:root {
  color-scheme: light dark;
  --bg: #f4f3ef;
  --surface: #fbfaf7;
  --surface-2: #efede7;
  --border: #e2dfd7;
  --text: #1c1e22;
  --text-2: #4a4e56;
  --muted: #7a7e86;
  --accent: #1c1e22;
  --on-accent: #f4f3ef;
  --up: #2f7d5b;
  --up-bg: rgba(47, 125, 91, 0.1);
  --down: #b04a4a;
  --down-bg: rgba(176, 74, 74, 0.1);
  --flat-bg: rgba(122, 126, 134, 0.12);
  --grid: rgba(28, 30, 34, 0.07);
  --scrim: rgba(20, 22, 26, 0.35);
  --shadow: 0 1px 2px rgba(20, 22, 26, 0.04), 0 12px 32px rgba(20, 22, 26, 0.05);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1013;
    --surface: #14171b;
    --surface-2: #1a1e23;
    --border: #23282e;
    --text: #ecebe5;
    --text-2: #b9bcc2;
    --muted: #7f858d;
    --accent: #ecebe5;
    --on-accent: #0e1013;
    --up: #7cc4a0;
    --up-bg: rgba(124, 196, 160, 0.12);
    --down: #e09a9a;
    --down-bg: rgba(224, 154, 154, 0.12);
    --flat-bg: rgba(127, 133, 141, 0.16);
    --grid: rgba(236, 235, 229, 0.06);
    --scrim: rgba(0, 0, 0, 0.6);
    --shadow: none;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  font-feature-settings: "cv11", "ss03";
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, p { margin: 0; }
button, input { font: inherit; color: inherit; }
a { color: inherit; }

.icon { display: block; flex: none; }
.num { font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 14px;
  height: 64px; padding: 0 16px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
}
.topbar-title { font-size: 15px; font-weight: 500; letter-spacing: -0.01em; color: var(--text-2); }

.icon-btn {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: transparent; border: 1px solid transparent;
  color: var(--text); cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn:focus-visible, .btn:focus-visible, .seg button:focus-visible, .nav-link:focus-visible {
  outline: 2px solid var(--text-2); outline-offset: 2px;
}

/* ---------- drawer ---------- */
.scrim {
  position: fixed; inset: 0; z-index: 30;
  background: var(--scrim);
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.drawer {
  position: fixed; top: 0; bottom: 0; left: 0; z-index: 40;
  width: min(300px, 84vw);
  display: flex; flex-direction: column;
  padding: 12px 12px 24px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  transform: translateX(-102%); visibility: hidden;
  transition: transform 0.38s var(--ease), visibility 0.38s;
}
body.nav-open .scrim { opacity: 1; visibility: visible; }
body.nav-open .drawer { transform: none; visibility: visible; box-shadow: var(--shadow); }
body.nav-open { overflow: hidden; }

.drawer-head { display: flex; justify-content: flex-end; height: 52px; align-items: center; }
.nav { display: grid; gap: 4px; margin-top: 12px; }
.nav-link {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 14px; border-radius: 14px;
  text-decoration: none; color: var(--text-2);
  font-weight: 500; letter-spacing: -0.01em;
  transition: background 0.2s, color 0.2s;
}
.nav-link:hover { background: var(--surface-2); color: var(--text); }
.nav-link[aria-current="page"] { background: var(--surface-2); color: var(--text); }

/* ---------- page ---------- */
main { max-width: 760px; margin: 0 auto; padding: 8px 20px 72px; }
.page-head { margin: 20px 0 28px; }
.eyebrow {
  font-size: 12px; font-weight: 500; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--muted);
}
.hero {
  font-size: clamp(42px, 11vw, 68px); font-weight: 600; line-height: 1.05;
  margin: 10px 0 14px; letter-spacing: -0.035em;
}
.unit { font-size: 0.34em; font-weight: 500; color: var(--muted); margin-left: 0.5em; letter-spacing: 0.02em; }
.row-inline { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px 4px 8px; border-radius: 999px;
  font-size: 13px; font-weight: 500; font-variant-numeric: tabular-nums;
  background: var(--flat-bg); color: var(--text-2);
  white-space: nowrap;
}
.badge.up { background: var(--up-bg); color: var(--up); }
.badge.down { background: var(--down-bg); color: var(--down); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 22px; padding: 24px; box-shadow: var(--shadow);
}

/* ---------- segmented control ---------- */
.seg {
  display: inline-flex; padding: 3px; gap: 2px;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 14px;
}
.seg.full { display: flex; }
.seg.full button { flex: 1; }
.seg button {
  padding: 8px 16px; border: 0; border-radius: 11px;
  background: transparent; color: var(--muted);
  font-size: 13px; font-weight: 500; cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] {
  background: var(--surface); color: var(--text);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

/* ---------- chart ---------- */
.chart-card { padding: 20px 20px 16px; }
.chart-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.chart-wrap { position: relative; height: 300px; }
.empty { padding: 56px 12px; text-align: center; color: var(--muted); }
.empty a { color: var(--text); }

/* ---------- people cards ---------- */
.stack { display: grid; gap: 14px; }
.person { display: grid; gap: 14px; }
.person-top { display: flex; justify-content: space-between; align-items: baseline; }
.person-name { font-size: 16px; font-weight: 500; letter-spacing: -0.01em; }
.person-amount { font-size: clamp(34px, 9vw, 46px); font-weight: 600; line-height: 1.05; letter-spacing: -0.03em; }
.person-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; padding: 0 4px; color: var(--muted); font-size: 13px; }

/* ---------- forms ---------- */
.narrow { max-width: 420px; margin: 40px auto 0; text-align: center; }
.lock-ic {
  width: 52px; height: 52px; margin: 0 auto 18px;
  display: grid; place-items: center; border-radius: 16px;
  background: var(--surface-2); color: var(--text-2);
}
.narrow h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.02em; }
.narrow p.muted { margin: 6px 0 22px; }

.field { display: grid; gap: 8px; margin-bottom: 18px; text-align: left; }
.field label { font-size: 13px; font-weight: 500; color: var(--text-2); }
.input {
  width: 100%; height: 48px; padding: 0 14px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 14px;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
}
.input::placeholder { color: var(--muted); }
.input:focus { border-color: var(--text-2); box-shadow: 0 0 0 3px var(--flat-bg); }
.input-prefix { position: relative; }
.input-prefix span { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.input-prefix .input { padding-left: 52px; font-size: 20px; font-weight: 500; height: 56px; }
.input-prefix span { font-size: 13px; font-weight: 500; letter-spacing: 0.04em; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 22px; border-radius: 14px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  font-weight: 500; cursor: pointer; transition: opacity 0.2s, background 0.2s;
}
.btn:hover { background: var(--border); }
.btn.primary { background: var(--accent); color: var(--on-accent); border-color: transparent; width: 100%; }
.btn.primary:hover { opacity: 0.88; background: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn.ghost { background: transparent; }

.error { min-height: 20px; margin: 4px 0 12px; font-size: 13px; color: var(--down); text-align: left; }
.narrow .error { text-align: center; margin: 12px 0 0; }

.preview {
  margin: 4px 0 8px; padding: 12px 14px; border-radius: 14px;
  background: var(--surface-2); font-size: 13px; color: var(--text-2);
  display: flex; flex-wrap: wrap; gap: 6px 16px; text-align: left;
}
.preview b { font-weight: 500; color: var(--text); }
.preview .up { color: var(--up); } .preview .down { color: var(--down); }

.editor-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; gap: 12px; }
.section-title { margin: 36px 0 12px; font-size: 13px; font-weight: 500; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); }

.entries { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.entry {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: 16px;
  background: var(--surface); border: 1px solid var(--border);
}
.entry-ic { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; background: var(--surface-2); color: var(--text-2); flex: none; }
.entry-main { flex: 1; min-width: 0; }
.entry-title { font-weight: 500; letter-spacing: -0.01em; }
.entry-meta { font-size: 13px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.undo { font-size: 12px; gap: 6px; width: auto; padding: 0 10px; color: var(--muted); }
.undo.armed { background: var(--down-bg); color: var(--down); }
.entry .up { color: var(--up); } .entry .down { color: var(--down); }

.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 50;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  padding: 12px 18px; border-radius: 14px;
  background: var(--accent); color: var(--on-accent); font-size: 14px; font-weight: 500;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (min-width: 720px) {
  main { padding-top: 16px; }
  .card { padding: 30px; }
  .chart-card { padding: 24px 24px 18px; }
  .chart-wrap { height: 340px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}