/* Manual Muscle Test — the site. The app's own palette and type: Instrument
   Serif for names and numbers, IBM Plex Sans (and Plex Arabic) for reading. */

@font-face { font-family: "Instrument Serif"; src: url("fonts/InstrumentSerif-Regular.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Sans"; src: url("fonts/IBMPlexSans-SemiBold.ttf") format("truetype"); font-weight: 600; font-display: swap; }
@font-face { font-family: "IBM Plex Sans Arabic"; src: url("fonts/IBMPlexSansArabic-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Sans Arabic"; src: url("fonts/IBMPlexSansArabic-SemiBold.ttf") format("truetype"); font-weight: 600; font-display: swap; }

:root {
  --canvas: #FBFAF8;
  --surface: #FFFFFF;
  --raised: #F4F1EC;
  --line: #E7E2DA;
  --ink: #16110F;
  --ink-2: #6B645E;
  --ink-3: #9A938C;
  --accent: #0F6E68;
  --accent-soft: rgba(15, 110, 104, 0.10);
  --red: #B01507;
  --stage: #151413;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --arabic: "IBM Plex Sans Arabic", "IBM Plex Sans", system-ui, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0F0E0D;
    --surface: #1A1918;
    --raised: #232120;
    --line: #2C2A28;
    --ink: #F6F3EF;
    --ink-2: #A09A93;
    --ink-3: #6C6560;
    --accent: #35BDB1;
    --accent-soft: rgba(53, 189, 177, 0.12);
    --red: #F2705E;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 400 17px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 20px; }

/* ---- header */
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 0;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand span { font: 400 22px/1 var(--serif); }
.top nav { display: flex; gap: 18px; font-size: 15px; }
.top nav a { color: var(--ink-2); text-decoration: none; }
.top nav a:hover, .top nav a[aria-current] { color: var(--ink); }

/* ---- hero */
.hero {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center;
  padding: 40px 0 56px;
}
.hero .icon { width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 10px 30px rgba(0,0,0,0.12); }
h1 {
  font: 400 clamp(44px, 7vw, 76px)/1.02 var(--serif);
  letter-spacing: -0.01em;
  margin: 22px 0 14px;
}
.lede { font-size: 20px; color: var(--ink-2); max-width: 34em; margin: 0 0 26px; }
.badges { display: flex; flex-wrap: wrap; gap: 10px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  background: var(--ink); color: var(--canvas);
  font-weight: 600; font-size: 15px; text-decoration: none;
}
.badge.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.note { font-size: 13.5px; color: var(--ink-3); margin-top: 12px; }

.phone {
  justify-self: center;
  width: min(330px, 80vw);
  border-radius: 38px; overflow: hidden;
  border: 8px solid #111; background: #111;
  box-shadow: 0 30px 60px rgba(0,0,0,0.18);
}
.phone img { display: block; width: 100%; height: auto; }

/* ---- sections */
section { padding: 56px 0; border-top: 1px solid var(--line); }
.eyebrow {
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 10px;
}
h2 { font: 400 clamp(32px, 4.6vw, 46px)/1.08 var(--serif); margin: 0 0 16px; }
h3 { font-size: 17px; font-weight: 600; margin: 0 0 6px; }
.section-lede { color: var(--ink-2); max-width: 38em; margin: 0 0 30px; font-size: 18px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px;
}
.card p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

.grades { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 30px; }
.grade {
  width: 64px; padding: 8px 0 7px; border-radius: 14px; text-align: center;
  border: 1px solid var(--line); background: var(--surface);
}
.grade b { display: block; font: 400 30px/1 var(--serif); }
.grade small { font-size: 11px; font-weight: 600; color: var(--ink-2); }
/* The app's grade colours: green through amber to red. */
.g5 b { color: var(--accent); } .g4 b { color: #3E9A6B; } .g3 b { color: #B57314; }
.g2 b { color: #C2571A; } .g1 b, .g0 b { color: var(--red); }

.shots {
  display: grid; grid-auto-flow: column; grid-auto-columns: min(250px, 62vw); gap: 16px;
  overflow-x: auto; padding: 4px 2px 18px; scroll-snap-type: x mandatory;
}
.shots img {
  width: 100%; height: auto; border-radius: 22px; border: 1px solid var(--line);
  scroll-snap-align: start; background: var(--stage);
}

.arabic { direction: rtl; font-family: var(--arabic); }
.arabic h2 { font-family: var(--arabic); font-weight: 600; font-size: clamp(28px, 4vw, 38px); line-height: 1.3; }
.arabic .section-lede, .arabic p { line-height: 1.8; }
.arabic .en { direction: ltr; unicode-bidi: isolate; font-family: var(--sans); }

.fine { font-size: 14px; color: var(--ink-2); max-width: 44em; }

/* ---- prose pages (support, privacy) */
.page { padding: 34px 0 60px; max-width: 760px; }
.page h1 { font-size: clamp(40px, 6vw, 60px); margin: 10px 0 12px; }
.page h2 { font-size: 30px; margin: 40px 0 10px; }
.page p, .page li { color: var(--ink); }
.page .muted { color: var(--ink-2); }
details {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 14px 18px; margin: 10px 0;
}
details summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 2px; color: var(--ink-2); }
.contact {
  background: var(--accent-soft); border-radius: 16px; padding: 20px 22px; margin: 18px 0;
}
.contact p { margin: 0; }

/* ---- footer */
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--ink-3); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: space-between; }
footer a { color: var(--ink-2); text-decoration: none; }
footer nav { display: flex; gap: 18px; }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 30px; padding-top: 20px; }
  .grid { grid-template-columns: 1fr; }
  .top nav { gap: 14px; }
}

@media (max-width: 440px) {
  /* All six grades on one line on a phone. */
  .grades { gap: 6px; }
  .grade { width: calc((100% - 30px) / 6); }
  .grade b { font-size: 26px; }
  .grade small { font-size: 9.5px; }
}