/* ============================================================
   MobilitiLab — shared styles
   Design direction: "the instrument panel"
   The site inherits Flow's own visual DNA: dark ink header,
   light canvas, a single restrained green accent, data-dense
   labels and hairline rules. Restraint is the brand.
   ============================================================ */

:root {
  /* palette — drawn from Flow's own UI */
  --ink:        #14181c;   /* topbar near-black */
  --ink-soft:   #2a3138;
  --canvas:     #f4f6f8;   /* app canvas */
  --paper:      #ffffff;
  --slate:      #5b6672;   /* secondary text */
  --slate-dim:  #8b96a2;
  --line:       #e2e7ec;   /* hairline */
  --line-soft:  #eef1f4;
  --green:      #2e7d5b;   /* Flow accent */
  --green-deep: #215d43;
  --green-wash: #eaf3ee;
  --signal:     #c2412d;   /* incident red, used rarely */

  /* type */
  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body:    "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* scale */
  --wrap: 1180px;
  --gut: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--canvas);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto; }
}

/* ---------- type ---------- */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0 0 1.1em; }
a { color: var(--green-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--green);
  display: inline-block;
}

.lede {
  font-size: clamp(19px, 2.1vw, 22px);
  color: var(--slate);
  line-height: 1.5;
  max-width: 42ch;
}

/* ---------- layout ---------- */
.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gut);
  padding-right: var(--gut);
}
.section { padding: clamp(64px, 9vw, 120px) 0; }
.section--tight { padding: clamp(44px, 6vw, 76px) 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--ink);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: #fff;
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--green); }
.brand .sub {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate-dim);
  font-weight: 400;
}
.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  color: #cdd4db;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.nav a:hover, .nav a.active { color: #fff; text-decoration: none; }
.nav a.active { color: var(--green); }
.nav .btn-sm {
  border: 1px solid rgba(255,255,255,0.22);
  padding: 7px 16px;
  border-radius: 6px;
  color: #fff;
}
.nav .btn-sm:hover { background: var(--green); border-color: var(--green); }

.nav-toggle { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--body);
  font-weight: 500;
  font-size: 16px;
  padding: 13px 26px;
  border-radius: 7px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; }
.btn--primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 1px 2px rgba(20,24,28,0.12);
}
.btn--primary:hover { background: var(--green-deep); transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--slate-dim); background: var(--paper); }
.btn .arrow { transition: transform .15s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- hero ---------- */
.hero { background: var(--canvas); padding-top: clamp(56px, 7vw, 92px); }
.hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}
.hero h1 {
  font-size: clamp(38px, 6vw, 66px);
  max-width: 15ch;
  margin-bottom: 22px;
}
.hero .lede { max-width: 52ch; margin-bottom: 30px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero__note {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--slate-dim);
  letter-spacing: 0.02em;
  margin-top: 26px;
}

/* device-framed screenshot */
.shot {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--ink);
  box-shadow: 0 24px 60px -28px rgba(20,24,28,0.42),
              0 4px 14px -6px rgba(20,24,28,0.16);
}
.shot__bar {
  height: 34px;
  background: var(--ink);
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.shot__bar span {
  width: 10px; height: 10px; border-radius: 50%;
  background: #3a434c;
}
.shot__bar .label {
  margin-left: 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--slate-dim);
  letter-spacing: 0.06em;
  width: auto; height: auto; border-radius: 0; background: none;
}
.shot img { display: block; width: 100%; height: auto; }

.hero .shot { margin-top: 8px; }

/* ---------- stat strip ---------- */
.strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 32px var(--gut);
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: none; }
.stat .n {
  font-family: var(--display);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1;
}
.stat .k {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  margin-top: 10px;
}
.strip__grid > .stat:first-child { padding-left: var(--gut); }

/* ---------- editions / feature rows ---------- */
.rowhead { max-width: 58ch; margin-bottom: clamp(40px, 5vw, 64px); }
.rowhead h2 { font-size: clamp(30px, 4vw, 44px); margin-bottom: 20px; }
.rowhead p { color: var(--slate); font-size: 19px; }

.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  padding: clamp(40px, 6vw, 78px) 0;
  border-top: 1px solid var(--line);
}
.feature:last-child { border-bottom: 1px solid var(--line); }
.feature--flip .feature__text { order: 2; }
.feature__text h3 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 16px; }
.feature__text p { color: var(--slate); }
.feature__tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 14px;
  display: block;
}
.feature__list { list-style: none; padding: 0; margin: 18px 0 0; }
.feature__list li {
  padding: 9px 0 9px 24px;
  border-top: 1px solid var(--line-soft);
  position: relative;
  color: var(--ink-soft);
  font-size: 15.5px;
}
.feature__list li::before {
  content: "";
  position: absolute; left: 2px; top: 17px;
  width: 7px; height: 7px; border-radius: 2px;
  background: var(--green);
}

/* ---------- editions cards ---------- */
.editions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.edition {
  background: var(--paper);
  padding: 34px 30px;
}
.edition__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate-dim);
  letter-spacing: 0.08em;
}
.edition h3 {
  font-size: 23px;
  margin: 8px 0 12px;
}
.edition h3 .lab { color: var(--green); }
.edition p { color: var(--slate); font-size: 15.5px; margin: 0; }

/* ---------- callout / band ---------- */
.band {
  background: var(--ink);
  color: #fff;
}
.band h2 { color: #fff; font-size: clamp(28px, 3.6vw, 42px); max-width: 20ch; }
.band .lede { color: #aab4be; max-width: 54ch; margin-top: 18px; }
.band__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.band .quiet {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--slate-dim);
  letter-spacing: 0.03em;
  border-left: 2px solid var(--green);
  padding-left: 16px;
  line-height: 1.7;
}

/* ---------- principles (About + home) ---------- */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.principle { background: var(--paper); padding: 30px 30px; }
.principle .k { font-family: var(--mono); font-size: 12px; color: var(--green); letter-spacing: 0.06em; margin-bottom: 12px; }
.principle h4 { font-size: 19px; margin-bottom: 10px; }
.principle p { color: var(--slate); font-size: 15px; margin: 0; }

/* ---------- CTA foot ---------- */
.cta-foot { text-align: center; }
.cta-foot h2 { font-size: clamp(30px, 4.4vw, 50px); max-width: 18ch; margin: 0 auto 22px; }
.cta-foot .lede { margin: 0 auto 32px; max-width: 46ch; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink);
  color: #9aa4ae;
  padding: 54px 0 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 30px;
  flex-wrap: wrap;
}
.site-footer .brand { font-size: 18px; margin-bottom: 12px; }
.foot-col p { font-size: 14px; margin: 0; line-height: 1.7; }
.foot-links { display: flex; gap: 26px; flex-wrap: wrap; }
.foot-links a { color: #cdd4db; font-size: 14.5px; }
.foot-links a:hover { color: #fff; text-decoration: none; }
.foot-meta {
  width: 100%;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 34px; padding-top: 22px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; color: var(--slate-dim); letter-spacing: 0.02em;
}

/* ---------- interior page header ---------- */
.pagehead { background: var(--paper); border-bottom: 1px solid var(--line); padding: clamp(56px, 8vw, 92px) 0 clamp(40px, 5vw, 56px); }
.pagehead h1 { font-size: clamp(34px, 5vw, 56px); max-width: 16ch; margin-bottom: 20px; }
.pagehead .lede { max-width: 56ch; }

/* ---------- about ---------- */
.bio { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.bio__card { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 30px; }
.bio__card .name { font-family: var(--display); font-weight: 600; font-size: 22px; letter-spacing: -0.02em; }
.bio__card .role { font-family: var(--mono); font-size: 12.5px; color: var(--green); letter-spacing: 0.05em; text-transform: uppercase; margin-top: 6px; }
.bio__card .cred { list-style: none; padding: 0; margin: 22px 0 0; }
.bio__card .cred li { padding: 11px 0; border-top: 1px solid var(--line-soft); font-size: 14.5px; color: var(--ink-soft); }
.bio__card .cred li span { display: block; font-family: var(--mono); font-size: 11px; color: var(--slate-dim); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 3px; }
.bio__body p { color: var(--slate); font-size: 18px; }
.bio__body p strong { color: var(--ink); font-weight: 600; }

/* ---------- contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.contact__panel { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 36px; }
.contact__panel h3 { font-size: 22px; margin-bottom: 14px; }
.contact__panel p { color: var(--slate); font-size: 16px; }
.contact__row { display: flex; align-items: baseline; gap: 12px; padding: 14px 0; border-top: 1px solid var(--line-soft); }
.contact__row .k { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--slate-dim); width: 84px; flex: none; }
.contact__row .v { color: var(--ink); font-size: 16px; }
.contact__cta { margin-top: 26px; }

/* ---------- product intro list ---------- */
.capabilities { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin-top: 8px; }
.cap { background: var(--paper); padding: 26px 24px; }
.cap .k { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--green); margin-bottom: 10px; }
.cap h4 { font-size: 17px; margin-bottom: 8px; }
.cap p { font-size: 14px; color: var(--slate); margin: 0; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero__grid, .feature, .band__grid, .bio, .contact { grid-template-columns: 1fr; }
  .feature--flip .feature__text { order: 0; }
  .strip__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2) { border-right: none; }
  .editions, .capabilities, .principles { grid-template-columns: 1fr; }
  .nav { gap: 18px; }
  .nav a:not(.btn-sm) { display: none; }
}
@media (max-width: 560px) {
  .strip__grid { grid-template-columns: 1fr; }
  .stat { border-right: none; }
  body { font-size: 16px; }
}

/* ---------- contact form ---------- */
.cform {
  max-width: 560px;
  margin: 34px auto 0;
  text-align: left;
  display: grid;
  gap: 16px;
}
.cform .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.cform label {
  display: block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #aab4be;
  margin-bottom: 8px;
}
.cform input,
.cform textarea {
  width: 100%;
  font-family: var(--body);
  font-size: 15.5px;
  color: #fff;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 7px;
  padding: 12px 14px;
  transition: border-color .15s ease, background .15s ease;
}
.cform input::placeholder,
.cform textarea::placeholder { color: #6c7883; }
.cform input:focus,
.cform textarea:focus {
  outline: none;
  border-color: var(--green);
  background: rgba(255,255,255,0.08);
}
.cform textarea { resize: vertical; min-height: 96px; }
.cform .btn { width: 100%; justify-content: center; margin-top: 4px; }
.cform__note {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate-dim);
  text-align: center;
  margin: 18px 0 0;
}
@media (max-width: 520px) {
  .cform .row2 { grid-template-columns: 1fr; }
}