/* =============================================================
   LAKESIDE AI — lakesideai.dev  (Paper / "Drawing Sheet" surface)
   Static port of the design-system marketing language: warm paper,
   26px drafting grid, title-block hero, dimension rules, ink rules.
   Tokens come from ds/tokens.css; fonts from fonts/fonts.css.
   ============================================================= */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth}

/* Paper surface: remap semantic tokens to the warm palette + draw the
   faint graph-paper grid. (.surface-paper remap lives in tokens/colors.css) */
body{
  font-family:var(--font-sans);
  font-size:var(--fs-base);
  line-height:var(--lh-relaxed);
  color:var(--paper-ink);
  background-color:var(--paper-0);
  background-image:
    linear-gradient(var(--paper-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--paper-line) 1px,transparent 1px);
  background-size:var(--grid-unit) var(--grid-unit);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}

a{color:var(--blue-700);text-decoration:none}
a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
:focus{outline:none}
:focus-visible{outline:2px solid var(--blue-400);outline-offset:3px;border-radius:2px}

.container{max-width:var(--container-site);margin:0 auto;padding:0 40px;position:relative}

/* ---- SKIP LINK ---- */
.skip-link{
  position:absolute;top:-46px;left:8px;z-index:1000;
  background:var(--green-700);color:#fff;
  padding:10px 16px;font-family:var(--font-mono);font-size:var(--fs-xs);
  border-radius:var(--radius-sm);text-decoration:none;
}
.skip-link:focus{top:8px;text-decoration:none}

/* ---- VISUALLY HIDDEN ---- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---- BRAND MARK (▸ + wordmark) ---- */
.brandmark{display:inline-flex;align-items:center;gap:.55em;color:var(--paper-ink);text-decoration:none;font-size:13px}
.brandmark:hover{text-decoration:none}
.brandmark .tri{
  width:0;height:0;flex:none;
  border-left:1em solid var(--green-700);
  border-top:.62em solid transparent;border-bottom:.62em solid transparent;
}
.brandmark .wm{font-family:var(--font-mono);font-weight:var(--fw-semibold);letter-spacing:.13em;line-height:1;white-space:nowrap}

/* ---- NAV ---- */
nav.site{
  position:sticky;top:0;z-index:100;
  background:rgba(250,248,241,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--paper-line-2);
}
nav.site .container{display:flex;align-items:center;justify-content:space-between;padding-top:13px;padding-bottom:13px}
nav.site .links{display:flex;gap:26px;font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.04em}
nav.site .links a{color:var(--paper-ink-2)}
nav.site .links a:hover{color:var(--paper-ink);text-decoration:none}

/* ---- KICKER / EYEBROW ---- */
.kicker{
  font-family:var(--font-mono);font-size:var(--fs-2xs);font-weight:var(--fw-medium);
  letter-spacing:var(--ls-kicker);text-transform:uppercase;color:var(--green-700);
  display:block;margin-bottom:16px;
}
.kicker.blue{color:var(--blue-700);display:flex;align-items:center;gap:12px;letter-spacing:var(--ls-wide)}
.kicker.blue::before{content:'';width:34px;height:1px;background:var(--blue-700)}

/* ---- HERO ---- */
.hero{border-bottom:1px solid var(--paper-line-2)}
.hero .container{padding-top:84px;padding-bottom:0}
.hero h1{
  font-family:var(--font-sans);font-size:clamp(38px,5.4vw,62px);font-weight:var(--fw-medium);
  line-height:var(--lh-tight);letter-spacing:var(--ls-display);color:var(--paper-ink);
  margin-bottom:24px;max-width:880px;text-wrap:balance;
}
.hero h1 .accent{color:var(--green-700)}
.hero .subhead{font-family:var(--font-mono);font-size:var(--fs-md);color:var(--blue-700);margin-bottom:22px;letter-spacing:-.005em}
.hero .lead{font-family:var(--font-sans);font-size:var(--fs-md);line-height:var(--lh-relaxed);color:var(--paper-ink-2);max-width:660px;margin-bottom:32px}

/* ---- CTA BUTTONS ---- */
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-sans);font-weight:var(--fw-medium);font-size:var(--fs-sm);
  line-height:1;letter-spacing:var(--ls-tight);height:var(--control-h-md);padding:0 18px;
  border:var(--bw-rule) solid transparent;border-radius:var(--radius-sm);
  background:transparent;color:var(--paper-ink);cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:background var(--dur-fast) var(--ease-standard),border-color var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard),transform var(--dur-fast) var(--ease-standard);
}
.btn:hover{text-decoration:none}
.btn:active{transform:var(--press-shift)}
.btn.primary{background:var(--green-700);border-color:var(--green-700);color:#fff}
.btn.primary:hover{background:var(--green-800);border-color:var(--green-800)}
.btn.secondary{border-color:var(--paper-line-2);color:var(--paper-ink)}
.btn.secondary:hover{background:var(--paper-1);border-color:var(--paper-ink)}
.btn.ghost{color:var(--paper-ink-2);padding:0 10px}
.btn.ghost:hover{background:var(--paper-1);color:var(--paper-ink)}

/* ---- DIMENSION RULE ---- */
.dim-rule{display:flex;align-items:center;color:var(--blue-700);font-family:var(--font-mono);font-size:var(--fs-3xs);letter-spacing:.1em}
.dim-rule .tick{width:1px;height:10px;background:currentColor;flex:none}
.dim-rule .span{flex:1;height:1px;background:currentColor}
.dim-rule .lbl{padding:0 12px;color:var(--paper-ink-2);white-space:nowrap;text-transform:uppercase}

/* ---- TITLE BLOCK ---- */
.title-block{display:grid;border:var(--bw-rule) solid var(--paper-ink);font-family:var(--font-mono)}
.title-block .cell{padding:10px 14px;border-right:1px solid var(--paper-line-2);min-width:0}
.title-block .cell:last-child{border-right:none}
.title-block .k{font-size:var(--fs-3xs);letter-spacing:var(--ls-wide);text-transform:uppercase;color:var(--paper-ink-3);margin-bottom:5px;white-space:nowrap}
.title-block .v{font-size:var(--fs-sm);color:var(--paper-ink);font-weight:var(--fw-medium);display:flex;align-items:center;gap:7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.title-block .v.ok{color:var(--green-700)}
.title-block .v .tri{width:0;height:0;flex:none;border-left:.85em solid var(--green-700);border-top:.52em solid transparent;border-bottom:.52em solid transparent}

/* ---- SECTIONS ---- */
section{border-bottom:1px solid var(--paper-line-2)}
section .container{padding-top:72px;padding-bottom:72px}
section.band{background:var(--paper-1)}
.section-head{margin-bottom:40px}
.section-head h2{font-family:var(--font-sans);font-size:var(--fs-2xl);font-weight:var(--fw-medium);letter-spacing:var(--ls-heading);color:var(--paper-ink);margin-bottom:10px;text-wrap:balance}
.section-head .sub{font-family:var(--font-sans);font-size:var(--fs-md);line-height:var(--lh-relaxed);color:var(--paper-ink-2);max-width:680px}

/* ---- FIGURE / VIDEO PANEL ---- */
.figure{border:var(--bw-rule) solid var(--paper-ink);background:var(--paper-0)}
.figure-head{display:flex;align-items:center;gap:10px;padding:9px 14px;border-bottom:1px solid var(--paper-line-2);font-family:var(--font-mono);font-size:var(--fs-2xs);color:var(--paper-ink-3);letter-spacing:.04em}
.figure-head .path{margin-left:auto;color:var(--paper-ink-2)}
.video-frame{position:relative;width:100%;aspect-ratio:16/9;background:var(--paper-2);overflow:hidden}
.video-el{position:absolute;inset:0;width:100%;height:100%;display:none;background:#000}
.video-el.loaded{display:block}
.video-el.loaded ~ .video-placeholder{display:none}
.video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--paper-ink-3);letter-spacing:.04em;text-align:center;padding:24px;gap:10px}
.video-placeholder .accent{color:var(--green-700)}
.figure-cap{font-family:var(--font-mono);font-size:var(--fs-xs);color:var(--paper-ink-3);margin-top:14px;letter-spacing:.02em}

/* ---- BORDERED CELL GRID (problem / who) ---- */
.cell-grid{display:grid;border:var(--bw-rule) solid var(--paper-ink)}
.cell-grid.cols-3{grid-template-columns:repeat(3,1fr)}
.cell-grid.cols-2{grid-template-columns:repeat(2,1fr)}
.cell-grid .cell{padding:26px 28px}
.cell-grid.cols-3 .cell{border-right:1px solid var(--paper-line-2)}
.cell-grid.cols-3 .cell:nth-child(3n){border-right:none}
.cell-grid.cols-2 .cell:nth-child(odd){border-right:1px solid var(--paper-line-2)}
.cell-grid .cell h3{font-family:var(--font-mono);font-size:var(--fs-sm);font-weight:var(--fw-medium);color:var(--paper-ink);margin-bottom:14px;letter-spacing:.02em}
.cell-grid .cell h3::before{content:'> ';color:var(--green-700)}
.cell-grid .cell p{font-family:var(--font-sans);font-size:var(--fs-base);line-height:var(--lh-relaxed);color:var(--paper-ink-2)}
.close-line{font-family:var(--font-sans);font-size:var(--fs-md);line-height:var(--lh-relaxed);color:var(--paper-ink-2);max-width:780px;margin-top:28px}

/* ---- HOW STEPS ---- */
.steps{margin-top:4px}
.step{display:grid;grid-template-columns:90px 1fr;gap:28px;padding:26px 0;border-bottom:1px solid var(--paper-line-2);align-items:start}
.step:last-child{border-bottom:none}
.step .num{font-family:var(--font-mono);font-size:26px;color:var(--green-700);font-weight:var(--fw-medium);letter-spacing:.02em;line-height:1.1}
.step h3{font-family:var(--font-sans);font-size:var(--fs-lg);font-weight:var(--fw-semibold);letter-spacing:var(--ls-tight);color:var(--paper-ink);margin-bottom:8px}
.step p{font-family:var(--font-sans);font-size:var(--fs-base);line-height:var(--lh-relaxed);color:var(--paper-ink-2);max-width:720px}

/* ---- HANGAR LIST ---- */
.spec-overview{font-family:var(--font-sans);font-size:var(--fs-md);color:var(--paper-ink-2);max-width:780px;line-height:var(--lh-relaxed);margin-bottom:32px}
.spec-list{border:var(--bw-rule) solid var(--paper-ink);margin-bottom:34px}
.spec-list .row{display:grid;grid-template-columns:160px 1fr;gap:24px;padding:15px 24px;border-bottom:1px solid var(--paper-line-2);align-items:baseline}
.spec-list .row:last-child{border-bottom:none}
.spec-list .row .id{font-family:var(--font-mono);font-size:var(--fs-base);font-weight:var(--fw-medium);color:var(--paper-ink);white-space:nowrap}
.spec-list .row .id .slash{color:var(--green-700)}
.spec-list .row .desc{font-family:var(--font-sans);font-size:var(--fs-base);color:var(--paper-ink-2);line-height:1.6}

/* ---- CONTACT ---- */
.contact-body{font-family:var(--font-sans);font-size:var(--fs-md);color:var(--paper-ink-2);max-width:780px;line-height:var(--lh-relaxed);margin-bottom:30px}

/* ---- FOOTER ---- */
footer{border-bottom:none}
footer .container{padding:40px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px}
footer .meta{font-family:var(--font-mono);font-size:var(--fs-2xs);color:var(--paper-ink-3);letter-spacing:.04em}
footer .meta a{color:var(--paper-ink-2)}
footer .meta a:hover{color:var(--green-700)}
footer .sep{color:var(--green-700);margin:0 8px}
footer .legal{font-family:var(--font-mono);font-size:var(--fs-2xs);color:var(--paper-ink-3);letter-spacing:.04em}
footer .legal a{color:var(--paper-ink-2)}
footer .legal a:hover{color:var(--green-700)}

/* ---- RESPONSIVE ---- */
@media(max-width:860px){
  .hero h1{font-size:34px}
  .cell-grid.cols-3,.cell-grid.cols-2{grid-template-columns:1fr}
  .cell-grid.cols-3 .cell,.cell-grid.cols-2 .cell{border-right:none;border-bottom:1px solid var(--paper-line-2)}
  .cell-grid .cell:last-child{border-bottom:none}
  .step{grid-template-columns:60px 1fr;gap:16px}
  .spec-list .row{grid-template-columns:120px 1fr;gap:16px}
  .title-block{grid-template-columns:1fr 1fr !important}
  .title-block .cell{border-bottom:1px solid var(--paper-line-2)}
  nav.site .links{gap:14px}
}
@media(max-width:540px){
  .container{padding:0 20px}
  section .container{padding-top:56px;padding-bottom:56px}
  .hero .container{padding-top:60px}
  nav.site .links a:nth-child(n+5){display:none}
  .spec-list .row{grid-template-columns:1fr;gap:4px}
  .title-block{grid-template-columns:1fr !important}
  footer .container{flex-direction:column;align-items:flex-start;text-align:left}
}