/* ==========================================================================
   EPCI ADVISORY — DESIGN SYSTEM
   Tokens: color, type, spacing, grid. Component styles live in components.css.
   Brand-identity strings (name, email, logo) are NOT set here — see content
   in index.html — this file only carries visual tokens, so a future rename
   never touches this system.
   ========================================================================== */

:root{
  /* ---- color: light (default) ---- */
  --bg:            #F5F2E9;
  --bg-raised:     #ECE7D8;
  --bg-inset:      #EFEAD9;
  --ink:           #101A1D;
  --ink-soft:      #4C5A57;
  --ink-faint:     #7C8985;
  --navy:          #0E2A3D;
  --navy-soft:     #33566B;
  --green:         #3D6C55;
  --green-soft:    #DCE5DB;
  --line:          #D8D1BC;
  --line-strong:   #B9B097;
  --surface-dark:  #0E1B20;
  --on-dark:       #EDE8DA;
  --focus:         #2F6E92;
  --flag:          #8C3B2E;
  --flag-soft:     #F1DFD9;

  /* ---- type ---- */
  --font-display: -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono:    ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;

  --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1rem, 0.95rem + 0.2vw, 1.1rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.4vw, 1.4rem);
  --step-2:  clamp(1.5rem, 1.3rem + 0.8vw, 1.9rem);
  --step-3:  clamp(1.9rem, 1.6rem + 1.4vw, 2.6rem);
  --step-4:  clamp(2.4rem, 1.9rem + 2.2vw, 3.6rem);
  --step-5:  clamp(3rem, 2.2rem + 3.6vw, 5.4rem);

  /* ---- spacing (8px base) ---- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --sp-10: 144px;

  /* ---- grid ---- */
  --container: 1320px;
  --container-narrow: 780px;
  --gutter: 32px;
  --edge: 24px;

  /* ---- misc ---- */
  --radius: 2px;
  --border-w: 1px;
  --ease: cubic-bezier(.2,.7,.2,1);
  --dur-fast: 140ms;
  --dur: 320ms;
  --dur-slow: 640ms;
}

@media (max-width: 720px){
  :root{ --edge: 20px; }
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:            #0A1215;
    --bg-raised:     #101A1D;
    --bg-inset:      #0D1619;
    --ink:           #ECE7D9;
    --ink-soft:      #A8B3AE;
    --ink-faint:     #71807B;
    --navy:          #8FB4C9;
    --navy-soft:     #6C93A8;
    --green:         #78AC90;
    --green-soft:    #15221C;
    --line:          #223032;
    --line-strong:   #33443F;
    --surface-dark:  #060B0D;
    --on-dark:       #ECE7D9;
    --focus:         #7FC0E0;
    --flag:          #D98D7C;
    --flag-soft:     #2A1B18;
  }
}
:root[data-theme="dark"]{
  --bg:#0A1215; --bg-raised:#101A1D; --bg-inset:#0D1619; --ink:#ECE7D9; --ink-soft:#A8B3AE;
  --ink-faint:#71807B; --navy:#8FB4C9; --navy-soft:#6C93A8; --green:#78AC90; --green-soft:#15221C;
  --line:#223032; --line-strong:#33443F; --surface-dark:#060B0D; --on-dark:#ECE7D9; --focus:#7FC0E0;
  --flag:#D98D7C; --flag-soft:#2A1B18;
}
:root[data-theme="light"]{
  --bg:#F5F2E9; --bg-raised:#ECE7D8; --bg-inset:#EFEAD9; --ink:#101A1D; --ink-soft:#4C5A57;
  --ink-faint:#7C8985; --navy:#0E2A3D; --navy-soft:#33566B; --green:#3D6C55; --green-soft:#DCE5DB;
  --line:#D8D1BC; --line-strong:#B9B097; --surface-dark:#0E1B20; --on-dark:#EDE8DA; --focus:#2F6E92;
  --flag:#8C3B2E; --flag-soft:#F1DFD9;
}

/* ---- reset ---- */
*, *::before, *::after{ box-sizing: border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{ animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important; }
}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:var(--font-body); font-size:var(--step-0); line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img, svg{ max-width:100%; display:block; }
a{ color:inherit; }
button{ font:inherit; }
:focus-visible{ outline:2px solid var(--focus); outline-offset:3px; }

/* ---- type scale ---- */
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:800; letter-spacing:-0.01em; margin:0; text-wrap:balance; }
h1{ font-size:var(--step-5); line-height:0.98; }
h2{ font-size:var(--step-3); line-height:1.06; }
h3{ font-size:var(--step-2); line-height:1.15; }
h4{ font-size:var(--step-1); line-height:1.2; }
p{ margin:0 0 var(--sp-4); max-width:64ch; }
.lede{ font-size:var(--step-1); color:var(--ink-soft); max-width:52ch; }

.eyebrow{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:0.12em;
  text-transform:uppercase; color:var(--green); display:inline-flex; align-items:center; gap:8px;
}
.eyebrow::before{ content:""; width:14px; height:1px; background:currentColor; }

/* ---- layout ---- */
.container{ max-width:var(--container); margin:0 auto; padding:0 var(--edge); }
.container-narrow{ max-width:var(--container-narrow); margin:0 auto; padding:0 var(--edge); }
.grid-12{ display:grid; grid-template-columns:repeat(12,1fr); gap:var(--gutter); }
@media (max-width:900px){ .grid-12{ grid-template-columns:repeat(6,1fr); gap:20px; } }
@media (max-width:560px){ .grid-12{ grid-template-columns:repeat(4,1fr); gap:16px; } }

.split{ display:grid; grid-template-columns:5fr 7fr; gap:var(--gutter); align-items:start; }
.split.split-narrow-label{ grid-template-columns:4fr 8fr; }
@media (max-width:780px){
  .split, .split.split-narrow-label{ grid-template-columns:1fr; gap:var(--sp-4); }
}

.section{ padding:var(--sp-9) 0; }
@media (max-width:720px){ .section{ padding:var(--sp-8) 0; } }
.section-header{ max-width:60ch; margin-bottom:var(--sp-7); }
.section-header h2{ margin-top:var(--sp-3); }

.hairline{ border:none; border-top:var(--border-w) solid var(--line); margin:0; }

/* thin technical grid overlay — used behind hero / data sections */
.tech-grid{
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--ink) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--ink) 6%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
}
:root[data-theme="dark"] .tech-grid, @media (prefers-color-scheme:dark){ .tech-grid{ } }

.visually-hidden{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden;
  clip:rect(0,0,0,0); white-space:nowrap; border:0;
}

.skip-link{
  position:absolute; left:12px; top:-48px; background:var(--ink); color:var(--bg);
  padding:10px 16px; font-family:var(--font-mono); font-size:13px; z-index:100;
  transition:top var(--dur-fast) var(--ease);
}
.skip-link:focus{ top:12px; }
/* ==========================================================================
   EPCI ADVISORY — COMPONENTS
   Depends on tokens in design-system.css. No color/type literals here.
   ========================================================================== */

/* ---- buttons ---- */
.btn{
  display:inline-flex; align-items:center; gap:10px; white-space:nowrap;
  font-family:var(--font-mono); font-size:13px; letter-spacing:0.04em; text-transform:uppercase;
  padding:15px 26px; border-radius:var(--radius); border:1px solid transparent; cursor:pointer;
  text-decoration:none; transition:background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn:active{ transform:translateY(1px); }
.btn-primary{ background:var(--ink); color:var(--bg); border-color:var(--ink); }
.btn-primary:hover{ background:var(--green); border-color:var(--green); color:var(--bg); }
.btn-secondary{ background:transparent; color:var(--ink); border-color:var(--line-strong); }
.btn-secondary:hover{ border-color:var(--ink); }
.btn-on-dark{ background:var(--on-dark); color:var(--surface-dark); border-color:var(--on-dark); }
.btn-on-dark:hover{ background:var(--green); border-color:var(--green); color:var(--on-dark); }
.btn-ghost-on-dark{ background:transparent; color:var(--on-dark); border-color:color-mix(in srgb, var(--on-dark) 35%, transparent); }
.btn-ghost-on-dark:hover{ border-color:var(--on-dark); }
.btn-arrow{ transition:transform var(--dur-fast) var(--ease); }
.btn:hover .btn-arrow{ transform:translateX(3px); }

.text-link{
  font-family:var(--font-mono); font-size:13px; letter-spacing:0.03em; text-transform:uppercase;
  color:var(--ink); text-decoration:none; border-bottom:1px solid var(--line-strong);
  padding-bottom:2px; transition:border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.text-link:hover{ border-color:var(--green); color:var(--green); }

/* ---- site header / nav ---- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:50;
  padding:22px 0; transition:background var(--dur) var(--ease), padding var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom:1px solid transparent;
}
.site-header .container{ display:flex; align-items:center; justify-content:space-between; gap:24px; }
.site-header.is-scrolled{
  background:color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter:blur(10px); border-color:var(--line); padding:14px 0;
}
.brand{
  font-family:var(--font-display); font-weight:800; font-size:16px; letter-spacing:0.02em;
  text-decoration:none; color:inherit; display:flex; align-items:center; gap:10px;
}
.brand .mark{ width:9px; height:9px; background:var(--green); display:inline-block; }

.nav-desktop{ display:flex; align-items:center; gap:var(--sp-6); }
.nav-links{ display:flex; gap:var(--sp-5); list-style:none; margin:0; padding:0; }
.nav-links a{
  text-decoration:none; font-size:14.5px; color:var(--ink-soft); position:relative; padding:4px 0;
  transition:color var(--dur-fast) var(--ease);
}
.nav-links a:hover{ color:var(--ink); }
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px; background:var(--green);
  transition:right var(--dur) var(--ease);
}
.nav-links a:hover::after{ right:0; }

.nav-toggle{
  display:none; background:none; border:none; padding:8px; cursor:pointer;
  flex-direction:column; gap:5px;
}
.nav-toggle span{ width:22px; height:1.5px; background:var(--ink); display:block; transition:transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-6.5px) rotate(-45deg); }

.mobile-menu{
  position:fixed; inset:0; background:var(--surface-dark); color:var(--on-dark); z-index:49;
  display:flex; flex-direction:column; justify-content:center; padding:0 var(--edge);
  transform:translateY(-8px); opacity:0; pointer-events:none;
  transition:opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.mobile-menu.is-open{ opacity:1; transform:translateY(0); pointer-events:auto; }
.mobile-menu ul{ list-style:none; margin:0; padding:0; }
.mobile-menu a{
  display:block; padding:14px 0; font-family:var(--font-display); font-size:32px; font-weight:800;
  text-decoration:none; color:var(--on-dark); border-bottom:1px solid color-mix(in srgb, var(--on-dark) 15%, transparent);
}
.mobile-menu .mm-cta{ margin-top:var(--sp-6); }

@media (max-width:880px){
  .nav-desktop{ display:none; }
  .nav-toggle{ display:flex; }
}

/* ---- hero ---- */
.hero{
  position:relative; padding:calc(var(--sp-9) + 56px) 0 var(--sp-9);
  background:var(--surface-dark); color:var(--on-dark); overflow:hidden;
}
.hero .container{ position:relative; z-index:2; }
.hero-eyebrow{ color:color-mix(in srgb, var(--on-dark) 70%, transparent); }
.hero h1{
  color:var(--on-dark); margin:var(--sp-4) 0 var(--sp-5); max-width:14ch;
}
.hero h1 em{ font-style:normal; color:var(--green); }
.hero .lede{ color:color-mix(in srgb, var(--on-dark) 78%, transparent); font-size:var(--step-1); max-width:46ch; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-top:var(--sp-6); }
.hero-coords{
  position:absolute; font-family:var(--font-mono); font-size:11px; letter-spacing:.05em;
  color:color-mix(in srgb, var(--on-dark) 34%, transparent); z-index:1;
}
.hero-coords.tl{ top:112px; left:var(--edge); }
.hero-coords.br{ bottom:28px; right:var(--edge); text-align:right; }
@media (max-width:640px){ .hero-coords{ display:none; } }
.hero::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--on-dark) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--on-dark) 6%, transparent) 1px, transparent 1px);
  background-size:72px 72px; z-index:0;
}
/* grid "node" markers — reads as a power-grid/substation overlay on the technical grid */
.hero::after{
  content:""; position:absolute; inset:0; z-index:0; opacity:.5;
  background-image: radial-gradient(circle, color-mix(in srgb, var(--green) 65%, transparent) 1.4px, transparent 1.6px);
  background-size:216px 216px; background-position:36px 36px;
}

/* wind turbine silhouette — decorative, sits behind hero copy */
.hero-turbine{
  position:absolute; right:-30px; bottom:-30px; width:300px; max-width:36vw;
  color:var(--on-dark); opacity:.16; z-index:1; pointer-events:none;
}
.hero-turbine .blades{ transform-origin:150px 136px; animation:turbine-spin 140s linear infinite; }
@keyframes turbine-spin{ to{ transform:rotate(360deg); } }
@media (max-width:640px){ .hero-turbine{ display:none; } }
@media (prefers-reduced-motion:no-preference){
  .hero h1{ animation:rise var(--dur-slow) var(--ease) both; }
  .hero .lede{ animation:rise var(--dur-slow) var(--ease) 80ms both; }
  .hero-actions{ animation:rise var(--dur-slow) var(--ease) 160ms both; }
}
@keyframes rise{ from{ opacity:0; transform:translateY(14px); } to{ opacity:1; transform:translateY(0); } }

/* ---- section header pattern ---- */
.section-header .eyebrow{ margin-bottom:var(--sp-3); }

/* ---- service cards (compact — kept as an available component) ---- */
.service-grid{ display:grid; grid-template-columns:repeat(3,1fr); border:1px solid var(--line); border-bottom:none; }
@media (max-width:920px){ .service-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:620px){ .service-grid{ grid-template-columns:1fr; } }
.service-card{
  padding:var(--sp-6); border-right:1px solid var(--line); border-bottom:1px solid var(--line);
  display:flex; flex-direction:column; gap:var(--sp-3); text-decoration:none; color:inherit;
  transition:background var(--dur-fast) var(--ease);
}
.service-card:hover{ background:var(--bg-raised); }
.service-card .num{ font-family:var(--font-mono); font-size:12px; color:var(--green); }
.service-card h3{ font-size:var(--step-1); }
.service-card p{ font-size:14.5px; color:var(--ink-soft); margin-bottom:0; }
.service-card .go{ margin-top:auto; font-family:var(--font-mono); font-size:12.5px; letter-spacing:.04em; text-transform:uppercase; color:var(--ink-faint); display:flex; align-items:center; gap:6px; }
.service-card:hover .go{ color:var(--green); }

/* ---- services: in-page jump list ---- */
.service-index{
  display:flex; flex-wrap:wrap; gap:8px 24px; margin:var(--sp-6) 0 0; padding-bottom:var(--sp-5);
  border-bottom:1px solid var(--line);
}
.service-index a{
  font-family:var(--font-mono); font-size:12.5px; letter-spacing:.03em; color:var(--ink-faint);
  text-decoration:none; transition:color var(--dur-fast) var(--ease);
}
.service-index a:hover{ color:var(--green); }

/* ---- services: deep-dive rows ---- */
.service-deep-row{
  display:grid; grid-template-columns:1.05fr 0.95fr; gap:var(--sp-7); align-items:center;
  padding:var(--sp-8) 0; border-bottom:1px solid var(--line); scroll-margin-top:96px;
}
.service-deep-row:last-child{ border-bottom:none; }
.service-deep-row.rev .service-deep-visual{ order:2; }
.service-deep-row.rev .service-deep-content{ order:1; }
@media (max-width:860px){
  .service-deep-row{ grid-template-columns:1fr; gap:var(--sp-5); }
  .service-deep-row.rev .service-deep-visual, .service-deep-row.rev .service-deep-content{ order:initial; }
}
.service-deep-content .num{ font-family:var(--font-mono); font-size:12px; color:var(--green); }
.service-deep-content h3{ margin:8px 0 14px; font-size:var(--step-2); }
.service-deep-content .challenge{ color:var(--ink-soft); }
.service-covers{
  list-style:none; margin:18px 0 0; padding:0; display:grid; grid-template-columns:1fr 1fr; gap:9px 18px;
}
.service-covers li{ font-size:13.5px; padding-left:16px; position:relative; color:var(--ink-soft); }
.service-covers li::before{ content:""; position:absolute; left:0; top:8px; width:6px; height:1px; background:var(--green); }

.service-deep-visual{
  color:var(--ink-faint); background:var(--bg-inset); border:1px solid var(--line); padding:var(--sp-6);
}
.service-deep-visual svg{ width:100%; height:auto; display:block; }
.service-deep-visual svg .accent{ stroke:var(--green); fill:var(--green); }

.product-teaser{
  margin-top:var(--sp-6); border:1px dashed var(--line-strong); padding:13px 16px;
  display:flex; align-items:flex-start; gap:12px;
}
.product-teaser .dot{ width:6px; height:6px; border-radius:50%; background:var(--green); flex:none; margin-top:6px; }
.product-teaser .txt{ font-size:13px; color:var(--ink-soft); line-height:1.5; }
.product-teaser .txt b{
  font-family:var(--font-mono); font-size:11px; letter-spacing:.05em; text-transform:uppercase;
  color:var(--green); font-weight:600; display:block; margin-bottom:3px;
}

/* ---- lifecycle strip ---- */
.lifecycle{ display:flex; overflow-x:auto; border:1px solid var(--line); margin-top:var(--sp-6); }
.lifecycle-stage{
  flex:1 0 150px; padding:var(--sp-5) var(--sp-4); border-right:1px solid var(--line);
  cursor:pointer; background:var(--bg); transition:background var(--dur-fast) var(--ease);
}
.lifecycle-stage:last-child{ border-right:none; }
.lifecycle-stage:hover, .lifecycle-stage[aria-pressed="true"]{ background:var(--surface-dark); color:var(--on-dark); }
.lifecycle-stage .n{ font-family:var(--font-mono); font-size:11px; color:var(--green); display:block; margin-bottom:8px; }
.lifecycle-stage .t{ font-family:var(--font-display); font-weight:800; font-size:14.5px; }
.lifecycle-panel{ border:1px solid var(--line); border-top:none; padding:var(--sp-6); background:var(--bg-inset); }

/* ---- case study / insight cards ---- */
.card-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:var(--gutter); margin-top:var(--sp-6); }
@media (max-width:920px){ .card-grid{ grid-template-columns:1fr; } }
.case-card{
  border:1px solid var(--line); text-decoration:none; color:inherit; display:flex; flex-direction:column;
  transition:border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.case-card:hover{ border-color:var(--ink); transform:translateY(-3px); }
.case-card .media{ aspect-ratio:4/3; background:var(--bg-inset); border-bottom:1px solid var(--line); }
.case-card .body{ padding:var(--sp-5); display:flex; flex-direction:column; gap:var(--sp-2); flex:1; }
.case-card .tag{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; color:var(--green); }
.case-card h3{ font-size:var(--step-1); }
.case-card p{ font-size:14.5px; color:var(--ink-soft); margin-bottom:0; }
.case-card .metric{ margin-top:auto; padding-top:var(--sp-4); display:flex; align-items:baseline; gap:8px; }
.case-card .metric b{ font-family:var(--font-display); font-size:28px; font-weight:800; font-variant-numeric:tabular-nums; }
.case-card .metric span{ font-size:12.5px; color:var(--ink-faint); }

/* ---- metric / stat ---- */
.stat{ display:flex; flex-direction:column; gap:4px; }
.stat b{ font-family:var(--font-display); font-size:var(--step-3); font-weight:800; font-variant-numeric:tabular-nums; }
.stat span{ font-family:var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-faint); }

/* ---- forms ---- */
.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:var(--sp-4); }
.field label{ font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-soft); }
.field input, .field select, .field textarea{
  font-family:var(--font-body); font-size:15px; padding:12px 14px; background:var(--bg);
  border:1px solid var(--line-strong); border-radius:var(--radius); color:var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus{ outline:2px solid var(--focus); outline-offset:1px; border-color:var(--focus); }
.field-error{ font-size:12.5px; color:#8C3B2E; }

/* ---- legal pages (imprint / privacy) ---- */
.legal-header{ padding:calc(var(--sp-9) + 40px) 0 var(--sp-7); border-bottom:1px solid var(--line); }
.legal-back{ font-family:var(--font-mono); font-size:12.5px; color:var(--ink-faint); text-decoration:none; }
.legal-back:hover{ color:var(--green); }
.legal-body{ padding:var(--sp-8) 0; max-width:var(--container-narrow); margin:0 auto; }
.legal-body h2{ font-size:var(--step-1); margin:var(--sp-7) 0 var(--sp-3); }
.legal-body h2:first-child{ margin-top:0; }
.legal-body p{ max-width:none; font-size:15px; color:var(--ink-soft); }
.legal-body dl{ display:grid; grid-template-columns:auto 1fr; gap:6px 18px; margin:var(--sp-3) 0; font-size:15px; }
.legal-body dt{ font-family:var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.04em; color:var(--ink-faint); padding-top:2px; }
.legal-body dd{ margin:0; color:var(--ink); }
.legal-lang-divider{ margin:var(--sp-8) 0; padding-top:var(--sp-7); border-top:2px solid var(--ink); }
.todo{ background:var(--flag-soft); color:var(--flag); padding:1px 7px; border-radius:2px; font-weight:600; font-size:0.95em; }

/* ---- footer ---- */
.site-footer{ position:relative; background:var(--surface-dark); color:var(--on-dark); padding:var(--sp-9) 0 var(--sp-6); }
/* battery-cell rack motif — thin divider along the top edge */
.site-footer::before{
  content:""; position:absolute; top:0; left:0; right:0; height:5px; opacity:.55;
  background-image:repeating-linear-gradient(90deg, var(--green) 0 12px, transparent 12px 18px);
}
.site-footer a{ text-decoration:none; color:color-mix(in srgb, var(--on-dark) 78%, transparent); }
.site-footer a:hover{ color:var(--on-dark); }
.footer-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:var(--sp-6); }
@media (max-width:780px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
.footer-grid h5{ font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.06em; color:color-mix(in srgb, var(--on-dark) 55%, transparent); margin:0 0 14px; }
.footer-grid ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px; font-size:14.5px; }
.footer-bottom{ margin-top:var(--sp-8); padding-top:var(--sp-5); border-top:1px solid color-mix(in srgb, var(--on-dark) 15%, transparent); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-family:var(--font-mono); font-size:12px; color:color-mix(in srgb, var(--on-dark) 55%, transparent); }