/* ==========================================================================
   HOUSE — base: reset, page frame, masthead, primitives
   ========================================================================== */

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

html {
  /* 1rem = 16px at 1194 × 834; scales with the smaller screen dimension so
     landscape and portrait share proportions. */
  font-size: clamp(13px, calc(0.6vw + 0.6vh + 4px), 20px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  height: 100%;
}

body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--t-body);
  line-height: 1.35;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  overscroll-behavior: none;
  transition: background-color var(--dur-3) var(--ease), color var(--dur-3) var(--ease);
}

button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; text-align: inherit; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
svg { display: block; flex: none; }
[hidden] { display: none !important; }

::selection { background: var(--live); color: var(--live-ink); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* — Type primitives ————————————————————————————————————————————— */
.meta {
  font-family: var(--font-mono);
  font-size: var(--t-meta);
  font-weight: var(--w-regular);
  letter-spacing: var(--track-meta);
  text-transform: uppercase;
  line-height: 1.2;
  color: var(--text-2);
}
.meta--accent { color: var(--accent); }
.num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); }

/* A marker highlight: the only way chartreuse appears behind text */
.live {
  background: var(--live);
  color: var(--live-ink);
  padding: 0.15em 0.4em 0.1em;
  margin-left: -0.05em;
  border-radius: var(--radius);
}

/* Calendar identity swatch */
.swatch {
  display: inline-block;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--c, var(--cal-shared));
  flex: none;
}
[data-owner="me"]      { --c: var(--cal-me); }
[data-owner="partner"] { --c: var(--cal-partner); }
[data-owner="shared"]  { --c: var(--cal-shared); }

/* — Page frame ——————————————————————————————————————————————————— */
.app {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  padding-top: env(safe-area-inset-top);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  column-gap: var(--gutter);
  padding-left: var(--margin);
  padding-right: var(--margin);
}

/* — Masthead —————————————————————————————————————————————————————— */
.masthead {
  height: var(--masthead);
  align-items: stretch;
  border-bottom: var(--hair) solid var(--rule);
  position: relative;
  z-index: 3;
  transition: border-color var(--dur-3) var(--ease);
}

.wordmark {
  grid-column: 1 / span 3;
  display: flex;
  align-items: center;
  gap: var(--s3);
  font-size: var(--t-small);
}
.wordmark { gap: var(--s2); }
.wordmark-mark {               /* hand-drawn, like a crayon note on the fridge */
  width: 2rem;
  height: 2rem;
  color: var(--text);
  margin: -0.3rem -0.1rem 0 -0.3rem;   /* optical: the drawing has air around it */
}
.wordmark-name {               /* heavy italic serif to match the crayon line */
  font-family: var(--font-serif);
  font-size: 1.625rem;
  font-style: italic;
  font-weight: 600;                 /* the one exception: it's a logo */
  letter-spacing: -0.02em;
  line-height: 1;
  margin-right: var(--s2);
}
.wordmark-time {
  font-family: var(--font-mono);
  font-size: var(--t-meta);
  font-weight: var(--w-regular);
  color: var(--text-2);
  opacity: 0;
  transform: translateY(2px);
  transition: opacity var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}
.app[data-view]:not([data-view="today"]) .wordmark-time { opacity: 1; transform: none; }

.nav {
  grid-column: 8 / -1;
  display: flex;
  align-items: stretch;
  gap: clamp(var(--s3), 1.9vw, var(--s5));
  padding-right: calc(var(--touch) + var(--s2)); /* room for settings */
  position: relative;
}
@media (max-width: 1150px) and (min-aspect-ratio: 1/1) { .nav-index { display: none; } }
.nav a {
  display: flex;
  align-items: center;
  gap: var(--s2);
  min-height: var(--touch);
  font-size: var(--t-small);
  font-weight: var(--w-regular);
  color: var(--text-3);
  transition: color var(--dur-1) var(--ease);
  position: relative;
}
.nav a::before {                 /* widen the touch target without moving type */
  content: "";
  position: absolute;
  inset: 0 calc(var(--s5) / -2);
}
.nav-index {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: var(--w-regular);
  letter-spacing: var(--track-meta);
  color: var(--text-3);
  transform: translateY(-0.35em);
}
.nav a[aria-current="page"] { color: var(--text); }
.nav a[aria-current="page"] .nav-index { color: var(--accent); }
.nav a:active { color: var(--text-2); }
@media (hover: hover) { .nav a:hover { color: var(--text); } }

.nav-bar {
  position: absolute;
  left: 0;
  bottom: calc(var(--hair) * -1);
  height: 2px;
  width: 1px;
  background: var(--accent);
  transform-origin: 0 0;
  transition: transform var(--dur-3) var(--ease);
  pointer-events: none;
}

.masthead-aside {
  position: absolute;
  right: var(--margin);
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
}

/* — Stage & views ————————————————————————————————————————————————— */
.stage {
  position: relative;
  overflow: hidden;
  touch-action: pan-y;
}
.view {
  position: absolute;
  inset: 0;
  overflow: hidden;
  will-change: opacity, transform;
}
.view[aria-hidden="true"] { visibility: hidden; pointer-events: none; }
.view-scroll {
  height: 100%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding-bottom: calc(var(--s6) + env(safe-area-inset-bottom));
}

/* — Controls ————————————————————————————————————————————————————— */
.press { transition: opacity var(--dur-press) linear, background-color var(--dur-1) var(--ease); }
.press:active { opacity: 0.5; }

.icon-button {
  width: var(--touch);
  height: var(--touch);
  display: grid;
  place-items: center;
  color: var(--text-2);
  margin-right: calc(var(--s3) * -1);
  border-radius: var(--radius);
}
.icon-button:active { background: var(--bg-press); }
@media (hover: hover) { .icon-button:hover { color: var(--text); } }

.text-button {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  min-height: var(--touch);
  font-size: var(--t-small);
  font-weight: var(--w-medium);
  color: var(--accent);
}
.text-button[disabled] { color: var(--text-3); cursor: default; }
.text-button:active:not([disabled]) { opacity: 0.5; }
@media (hover: hover) { .text-button:hover:not([disabled]) { text-decoration: underline; text-underline-offset: 0.25em; text-decoration-thickness: 1px; } }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s2);
  min-height: var(--touch);
  padding: 0 var(--s5);
  font-size: var(--t-small);
  font-weight: var(--w-medium);
  border: var(--hair) solid var(--text);
  border-radius: var(--radius);
  transition: background-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease), opacity var(--dur-press) linear;
}
.button:active { background: var(--bg-press); }
.button--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button--primary:active { background: var(--accent); opacity: 0.75; }
.button[disabled] { opacity: 0.4; pointer-events: none; }

/* Underlined field: a rule, not a box */
.field {
  width: 100%;
  min-height: var(--touch);
  padding: var(--s2) 0;
  font-size: max(16px, var(--t-body));   /* ≥16px stops iOS zoom-on-focus */
  background: transparent;
  border: 0;
  border-bottom: var(--hair) solid var(--rule);
  border-radius: 0;
  transition: border-color var(--dur-1) var(--ease);
  -webkit-appearance: none;
  appearance: none;
}
.field::placeholder { color: var(--text-3); }
.field:focus { border-bottom-color: var(--accent); outline: none; }

/* Check square */
.check {
  width: 1.75rem;
  height: 1.75rem;
  flex: none;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--text-2);
  border-radius: var(--radius);
  color: var(--accent-ink);
  transition: background-color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.check svg { opacity: 0; transform: scale(0.6); transition: opacity var(--dur-1) var(--ease), transform var(--dur-2) var(--ease); }
[aria-checked="true"] > .check,
.check[aria-checked="true"] { background: var(--accent); border-color: var(--accent); }
[aria-checked="true"] > .check svg,
.check[aria-checked="true"] svg { opacity: 1; transform: none; }

/* Segmented choice — text with an underline, no pills */
.choice { display: flex; gap: var(--s5); }
.choice button {
  min-height: var(--touch);
  font-size: var(--t-small);
  font-weight: var(--w-medium);
  color: var(--text-3);
  border-bottom: 2px solid transparent;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.choice button[aria-pressed="true"] { color: var(--text); border-bottom-color: var(--accent); }

/* — Toast ————————————————————————————————————————————————————————— */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--s6) + env(safe-area-inset-bottom));
  transform: translate(-50%, 1rem);
  display: flex;
  align-items: center;
  gap: var(--s5);
  min-height: var(--touch);
  padding: 0 var(--s3) 0 var(--s5);
  background: var(--ink);
  color: var(--paper);
  font-size: var(--t-small);
  border-radius: var(--radius);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
  z-index: 20;
}
.toast.is-shown { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast button { color: var(--live); font-weight: var(--w-medium); min-height: var(--touch); padding: 0 var(--s3); }

/* — Shared bits ——————————————————————————————————————————————————— */
.rule { border: 0; border-top: var(--hair) solid var(--rule); margin: 0; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s4);
  padding-bottom: var(--s3);
  border-bottom: var(--hair) solid var(--rule);
}
.empty { font-family: var(--font-serif); font-style: italic; color: var(--text-3); font-size: var(--t-lead); line-height: 1.25; letter-spacing: var(--track-serif); }
.tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: var(--w-regular);
  letter-spacing: var(--track-meta);
  text-transform: uppercase;
  padding: 0.2em 0.45em 0.15em;
  border: var(--hair) solid currentColor;
  border-radius: var(--radius);
  color: var(--text-2);
  white-space: nowrap;
}
.tag--live { background: var(--live); border-color: var(--live); color: var(--live-ink); }

.spinner-line {               /* loading: a hairline that sweeps, not a spinner */
  height: var(--hair);
  background: linear-gradient(90deg, transparent, var(--text-3), transparent);
  background-size: 40% 100%;
  background-repeat: no-repeat;
  animation: sweep 1.4s var(--ease) infinite;
}
@keyframes sweep { from { background-position: -40% 0; } to { background-position: 140% 0; } }