/* Tuner Hippo — phosphor terminal design system
   Clash Display (display) + Satoshi (body), via Fontshare
   #0a0e0a bg / #d4ff3f accent / #e8ffe8 text
   Split panel: tuner fixed left, content scrolls right.
   Pill-rounded controls, soft shadows, glassy cards. */

:root {
  --bg: #0a0e0a;
  --panel: rgba(232, 255, 232, 0.04);
  --panel-solid: #111710;
  --line: rgba(212, 255, 63, 0.16);
  --line-soft: rgba(232, 255, 232, 0.09);
  --text: #e8ffe8;
  --muted: #9db89a;
  --faint: #647a62;
  --accent: #d4ff3f;
  --accent-ink: #131a05;
  --warn: #ffb03f;
  --bad: #ff5f4f;
  --r-pill: 999px;
  --r-card: 18px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --glow: 0 0 14px rgba(212, 255, 63, 0.35);
  --display: "Clash Display", "Archivo Black", sans-serif;
  --body: "Satoshi", -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%,
    rgba(212, 255, 63, 0.06), transparent);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display { font-family: var(--display); font-weight: 600; line-height: 1.12; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.num { font-variant-numeric: tabular-nums; }
code {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: 6px; padding: 0.05em 0.4em; font-size: 0.9em;
}

/* ---------- top navigation ---------- */

.topnav {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line-soft);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.topnav .brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none; flex: 0 0 auto;
}
.topnav .brand:hover { text-decoration: none; }
.brand-name { font-family: var(--display); font-weight: 700; font-size: 1.05rem; letter-spacing: 0.01em; }
.brand-name em { color: var(--accent); font-style: normal; text-shadow: var(--glow); }
.topnav .links { display: flex; gap: 4px; margin-left: auto; flex: 0 0 auto; }
.topnav .links a {
  color: var(--muted); font-size: 0.85rem; font-weight: 500;
  padding: 6px 13px; border-radius: var(--r-pill); white-space: nowrap;
}
.topnav .links a:hover { color: var(--accent); text-decoration: none; background: var(--panel); }
.topnav .links a.here { background: var(--panel); color: var(--text); border: 1px solid var(--line-soft); }

/* ---------- editorial layout (home) ---------- */

.wrap-ed { max-width: 840px; margin: 0 auto; padding: 0 18px 64px; }
.masthead {
  text-align: center;
  padding: 30px 0 24px;
  border-bottom: 2px solid var(--line);
}
.kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  padding: 4px 13px;
  margin-bottom: 14px;
}
.masthead h1 { font-size: 3.1rem; font-weight: 700; margin: 0; text-shadow: 0 0 30px rgba(212,255,63,0.15); }
.masthead .dek { color: var(--muted); max-width: 38em; margin: 12px auto 0; font-size: 1.03rem; }
@media (min-width: 560px) { .masthead h1 { font-size: 3.7rem; } }

.instrument {
  border: 2px solid var(--line);
  border-radius: var(--r-card);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin: 28px 0 12px;
}
.figcap {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 18px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.instrument-body { padding: 18px 14px 22px; }
@media (min-width: 560px) { .instrument-body { padding: 26px 28px 30px; } }

.content-ed { padding-top: 8px; }
.content-ed h2 { font-size: 1.5rem; margin: 44px 0 12px; text-align: center; }
.content-ed > p, .content-ed section > p { color: var(--muted); }

/* ---------- split layout ---------- */

.split { display: grid; grid-template-columns: 1fr; min-height: calc(100vh - 57px); }
.tool-pane { padding: 18px 16px 30px; border-bottom: 1px solid var(--line-soft); }
.content-pane { padding: 30px 16px 48px; max-width: 780px; }

@media (min-width: 1020px) {
  .split { grid-template-columns: minmax(470px, 47%) 1fr; }
  .tool-pane {
    position: sticky; top: 0; height: calc(100vh);
    overflow-y: auto; border-bottom: none;
    border-right: 1px solid var(--line-soft);
    padding: 24px 26px 40px;
  }
  .content-pane { padding: 44px 48px 64px; }
}

/* ---------- glass cards ---------- */

.card-glass {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* ---------- readout ---------- */

.readout { padding: 20px 16px 16px; text-align: center; margin-bottom: 12px; }
.readout .note-row { display: flex; align-items: baseline; justify-content: center; gap: 6px; min-height: 96px; }
.note-name {
  font-family: var(--display); font-weight: 700; font-size: 5.4rem; line-height: 1;
  color: var(--text);
}
.readout.locked .note-name { color: var(--accent); text-shadow: var(--glow); }
.readout.idle .note-name, .readout.idle .hz-val { color: var(--faint); }
.note-oct { font-family: var(--display); font-size: 2rem; color: var(--muted); }
.hz-row { margin-top: 4px; font-size: 1.1rem; }
.hz-row .unit { color: var(--muted); font-size: 0.82rem; margin-left: 3px; }
.cents-label { font-size: 0.88rem; color: var(--muted); min-height: 1.4em; margin-top: 2px; }
.cents-label.off { color: var(--warn); }
.cents-label.in-tune { color: var(--accent); }
.target-label { font-size: 0.8rem; color: var(--faint); min-height: 1.3em; }

.meter-wrap { margin-top: 10px; }
.meter-wrap svg { width: 100%; height: auto; display: block; }
.strobe-wrap { margin-top: 12px; display: none; }
.strobe-wrap canvas {
  width: 100%; height: 54px; display: block;
  background: var(--bg); border: 1px solid var(--line-soft); border-radius: 12px;
}
.view-toggle { display: flex; gap: 6px; justify-content: center; margin-top: 12px; }

/* ---------- chips & pills ---------- */

.chip {
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  color: var(--muted);
  font-family: var(--body);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 7px 14px;
  cursor: pointer;
}
.chip:hover { color: var(--text); border-color: var(--line); }
.chip[aria-pressed="true"] {
  background: var(--accent); color: var(--accent-ink);
  border-color: var(--accent); font-weight: 700;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }

.btn {
  display: block; width: 100%;
  background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: var(--r-pill);
  font-family: var(--display); font-weight: 700; font-size: 1.05rem;
  padding: 14px 20px; cursor: pointer;
  box-shadow: 0 6px 20px rgba(212, 255, 63, 0.25);
}
.btn:hover { filter: brightness(1.08); }
.btn.stop { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); box-shadow: none; }
.btn-ghost {
  background: transparent; border: 1px solid var(--line-soft);
  border-radius: var(--r-pill); color: var(--text);
  font-family: var(--body); font-size: 0.82rem; font-weight: 500;
  padding: 8px 14px; cursor: pointer;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost:disabled { opacity: 0.4; cursor: default; }
button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

/* ---------- instrument + strings ---------- */

.section-label {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--faint); margin: 16px 0 8px;
}
select.tuning-select {
  width: 100%;
  background: var(--panel-solid);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  color: var(--text);
  font-family: var(--body); font-size: 0.9rem;
  padding: 9px 14px;
  appearance: none;
  -webkit-appearance: none;
}

.strings { display: flex; gap: 7px; margin-top: 10px; }
.string-btn {
  flex: 1; min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  color: var(--text);
  font-family: var(--display); font-weight: 600; font-size: 1.05rem;
  padding: 12px 2px 8px;
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow);
}
.string-btn small { display: block; font-family: var(--body); font-weight: 400; font-size: 0.62rem; color: var(--faint); }
.string-btn.near { border-color: var(--accent); color: var(--accent); }
.string-btn.selected { background: rgba(212, 255, 63, 0.12); border-color: var(--accent); }
.string-btn.tuned::after {
  content: "✓";
  position: absolute; top: -7px; right: -2px;
  background: var(--accent); color: var(--accent-ink);
  font-size: 0.62rem; font-weight: 700;
  width: 17px; height: 17px; line-height: 17px;
  border-radius: 50%;
}

.mode-row { display: flex; gap: 6px; justify-content: center; margin-top: 12px; }
.hint { font-size: 0.78rem; color: var(--muted); text-align: center; margin: 10px 0 0; }
.err {
  background: rgba(255, 95, 79, 0.08);
  border: 1px solid var(--bad); border-radius: 14px;
  color: var(--bad); font-size: 0.85rem;
  padding: 10px 14px; margin-top: 12px; display: none;
}
.err.show { display: block; }

.field-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.field-row label { font-size: 0.8rem; font-weight: 500; color: var(--muted); white-space: nowrap; }
.field-row input[type="range"] { flex: 1; accent-color: var(--accent); min-width: 0; }
.field-row input[type="number"] {
  background: var(--panel-solid); border: 1px solid var(--line-soft);
  border-radius: var(--r-pill); color: var(--text);
  font-family: var(--body); font-size: 0.9rem; padding: 7px 12px; width: 84px;
}

/* scope */
.scope-wrap {
  padding: 10px;
  margin-top: 14px;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: var(--bg);
}
.scope-wrap canvas { width: 100%; height: 56px; display: block; }

/* device report */
details.device-report { border-radius: var(--r-card); overflow: hidden; }
details.device-report summary {
  cursor: pointer; padding: 11px 16px; font-size: 0.83rem; color: var(--muted);
  list-style: none; display: flex; justify-content: space-between;
}
details.device-report summary::after { content: "+"; color: var(--accent); }
details.device-report[open] summary::after { content: "–"; }
.report-body { padding: 0 16px 12px; font-size: 0.8rem; color: var(--muted); }
.report-body table { width: 100%; border-collapse: collapse; }
.report-body td { padding: 4px 0; border-top: 1px solid var(--line-soft); }
.report-body td:last-child { text-align: right; color: var(--text); }
.report-note { margin: 8px 0 0; color: var(--faint); font-size: 0.74rem; }
.flag-ok { color: var(--accent); }
.flag-warn { color: var(--warn); }

.row-btns { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.kbd-hints { font-size: 0.74rem; color: var(--faint); margin-top: 16px; text-align: center; }
kbd {
  background: var(--panel-solid); border: 1px solid var(--line-soft);
  border-radius: 6px; padding: 1px 6px;
  font-family: var(--body); font-size: 0.72rem; color: var(--muted);
}

/* ---------- content pane ---------- */

.content-pane h1 { font-size: 2.1rem; font-weight: 700; margin: 0 0 10px; }
.content-pane h2 { font-size: 1.45rem; margin: 42px 0 12px; }
.content-pane > p, .content-pane section > p { color: var(--muted); }
.lede { font-size: 1.05rem; color: var(--text); }

.spec-strip { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; padding: 0; list-style: none; }
.spec-strip li {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: var(--r-pill); font-size: 0.78rem; color: var(--muted);
  padding: 6px 13px;
}
.spec-strip b { color: var(--accent); font-weight: 600; }

.feature-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 14px; }
@media (min-width: 640px) { .feature-grid { grid-template-columns: 1fr 1fr; } }
.feature { border-radius: var(--r-card); padding: 16px 16px 14px; }
.feature h3 { font-size: 1rem; margin: 0 0 6px; }
.feature p { font-size: 0.85rem; color: var(--muted); margin: 0; }

ol.steps { counter-reset: s; list-style: none; margin: 14px 0 0; padding: 0; }
ol.steps li {
  counter-increment: s; display: flex; gap: 14px;
  padding: 12px 0; border-top: 1px solid var(--line-soft);
  color: var(--muted); font-size: 0.95rem;
}
ol.steps li::before {
  content: counter(s);
  font-family: var(--display); font-weight: 700; color: var(--accent);
  font-size: 1.15rem; min-width: 22px;
}
ol.steps b { color: var(--text); }

.faq details { border-radius: var(--r-card); margin-top: 10px; }
.faq summary {
  cursor: pointer; padding: 13px 16px; font-weight: 600; font-size: 0.95rem;
  list-style: none; display: flex; justify-content: space-between; gap: 10px;
}
.faq summary::after { content: "+"; color: var(--accent); flex: 0 0 auto; }
.faq details[open] summary::after { content: "–"; }
.faq .a { padding: 0 16px 13px; color: var(--muted); font-size: 0.9rem; }
.faq .a p { margin: 0 0 8px; }

.card-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 14px; }
@media (min-width: 640px) { .card-grid { grid-template-columns: 1fr 1fr; } }
a.card {
  display: block; border-radius: var(--r-card);
  padding: 16px; color: var(--text); text-decoration: none;
}
a.card:hover { border-color: var(--accent); text-decoration: none; }
a.card:hover h3 { color: var(--accent); }
a.card h3 { font-size: 1rem; margin: 3px 0 5px; }
a.card p { font-size: 0.83rem; color: var(--muted); margin: 0; }
a.card .tag {
  font-size: 0.66rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--line-soft);
  margin-top: 52px; padding-top: 18px;
  font-size: 0.8rem; color: var(--faint);
}
.site-footer p { margin: 0 0 6px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ---------- sub-tool + article pages ---------- */

.page-wrap { max-width: 760px; margin: 0 auto; padding: 26px 18px 60px; }
.page-wrap h1 { font-size: 2rem; margin: 0 0 8px; }
.page-meta { color: var(--faint); font-size: 0.8rem; margin-bottom: 20px; }
.blog-wrap h2 { font-size: 1.4rem; margin: 34px 0 10px; }
.blog-wrap p { color: var(--muted); }
.blog-wrap p b { color: var(--text); }
.blog-illo { border-radius: var(--r-card); padding: 14px; margin: 22px 0; }
.blog-illo svg { width: 100%; height: auto; display: block; }
.blog-cta {
  border: 1px solid var(--accent); border-radius: var(--r-card);
  background: rgba(212, 255, 63, 0.07);
  padding: 15px 17px; margin: 28px 0; font-size: 0.94rem;
}

/* pitch pipe & drone grids */
.note-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 12px; }
.note-grid button {
  background: var(--panel); border: 1px solid var(--line-soft);
  border-radius: 16px; color: var(--text);
  font-family: var(--display); font-weight: 600; font-size: 1.15rem;
  padding: 16px 4px; cursor: pointer; box-shadow: var(--shadow);
}
.note-grid button small { display: block; font-family: var(--body); font-size: 0.62rem; color: var(--faint); font-weight: 400; }
.note-grid button.on {
  background: var(--accent); color: var(--accent-ink);
  border-color: var(--accent); box-shadow: 0 0 20px rgba(212, 255, 63, 0.4);
}
.note-grid button.on small { color: var(--accent-ink); }

/* metronome bits */
.bpm-big { text-align: center; padding: 8px 0 0; }
.bpm-big input {
  font-family: var(--display); font-weight: 700; font-size: 4.4rem;
  width: 190px; text-align: center;
  background: transparent; border: none; border-bottom: 2px solid var(--line-soft);
  color: var(--text);
}
.beats { display: flex; justify-content: center; gap: 10px; margin: 16px 0 4px; }
.beat-dot { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line-soft); }
.beat-dot.on { background: var(--accent); border-color: var(--accent); box-shadow: var(--glow); }
.beat-dot.accent-on { background: var(--warn); border-color: var(--warn); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }