(--good); }
.corr .corr-meta { margin-top: 8px; font-size: 12px; color: var(--ink-faint); }

.empty {
  text-align: center; padding: 30px 18px; color: var(--ink-soft);
  border: 1px dashed var(--line); border-radius: var(--radius); background: var(--surface);
}
.empty .glyph { font-size: 30px; margin-bottom: 8px; }
.empty p { margin: 0 auto; max-width: 320px; font-size: 14px; line-height: 1.5; }

/* ---------- Report ---------- */
.report-box {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; margin-top: 12px;
}
.report-md {
  white-space: pre-wrap; word-break: break-word;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px; line-height: 1.55; color: var(--ink);
  max-height: 360px; overflow: auto;
  background: var(--surface-2); border-radius: 10px; padding: 12px;
}

/* ---------- Chat ---------- */
.chat-view { display: flex; flex-direction: column; height: calc(100dvh - 64px - 84px); }
.chat-scroll { flex: 1; overflow-y: auto; padding: 4px 2px 8px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 86%; padding: 10px 13px; border-radius: 16px; font-size: 14.5px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 5px; }
.msg.assistant { align-self: flex-start; background: var(--surface); border: 1px solid var(--line); color: var(--ink); border-bottom-left-radius: 5px; }
.msg.system-note { align-self: center; background: var(--good-soft); color: var(--good); border: 1px solid #b7e3c4; font-size: 12.5px; font-weight: 600; padding: 5px 11px; border-radius: 999px; }
.chat-examples { display: flex; gap: 7px; flex-wrap: wrap; padding: 4px 0 10px; }
.chat-examples .chip { cursor: pointer; background: var(--surface); }
.chat-input-row { display: flex; gap: 8px; padding: 8px 0 calc(8px + env(safe-area-inset-bottom, 0px)); }
.chat-input-row input { flex: 1; }

/* ---------- Bottom nav ---------- */
.tabbar {
  position: fixed;
  left: 50%; transform: translateX(-50%);
  bottom: 0;
  width: 100%; max-width: var(--maxw);
  display: grid; grid-template-columns: repeat(5, 1fr);
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  z-index: 30;
}
.tabbar button {
  background: transparent; border: none; cursor: pointer;
  padding: 8px 2px 9px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  color: var(--ink-faint); font-size: 11px; font-weight: 600;
  min-height: 56px;
}
.tabbar button .ic { font-size: 20px; line-height: 1; }
.tabbar button[aria-current="page"] { color: var(--accent-strong); }

/* ---------- Auth screen (sign in / sign up) ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px; overflow: auto;
}
.overlay.hidden { display: none; }

.auth {
  background:
    radial-gradient(120% 80% at 12% -10%, #d9f2ec 0%, rgba(217,242,236,0) 55%),
    radial-gradient(110% 70% at 100% 112%, #b9e7df 0%, rgba(185,231,223,0) 52%),
    linear-gradient(165deg, #f4f9f7 0%, #e1f0ec 100%);
}
.auth-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.auth-bg::before, .auth-bg::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(46px); opacity: .45;
}
.auth-bg::before { width: 250px; height: 250px; top: -70px; right: -50px; background: #7fd8c9; }
.auth-bg::after { width: 210px; height: 210px; bottom: -60px; left: -55px; background: #a7e3d8; }

.auth-inner {
  position: relative; z-index: 1;
  width: 100%; max-width: 380px;
  display: flex; flex-direction: column; align-items: center;
}
.auth-hero { text-align: center; margin-bottom: 18px; display: flex; flex-direction: column; align-items: center; }
.auth-logo {
  width: 70px; height: 70px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center; background: #fff;
  box-shadow: 0 12px 30px rgba(13,148,136,.28), 0 2px 6px rgba(16,40,38,.08);
  margin-bottom: 14px;
}
.auth-logo img { width: 52px; height: 52px; border-radius: 14px; display: block; }
.auth-wordmark { font-size: 27px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); }
.auth-wordmark b { color: var(--accent-strong); font-weight: 800; }
.auth-tagline { display: block; margin-top: 7px; color: var(--ink-soft); font-size: 14px; }

.auth-card {
  width: 100%; background: var(--surface);
  border: 1px solid rgba(226,232,230,.9); border-radius: 22px;
  box-shadow: 0 14px 44px rgba(16,40,38,.13), 0 2px 6px rgba(16,40,38,.05);
  padding: 24px 22px 22px;
}
.auth-intro { margin: 0 0 18px; text-align: center; color: var(--ink-soft); font-size: 14.5px; }
.auth-field { margin-bottom: 14px; text-align: left; }
.auth-field input { min-height: 50px; border-radius: 12px; background: #f8faf9; font-size: 16px; }
.auth-field input:focus { background: #fff; }
.auth-submit {
  min-height: 50px; font-size: 16px; border-radius: 12px; margin-top: 4px;
  background: linear-gradient(135deg, #14b8a6, var(--accent-strong));
  box-shadow: 0 8px 20px rgba(13,148,136,.30);
}
.auth-submit:hover { background: linear-gradient(135deg, #0fb3a0, #0c655e); }
.auth-toggle { margin: 16px 0 2px; text-align: center; font-size: 14px; color: var(--ink-soft); }
.auth-toggle a { color: var(--accent-strong); font-weight: 700; text-decoration: none; cursor: pointer; }
.auth-toggle a:hover { text-decoration: underline; }
.auth-card .err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 16px; text-align: center; }
.auth-foot { margin: 18px 0 0; text-align: center; color: var(--ink-faint); font-size: 12px; max-width: 330px; line-height: 1.5; }

/* ---------- Settings sheet ---------- */
.sheet-backdrop { position: fixed; inset: 0; background: rgba(15,30,28,.4); z-index: 90; display: none; }
.sheet-backdrop.open { display: block; }
.sheet {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: 0; width: 100%; max-width: var(--maxw);
  background: var(--surface); border-radius: 20px 20px 0 0;
  box-shadow: 0 -10px 30px rgba(16,40,38,.18);
  padding: 18px 18px calc(22px + env(safe-area-inset-bottom, 0px));
  z-index: 95; transform: translate(-50%, 100%); transition: transform .22s ease;
}
.sheet.open { transform: translate(-50%, 0); }
.sheet h2 { margin: 0 0 4px; font-size: 18px; }
.sheet .row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.sheet .row:last-of-type { border-bottom: none; }
.sheet .row .k { color: var(--ink-soft); }
.sheet .row .v { font-weight: 600; }
.sheet .handle { width: 38px; height: 4px; border-radius: 4px; background: var(--line); margin: 0 auto 14px; }

/* ---------- Modal form (edit) ---------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15,30,28,.45); z-index: 110; display: none; align-items: flex-end; justify-content: center; }
.modal-backdrop.open { display: flex; }
.modal {
  width: 100%; max-width: var(--maxw); background: var(--bg);
  border-radius: 20px 20px 0 0; max-height: 92dvh; overflow: auto;
  padding: 16px 16px calc(20px + env(safe-area-inset-bottom, 0px));
}
.modal .modal-head { display: flex; align-items: center; gap: 10px; position: sticky; top: 0; background: var(--bg); padding-bottom: 10px; z-index: 2; }
.modal .modal-head h2 { flex: 1; margin: 0; font-size: 18px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: calc(80px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%) translateY(16px);
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 200;
  max-width: 88%; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }
.toast.ok { background: var(--accent-strong); }

.footer-note { text-align: center; color: var(--ink-faint); font-size: 11.5px; padding: 8px 0 2px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (min-width: 560px) {
  #app { box-shadow: 0 0 0 1px var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}