/* Base: reset, type, shell, buttons, forms. Logical properties only (Constitution 5/2). */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: 1.65;
  background: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
  min-block-size: 100vh;
  font-variant-numeric: tabular-nums;
}
a { color: var(--c-primary); text-underline-offset: 0.2em; }
img, svg { max-inline-size: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; border-radius: var(--radius-sm); }
.sr-only { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; inset-block-start: -4rem; inset-inline-start: var(--sp-3); z-index: 100; background: var(--c-primary); color: var(--c-on-primary); padding: var(--sp-2) var(--sp-4); border-radius: var(--radius-sm); }
.skip:focus { inset-block-start: var(--sp-3); }

/* ---------- Type ---------- */
h1 { font-size: var(--fs-xl); margin: 0 0 var(--sp-3); line-height: 1.35; font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: var(--fs-lg); margin: 0 0 var(--sp-3); line-height: 1.4; font-weight: 700; }
h3 { font-size: var(--fs-md); margin: 0 0 var(--sp-2); font-weight: 700; }
p { margin: 0 0 var(--sp-3); }
.lead { font-size: var(--fs-lg); color: var(--c-text-muted); max-inline-size: 38rem; }
.muted { color: var(--c-text-muted); }
.small { font-size: var(--fs-sm); }
.xs { font-size: var(--fs-xs); }
.strong { font-weight: 700; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.time { white-space: nowrap; unicode-bidi: isolate; }
.ampm { font-size: 0.6em; font-weight: 700; margin-inline-start: 0.18em; opacity: 0.85; }
.ic { inline-size: 1.25em; block-size: 1.25em; flex: none; vertical-align: -0.22em; }
.ic-fill { fill: currentColor; stroke: none; }

/* ---------- Shell ---------- */
.topbar { position: sticky; inset-block-start: 0; z-index: 20; background: var(--c-glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-block-end: 1px solid var(--c-border); }
.topbar-inner { max-inline-size: var(--maxw); margin-inline: auto; display: flex; align-items: center; gap: var(--sp-2); padding: var(--sp-2) var(--sp-4); min-block-size: 3.75rem; }
.brand { display: inline-flex; align-items: center; gap: var(--sp-2); font-weight: 800; font-size: var(--fs-lg); color: var(--c-text); text-decoration: none; margin-inline-end: auto; }
.brand-mark { inline-size: 2.25rem; block-size: 2.25rem; border-radius: 0.7rem; background: var(--c-primary); color: var(--c-on-primary); display: grid; place-items: center; box-shadow: var(--shadow-btn); }
.brand-mark .ic { inline-size: 1.35rem; block-size: 1.35rem; }
.nav-desktop { display: none; gap: var(--sp-1); align-items: center; }
.nav-desktop a { min-block-size: var(--touch); display: inline-flex; align-items: center; gap: var(--sp-2); padding-inline: var(--sp-3); border-radius: var(--radius-pill); color: var(--c-text-muted); text-decoration: none; font-weight: 600; transition: background var(--dur-1), color var(--dur-1); }
.nav-desktop a:hover { background: var(--c-surface-2); color: var(--c-text); }
.nav-desktop a[aria-current="page"] { background: var(--c-primary-soft); color: var(--c-primary); }
.icon-btn { position: relative; min-block-size: var(--touch); min-inline-size: var(--touch); display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2); padding-inline: var(--sp-2); border-radius: var(--radius-pill); color: var(--c-text); text-decoration: none; background: transparent; border: 0; font: inherit; font-weight: 600; cursor: pointer; transition: background var(--dur-1), transform var(--dur-1); }
.icon-btn:hover { background: var(--c-surface-2); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn .count { position: absolute; inset-block-start: 0.2rem; inset-inline-end: 0.2rem; min-inline-size: 1.15rem; block-size: 1.15rem; padding-inline: 0.25rem; border-radius: var(--radius-pill); background: var(--c-danger-solid); color: var(--c-on-danger); font-size: 0.7rem; font-weight: 800; display: grid; place-items: center; line-height: 1; }
.user-chip { display: none; align-items: center; gap: var(--sp-2); font-size: var(--fs-sm); font-weight: 600; color: var(--c-text-muted); padding-inline: var(--sp-2); }

.tabbar { position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 20; display: flex; justify-content: space-around; background: var(--c-glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-block-start: 1px solid var(--c-border); padding: var(--sp-1) var(--sp-2) calc(var(--sp-1) + env(safe-area-inset-bottom, 0px)); }
.tabbar a { flex: 1; max-inline-size: 7rem; min-block-size: 3.4rem; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.1rem; color: var(--c-text-muted); text-decoration: none; font-size: 0.72rem; font-weight: 600; border-radius: var(--radius-md); transition: color var(--dur-1), transform var(--dur-1); }
.tabbar a .ic { inline-size: 1.45rem; block-size: 1.45rem; transition: transform var(--dur-2) var(--ease-spring); }
.tabbar a:active { transform: scale(0.94); }
.tabbar a[aria-current="page"] { color: var(--c-primary); }
.tabbar a[aria-current="page"] .ic { transform: translateY(-2px) scale(1.12); }
body.has-tabbar { padding-block-end: calc(var(--tabbar-h) + env(safe-area-inset-bottom, 0px)); }

main { max-inline-size: var(--maxw); margin-inline: auto; padding: var(--sp-4); }
main:focus { outline: none; }
footer.site { text-align: center; padding: var(--sp-5) var(--sp-4); color: var(--c-text-muted); font-size: var(--fs-sm); }

@media (min-width: 768px) {
  .nav-desktop { display: flex; }
  .tabbar { display: none; }
  body.has-tabbar { padding-block-end: 0; }
  .user-chip { display: inline-flex; }
  main { padding: var(--sp-5) var(--sp-5) var(--sp-6); }
  h1 { font-size: var(--fs-xxl); }
}

/* ---------- Layout helpers ---------- */
.grid { display: grid; gap: var(--sp-4); grid-template-columns: minmax(0, 1fr); }
.grid-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-3); }
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-tiles { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-tiles { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .split { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); align-items: start; }
  .split > .sticky { position: sticky; inset-block-start: 5rem; }
}
.row { display: flex; gap: var(--sp-2); flex-wrap: wrap; align-items: center; }
.row-tight { gap: var(--sp-1); }
.between { justify-content: space-between; }
.end { justify-content: flex-end; }
.grow { flex: 1 1 12rem; min-inline-size: 0; }
.stack > * + * { margin-block-start: var(--sp-3); }
.stack-lg > * + * { margin-block-start: var(--sp-5); }
.narrow { max-width: 32rem; margin-inline: auto; }
.mt { margin-block-start: var(--sp-4); }
.mb0 { margin-block-end: 0; }

/* ---------- Buttons ---------- */
.btn {
  position: relative; min-block-size: var(--touch); padding: 0.55rem 1.1rem;
  border-radius: var(--radius-pill); border: 1.5px solid var(--c-border-strong);
  background: var(--c-surface); color: var(--c-text); font: inherit; font-weight: 700; line-height: 1.3;
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  text-decoration: none; user-select: none; -webkit-tap-highlight-color: transparent;
  transition: transform var(--dur-1) var(--ease), background var(--dur-1), border-color var(--dur-1), box-shadow var(--dur-2), color var(--dur-1);
}
.btn:hover { background: var(--c-surface-2); border-color: var(--c-primary); }
.btn:active { transform: scale(0.96); }
.btn-primary { background: var(--c-primary); color: var(--c-on-primary); border-color: transparent; box-shadow: var(--shadow-btn); }
.btn-primary:hover { background: var(--c-primary-strong); border-color: transparent; transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.96); box-shadow: none; }
.btn-accent { background: var(--c-accent); color: var(--c-on-accent); border-color: transparent; }
.btn-accent:hover { background: var(--c-accent-strong); border-color: transparent; }
.btn-wa { background: var(--c-wa); color: var(--c-on-wa); border-color: transparent; box-shadow: var(--shadow-btn); }
.btn-wa:hover { background: var(--c-wa-strong); color: var(--c-on-wa); border-color: transparent; }
.btn-soft { background: var(--c-primary-soft); color: var(--c-primary); border-color: transparent; }
.btn-soft:hover { background: var(--c-surface-3); border-color: transparent; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-primary-soft); border-color: transparent; }
.btn-danger { color: var(--c-danger); border-color: var(--c-danger); background: transparent; }
.btn-danger:hover { background: var(--c-danger-bg); border-color: var(--c-danger); }
.btn-danger-solid { background: var(--c-danger-solid); color: var(--c-on-danger); border-color: transparent; }
.btn-danger-solid:hover { background: var(--c-danger-solid); border-color: transparent; filter: brightness(0.92); }
.btn-block { inline-size: 100%; }
.btn-lg { font-size: var(--fs-lg); padding: 0.8rem 1.6rem; min-block-size: 3.25rem; }
.btn-sm { padding: 0.3rem 0.85rem; font-size: var(--fs-sm); }
.btn[aria-busy="true"] { pointer-events: none; color: transparent; }
.btn[aria-busy="true"]::after { content: ""; position: absolute; inline-size: 1.15rem; block-size: 1.15rem; border-radius: 50%; border: 2.5px solid var(--c-text-muted); border-block-start-color: transparent; animation: spin 0.7s linear infinite; }
.btn-primary[aria-busy="true"]::after, .btn-danger-solid[aria-busy="true"]::after { border-color: var(--c-on-primary); border-block-start-color: transparent; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* ---------- Forms ---------- */
label { display: block; font-weight: 700; font-size: var(--fs-sm); margin-block-end: var(--sp-1); }
.field { margin-block-end: var(--sp-3); min-inline-size: 0; }
.hint { font-size: var(--fs-xs); color: var(--c-text-muted); margin: var(--sp-1) 0 0; }
input, select, textarea {
  inline-size: 100%; min-block-size: 2.9rem; padding: 0.55rem 0.9rem;
  font: inherit; color: var(--c-text); background: var(--c-surface);
  border: 1.5px solid var(--c-border-strong); border-radius: var(--radius-sm);
  transition: border-color var(--dur-1), box-shadow var(--dur-1);
}
input::placeholder, textarea::placeholder { color: var(--c-text-muted); opacity: 0.75; }
input:hover, select:hover, textarea:hover { border-color: var(--c-primary); }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 4px var(--c-primary-soft); }
textarea { min-block-size: 5rem; resize: vertical; line-height: 1.6; }
input[type="checkbox"], input[type="radio"] { inline-size: 1.3rem; min-block-size: 1.3rem; block-size: 1.3rem; padding: 0; accent-color: var(--c-primary); flex: none; }
input[type="file"] { padding: 0.5rem; }
.check { display: flex; gap: var(--sp-2); align-items: center; font-weight: 500; font-size: var(--fs-md); min-block-size: var(--touch); margin: 0; cursor: pointer; }
.input-row { display: flex; gap: var(--sp-2); align-items: stretch; }
.input-row > input, .input-row > select { flex: 1; min-inline-size: 0; }
.w-sm { max-inline-size: 8rem; }

/* Switch: a checkbox drawn as a toggle */
.switch { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); min-block-size: var(--touch); padding-block: var(--sp-1); margin: 0; font-weight: 500; font-size: var(--fs-md); cursor: pointer; }
.switch > span > .hint { display: block; margin: 0; }
.switch input { appearance: none; -webkit-appearance: none; inline-size: 2.9rem; min-block-size: 0; block-size: 1.7rem; border-radius: var(--radius-pill); background: var(--c-border-strong); border: 0; position: relative; cursor: pointer; transition: background var(--dur-2); }
.switch input::after { content: ""; position: absolute; inset-block-start: 0.2rem; inset-inline-start: 0.2rem; inline-size: 1.3rem; block-size: 1.3rem; border-radius: 50%; background: var(--c-surface); box-shadow: var(--shadow-1); transition: inset-inline-start var(--dur-2) var(--ease-spring); }
.switch input:checked { background: var(--c-primary); }
.switch input:checked::after { inset-inline-start: 1.4rem; }
.switch input:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; box-shadow: none; }

/* Chip toggles: radios / checkboxes drawn as pills */
.chips { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.chips.scroll { flex-wrap: nowrap; overflow-x: auto; padding-block-end: var(--sp-1); scrollbar-width: none; margin-inline: calc(var(--sp-4) * -1); padding-inline: var(--sp-4); }
.chips.scroll::-webkit-scrollbar { display: none; }
.chip { display: inline-flex; align-items: center; gap: var(--sp-1); min-block-size: var(--touch); padding: 0.3rem 0.95rem; border-radius: var(--radius-pill); border: 1.5px solid var(--c-border-strong); background: var(--c-surface); color: var(--c-text); font: inherit; font-size: var(--fs-sm); font-weight: 600; cursor: pointer; white-space: nowrap; transition: background var(--dur-1), border-color var(--dur-1), color var(--dur-1), transform var(--dur-1); }
.chip:hover { border-color: var(--c-primary); }
.chip:active { transform: scale(0.95); }
.chip[aria-pressed="true"] { background: var(--c-primary); border-color: var(--c-primary); color: var(--c-on-primary); }

/* Star rating input */
.stars-input { display: inline-flex; flex-direction: row-reverse; gap: 0.1rem; }
.stars-input input { position: absolute; opacity: 0; inline-size: 1px; block-size: 1px; min-block-size: 0; }
.stars-input label { margin: 0; cursor: pointer; color: var(--c-border-strong); padding: 0.4rem; transition: color var(--dur-1), transform var(--dur-1) var(--ease-spring); }
.stars-input label .ic { inline-size: 2rem; block-size: 2rem; }
.stars-input label:hover, .stars-input label:hover ~ label, .stars-input input:checked ~ label { color: var(--c-accent-strong); }
.stars-input label:active { transform: scale(1.25); }
.stars-input input:focus-visible + label { outline: 3px solid var(--c-focus); border-radius: var(--radius-sm); }
.stars { color: var(--c-accent-strong); letter-spacing: 0.05em; }

@keyframes spin { to { transform: rotate(360deg); } }