/* Luthora landing — tokens mirror the app's DESIGN.md */
:root {
  --canvas: #F3F2EE;
  --surface: #FFFFFF;
  --surface-alt: #ECEAE4;
  --ink: #1B1A17;
  --ink-muted: #6A665E;
  --ink-faint: #9A958B;
  --hairline: #E2DFD8;
  --brass: #80643D;
  --soon: #83642B;
  --due: #9E5527;
  --overdue: #8C2F2B;
  --good: #6A665E;
  --ring-track: #E2DFD8;
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --serif-ja: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", "YuMincho", "Noto Serif JP", "Newsreader", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Segoe UI", Roboto, "Noto Sans JP", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas: #0E0D0C;
    --surface: #181715;
    --surface-alt: #1F1E1B;
    --ink: #EDEAE3;
    --ink-muted: #A39E94;
    --ink-faint: #6E6A62;
    --hairline: #2A2825;
    --brass: #C8A56E;
    --soon: #CFA65A;
    --due: #DE8A55;
    --overdue: #D0675C;
    --good: #A39E94;
    --ring-track: #2A2825;
  }
}
:root[data-theme="dark"] {
  --canvas: #0E0D0C;
  --surface: #181715;
  --surface-alt: #1F1E1B;
  --ink: #EDEAE3;
  --ink-muted: #A39E94;
  --ink-faint: #6E6A62;
  --hairline: #2A2825;
  --brass: #C8A56E;
  --soon: #CFA65A;
  --due: #DE8A55;
  --overdue: #D0675C;
  --good: #A39E94;
  --ring-track: #2A2825;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
html[lang="en"] body { line-height: 1.6; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brass); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--brass) 45%, transparent); }
a:hover { border-bottom-color: var(--brass); }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; margin: 0 0 12px; }
h1 { font-size: 28px; letter-spacing: -0.4px; }
h2 { font-size: 22px; margin-top: 0; }
h3 { font-size: 17px; }
html[lang="ja"] h1, html[lang="ja"] h2 { font-family: var(--serif-ja); font-weight: 600; }
html[lang="en"] h1, html[lang="en"] h2 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.005em; }
html[lang="en"] h1 { font-size: 34px; }
html[lang="en"] h2 { font-size: 26px; }
p { margin: 0 0 14px; }
.muted { color: var(--ink-muted); }
.footnote { font-size: 13px; color: var(--ink-muted); }
.caption { font-size: 12px; letter-spacing: 0.2px; color: var(--ink-muted); }
.label { font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-muted); }
.num { font-family: var(--serif); font-variant-numeric: tabular-nums lining-nums; font-feature-settings: "tnum" 1, "lnum" 1; }
.wordmark { font-family: var(--serif); font-weight: 500; letter-spacing: 0.01em; }
hr.hair { border: 0; border-top: 1px solid var(--hairline); margin: 32px 0; }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 600px) { .wrap { padding: 0 24px; } }

/* header */
.site-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 0 14px; border-bottom: 1px solid var(--hairline); }
.site-head .brand { display: flex; align-items: center; gap: 10px; color: var(--ink); border: 0; }
.site-head .brand img { width: 28px; height: 28px; border-radius: 7px; }
.site-head .brand .wordmark { font-size: 21px; }
.site-head .brand small { font-size: 12px; color: var(--ink-muted); letter-spacing: 0.2px; margin-left: 2px; }
.site-head nav { display: flex; gap: 18px; font-size: 13px; }
.site-head nav a { color: var(--ink-muted); border: 0; }
.site-head nav a:hover { color: var(--ink); }

/* hero */
.hero { padding: 40px 0 28px; }
.hero .eyebrow { font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--brass); margin-bottom: 14px; }
.hero h1 { margin-bottom: 18px; }
.hero .lead { font-size: 17px; margin-bottom: 0; }
.hero .answer { margin-top: 22px; padding: 18px 20px; background: var(--surface); border: 1px solid var(--hairline); border-radius: 14px; }
.hero .answer p { margin: 0; }
.hero .answer .answer-k { display: block; font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-muted); margin-bottom: 6px; }
.hero-art { display: flex; gap: 10px; margin: 24px 0 0; padding: 0; list-style: none; }
.hero-art li { width: 52px; height: 52px; }

section { padding: 32px 0; }
section + section { border-top: 1px solid var(--hairline); }
.section-k { font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--brass); margin-bottom: 10px; }

/* line art via mask so it tints with ink in both themes */
.art { display: inline-block; background: var(--ink); -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-position: center; mask-position: center; -webkit-mask-size: contain; mask-size: contain; }
.art-electric_guitar { -webkit-mask-image: url(/luthora/img/art/electric_guitar.png); mask-image: url(/luthora/img/art/electric_guitar.png); }
.art-acoustic_guitar { -webkit-mask-image: url(/luthora/img/art/acoustic_guitar.png); mask-image: url(/luthora/img/art/acoustic_guitar.png); }
.art-classical_guitar { -webkit-mask-image: url(/luthora/img/art/classical_guitar.png); mask-image: url(/luthora/img/art/classical_guitar.png); }
.art-bass { -webkit-mask-image: url(/luthora/img/art/bass.png); mask-image: url(/luthora/img/art/bass.png); }
.art-ukulele { -webkit-mask-image: url(/luthora/img/art/ukulele.png); mask-image: url(/luthora/img/art/ukulele.png); }
.art-violin { -webkit-mask-image: url(/luthora/img/art/violin.png); mask-image: url(/luthora/img/art/violin.png); }
.art-cello { -webkit-mask-image: url(/luthora/img/art/cello.png); mask-image: url(/luthora/img/art/cello.png); }
.art-double_bass { -webkit-mask-image: url(/luthora/img/art/double_bass.png); mask-image: url(/luthora/img/art/double_bass.png); }
.art-mandolin { -webkit-mask-image: url(/luthora/img/art/mandolin.png); mask-image: url(/luthora/img/art/mandolin.png); }
.art-banjo { -webkit-mask-image: url(/luthora/img/art/banjo.png); mask-image: url(/luthora/img/art/banjo.png); }
.art-saxophone { -webkit-mask-image: url(/luthora/img/art/saxophone.png); mask-image: url(/luthora/img/art/saxophone.png); }
.art-clarinet { -webkit-mask-image: url(/luthora/img/art/clarinet.png); mask-image: url(/luthora/img/art/clarinet.png); }
.art-oboe { -webkit-mask-image: url(/luthora/img/art/oboe.png); mask-image: url(/luthora/img/art/oboe.png); }

/* calculator */
.calc { background: var(--surface); border: 1px solid var(--hairline); border-radius: 14px; padding: 20px 16px; }
@media (min-width: 600px) { .calc { padding: 24px; } }
.calc fieldset { border: 0; margin: 0 0 18px; padding: 0; min-width: 0; }
.calc legend { padding: 0; margin-bottom: 8px; font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; display: inline-flex; align-items: center; gap: 8px; }
.chip input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.chip span { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--hairline); background: var(--surface-alt); color: var(--ink); font-size: 15px; line-height: 1.3; cursor: pointer; transition: background-color 220ms cubic-bezier(.33,1,.68,1), border-color 220ms cubic-bezier(.33,1,.68,1); }
.chip span .art { width: 22px; height: 22px; }
.chip input:checked + span { background: var(--ink); color: var(--canvas); border-color: var(--ink); }
.chip input:checked + span .art { background: var(--canvas); }
.chip input:focus-visible + span { outline: 2px solid var(--brass); outline-offset: 2px; }
.chip.is-hidden { display: none; }
.field-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.field-row .val { font-size: 20px; }
.field-row .val small { font-family: var(--sans); font-size: 13px; color: var(--ink-muted); margin-left: 4px; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 28px; background: transparent; margin: 0; }
input[type="range"]::-webkit-slider-runnable-track { height: 2px; background: var(--hairline); border-radius: 1px; }
input[type="range"]::-moz-range-track { height: 2px; background: var(--hairline); border-radius: 1px; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: var(--surface); border: 1px solid var(--ink-faint); margin-top: -10px; box-shadow: 0 1px 2px rgba(0,0,0,.12); }
input[type="range"]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: var(--surface); border: 1px solid var(--ink-faint); box-shadow: 0 1px 2px rgba(0,0,0,.12); }
input[type="range"]:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; border-radius: 4px; }
input[type="date"] { font: inherit; font-size: 15px; color: var(--ink); background: var(--surface-alt); border: 1px solid var(--hairline); border-radius: 12px; padding: 7px 12px; min-height: 38px; color-scheme: light dark; }
input[type="date"]:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
.date-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.date-row .chip.is-hidden { display: none; }
.stepper { display: inline-flex; align-items: center; border: 1px solid var(--hairline); border-radius: 12px; background: var(--surface-alt); }
.stepper button { font: inherit; font-size: 20px; line-height: 1; width: 40px; height: 38px; border: 0; background: transparent; color: var(--ink); cursor: pointer; border-radius: 12px; }
.stepper button:focus-visible { outline: 2px solid var(--brass); outline-offset: -2px; }
.stepper output { min-width: 44px; text-align: center; font-size: 20px; }

/* result */
.result { display: grid; grid-template-columns: 112px 1fr; gap: 18px; align-items: center; margin-top: 8px; padding-top: 20px; border-top: 1px solid var(--hairline); }
@media (max-width: 380px) { .result { grid-template-columns: 96px 1fr; gap: 14px; } }
.ring { width: 112px; height: 112px; }
@media (max-width: 380px) { .ring { width: 96px; height: 96px; } }
.ring circle { fill: none; stroke-width: 6; }
.ring .track { stroke: var(--ring-track); }
.ring .arc { stroke: var(--good); stroke-linecap: butt; transform: rotate(-90deg); transform-origin: 50% 50%; transition: stroke-dashoffset 220ms cubic-bezier(.33,1,.68,1), stroke 220ms; }
@media (prefers-reduced-motion: reduce) { .ring .arc { transition: none; } }
.ring .mark { fill: var(--overdue); opacity: 0; }
.result[data-status="soon"] .arc { stroke: var(--soon); }
.result[data-status="due"] .arc { stroke: var(--due); }
.result[data-status="overdue"] .arc { stroke: var(--overdue); }
.result[data-status="overdue"] .mark { opacity: 1; }
.result .status { font-size: 15px; font-weight: 600; margin-bottom: 2px; }
.result[data-status="good"] .status { color: var(--good); }
.result[data-status="soon"] .status { color: var(--soon); }
.result[data-status="due"] .status { color: var(--due); }
.result[data-status="overdue"] .status { color: var(--overdue); }
.result .hero-num { font-size: 44px; line-height: 1.05; letter-spacing: -0.01em; }
.result .hero-num small { font-family: var(--sans); font-size: 15px; letter-spacing: 0; color: var(--ink-muted); margin-left: 6px; font-weight: 400; }
.result .hero-num small.pre { margin-left: 0; margin-right: 6px; }
.result .sub { font-size: 15px; color: var(--ink-muted); margin-top: 6px; }
.result .sub .num { color: var(--ink); }
.basis { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--hairline); font-size: 13px; color: var(--ink-muted); }
.basis .num { color: var(--ink); }
.conf { display: inline-block; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--hairline); font-size: 12px; letter-spacing: 0.2px; color: var(--ink-muted); margin-left: 4px; vertical-align: 1px; }

/* table */
.tbl { width: 100%; border-collapse: collapse; font-size: 15px; }
.tbl th, .tbl td { text-align: left; padding: 10px 8px 10px 0; border-bottom: 1px solid var(--hairline); vertical-align: top; }
.tbl th { font-weight: 500; font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-muted); }
.tbl td.n { white-space: nowrap; }
.tbl td .num { font-size: 17px; }
.tbl .conf { margin-left: 0; }
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* reeds */
.reed-result { margin-top: 8px; padding-top: 20px; border-top: 1px solid var(--hairline); display: grid; grid-template-columns: 1fr 1fr; gap: 16px 12px; }
.reed-result .k { font-size: 12px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-muted); margin-bottom: 4px; }
.reed-result .v { font-size: 34px; line-height: 1.1; }
.reed-result .v small { font-family: var(--sans); font-size: 14px; color: var(--ink-muted); margin-left: 4px; }
.reed-result .wide { grid-column: 1 / -1; font-size: 15px; color: var(--ink-muted); }
.reed-result .wide .num { color: var(--ink); }
.breakin { display: grid; grid-template-columns: repeat(10, 1fr); gap: 4px; margin-top: 12px; }
.breakin div { text-align: center; padding: 8px 0 6px; background: var(--surface-alt); border: 1px solid var(--hairline); border-radius: 8px; }
.breakin .d { font-size: 11px; letter-spacing: 0.2px; color: var(--ink-muted); }
.breakin .m { font-size: 17px; }
.breakin .m small { font-family: var(--sans); font-size: 10px; color: var(--ink-muted); }

/* prose lists */
.signs { list-style: none; padding: 0; margin: 0; }
.signs li { padding: 12px 0; border-top: 1px solid var(--hairline); display: grid; grid-template-columns: 24px 1fr; gap: 10px; }
.signs li:last-child { border-bottom: 1px solid var(--hairline); }
.signs li .n { font-family: var(--serif); color: var(--brass); font-size: 17px; line-height: 1.5; }
.signs li strong { display: block; font-weight: 600; }
.two { display: grid; gap: 24px; }
@media (min-width: 600px) { .two { grid-template-columns: 1fr 1fr; } }

/* app section */
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 20px 0; }
.shots figure { margin: 0; }
.shots img { width: 100%; border-radius: 12px; border: 1px solid var(--hairline); background: var(--surface); }
.shots figcaption { font-size: 12px; letter-spacing: 0.2px; color: var(--ink-muted); margin-top: 8px; text-align: center; }
@media (max-width: 480px) { .shots { grid-template-columns: 1fr; max-width: 300px; margin-left: auto; margin-right: auto; } }
.features { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 0; }
@media (min-width: 600px) { .features { grid-template-columns: 1fr 1fr; column-gap: 32px; } }
.features li { padding: 12px 0; border-top: 1px solid var(--hairline); font-size: 15px; }
.features li strong { display: block; font-weight: 600; font-size: 15px; }
.features li span { color: var(--ink-muted); }
.badge { display: inline-flex; align-items: center; gap: 10px; padding: 11px 18px; border-radius: 12px; background: var(--ink); color: var(--canvas); font-size: 15px; line-height: 1.3; margin-top: 24px; }
.badge svg { width: 20px; height: 20px; fill: currentColor; }
.badge small { display: block; font-size: 11px; letter-spacing: 0.8px; text-transform: uppercase; opacity: .7; }
.badge-note { font-size: 13px; color: var(--ink-muted); margin-top: 10px; }
.meta-line { font-size: 13px; color: var(--ink-muted); margin-top: 14px; }

/* faq */
.faq details { border-top: 1px solid var(--hairline); padding: 4px 0; }
.faq details:last-child { border-bottom: 1px solid var(--hairline); }
.faq summary { cursor: pointer; padding: 12px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--serif); color: var(--brass); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 12px; margin: 0; color: var(--ink-muted); }

/* footer */
.site-foot { border-top: 1px solid var(--hairline); padding: 28px 0 44px; font-size: 13px; color: var(--ink-muted); }
.site-foot .row { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 10px; }
.site-foot a { color: var(--ink-muted); border-bottom-color: var(--hairline); }
.site-foot a:hover { color: var(--ink); }
.theme-toggle { font: inherit; font-size: 12px; color: var(--ink-muted); background: transparent; border: 1px solid var(--hairline); border-radius: 999px; padding: 4px 12px; cursor: pointer; }
.theme-toggle:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* legend stays the fieldset's first child; the value sits on the same row */
.calc fieldset.has-val { position: relative; }
.calc fieldset.has-val > .val { position: absolute; right: 0; top: -6px; }
.calc fieldset.has-val > .stepper { position: absolute; right: 0; top: -10px; }
.calc fieldset.has-stepper { min-height: 40px; }

/* phone-width polish (2026-10-21 review) */
.site-head { gap: 12px; }
.site-head nav a { white-space: nowrap; }
.hero-art .art { width: 100%; height: 100%; }
.tbl .conf { white-space: nowrap; }
@media (max-width: 480px) {
  .site-head .brand small { display: none; }
  .site-head nav { gap: 14px; }
  .hero-art { gap: 8px; }
  .hero-art li { width: 44px; height: 44px; }
  .breakin { grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .breakin div { padding: 8px 0; }
}