/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --bg:          #0d0d0f;   /* app background (near-black) */
  --cell:        #1c1c1e;   /* a real day cell */
  --cell-hover:  #232326;   /* day cell on hover */
  --text:        #f4f4f5;   /* day numbers, month name */
  --text-dim:    #b5b5b5;   /* weekday labels, year */
  --hairline:    #26262a;   /* month divider rule */
  --today:       #7ad0e6;   /* accent (tabs, ovulation, etc.) */
  --period:      #e5564c;   /* a logged period day */
  --predicted:   #7a3b38;   /* a predicted period day (muted brick) */

  --fertile:            #2f7f96;   /* fertile window (past / confirmed cycles) */
  --fertile-predicted:  #1a3d48;   /* fertile window ahead of a predicted period */
  --ovulation:          #7ad0e6;   /* ovulation ring (past / confirmed cycles) */
  --ovulation-predicted:#3a6a78;   /* ovulation ring for predicted cycles */

  --col-gap:     6px;
  --pad:         12px;
  --radius:      9px;
  /* Home indicator only — opaque status bar (apple-mobile-web-app-status-bar-style: black) handles the top */
  --sab:         env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
}

body {
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Shell fills the viewport edges (no vh — avoids iOS PWA bottom gap). Tab bar inside. */
.app {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

/* ---- Weekday header ---- */
.weekdays {
  flex: 0 0 auto;
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--col-gap);
  padding: 14px var(--pad) 10px;
  background: var(--bg);
  border-bottom: 1px solid var(--hairline);
}
.weekdays span {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---- Scrolling month list ---- */
.calendar {
  flex: 1;
  min-height: 0;
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 0 var(--pad) 10vh;
  scrollbar-width: thin;
  scrollbar-color: var(--hairline) transparent;
}

.month { border-top: 1px solid var(--hairline); }
.month:first-child { border-top: none; }

.month__label {
  text-align: center;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 22px 0 16px;
}
.month__label .year {
  color: var(--text-dim);
  font-weight: 400;
  margin-left: 6px;
}

.month__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--col-gap);
}

.cell {
  position: relative;
  aspect-ratio: 1;
  background: var(--cell);
  border-radius: var(--radius);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 6px;
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: background 0.12s ease;
}
.cell:hover { background: var(--cell-hover); }

.cell--empty { background: transparent; cursor: default; }

.num { position: relative; z-index: 2; }

/* ---- Pill (shared geometry) -----------------------------------
   Period, predicted, and fertile days use segmented pills (one bar per
   cell; outside ends of a run rounded).
   ---------------------------------------------------------------- */
.pill {
  position: absolute;
  top: 0; bottom: 0; left: 0; right: 0;
  background: var(--period);
  z-index: 0;
}
.pill--segmented {
  /* stay inside the cell — no overlap into column gaps */
  left: 0;
  right: 0;
}
.pill--predicted { background: var(--predicted); }
.pill--fertile   { background: var(--fertile); }
.pill--fertile-predicted { background: var(--fertile-predicted); }

/* Flow heaviness: bar height from the bottom (logged days only). */
.pill--flow {
  top: auto;
  bottom: 0;
}
.pill--flow-light  { height: 33.333%; }
.pill--flow-medium { height: 66.666%; }
.pill--flow-heavy  { height: 100%; }
.pill--flow { overflow: hidden; }

/* Ovulation marker: a small ring near the top of the fertile cell,
   above the pill and clear of the day number at the bottom. */
.ovu {
  position: absolute;
  top: 18%;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2.5px solid var(--ovulation);
  box-sizing: border-box;
  z-index: 1;
  pointer-events: none;
}
.ovu--predicted { border-color: var(--ovulation-predicted); }

/* Excluded period: still a real logged pill, but marked "not counted"
   with a faint diagonal hatch. overflow:hidden clips the hatch to the
   pill's rounded shape. */
.pill--excluded { overflow: hidden; }
.pill--excluded::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    rgba(0, 0, 0, 0)        0,
    rgba(0, 0, 0, 0)        5px,
    rgba(0, 0, 0, 0.30)     5px,
    rgba(0, 0, 0, 0.30)     10px
  );
  pointer-events: none;
}

.pill--round-left  { border-top-left-radius: var(--radius);  border-bottom-left-radius: var(--radius); }
.pill--round-right { border-top-right-radius: var(--radius); border-bottom-right-radius: var(--radius); }
.pill--round-top-left  { border-top-left-radius: var(--radius); }
.pill--round-top-right { border-top-right-radius: var(--radius); }

/* Today is lifted above neighbours; pills stay inset per cell. */
.cell--today { z-index: 3; }
.cell--today .pill { left: 0; right: 0; }

/* Today ring, drawn above the pill so it stays visible on a day
   that is both today and a period/predicted day. With segmented pills,
   corner rounding follows the run (same as pill--round-left/right). */
.cell--today::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 0;
  box-shadow: inset 0 0 0 2px #fff;
  pointer-events: none;
  z-index: 1;
}
.cell--today:not(:has(.pill--segmented))::after {
  border-radius: var(--radius);
}
.cell--today:has(.pill--round-left)::after {
  border-top-left-radius: var(--radius);
  border-bottom-left-radius: var(--radius);
}
.cell--today:has(.pill--round-right)::after {
  border-top-right-radius: var(--radius);
  border-bottom-right-radius: var(--radius);
}

/* ---- Long-press menu (exclude / include a period) ---- */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.45);
}
.menu {
  position: fixed;
  z-index: 51;
  min-width: 220px;
  max-width: calc(100vw - 32px);
  background: #232326;
  border: 1px solid #34343a;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  color: var(--text);
}
.menu__title {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.menu__btn {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text);
  border: none;
  border-radius: 9px;
  padding: 11px 12px;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
}
.menu__btn:hover { background: #2e2e34; }
.menu__btn--exclude { color: #f0a24b; }   /* warm "discount" tone */
.menu__btn--include { color: var(--today); }

/* ---- Views + bottom tabs ---- */
.view {
  flex: 1;
  min-height: 0;                 /* let the inner scroll area shrink */
  display: flex;
  flex-direction: column;
}
.view[hidden] { display: none; }

.tabbar {
  flex: 0 0 auto;
  display: flex;
  border-top: 1px solid var(--hairline);
  background: var(--bg);
  padding-bottom: var(--sab);
}
.tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 9px 0 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  transition: color 0.12s ease;
}
.tab__icon { width: 24px; height: 24px; display: block; }
.tab__label { font-size: inherit; }
.tab--active { color: var(--today); }

/* ---- Log summary stats (last 6 cycles) ---- */
.stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 4px 4px 12px;
  padding: 0;
}
.stats__tiles {
  display: flex;
  align-items: stretch;
  gap: 10px;
}
.stats__note {
  text-align: center;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  line-height: 1.3;
}
.stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 0;
  padding: 12px 8px 10px;
  background: var(--cell);
  border-radius: var(--radius);
}
.stat__value {
  font-size: 1.65rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  line-height: 1;
}
.stat:nth-child(2) .stat__value { color: #ff7a72; }
.stat__unit {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-dim);
  margin-left: 2px;
}
.stat__label {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  text-align: center;
  line-height: 1.25;
}

/* ---- Log cycle bar legend ---- */
.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  margin: 8px 4px;
  padding: 12px;
  background: var(--cell);
  border-radius: var(--radius);
}
.legend__item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.78rem;
  color: var(--text);
}
.legend__swatch {
  width: 14px;
  height: 8px;
  border-radius: 2px;
  flex-shrink: 0;
}
.legend__swatch--bleed { background: var(--period); }
.legend__swatch--rest {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, 0.22);
}
.legend__swatch--fertile { background: var(--fertile); }
.legend__swatch--ov {
  width: 3px;
  height: 10px;
  border-radius: 2px;
  background: var(--ovulation);
}

/* ---- Log list ---- */
.log {
  flex: 1;
  min-height: 0;
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 8px var(--pad) 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--hairline) transparent;
}
.log__year {
  padding: 18px 4px 6px;
  font-size: 1.05rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.log__year ~ .log__year {
  padding-top: 22px;
}
.log__row {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--hairline);
}
.log__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.log__meta {
  display: flex;
  align-items: center;
  gap: 0.35em;
  min-width: 0;
  flex-wrap: wrap;
  font-size: 0.98rem;
}
.log__cycle-len {
  color: var(--text-dim);
  font-size: 0.98rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  flex-shrink: 0;
}
.log__cycle-len--current {
  color: var(--text);
  font-weight: 600;
}
.log__sep {
  color: var(--text-dim);
}
.log__range {
  min-width: 0;
}
.log__bleed {
  display: inline-flex;
  align-items: center;
  gap: 0.2em;
  font-size: 0.98rem;
  font-variant-numeric: tabular-nums;
  color: #ff7a72;
  white-space: nowrap;
  flex-shrink: 0;
}
.log__bleed-icon {
  width: 0.82em;
  height: 0.82em;
  flex-shrink: 0;
}
/* excluded periods: dimmed, with a small tag */
.log__row--excluded .log__meta { color: var(--text-dim); }
.log__row--excluded .log__bleed { opacity: 0.65; }
.log__row--excluded .log__cycle-len { opacity: 0.65; }
.log__badge {
  margin-left: 0.35em;
  font-size: 0.66rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #f0a24b;
  border: 1px solid #f0a24b;
  border-radius: 999px;
  padding: 1px 7px;
}

/* ---- Cycle bar (one per row): total length = cycle length,
   red segment = bleeding. Longest cycle across all rows = full width. */
.log__cycle {
  display: block;
}
.cyclebar {
  position: relative;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);   /* faint full-width track = the longest cycle */
}
.cyclebar--flow {
  height: 12px;
  border-radius: 6px;
}
.cyclebar--flow .cyclebar__fill { border-radius: 6px; }
.cyclebar__fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  display: flex;
  border-radius: 4px;
  overflow: hidden;
}
/* Period episode (start→end): one flex segment per calendar day so dry gaps show. */
.cyclebar__episode {
  display: flex;
  height: 100%;
  flex: 0 0 auto;
}
.cyclebar__seg { flex: 1; min-width: 0; height: 100%; }
.cyclebar__seg--bleed { background: var(--period); }
.cyclebar__seg--gap   { background: transparent; }
.cyclebar__seg--predicted { background: var(--predicted); }
/* Flow heaviness in the log episode (mirrors calendar fill + step rounding). */
.cyclebar__seg--flow-host {
  background: transparent;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.cyclebar__flow-fill {
  width: 100%;
  background: var(--period);
  overflow: hidden;
}
.cyclebar__seg--predicted .cyclebar__flow-fill { background: var(--predicted); }
.cyclebar__flow-fill--light  { height: 33.333%; }
.cyclebar__flow-fill--medium { height: 66.666%; }
.cyclebar__flow-fill--heavy  { height: 100%; }
.cyclebar__flow-fill--round-top-left  { border-top-left-radius: 3px; }
.cyclebar__flow-fill--round-top-right { border-top-right-radius: 3px; }
.cyclebar__gap-fill {
  width: 100%;
  height: 33.333%;
  background: color-mix(in srgb, var(--period) 28%, #2a2a30);
}
.cyclebar__rest {
  flex: 1;
  background: transparent;
  box-sizing: border-box;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  border-left: none;
  border-radius: 0 4px 4px 0;
}
.cyclebar--flow .cyclebar__rest { border-radius: 0 6px 6px 0; }
/* fertile window band: ov-fertileBefore .. ov+fertileAfter, on top of the rest */
.cyclebar__fertile {
  position: absolute;
  top: 0; bottom: 0;
  background: var(--fertile);
  border-radius: 2px;
}
.cyclebar__fertile--predicted { background: var(--fertile-predicted); }
/* ovulation marker: a thin blue tick at (cycle length - luteal) from the start */
.cyclebar__ov {
  position: absolute;
  top: -2px; bottom: -2px;
  width: 3px;
  border-radius: 2px;
  background: var(--ovulation);
  transform: translateX(-50%);
}
.cyclebar__ov--predicted { background: var(--ovulation-predicted); }
.log__row--excluded .cyclebar__fill,
.log__row--excluded .cyclebar__fertile,
.log__row--excluded .cyclebar__ov { opacity: 0.4; }

.log__show-all {
  display: block;
  width: 100%;
  margin: 8px 4px 20px;
  padding: 14px 12px;
  border: none;
  border-radius: var(--radius);
  background: var(--cell);
  color: var(--today);
  font-family: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 0.12s ease;
}
.log__show-all:hover { background: var(--cell-hover); }

.log__empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.6;
  padding: 15vh 24px 0;
}

/* ---- Settings ---- */
.settings {
  flex: 1;
  min-height: 0;
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 8px var(--pad) 24px;
}
.setrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--hairline);
}
.setrow__label { font-size: 0.98rem; }

/* toggle switch */
.switch { position: relative; flex: 0 0 auto; width: 46px; height: 28px; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch__track {
  position: absolute; inset: 0;
  background: #3a3a40;
  border-radius: 999px;
  transition: background 0.15s ease;
}
.switch__thumb {
  position: absolute; top: 3px; left: 3px;
  width: 22px; height: 22px;
  background: #f4f4f5;
  border-radius: 50%;
  transition: transform 0.15s ease;
}
.switch input:checked + .switch__track { background: var(--today); }
.switch input:checked + .switch__track .switch__thumb { transform: translateX(18px); }

/* segmented control */
.segmented {
  display: inline-flex;
  background: #1c1c1e;
  border-radius: 9px;
  padding: 3px;
}
.seg {
  border: none;
  background: transparent;
  color: var(--text-dim);
  padding: 7px 16px;
  border-radius: 7px;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}
.seg--active { background: #3a3a40; color: var(--text); }

/* backup & restore */
.setrow--stack { flex-direction: column; align-items: stretch; gap: 12px; }
.setrow__actions { display: flex; gap: 10px; }
.setbtn {
  flex: 1;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  background: #1c1c1e;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 0.12s ease;
}
.setbtn:hover { background: #232326; }
.setbtn--danger { color: #f0a24b; border-color: #3a2a20; }
.setnote { font-size: 0.8rem; color: var(--text-dim); }
.setnote--ok  { color: var(--today); }
.setnote--err { color: #f0a24b; }

/* brief how-to under the controls */
.tips {
  padding: 22px 4px 8px;
}
.tips__title {
  font-size: 0.98rem;
  margin-bottom: 10px;
}
.tips__list {
  margin: 0;
  padding-left: 1.15em;
  color: var(--text);
  font-size: 0.88rem;
  line-height: 1.45;
}
.tips__list li + li { margin-top: 8px; }