:root {
  --bg:#F1F2EE; --surface:#FBFCF8; --surface-2:#E5E8E1;
  --ink:#14181A; --ink-2:#5A625B; --ink-3:#868E85;
  --rule:#D6DAD1; --rule-strong:#B9BFB4;
  --accent:#0B6B5B; --warn:#9A6B12; --danger:#A8412A;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:#101312; --surface:#191D1A; --surface-2:#242923; --ink:#E9EBE4;
    --ink-2:#98A099; --ink-3:#78826F; --rule:#2A302A; --rule-strong:#3B423A;
    --accent:#4FB29A; --warn:#D9A046; --danger:#DE7B5F;
  }
}

:root[data-theme="dark"] {
  --bg:#101312; --surface:#191D1A; --surface-2:#242923; --ink:#E9EBE4;
  --ink-2:#98A099; --ink-3:#78826F; --rule:#2A302A; --rule-strong:#3B423A;
  --accent:#4FB29A; --warn:#D9A046; --danger:#DE7B5F;
}

* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink); font-family: "Zen Kaku Gothic New", sans-serif; }
body { min-height: 100vh; margin: 0; background: var(--bg); color: var(--ink); }
button, input, select { color: inherit; font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }

.app-header, main { width: min(100%, 460px); margin-inline: auto; }
.app-header { display: grid; grid-template-columns: 1fr auto; align-items: end; padding: 24px 20px 15px; border-bottom: 1px solid var(--rule-strong); }
.app-header .eyebrow { grid-column: 1; }
.app-header h1 { grid-column: 1; margin: 3px 0 0; font-size: 1.05rem; font-weight: 500; letter-spacing: .02em; }
.app-header .icon-button { grid-column: 2; grid-row: 1 / span 2; }
.eyebrow { margin: 0; color: var(--ink-3); font-family: "IBM Plex Mono", monospace; font-size: .68rem; font-weight: 500; letter-spacing: .13em; }
.icon-button, .text-button { padding: 7px 0; border: 0; background: transparent; color: var(--accent); font-weight: 700; }

main { padding: 0 20px calc(104px + env(safe-area-inset-bottom)); }
.screen { animation: enter .2s ease-out; }
.section-lead { padding: 34px 0 26px; border-bottom: 1px solid var(--rule); }
.section-lead.compact { padding-bottom: 18px; }
.section-lead h2, .target-header h2 { margin: 8px 0 8px; font-size: clamp(1.55rem, 7vw, 2.05rem); line-height: 1.25; }
.section-lead p:last-child { max-width: 35em; margin: 0; color: var(--ink-2); line-height: 1.75; }

form { margin: 0; }
fieldset { min-width: 0; margin: 0; padding: 26px 0; border: 0; border-bottom: 1px solid var(--rule); }
legend, .data-section h2 { padding: 0; font-size: 1rem; font-weight: 700; }
.field-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-top: 18px; }
.field-grid.two { grid-template-columns: 1fr 1.3fr; }
.field-grid label, .select-label { display: grid; gap: 8px; color: var(--ink-2); font-size: .78rem; }
.field-grid label span { display: flex; align-items: baseline; gap: 4px; color: var(--ink-3); }
input, select { min-width: 0; width: 100%; border: 0; border-bottom: 1px solid var(--rule-strong); border-radius: 0; background: transparent; font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
input { padding: 9px 2px; font-size: 1.08rem; }
select { padding: 11px 28px 11px 2px; }
.select-label { margin-top: 19px; }
.field-note, .form-error { margin: 8px 0 0; color: var(--warn); font-size: .78rem; line-height: 1.5; }
.form-error:empty { display: none; }
.primary-button, .small-primary { border: 1px solid var(--accent); background: var(--accent); color: var(--surface); font-weight: 700; }
.primary-button { width: 100%; margin-top: 22px; padding: 14px 18px; }
.small-primary { padding: 8px 13px; }

#plan-results { margin-top: 30px; }
.verdict { padding: 19px 0; border-block: 2px solid var(--accent); }
.verdict.warning { border-color: var(--warn); }
.verdict.impossible { border-color: var(--danger); }
.verdict .status { margin: 0 0 7px; color: var(--accent); font-size: 1.45rem; font-weight: 700; }
.verdict.warning .status { color: var(--warn); }
.verdict.impossible .status { color: var(--danger); }
.verdict p { margin: 5px 0; color: var(--ink-2); line-height: 1.55; }
.mono { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
.plans { margin-top: 16px; }
.plan-option { padding: 24px 0; border-bottom: 1px solid var(--rule-strong); }
.plan-option header { display: flex; align-items: baseline; justify-content: space-between; }
.plan-option h3 { margin: 0; font-size: 1.2rem; }
.strength { color: var(--ink-3); font-family: "IBM Plex Mono", monospace; letter-spacing: .16em; }
.strength .on { color: var(--accent); }
.plan-kcal { margin: 16px 0 3px; font-family: "IBM Plex Mono", monospace; font-size: 2rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.plan-kcal small { color: var(--ink-3); font-size: .72rem; font-weight: 500; }
.plan-macros { display: flex; gap: 18px; margin: 0; color: var(--ink-2); font-family: "IBM Plex Mono", monospace; font-size: .82rem; font-variant-numeric: tabular-nums; }
.plan-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 14px; margin: 18px 0 0; color: var(--ink-2); font-size: .78rem; }
.guard-copy { color: var(--warn); }
.plan-option .primary-button { margin-top: 18px; }

.target-header { padding: 32px 0 28px; border-bottom: 1px solid var(--rule-strong); }
.target-title-row { display: flex; align-items: flex-start; justify-content: space-between; }
.manual-badge { margin-top: 4px; padding: 3px 7px; border: 1px solid var(--warn); color: var(--warn); font-family: "IBM Plex Mono", monospace; font-size: .68rem; }
.target-number { display: block; width: 100%; margin: 22px 0 17px; padding: 0; border: 0; background: transparent; color: var(--ink); text-align: left; font-family: "IBM Plex Mono", monospace; font-size: clamp(3.15rem, 16vw, 4.25rem); font-weight: 600; line-height: 1; font-variant-numeric: tabular-nums; }
.target-number small { margin-left: 5px; color: var(--ink-3); font-size: .78rem; font-weight: 500; }
.macro-row { display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--rule); }
.macro-row button { display: grid; grid-template-columns: auto 1fr auto; align-items: baseline; gap: 6px; padding: 14px 10px; border: 0; border-right: 1px solid var(--rule); background: transparent; text-align: left; }
.macro-row button:last-child { border-right: 0; }
.macro-row small, .macro-row span { color: var(--ink-3); font-family: "IBM Plex Mono", monospace; font-size: .68rem; }
.macro-row strong { font-family: "IBM Plex Mono", monospace; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.inline-editor { margin-top: 18px; padding: 14px; background: var(--surface-2); }
.inline-editor label { display: flex; align-items: center; gap: 12px; }
.inline-editor input { font-size: 1.5rem; }
.inline-editor > div { display: flex; justify-content: flex-end; gap: 16px; margin-top: 10px; }
#reset-auto { margin-top: 10px; }

.weight-entry, .progress-section, .action-section, .notice-card, .data-section { padding: 26px 0; border-bottom: 1px solid var(--rule); }
.weight-entry h2, .action-section h2 { margin: 5px 0 0; font-size: 1.15rem; }
.weight-entry { display: grid; grid-template-columns: 1fr 1.3fr; gap: 18px; align-items: end; }
.weight-entry form { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 5px 10px; }
.weight-entry input[type="date"] { grid-column: 1 / -1; padding: 4px 0; color: var(--ink-2); font-size: .7rem; }
.weight-entry label { display: flex; align-items: baseline; }
.weight-entry label span { color: var(--ink-3); font-family: "IBM Plex Mono", monospace; font-size: .75rem; }
.weight-entry .primary-button { width: auto; margin: 0; padding: 10px 14px; white-space: nowrap; }
.weight-entry .form-error { grid-column: 1 / -1; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; }
.section-heading h2 { margin: 0; font-size: 1.15rem; }
.section-heading span { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
.progress-track { height: 3px; margin-top: 24px; overflow: hidden; background: var(--surface-2); }
.progress-track span { display: block; width: 0; height: 100%; background: var(--accent); transition: transform .25s ease; transform-origin: left; }
.progress-labels { display: flex; justify-content: space-between; margin-top: 8px; color: var(--ink-3); font-size: .66rem; }
.progress-labels b { color: var(--ink-2); font-family: "IBM Plex Mono", monospace; font-weight: 500; font-variant-numeric: tabular-nums; }
.pace-difference { margin: 19px 0 0; color: var(--ink-2); }
.choice-row { display: flex; gap: 8px; margin-top: 15px; }
.choice-row button, .range-switch button { flex: 1; padding: 9px 6px; border: 1px solid var(--rule-strong); background: transparent; font-size: .78rem; }
.notice-card h2 { margin: 0 0 8px; font-size: 1.1rem; }
.notice-card p { margin: 7px 0; color: var(--ink-2); }
.notice-card .primary-button { width: auto; padding: 9px 13px; }

.range-switch { display: flex; gap: 8px; margin: 20px 0 8px; }
.range-switch button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.chart-wrap { margin: 0; padding: 15px 0 21px; border-bottom: 1px solid var(--rule); }
.chart-wrap canvas { display: block; width: 100%; height: 270px; }
.chart-wrap figcaption { display: flex; gap: 18px; margin-top: 10px; color: var(--ink-3); font-family: "IBM Plex Mono", monospace; font-size: .67rem; }
.legend::before { content: ""; display: inline-block; width: 14px; height: 2px; margin: 0 6px 3px 0; background: var(--ink-3); }
.legend.plan::before { background: var(--ink-3); }
.legend.average::before { background: var(--accent); }
.legend.raw::before { width: 4px; height: 4px; border-radius: 50%; background: var(--ink-2); }
.water-note { margin: 16px 0 0; color: var(--ink-2); font-size: .78rem; line-height: 1.6; }
.data-section h2 { margin: 0 0 14px; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-family: "IBM Plex Mono", monospace; font-size: .72rem; font-variant-numeric: tabular-nums; }
th, td { padding: 9px 8px; border-bottom: 1px solid var(--rule); text-align: right; white-space: nowrap; }
th:first-child, td:first-child { padding-left: 0; text-align: left; }
.history-list { margin: 0; padding: 0; list-style: none; }
.history-list li { display: grid; grid-template-columns: 6.5em 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--rule); color: var(--ink-2); font-size: .78rem; }
.history-list time { font-family: "IBM Plex Mono", monospace; font-variant-numeric: tabular-nums; }
.empty-row { color: var(--ink-3); text-align: left; }

.bottom-tabs { position: fixed; z-index: 10; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(3, 1fr); width: min(100%, 460px); margin: auto; padding-bottom: env(safe-area-inset-bottom); border-top: 1px solid var(--rule-strong); background: var(--surface); }
.bottom-tabs button { padding: 12px 4px 10px; border: 0; background: transparent; color: var(--ink-3); font-size: .72rem; }
.bottom-tabs button span { display: block; margin-bottom: 2px; font-family: "IBM Plex Mono", monospace; font-size: .62rem; }
.bottom-tabs button[aria-current="page"] { color: var(--accent); }

dialog { width: min(calc(100% - 28px), 430px); max-height: calc(100vh - 36px); padding: 24px; overflow: auto; border: 1px solid var(--rule-strong); border-radius: 0; background: var(--surface); color: var(--ink); }
dialog::backdrop { background: color-mix(in srgb, var(--ink) 58%, transparent); }
dialog header { display: flex; align-items: start; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--rule); }
dialog h2 { margin: 5px 0 0; }
dialog section { padding: 20px 0; border-bottom: 1px solid var(--rule); }
dialog h3 { margin: 0 0 8px; font-size: .95rem; }
dialog p { color: var(--ink-2); font-size: .82rem; line-height: 1.65; }
.line-button, .danger-button { width: 100%; padding: 11px 0; border: 0; border-bottom: 1px solid var(--rule-strong); background: transparent; text-align: left; }
.danger-button { color: var(--danger); }
.first-dialog { padding: 30px 26px; }
.first-dialog h2 { margin: 8px 0 12px; font-size: 1.75rem; }

@keyframes enter { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
@media (max-width: 360px) {
  .field-grid { grid-template-columns: 1fr 1fr; }
  .weight-entry { grid-template-columns: 1fr; }
}