/* LangTechDepot — shared look for the Pages site and for the registration
   pages served by server/register.py.

   The two sites are one journey (get a token there, install here), so they
   must not look like two different projects. Keep this file and the <style>
   block in register.py in step: same tokens, same component names.

   Field machines are on slow links, so: no web fonts, no framework, no
   images. Illustrations are inline SVG in the page itself. */

:root {
  --brand:      #1f5fa9;
  --brand-dark: #17497f;
  --brand-soft: #e8f0fa;
  --ink:        #16202b;
  --ink-soft:   #55636f;
  --line:       #d8dee5;
  --paper:      #ffffff;
  --ground:     #f4f6f8;
  --ok:         #1e7a46;
  --warn:       #a05a00;
  --radius:     12px;
  --shadow:     0 1px 2px rgba(22,32,43,.06), 0 8px 24px rgba(22,32,43,.07);
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand:      #6fa8e8;
    --brand-dark: #9cc6f2;
    --brand-soft: #17273a;
    --ink:        #e8edf2;
    --ink-soft:   #a3b1bf;
    --line:       #2c3742;
    --paper:      #131a22;
    --ground:     #0d131a;
    --ok:         #5cc189;
    --warn:       #e0a44a;
    --shadow:     0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem 4rem; }

/* --- masthead: identical on both sites, so the hand-off is invisible ------ */

.masthead {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.masthead .wrap {
  display: flex; align-items: center; gap: .7rem;
  padding-top: 1rem; padding-bottom: 1rem;
}
.masthead a { display: flex; align-items: center; gap: .7rem;
  text-decoration: none; color: inherit; }
.masthead .name { font-weight: 700; font-size: 1.1rem; letter-spacing: -.01em; }
.masthead .mark { flex: none; }

/* --- page head ----------------------------------------------------------- */

h1 { font-size: clamp(1.7rem, 5vw, 2.3rem); line-height: 1.15;
     letter-spacing: -.02em; margin: 2.2rem 0 .5rem; }
h2 { font-size: 1.25rem; margin: 2.5rem 0 .6rem; letter-spacing: -.01em; }
.lede { font-size: 1.12rem; color: var(--ink-soft); margin: 0 0 2rem; }
p { margin: .8rem 0; }
a { color: var(--brand); }

/* --- the four-step rail, shared by both sites ---------------------------- */

.rail {
  display: flex; gap: .4rem; list-style: none;
  margin: 1.6rem 0 0; padding: 0; font-size: .8rem; font-weight: 600;
}
.rail li {
  flex: 1; padding: .45rem .3rem .5rem; text-align: center;
  color: var(--ink-soft); border-top: 4px solid var(--line);
  border-radius: 2px;
}
.rail li.done { color: var(--ok); border-top-color: var(--ok); }
.rail li.now  { color: var(--brand); border-top-color: var(--brand); }
.rail .n { display: block; font-size: .72rem; opacity: .8; font-weight: 700; }

/* --- step cards ---------------------------------------------------------- */

.step {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.5rem; margin: 1.25rem 0;
  display: grid; grid-template-columns: 3.1rem 1fr; gap: 0 1.1rem;
}
/* The number sits alone in the first column; everything else stacks in the
   second. Without pinning the rest, auto-placement drops whatever follows the
   number's row span back into the 3rem column and squeezes it to nothing. */
.step > :not(.num) { grid-column: 2; }
.step > .num {
  grid-column: 1; grid-row: 1;
  width: 3.1rem; height: 3.1rem; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; font-weight: 700;
}
@media (prefers-color-scheme: dark) { .step > .num { color: #0d131a; } }
.step h3 { margin: .35rem 0 .3rem; font-size: 1.3rem; letter-spacing: -.01em; }
.step p  { margin: .4rem 0; }
.step .art { margin: 1rem 0 .2rem; }
.step .art svg { max-width: 100%; height: auto; display: block; }

@media (max-width: 30rem) {
  .step { grid-template-columns: 1fr; }
  .step > .num, .step > :not(.num) { grid-column: 1; }
  .step > .num { margin-bottom: .6rem; }
}

/* --- buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  background: var(--brand); color: #fff; text-decoration: none;
  font: inherit; font-weight: 700; border: 0; cursor: pointer;
  padding: .8rem 1.4rem; border-radius: 9px; margin: .8rem 0 .3rem;
}
.btn:hover { background: var(--brand-dark); }
.btn.big  { font-size: 1.15rem; padding: 1rem 1.7rem; }
.btn.ghost { background: transparent; color: var(--brand);
             box-shadow: inset 0 0 0 2px var(--brand); }
.btn.ghost:hover { background: var(--brand-soft); }
/* Grid items stretch by default, which turns every button into a full-width
   slab. Hug the label instead - except on a phone, where full width is the
   easier target. */
.step > .btn { justify-self: start; }
@media (max-width: 30rem) { .step > .btn { justify-self: stretch; justify-content: center; } }
@media (prefers-color-scheme: dark) {
  .btn { color: #0d131a; } .btn.ghost { color: var(--brand); }
}
.sub-btn { display: block; font-size: .9rem; color: var(--ink-soft); margin: .1rem 0 0; }

/* --- platform chooser ---------------------------------------------------- */

.choose { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); margin: 1.5rem 0; }
.choice {
  display: flex; flex-direction: column; align-items: center; gap: .6rem;
  background: var(--paper); border: 2px solid var(--line); border-radius: var(--radius);
  padding: 2rem 1rem 1.6rem; text-decoration: none; color: inherit;
  box-shadow: var(--shadow);
}
.choice:hover { border-color: var(--brand); }
.choice .label { font-size: 1.3rem; font-weight: 700; }
.choice .hint  { font-size: .92rem; color: var(--ink-soft); text-align: center; }

/* --- copy row: the token on depot, the command here ---------------------- */

.copyrow { display: flex; gap: .5rem; align-items: stretch; margin: .9rem 0; flex-wrap: wrap; }
.copyrow .val {
  flex: 1 1 14rem; min-width: 0;
  font: 600 1.05rem/1.4 ui-monospace, SFMono-Regular, Consolas, monospace;
  background: var(--brand-soft); color: var(--ink);
  border: 1px solid var(--line); border-radius: 9px;
  padding: .8rem .9rem; overflow-wrap: anywhere; user-select: all;
}
.copybtn {
  flex: none; font: inherit; font-weight: 700; cursor: pointer;
  background: var(--brand); color: #fff; border: 0; border-radius: 9px;
  padding: .8rem 1.2rem; min-width: 6.5rem;
}
.copybtn:hover { background: var(--brand-dark); }
.copybtn.done  { background: var(--ok); }
@media (prefers-color-scheme: dark) { .copybtn { color: #0d131a; } }

/* --- notes --------------------------------------------------------------- */

.note {
  background: var(--paper); border: 1px solid var(--line);
  border-left: 4px solid var(--brand); border-radius: 0 9px 9px 0;
  padding: .9rem 1.1rem; margin: 1.4rem 0; font-size: .96rem;
}
.note.warn { border-left-color: var(--warn); }
.note > strong:first-child { display: block; margin-bottom: .2rem; }

code { background: var(--brand-soft); padding: .15rem .4rem; border-radius: 4px;
       font-size: .93em; overflow-wrap: anywhere; }

.foot { margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--line);
        font-size: .92rem; color: var(--ink-soft); }
.foot a { color: var(--ink-soft); }