:root {
  --bg: #F6EFE4;
  --ink: #3A2E27;
  --ink-soft: rgba(58, 46, 39, 0.6);
  --ink-faint: rgba(58, 46, 39, 0.45);
  --ink-ghost: rgba(58, 46, 39, 0.25);
  --primary: #C1440E;
  --today-bg: rgba(193, 68, 14, 0.05);
  --outline: rgba(138, 48, 9, 0.3);
  --divider: rgba(138, 48, 9, 0.12);
  --card: rgba(232, 165, 131, 0.22);
  --scrim: rgba(30, 22, 18, 0.4);
  --flow: #C1440E;
  --flow-small: #F0997B;
  --flow-medium: #D85A30;
  --flow-large: #993C1D;
  --pain: #D9A404;
  --prog: #534AB7;
  --dental: #3A8891;
  --save: #6B8F71;
  --danger: #B3261E;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #2A2420;
    --ink: #F6EFE4;
    --ink-soft: rgba(246, 239, 228, 0.6);
    --ink-faint: rgba(246, 239, 228, 0.45);
    --ink-ghost: rgba(246, 239, 228, 0.25);
    --primary: #E8A583;
    --today-bg: rgba(232, 165, 131, 0.07);
    --outline: rgba(246, 239, 228, 0.22);
    --divider: rgba(246, 239, 228, 0.08);
    --card: rgba(246, 239, 228, 0.06);
    --scrim: rgba(0, 0, 0, 0.55);
    --prog: #8C84E0;
    --dental: #5FB0B8;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.4 var(--sans);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
button {
  font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer;
}
button:focus-visible, textarea:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
#app { max-width: 560px; margin: 0 auto; min-height: 100%; }

.splash { display: grid; place-items: center; min-height: 100vh; }
.splash img { border-radius: 50%; opacity: 0.85; }

/* Sign in */
.signin {
  min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 24px; padding-bottom: calc(24px + env(safe-area-inset-bottom)); text-align: center;
}
.signin img { width: 96px; height: 96px; border-radius: 50%; }
.signin h1 { font: 400 34px var(--serif); margin: 18px 0 6px; }
.signin p { color: var(--ink-soft); margin: 0 0 28px; font-size: 15px; }
.signin .msg { margin-top: 16px; font-size: 14px; color: var(--ink-soft); max-width: 320px; }
.signin .msg.error { color: var(--danger); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 28px; border-radius: 28px; font-weight: 600; font-size: 15px;
  background: var(--save); color: #fff; width: 100%;
}
.btn:disabled { opacity: 0.6; cursor: default; }
.btn.google { width: auto; background: var(--primary); color: var(--bg); }
.btn.small { height: 40px; padding: 0 20px; font-size: 13px; }

/* Header */
.topbar {
  position: sticky; top: 0; z-index: 3; background: var(--bg);
  display: flex; align-items: center; justify-content: space-between;
  padding: calc(16px + env(safe-area-inset-top)) 24px 12px;
}
.topbar h1 { font: 400 28px var(--serif); margin: 0; }
.topbar .right { display: flex; align-items: center; gap: 14px; }
.status { font-size: 11px; color: var(--ink-faint); display: inline-flex; align-items: center; gap: 5px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--save); }
.status.offline::before { background: var(--pain); }
.link-btn { padding: 10px 4px; font-size: 12px; font-weight: 500; color: var(--ink-faint); }

/* Install card */
.install-tip { margin: 4px 24px 12px; padding: 14px; background: var(--card); border-radius: 14px;
  font-size: 13px; color: var(--ink-soft); line-height: 1.45; }
.install-tip p { margin: 0 0 10px; }
.install-tip b { color: var(--ink); }
.install-tip .row { display: flex; align-items: center; gap: 6px; }
.install-tip .btn { width: auto; }
.install-tip .link-btn { padding: 10px 12px; font-size: 13px; font-weight: 600; color: var(--ink-soft); }

/* Day list */
.month {
  position: sticky; top: var(--topbar-h, 64px); z-index: 2; background: var(--bg);
  font: 600 14px var(--serif); padding: 10px 24px; margin: 0;
}
.day {
  display: flex; align-items: center; width: 100%; text-align: left;
  padding: 14px 24px; min-height: 64px; position: relative;
}
.day::after {
  content: ""; position: absolute; left: 24px; right: 24px; bottom: 0; height: 1px; background: var(--divider);
}
@media (hover: hover) { .day:hover { background: var(--today-bg); } }
.day:active { background: var(--today-bg); }
.day.today { background: var(--today-bg); }
.day .date { width: 56px; flex: none; }
.day .dow { display: block; font-size: 11px; font-weight: 500; letter-spacing: 0.04em; color: var(--ink-faint); }
.day .num { display: block; font: 400 18px var(--serif); }
.day.today .num { color: var(--primary); }
.day .summary { margin-left: 16px; display: flex; align-items: center; gap: 6px; }
.day .empty { margin-left: 16px; color: var(--ink-ghost); }
.day.today .empty { color: var(--ink-soft); }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.list-end { height: 1px; }
.list-foot { padding: 24px; text-align: center; font-size: 12px; color: var(--ink-ghost);
  padding-bottom: calc(24px + env(safe-area-inset-bottom)); }

/* Bottom sheet */
.scrim {
  position: fixed; inset: 0; background: var(--scrim); z-index: 10;
  opacity: 0; transition: opacity 0.2s;
}
.scrim.show { opacity: 1; }
.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 11; margin: 0 auto; max-width: 560px;
  background: var(--bg); border-radius: 28px 28px 0 0; max-height: 92vh; max-height: 92dvh; overflow-y: auto;
  padding: 10px 24px calc(16px + env(safe-area-inset-bottom));
  transform: translateY(100%); transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  overscroll-behavior: contain;
}
.sheet.show { transform: none; }
.handle { width: 32px; height: 4px; border-radius: 2px; background: var(--outline); margin: 0 auto 18px; }
.sheet h2 { font: 400 20px var(--serif); margin: 0; }
.label { font-size: 11px; font-weight: 500; color: var(--ink-soft); margin: 20px 0 6px; }
.row4, .row3 { display: grid; gap: 8px; }
.row4 { grid-template-columns: repeat(4, 1fr); }
.row3 { grid-template-columns: repeat(3, 1fr); }
.chip {
  border: 1px solid var(--outline); border-radius: 16px; padding: 12px 0;
  display: flex; align-items: center; justify-content: center; gap: 3px; min-height: 46px;
  transition: background 0.12s, border-color 0.12s;
}
.chip.dental { border-radius: 14px; padding: 10px 0; font-size: 13px; font-weight: 500; min-height: 42px; }
.chip.dental[aria-pressed="true"] { border-color: var(--dental); color: var(--dental); background: color-mix(in srgb, var(--dental) 12%, transparent); }
.chip.flow[aria-checked="true"] { border-color: var(--flow); background: color-mix(in srgb, var(--flow) 12%, transparent); }
.chip.pain[aria-checked="true"] { border-color: var(--pain); background: color-mix(in srgb, var(--pain) 15%, transparent); }
.chip svg { display: block; }
.pdot { width: 8px; height: 8px; border-radius: 50%; background: var(--pain); }
.pdot.hollow { background: none; border: 1px solid color-mix(in srgb, var(--pain) 50%, transparent); }
.toggle {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  border: 1px solid var(--outline); border-radius: 16px; padding: 12px 16px; text-align: left;
}
.toggle .knob { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid color-mix(in srgb, var(--prog) 60%, transparent); }
.toggle[aria-checked="true"] { border-color: var(--prog); background: color-mix(in srgb, var(--prog) 12%, transparent); }
.toggle[aria-checked="true"] .knob { background: var(--prog); border-color: transparent; }
.field { margin-top: 20px; }
.field textarea {
  width: 100%; min-height: 56px; resize: vertical; font: inherit; color: var(--ink);
  background: transparent; border: 1px solid var(--outline); border-radius: 16px; padding: 14px 16px;
  caret-color: var(--flow);
}
.field textarea:focus { outline: none; border: 2px solid var(--flow); padding: 13px 15px; }
.field textarea::placeholder { color: var(--ink-faint); }
.sheet .btn { margin-top: 24px; margin-bottom: 8px; }
.delete-link { display: block; width: 100%; text-align: center; padding: 16px 0; font-size: 12px; font-weight: 500;
  color: var(--danger); opacity: 0.85; }

/* Dialog */
.dialog {
  position: fixed; z-index: 21; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(312px, calc(100vw - 48px)); background: var(--bg); border-radius: 28px; padding: 24px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}
.dialog h3 { margin: 0 0 12px; font: 400 22px var(--serif); }
.dialog p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.dialog .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.dialog .actions button { padding: 10px 12px; border-radius: 20px; font-weight: 600; font-size: 14px; color: var(--primary); }
.dialog .actions .danger { color: var(--danger); }
.scrim.dialog-scrim { z-index: 20; }

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 20px; font-size: 13px; z-index: 30;
  max-width: calc(100vw - 32px);
}

@media (prefers-reduced-motion: reduce) {
  .sheet, .scrim { transition: none; }
}