:root {
  --bg: #f9f7f6;
  --card: #ffffff;
  --text: #17151a;
  --text2: #55515a;
  --muted: #8a8690;
  --line: #e7e3e6;
  --track: #f0edef;
  --period: #e87ba4;
  --period-ink: #b8356a;
  --fertile: #1baf7a;
  --water: #2a78d6;
  --sleep: #eda100;
  --migraine: #6250d6;
  --danger: #d03b3b;
  --shadow: 0 1px 2px rgba(30, 20, 30, .05), 0 6px 20px rgba(30, 20, 30, .05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131215;
    --card: #1f1d22;
    --text: #f1eef3;
    --text2: #c5c0ca;
    --muted: #8f8a96;
    --line: #322e37;
    --track: #2a272f;
    --period: #d55181;
    --period-ink: #f08fb3;
    --fertile: #199e70;
    --water: #3987e5;
    --sleep: #c98500;
    --migraine: #9085e9;
    --danger: #e66767;
    --shadow: none;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding: env(safe-area-inset-top) 0 calc(84px + env(safe-area-inset-bottom));
  overscroll-behavior-y: none;
}
h1, h2, h3, p { margin: 0; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

.top, main { max-width: 560px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; align-items: center; gap: 12px; padding-top: 18px; padding-bottom: 10px; }
.top .tt { flex: 1; min-width: 0; }
.top .iconbtn { flex: none; }
.top h1 { font-size: 26px; letter-spacing: -.02em; }
.top p { color: var(--muted); font-size: 14px; }
.iconbtn {
  width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--card); display: grid; place-items: center;
}
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.iconbtn svg { width: 22px; height: 22px; }

/* ---------- cards ---------- */
.card {
  background: var(--card); border-radius: 20px; padding: 16px; margin-bottom: 12px;
  box-shadow: var(--shadow); border: 1px solid var(--line);
}
.card h2 { font-size: 15px; font-weight: 650; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.card h2 .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c); flex: none; }
.card h2 small { margin-left: auto; font-weight: 400; color: var(--muted); font-size: 13px; }
.c-period { --c: var(--period); }
.c-water { --c: var(--water); }
.c-sleep { --c: var(--sleep); }
.c-migraine { --c: var(--migraine); }
.c-fertile { --c: var(--fertile); }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid2 .card { margin: 0; display: flex; flex-direction: column; }
.grid2 { margin-bottom: 12px; }
.grid2 .wide { grid-column: 1 / -1; }
.big { font-size: 28px; font-weight: 700; letter-spacing: -.02em; line-height: 1.1; }
.big small { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.sub { color: var(--text2); font-size: 13px; margin-top: 2px; }
.muted { color: var(--muted); font-size: 13px; }
.spacer { flex: 1; min-height: 10px; }

.btn {
  border: 1px solid var(--line); background: var(--card); border-radius: 14px;
  min-height: 44px; padding: 8px 14px; font-weight: 600; font-size: 15px;
}
.btn.block { width: 100%; }
.btn.primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn.soft { background: var(--track); border-color: transparent; }
.btn.danger { color: var(--danger); }
.btn:active, .chip:active, .cal button:active { transform: scale(.97); }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.row > .btn { flex: 1; }

.meter { height: 8px; border-radius: 4px; background: var(--track); overflow: hidden; margin-top: 8px; }
.meter b { display: block; height: 100%; background: var(--c); border-radius: 4px; }

/* ---------- hero ring ---------- */
.hero { text-align: center; }
.ring { width: min(64vw, 240px); height: auto; display: block; margin: 0 auto 4px; }
.ring circle { fill: none; stroke-width: 14; }
.ring .trk { stroke: var(--track); }
.ring .sp { stroke: var(--period); }
.ring .sf, .ring .pv { stroke: var(--fertile); }
.ring .mk { fill: var(--card); stroke: var(--text); stroke-width: 4; }
.ring text { fill: var(--text); stroke: none; text-anchor: middle; }
.ring .rk { font-size: 8.5px; fill: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.ring .rn { font-size: 36px; font-weight: 700; letter-spacing: -.03em; }
.ring .rn.sm { font-size: 28px; }
.ring .rp { font-size: 10px; fill: var(--text2); }
/* thin inner progress rings: water and sleep */
.ring .it, .ring .iw, .ring .is { stroke-width: 5; }
.ring .it { stroke: var(--track); }
.ring .iw { stroke: var(--water); stroke-linecap: round; }
.ring .is { stroke: var(--sleep); stroke-linecap: round; }
.hero .headline { font-size: 19px; font-weight: 650; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 14px; justify-content: center; margin: 10px 0 14px; font-size: 12px; color: var(--text2); }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; background: var(--c); display: inline-block; }
.legend i.o { background: none; border: 2px dashed var(--c); }
.legend i.d { width: 6px; height: 6px; border-radius: 50%; }
.legend i.l { width: 14px; height: 4px; border-radius: 2px; }
.legend i.m { border-radius: 50%; background: var(--card); border: 3px solid var(--text); }

.week { display: flex; justify-content: space-between; margin: 14px 0; }
.week span { display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 11px; color: var(--muted); flex: 1; }
.week i { width: 28px; height: 28px; border-radius: 50%; border: 2px solid var(--line); display: grid; place-items: center; font-style: normal; font-size: 14px; font-weight: 700; color: #fff; }
.week .on i { background: var(--fertile); border-color: var(--fertile); }

/* ---------- 30-day strip ---------- */
.strip { display: grid; grid-template-columns: 62px 1fr; gap: 7px 8px; align-items: center; }
.strip .lbl { font-size: 12px; color: var(--text2); }
.strip .cells { display: grid; grid-template-columns: repeat(30, 1fr); gap: 2px; }
.strip .cells i { aspect-ratio: 1 / 1.6; border-radius: 2px; background: var(--track); position: relative; overflow: hidden; }
.strip .cells i.v::after { content: ""; position: absolute; inset: 0; background: var(--c); opacity: var(--o, 1); }
.strip .axis { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }

/* ---------- bar charts ---------- */
.bars { display: flex; gap: 10px; align-items: stretch; height: 132px; margin-top: 6px; }
.bar { flex: 1; display: flex; flex-direction: column; align-items: center; min-width: 0; }
.bar .bv { font-size: 11px; color: var(--text2); height: 16px; white-space: nowrap; }
.bar .bt { flex: 1; width: 100%; position: relative; display: flex; align-items: flex-end; border-bottom: 1px solid var(--line); }
.bar .bt b { display: block; width: 100%; background: var(--c); border-radius: 4px 4px 0 0; min-height: 0; }
.bar .bl { font-size: 11px; color: var(--muted); margin-top: 4px; }
.bar.now .bl { color: var(--text); font-weight: 650; }
.bars.goal .bt::after { content: ""; position: absolute; left: -5px; right: -5px; bottom: var(--goal); border-top: 1px dashed var(--muted); }

.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tile { background: var(--track); border-radius: 14px; padding: 10px 12px; }
.tile .k { font-size: 12px; color: var(--text2); }
.tile .v { font-size: 20px; font-weight: 700; letter-spacing: -.01em; }
.tile .v small { font-size: 13px; font-weight: 500; color: var(--muted); }

/* ---------- calendar ---------- */
.calhead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.calhead strong { font-size: 17px; }
.calhead .iconbtn { width: 40px; height: 40px; }
.calhead .iconbtn svg { width: 18px; height: 18px; }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal .wd { text-align: center; font-size: 11px; color: var(--muted); padding: 4px 0; }
.cal button {
  aspect-ratio: 1; border-radius: 50%; border: 2px solid transparent; background: none;
  position: relative; font-size: 15px; padding: 0; display: grid; place-items: center;
}
.cal button.future { color: var(--muted); }
.cal button.today { border-color: var(--text); font-weight: 700; }
.cal button.p1, .cal button.p2, .cal button.p3 { background: var(--period); color: #fff; font-weight: 650; }
.cal button.p1 { background: color-mix(in srgb, var(--period) 60%, var(--card)); }
.cal button.p3 { background: color-mix(in srgb, var(--period) 100%, #000 12%); }
.cal button.pred { border: 2px dashed var(--period); }
.cal button.fert::after {
  content: ""; position: absolute; bottom: 4px; left: 50%; width: 6px; height: 6px; margin-left: -3px;
  border-radius: 50%; background: var(--fertile);
}
.cal button.ov::after { width: 10px; height: 10px; margin-left: -5px; bottom: 2px; background: none; border: 2px solid var(--fertile); }
.cal button .mg { position: absolute; top: 3px; right: 3px; width: 7px; height: 7px; background: var(--migraine); border-radius: 2px; outline: 2px solid var(--card); }

.cyc { display: grid; grid-template-columns: 96px 1fr 56px; gap: 8px; align-items: center; font-size: 13px; padding: 5px 0; }
.cyc .meter { margin: 0; }
.cyc span:last-child { text-align: right; color: var(--text2); }

/* ---------- lists ---------- */
.entry { display: block; width: 100%; text-align: left; background: none; border: 0; border-top: 1px solid var(--line); padding: 12px 0; }
.entry:first-of-type { border-top: 0; }
.entry .eh { display: flex; justify-content: space-between; gap: 8px; font-weight: 650; }
.entry .eh span { font-weight: 400; color: var(--text2); font-size: 13px; white-space: nowrap; }
.entry p { color: var(--text2); font-size: 14px; margin-top: 3px; }
.entry .meter { max-width: 160px; margin-top: 6px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.tags span { font-size: 12px; background: var(--track); border-radius: 999px; padding: 2px 9px; color: var(--text2); }
.empty { text-align: center; color: var(--muted); padding: 18px 8px; font-size: 14px; }
.note { font-size: 12px; color: var(--muted); padding: 0 4px 12px; }

/* ---------- forms ---------- */
label.f { display: block; font-size: 13px; color: var(--text2); margin: 12px 0 6px; }
input[type=text], input[type=number], input[type=date], input[type=time], textarea {
  width: 100%; min-height: 46px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg); padding: 10px 12px; font-size: 16px; -webkit-appearance: none; appearance: none;
}
textarea { min-height: 84px; resize: vertical; }
input[type=range] { width: 100%; accent-color: var(--migraine); height: 36px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--line); background: var(--card); border-radius: 999px;
  min-height: 40px; padding: 6px 14px; font-size: 14px;
}
.chip.on { background: var(--text); color: var(--bg); border-color: var(--text); }
.stars { display: flex; gap: 6px; }
.stars .chip { flex: 1; padding: 6px 0; }
.switch { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-top: 1px solid var(--line); }
.switch input { width: 22px; height: 22px; accent-color: var(--text); }

/* ---------- water ring ---------- */
.wring { width: min(56vw, 200px); display: block; margin: 0 auto 12px; }
.wring circle { fill: none; stroke-width: 14; }
.wring .trk { stroke: var(--track); }
.wring .val { stroke: var(--water); stroke-linecap: round; }
.wring text { fill: var(--text); stroke: none; text-anchor: middle; }
.wring .rn { font-size: 34px; font-weight: 700; letter-spacing: -.02em; }
.wring .rp { font-size: 12px; fill: var(--muted); }

/* ---------- tabs ---------- */
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5;
  display: flex; justify-content: center; gap: 2px;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
}
.tabs button {
  flex: 1; max-width: 110px; border: 0; background: none; color: var(--muted);
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  font-size: 11px; padding: 6px 0; border-radius: 12px; min-height: 50px;
}
.tabs button svg { width: 24px; height: 24px; }
.tabs button.on { color: var(--text); font-weight: 650; }
.tabs button.on svg { stroke-width: 2.2; }

/* ---------- sheet ---------- */
.backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .45); z-index: 10; }
.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 11;
  max-width: 560px; margin: 0 auto; max-height: 88vh; overflow-y: auto;
  background: var(--card); border-radius: 24px 24px 0 0;
  padding: 18px 16px calc(18px + env(safe-area-inset-bottom));
  animation: up .22s ease-out;
}
.sheet h2 { font-size: 20px; }
.sheet .sheethead { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 4px; }
.sheet .actions { display: flex; gap: 8px; margin-top: 18px; }
.sheet .actions .btn { flex: 1; }
@keyframes up { from { transform: translateY(30px); } to { transform: none; } }
@media (prefers-reduced-motion: reduce) { .sheet { animation: none; } }

.toast {
  position: fixed; left: 50%; bottom: calc(96px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px; font-size: 14px; z-index: 20;
  max-width: calc(100vw - 32px); text-align: center;
}
[hidden] { display: none !important; }