/* ============================================================
   SONLANO — design system
   Direction: "spec sheet". Engineering datasheet, flat, hairline
   rules, mono index. No shadows, no cards-carpet, no icons.
   Tokens are the single source of truth: no raw hex below :root.
   ============================================================ */

:root{
  /* colour ------------------------------------------------- */
  --paper:      #E9E9E4;   /* mineral grey, cool — not cream   */
  --paper-2:    #F3F3EF;   /* raised field                     */
  --paper-3:    #DEDED8;   /* recessed field                   */
  --ink:        #15171A;
  --muted:      #55584F;   /* 7.2:1 on --paper                 */
  --rule:       #C7C7BE;
  --rule-soft:  #D8D8D1;
  --accent:     #8F3A1B;   /* oxide. max 2 visible uses/screen */

  /* type --------------------------------------------------- */
  --display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --body:    'Source Serif 4', Georgia, 'Times New Roman', serif;
  --mono:    'Suisse Int\'l', 'Suisse Intl', Helvetica, Arial, sans-serif;

  /* space -------------------------------------------------- */
  --gutter: 32px;
  --max:    1240px;
  --sec-y:  96px;

  /* controls — one height scale ---------------------------- */
  --ctrl-h:      40px;
  --ctrl-h-hero: 48px;

  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; scroll-padding-top:82px; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.65;
  font-synthesis-weight:none;
}

::selection{ background:var(--ink); color:var(--paper); }

a{ color:inherit; }

/* focus is visible everywhere, never removed */
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
}

img,svg{ max-width:100%; }

.wrap{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ---------- typography ------------------------------------ */

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  letter-spacing:-0.025em;
  line-height:1.06;
  margin:0;
}

h1{ font-size:clamp(40px,5.4vw,68px); }
h2{ font-size:clamp(28px,3.4vw,42px); letter-spacing:-0.02em; }
h3{ font-size:20px; letter-spacing:-0.01em; line-height:1.25; }

p{ margin:0 0 1.1em; }
p:last-child{ margin-bottom:0; }

/* the single uppercase role in the system: mono index labels */
.idx{
  font-family:var(--mono);
  font-size:12px;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:0.09em;
  color:var(--muted);
  margin:0;
}
.idx--ink{ color:var(--ink); }

.lede{
  font-size:19px;
  line-height:1.6;
  color:var(--muted);
  max-width:52ch;
}

.hairline{ border:0; border-top:1px solid var(--rule); margin:0; }

/* ---------- controls -------------------------------------- */

.btn{
  display:inline-flex;
  align-items:center;
  height:var(--ctrl-h);
  padding:0 18px;
  font-family:var(--display);
  font-size:15px;
  font-weight:500;
  letter-spacing:-0.005em;
  text-decoration:none;
  border:1px solid var(--ink);
  border-radius:var(--radius);
  background:transparent;
  color:var(--ink);
  cursor:pointer;
  white-space:nowrap;
  transition:background-color .16s ease, color .16s ease, border-color .16s ease;
}
.btn--solid{
  background:var(--accent);
  border-color:var(--accent);
  color:var(--paper-2);
}
.btn--solid:hover{ background:var(--ink); border-color:var(--ink); }
.btn--quiet:hover{ background:var(--paper-3); }
.btn--hero{ height:var(--ctrl-h-hero); padding:0 24px; font-size:16px; }

/* ---------- header ---------------------------------------- */

.top{
  position:sticky;
  top:0;
  z-index:20;
  background:var(--paper);
  border-bottom:1px solid var(--rule);
}
.top__in{
  display:flex;
  align-items:center;
  gap:28px;
  height:66px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  text-decoration:none;
  margin-right:auto;
}
.brand__logo{ display:block; height:24px; width:auto; }
.nav{ display:flex; gap:24px; align-items:center; }
.nav a{
  font-family:var(--display);
  font-size:14.5px;
  font-weight:450;
  text-decoration:none;
  color:var(--muted);
  transition:color .16s ease;
}
.nav a:hover{ color:var(--ink); }

/* ---------- sections -------------------------------------- */

.sec{ padding-block:var(--sec-y); border-top:1px solid var(--rule); }
.sec--flush{ border-top:0; }
.sec--tight{ padding-block:72px; }

.sec__head{
  display:flex;
  flex-direction:column;
  gap:14px;
  margin-bottom:52px;
}
.sec__head p.lede{ margin-top:14px; }

/* ---------- hero ------------------------------------------ */

.hero{ padding-top:88px; padding-bottom:88px; }
.hero__grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:64px;
  align-items:start;
}
.hero h1{ margin:22px 0 26px; }
.hero__cta{
  display:flex;
  align-items:center;
  gap:20px;
  margin-top:34px;
  flex-wrap:wrap;
}

/* signature element: portrait image */
/* picture is a transparent wrapper so the grid item is still the img —
   keeps the min-width:0 fix below effective (grid items default to
   min-width:auto, which un-shrinks against the img's intrinsic size) */
.hero__grid picture{ display:block; min-width:0; }
.hero__pic{
  display:block;
  width:100%;
  min-width:0;
  height:100%;
  object-fit:cover;
  border-radius:var(--radius);
}

/* ---------- practice table -------------------------------- */

.table{ border-top:1px solid var(--rule); }
.row{
  display:grid;
  grid-template-columns:180px minmax(0,1fr) 190px;
  gap:32px;
  padding:26px 0 26px 0;
  border-bottom:1px solid var(--rule);
  position:relative;
  transition:background-color .16s ease;
}
.row:hover{ background:var(--paper-2); }
.row__title{ padding-left:0; transition:padding-left .16s ease; }
.row:hover .row__title{ padding-left:10px; }
.row__title::before{
  content:"";
  position:absolute;
  left:0;
  top:30px;
  width:0;
  height:2px;
  background:var(--accent);
  transition:width .16s ease;
}
.row:hover .row__title::before{ width:6px; }
.row p{ color:var(--muted); max-width:56ch; }
.row__meta{
  font-family:var(--mono);
  font-size:12px;
  line-height:1.9;
  color:var(--muted);
}

/* ---------- process --------------------------------------- */

.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--rule);
  border:1px solid var(--rule);
}
.step{
  background:var(--paper);
  padding:26px 24px 30px;
  min-height:230px;          /* fixed slot: rows stay on one baseline */
  display:flex;
  flex-direction:column;
}
.step__no{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:0.09em;
  color:var(--accent);
  margin-bottom:auto;
}
.step h3{ margin-bottom:10px; }
.step p{ font-size:15.5px; color:var(--muted); }

/* ---------- stack ----------------------------------------- */

.stack{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:32px;
}
.stack__col h3{
  font-size:15px;
  font-family:var(--mono);
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:0.09em;
  padding-bottom:12px;
  border-bottom:1px solid var(--rule);
  margin-bottom:14px;
}
.stack__col ul{ margin:0; padding:0; list-style:none; }
.stack__col li{
  font-size:16px;
  line-height:1.9;
  color:var(--muted);
}

/* ---------- commitments ----------------------------------- */

.commit{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  column-gap:64px;
}
.commit__item{
  padding:28px 0;
  border-top:1px solid var(--rule);
}
.commit__item h3{ margin-bottom:10px; }
.commit__item p{ color:var(--muted); font-size:16px; max-width:48ch; }

/* ---------- contact --------------------------------------- */

.contact{ max-width:60ch; }
.contact h2{ margin-bottom:20px; }

/* ---------- footer ---------------------------------------- */

.foot{
  border-top:1px solid var(--ink);
  padding-block:44px 36px;
  margin-top:8px;
}
.foot__grid{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:32px;
  padding-bottom:36px;
}
.foot__grid ul{ margin:12px 0 0; padding:0; list-style:none; }
.foot__grid li{ line-height:2; }
.foot__grid a{
  font-family:var(--display);
  font-size:14.5px;
  color:var(--muted);
  text-decoration:none;
}
.foot__grid a:hover{ color:var(--ink); }
.foot__note{
  display:flex;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  padding-top:22px;
  border-top:1px solid var(--rule);
}

/* ---------- legal pages ----------------------------------- */

.legal{ padding-block:72px 96px; }
.legal__grid{
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  gap:64px;
  align-items:start;
}
.legal__toc{ position:sticky; top:96px; }
.legal__toc ul{ margin:14px 0 0; padding:0; list-style:none; }
.legal__toc li{ line-height:1.9; }
.legal__toc a{
  font-size:15px;
  color:var(--muted);
  text-decoration:none;
}
.legal__toc a:hover{ color:var(--ink); }
.legal__body{ max-width:70ch; }
.legal__body h2{ font-size:24px; margin:44px 0 14px; }
.legal__body h2:first-of-type{ margin-top:28px; }
.legal__body p,.legal__body li{ color:var(--muted); font-size:16.5px; }
.legal__body ul{ padding-left:20px; margin:0 0 1.1em; }
.legal__body li{ margin-bottom:6px; }
.legal__body strong{ color:var(--ink); font-weight:600; }

/* ---------- motion ---------------------------------------- */
/* One micro-interaction only: the practice row marker on hover.
   No scroll-triggered reveals — content is never hidden by script. */

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

/* ---------- responsive ------------------------------------ */

@media (max-width:1080px){
  .stack{ grid-template-columns:repeat(2,minmax(0,1fr)); row-gap:36px; }
  .steps{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .row{ grid-template-columns:160px minmax(0,1fr); }
  .row__meta{ grid-column:2; }
}

@media (max-width:860px){
  :root{ --gutter:20px; --sec-y:64px; }
  .nav{ display:none; }
  .hero__grid,.legal__grid{ grid-template-columns:minmax(0,1fr); gap:40px; }
  .sec__head{ gap:12px; margin-bottom:36px; }
  .commit{ grid-template-columns:minmax(0,1fr); }
  .foot__grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .legal__toc{ position:static; }
  .row{ grid-template-columns:minmax(0,1fr); gap:10px; }
  .row__meta{ grid-column:1; }
  body{ font-size:16.5px; }
}

@media (max-width:640px){
  .top__in .btn{ display:none; }
}

@media (max-width:520px){
  .steps{ grid-template-columns:minmax(0,1fr); }
  .step{ min-height:0; }
  .foot__grid{ grid-template-columns:minmax(0,1fr); gap:24px; }
}