/* ---------- Tom · Teacher of Music ---------- */
/* Styled to the REAL musicTeacher app design language (tokens ported verbatim
   from the app's _tokens.scss / _base.scss). Same page layout, app surfaces. */

:root {
  /* 12-note colour system (app) */
  --note-C:  #E85C2A; --note-G:  #E87A2A; --note-D:  #E8A42A; --note-A:  #C8C830;
  --note-E:  #72C830; --note-B:  #2AB862; --note-Fs: #2AB8A8; --note-Db: #2A7AB8;
  --note-Ab: #2A4AB8; --note-Eb: #622AB8; --note-Bb: #A82AB8; --note-F:  #C8306A;

  /* Gold accent (the app's single non-note colour) */
  --gold:      #C9A227;
  --gold-text: #A88320;

  /* Surfaces */
  --page-bg:   #F5F5F5;
  --surface:   #FFFFFF;
  --border:    #E0E0E0;
  --hairline:  #ECECEC;
  --ring-sep:  #A8A8A8;

  /* Text */
  --ink:        #1A1A1A;
  --ink-2:      #6B6B6B;
  --label:      #6B6B6B;
  --label-soft: #9A9A9A;
  --hint:       #B8B8B8;

  /* Radius / shadow / motion */
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 14px;
  --sh-card: 0 2px 10px rgba(0,0,0,0.07), 0 0 0 1px rgba(0,0,0,0.04);
  --sh-pop:  0 4px 16px rgba(0,0,0,0.06);
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);

  /* Typography — Nunito throughout (the app uses one family) */
  --font-display: "Nunito", system-ui, sans-serif;
  --font-body:    "Nunito", system-ui, sans-serif;

  /* Layout */
  --gutter: clamp(20px, 4vw, 56px);
  --col: min(1180px, calc(100vw - var(--gutter) * 2));

  /* Legacy aliases — so inline HTML refs (nav, modality dots, diff) still resolve */
  --canvas: var(--page-bg);
  --rule: var(--border);
  --rule-soft: var(--hairline);
  --ink-soft: var(--ink-2);
  --ink-mute: var(--label-soft);
  --fsh: var(--note-Db); --gsh: var(--note-Ab); --ash: var(--note-Bb);
  --csh: var(--note-Eb); --g: var(--note-E);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--ink); color: #fff; }
img, svg { display: block; max-width: 100%; }

a {
  color: var(--gold-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: rgba(168, 131, 32, 0.4);
  transition: color .2s, text-decoration-color .2s;
}
a:hover { color: var(--ink); text-decoration-color: var(--ink); }
a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 6px; }

/* The app uses NO italics — emphasis is weight + colour, never slant */
em, i { font-style: normal; }
.beat-body em { font-weight: 700; color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: clamp(120px, 14vh, 180px) var(--gutter) clamp(60px, 8vh, 100px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.45fr);
  gap: 0;
  align-items: center;
  overflow: hidden;
}
.hero-copy { position: relative; z-index: 2; max-width: 560px; }

.eyebrow {
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.4px; text-transform: uppercase;
  color: var(--label);
  margin: 0 0 24px;
  display: flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ""; width: 24px; height: 2px; border-radius: 1px;
  background: var(--gold); display: inline-block;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(44px, 6.6vw, 92px);
  line-height: 1.02;
  letter-spacing: -1px;
  margin: 0 0 28px;
  color: var(--ink);
}
.hero h1 .line { display: block; }
.hero h1 .line-2 { color: var(--ink); }
.hero h1 .line-3 {
  display: block;
  font-size: 0.32em;
  font-weight: 600;
  letter-spacing: -0.2px;
  color: var(--ink-2);
  line-height: 1.3;
  margin-top: 20px;
  max-width: 20ch;
}

.hero-lede {
  font-size: 17px; font-weight: 500;
  line-height: 1.6; color: var(--ink-2);
  max-width: 52ch; margin: 0;
}
.hero-lede em { font-style: normal; font-weight: 700; color: var(--ink); }

.hero-visual {
  position: relative; z-index: 1;
  align-self: center; justify-self: start;
  width: 100%; max-width: 780px;
  aspect-ratio: 1 / 1;
  overflow: visible;
}
.hero-visual > svg { display: block; width: 100%; height: 100%; overflow: visible; }

/* ---------- Section frame ---------- */
.section { padding: clamp(72px, 11vh, 150px) var(--gutter); position: relative; }
.section-inner { width: var(--col); margin: 0 auto; }

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: clamp(20px, 4vw, 56px);
  align-items: baseline;
  margin-bottom: clamp(36px, 6vh, 64px);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.section-num {
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.4px; text-transform: uppercase;
  color: var(--label);
}
.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.5px;
  margin: 0;
  color: var(--ink);
}
.section-title em { font-style: normal; color: var(--gold-text); }

.section-opener {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.3px;
  color: var(--ink);
  max-width: 34ch;
  margin: 0 0 clamp(40px, 6vh, 72px);
}
.section-opener em { font-style: normal; color: var(--gold-text); }

/* ---------- Editorial body grid (app-styled blocks) ---------- */
.beat {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(20px, 4vw, 56px);
  padding: clamp(26px, 4vh, 44px) 0;
  border-top: 1px solid var(--hairline);
}
.beat:first-of-type { border-top: none; padding-top: 0; }
.beat-marker {
  font-size: 12px; font-weight: 700;
  letter-spacing: 0.4px; text-transform: uppercase;
  color: var(--label); padding-top: 4px;
}
.beat-body {
  max-width: 65ch;
  font-size: 16px; font-weight: 400;
  line-height: 1.6; color: var(--ink-2);
}
.beat-body p { margin: 0 0 1.1em; }
.beat-body p:last-child { margin-bottom: 0; }
.beat-body strong.lede {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1em;
  color: var(--ink);
  margin-bottom: 4px;
}
.beat-body strong.lede a { color: inherit; }

.section-close {
  margin-top: clamp(40px, 6vh, 72px);
  padding-top: clamp(24px, 4vh, 36px);
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.4;
  color: var(--ink);
  max-width: 52ch;
}
.section-close em { font-style: normal; color: var(--gold-text); }

/* ---------- Architecture diagram — app card ---------- */
.arch-wrap {
  margin: clamp(40px, 6vh, 72px) 0;
  padding: clamp(28px, 4vw, 48px) clamp(20px, 4vw, 40px);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--sh-card);
  position: relative;
}
.arch-caption {
  font-size: 13px; font-weight: 600;
  color: var(--label);
  margin-top: 18px; text-align: center;
}
.arch-svg { width: 100%; height: auto; }

/* ---------- App screen frames — live embeds of the real app ---------- */
.screen-frames {
  display: flex; flex-direction: column;
  gap: clamp(24px, 4vh, 44px);
  margin: clamp(28px, 4vh, 48px) 0 clamp(8px, 2vh, 16px);
}
.screen-frame {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--sh-card);
  overflow: hidden;
}
.screen-frame__bar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: var(--page-bg);
  border-bottom: 1px solid var(--hairline);
}
.screen-frame__dots { display: inline-flex; gap: 6px; flex: none; }
.screen-frame__dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); display: block; }
.screen-frame__name { font-family: var(--font-display); font-weight: 800; font-size: 14px; color: var(--ink); }
.screen-frame__tag {
  margin-left: auto; display: inline-flex; align-items: center; gap: 7px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--gold-text);
}
.screen-frame__tag::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--note-B);
  box-shadow: 0 0 0 3px rgba(42,184,98,0.18);
}
.screen-frame iframe {
  display: block; width: 100%; height: 680px; border: 0; background: var(--page-bg);
}
.screen-frame__cap {
  font-size: 13px; font-weight: 600; color: var(--label);
  margin: 0; padding: 14px 16px; border-top: 1px solid var(--hairline);
}
@media (max-width: 720px) {
  .screen-frame iframe { height: 540px; }
}

/* ---------- Multimodal stack list ---------- */
.stack-intro {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 1.7vw, 23px);
  line-height: 1.4;
  margin: 0 0 24px;
  color: var(--ink);
}
.stack-intro em { font-style: normal; color: var(--gold-text); }

.stack {
  list-style: none; margin: 6px 0 clamp(36px, 5vh, 56px); padding: 0;
  display: flex; flex-direction: column; gap: 12px;
}
/* Each row is the theory card, as a long rectangle: surface + border + shadow,
   the pip dot on the left, and a soft coloured blur (instead of a status pill). */
.stack li {
  position: relative; isolation: isolate; overflow: hidden;
  display: grid; grid-template-columns: 168px 1fr auto;
  gap: clamp(14px, 2vw, 28px); align-items: center;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--sh-card);
  padding: 18px 22px;
  color: var(--note-Db);
}
.stack li::before {
  content: ""; position: absolute; inset: -55% -20% auto auto;
  width: 42%; height: 210%; border-radius: 50%;
  filter: blur(40px); opacity: 0.18; z-index: -1; pointer-events: none;
  background: currentColor;
}
.stack li.is-partial::before { opacity: 0.11; }
.stack li.is-arch::before    { opacity: 0.06; }
.stack .modality {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(16px, 1.3vw, 19px); color: var(--ink);
}
.stack .modality .glyph {
  width: 11px; height: 11px; border-radius: 50%; flex: none; margin: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.12);
}
.stack .desc { font-size: 14px; font-weight: 500; line-height: 1.5; color: var(--ink-2); }

/* "Coming soon" — the app's Tom Hears toast pill, as a static badge */
.stack .soon {
  justify-self: end; align-self: center;
  background: var(--ink); color: #fff;
  font-size: 11px; font-weight: 700; letter-spacing: 0.02em;
  padding: 5px 12px; border-radius: 999px; white-space: nowrap;
}
.stack li.is-arch .modality { opacity: 0.86; }
.stack li.is-arch .desc { opacity: 0.92; }

.stack li.m-text    { color: var(--note-Db); }  .m-text    .glyph { background: var(--note-Db); }
.stack li.m-vision  { color: var(--note-Ab); }  .m-vision  .glyph { background: var(--note-Ab); }
.stack li.m-time    { color: var(--note-Bb); }  .m-time    .glyph { background: var(--note-Bb); }
.stack li.m-library { color: var(--gold);    }  .m-library .glyph { background: var(--gold); }
.stack li.m-score   { color: var(--note-C);  }  .m-score   .glyph { background: var(--note-C); }
.stack li.m-midi    { color: var(--note-Eb); }  .m-midi    .glyph { background: var(--note-Eb); }
.stack li.m-audio   { color: var(--note-E);  }  .m-audio   .glyph { background: var(--note-E); }

/* ---------- Pedagogy tiles (lifted from the app's theory-tile card) ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 6px 0 clamp(36px, 5vh, 56px);
}
@media (min-width: 760px) { .tiles { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.tile {
  position: relative; isolation: isolate; overflow: hidden;
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--sh-card);
  padding: 16px 16px 14px;
  display: flex; flex-direction: column; gap: 6px;
  min-height: 124px;
  color: var(--ink);
  transition: transform var(--ease-out) 150ms, box-shadow var(--ease-out) 150ms;
}
.tile:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.05); }
.tile__glow {
  position: absolute; inset: -36% -36% auto auto;
  width: 64%; height: 64%; border-radius: 50%;
  filter: blur(28px); opacity: 0.16; z-index: -1;
  pointer-events: none; background: currentColor;
}
.tile__head { display: flex; align-items: center; gap: 8px; margin-bottom: 2px; }
.tile__pip {
  width: 10px; height: 10px; border-radius: 50%; flex: none;
  background: currentColor; box-shadow: 0 1px 2px rgba(0,0,0,0.12);
}
.tile__status {
  margin-left: auto;
  font-size: 11px; font-weight: 700; letter-spacing: 0.4px; text-transform: uppercase;
  color: var(--ink-2); opacity: 0.85;
}
.tile__title { font-weight: 800; font-size: 16px; line-height: 1.25; color: var(--ink); }
.tile__desc { font-size: 13px; font-weight: 500; line-height: 1.4; color: var(--ink-2); flex: 1 1 auto; }

/* ---------- Sheet-music diff — app card ---------- */
.diff-wrap {
  margin: clamp(40px, 6vh, 72px) 0 0;
  padding: clamp(24px, 4vw, 40px) clamp(20px, 4vw, 36px);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xl);
  box-shadow: var(--sh-card);
}
.diff-svg { width: 100%; height: auto; }
.diff-legend {
  display: flex; flex-wrap: wrap; gap: 14px 26px; justify-content: center;
  margin-top: 20px;
  font-size: 12.5px; font-weight: 600; color: var(--ink-2);
}
.diff-legend span { display: inline-flex; align-items: center; gap: 8px; }
.diff-legend i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }

/* ---------- Footer ---------- */
.site-footer {
  padding: clamp(72px, 11vh, 130px) var(--gutter) 32px;
  text-align: center;
  font-size: 14px; font-weight: 600; color: var(--ink-2);
}
.site-footer .contact {
  display: inline-flex; align-items: center; gap: 14px;
  flex-wrap: wrap; justify-content: center;
}
.site-footer .dot {
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--label-soft); display: inline-block;
}
.back-home {
  display: block; margin: 56px auto 0;
  font-family: var(--font-display);
  font-weight: 700; font-size: 14px;
  color: var(--ink-2); text-decoration: none; width: max-content;
}
.back-home:hover { color: var(--ink); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr);
    gap: 0;
    padding-top: clamp(110px, 16vh, 160px);
  }
  .hero-visual { max-width: 340px; }
  .section-head { grid-template-columns: 1fr; gap: 12px; }
  .beat { grid-template-columns: 1fr; gap: 12px; }
  .beat-marker { padding-top: 0; }
}

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; gap: clamp(24px, 4vw, 48px); padding-top: 96px; }
  .hero-visual { max-width: 380px; order: 2; }
  .hero-copy { order: 1; }
  body { font-size: 15px; }
  .hero h1 { font-size: clamp(38px, 11vw, 60px); }
  .stack li { grid-template-columns: 1fr; gap: 6px; padding: 16px 18px; }
  .arch-wrap { padding: 22px 16px; }
}

@media (max-width: 420px) {
  .hero h1 { font-size: clamp(34px, 12vw, 50px); }
  .section { padding-top: 60px; padding-bottom: 60px; }
  .section-title { font-size: clamp(28px, 9vw, 44px); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001s !important; transition-duration: 0.01s !important; }
}