/* ============================================================
   Tippa — shared stylesheet
   Ledger/docket-inspired design system for a UK waste-tracking
   product. Tokens below are the single source of truth.
   ============================================================ */

:root{
  --ink:        #10171B;   /* wordmark / dark bands / primary text */
  --ink-70:     rgba(16,23,27,.72);
  --ink-45:     rgba(16,23,27,.45);
  --paper:      #F7F4ED;   /* light bands, matches logo backing */
  --paper-dim:  #EFEBE0;   /* slightly deeper paper for alt rows */
  --chalk:      #F7F4ED;   /* light text on dark bands */
  --chalk-70:   rgba(247,244,237,.72);
  --chalk-45:   rgba(247,244,237,.45);
  --signal:     #E9754F;   /* the orange dot */
  --signal-ink: #7A2E12;   /* accessible orange-on-paper text use */
  --steel:      #4F6461;   /* muted teal-grey secondary accent */
  --line-dark:  rgba(16,23,27,.14);
  --line-light: rgba(247,244,237,.18);

  --serif: "Source Serif 4", Georgia, serif;
  --head: "Archivo", "Arial Narrow", sans-serif;
  --body: "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --maxw: 1120px;
  --pad: clamp(20px, 5vw, 56px);
  --radius: 6px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3,h4{
  font-family:var(--head);
  font-weight:700;
  letter-spacing:-0.01em;
  line-height:1.08;
  margin:0 0 .5em;
}
p{ margin:0 0 1em; }
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding-left:var(--pad);
  padding-right:var(--pad);
}
.visually-hidden{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}
:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:3px;
}

/* ---------- buttons & links ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family:var(--body);
  font-weight:600;
  font-size:.98rem;
  padding:.85em 1.4em;
  border-radius:var(--radius);
  border:1px solid transparent;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary{
  background:var(--signal);
  color:var(--ink);
}
.btn-primary:hover{ background:#DE6740; }
.btn-ghost-dark{
  border-color:var(--line-dark);
  color:var(--ink);
  background:transparent;
}
.btn-ghost-dark:hover{ border-color:var(--ink); }
.btn-ghost-light{
  border-color:var(--line-light);
  color:var(--chalk);
  background:transparent;
}
.btn-ghost-light:hover{ border-color:var(--chalk); }

.text-link{
  text-decoration:underline;
  text-underline-offset:.2em;
  text-decoration-color:var(--ink-45);
  font-weight:600;
}
.text-link:hover{ text-decoration-color:currentColor; }
.text-link.on-dark{ text-decoration-color:var(--chalk-45); }

/* ---------- one-page anchor offset ---------- */
section[id]{ scroll-margin-top:86px; }

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:40;
  background:var(--paper);
  border-bottom:1px solid var(--line-dark);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height:74px;
}
.brand{ display:flex; align-items:center; gap:.6em; text-decoration:none; }
.brand img{ height:34px; width:auto; border-radius:5px; }
.brand-word{ display:none; }

.main-nav{ display:flex; align-items:center; gap:2.1em; }
.main-nav ul{
  list-style:none; margin:0; padding:0;
  display:flex; gap:1.9em;
}
.main-nav a{
  text-decoration:none;
  font-weight:600;
  font-size:.96rem;
  color:var(--ink-70);
}
.main-nav a:hover, .main-nav a.is-active{ color:var(--ink); }
.header-actions{ display:flex; align-items:center; gap:1.4em; }
.header-actions .signin{ font-weight:600; font-size:.96rem; text-decoration:none; color:var(--ink-70); }
.header-actions .signin:hover{ color:var(--ink); }

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line-dark); border-radius:var(--radius);
  width:42px; height:38px; cursor:pointer;
  align-items:center; justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:18px; height:2px; background:var(--ink);
  position:relative; transition:transform .15s ease, opacity .15s ease;
}
.nav-toggle span::before{ position:absolute; top:-6px; }
.nav-toggle span::after{ position:absolute; top:6px; }

@media (max-width:860px){
  .main-nav{
    position:fixed; inset:74px 0 0 0; background:var(--paper);
    flex-direction:column; align-items:flex-start; gap:0;
    padding:8px var(--pad) 28px;
    transform:translateY(-8px);
    opacity:0; pointer-events:none; visibility:hidden;
    transition:opacity .15s ease, transform .15s ease;
    border-top:1px solid var(--line-dark);
  }
  .main-nav.is-open{ opacity:1; pointer-events:auto; visibility:visible; transform:translateY(0); }
  .main-nav ul{ flex-direction:column; gap:0; width:100%; }
  .main-nav li{ width:100%; border-bottom:1px solid var(--line-dark); }
  .main-nav a{ display:block; padding:16px 2px; }
  .header-actions{ flex-direction:column; align-items:flex-start; gap:14px; margin-top:8px; width:100%; }
  .header-actions .btn{ width:100%; justify-content:center; }
  .nav-toggle{ display:flex; }
}

/* ---------- bands ---------- */
.band{ padding:76px 0; }
.band-tight{ padding:52px 0; }
.band-dark{ background:var(--ink); color:var(--chalk); }
.band-dark h1, .band-dark h2, .band-dark h3{ color:var(--chalk); }
.band-dark p{ color:var(--chalk-70); }
.band-alt{ background:var(--paper-dim); }
.rule-top{ border-top:1px solid var(--line-dark); }
.band-dark.rule-top{ border-top:1px solid var(--line-light); }

/* ---------- hero ---------- */
.hero{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:56px;
  align-items:center;
}
.hero .kicker{
  display:inline-flex; align-items:center; gap:.55em;
  font-weight:600; font-size:.85rem; color:var(--chalk-70);
  margin-bottom:1.1em;
}
.dot{
  width:9px; height:9px; border-radius:50%;
  background:var(--signal); flex:none;
}
.hero h1{ font-size:clamp(2.4rem,4.6vw,3.6rem); max-width:14ch; }
.hero .lede{ font-size:1.18rem; max-width:46ch; color:var(--chalk-70); }
.hero .cta-row{ display:flex; align-items:center; gap:1.6em; flex-wrap:wrap; margin:1.9em 0 1.4em; }
.hero .fine{ font-size:.92rem; color:var(--chalk-45); }
.hero-panel{
  border:1px solid var(--line-light);
  border-radius:10px;
  padding:28px;
  background:rgba(247,244,237,.04);
}
.hero-panel .ledger-row:last-child{ border-bottom:none; }

@media (max-width:920px){
  .hero{ grid-template-columns:1fr; }
}

/* ---------- ledger list: label + text row divided by hairlines ---------- */
.ledger{ border-top:1px solid var(--line-dark); }
.band-dark .ledger{ border-top:1px solid var(--line-light); }
.ledger-row{
  display:grid;
  grid-template-columns:220px 1fr;
  gap:32px;
  padding:26px 0;
  border-bottom:1px solid var(--line-dark);
}
.band-dark .ledger-row{ border-bottom:1px solid var(--line-light); }
.ledger-row h3{ font-size:1.05rem; margin:0; }
.ledger-row .desc{ margin:0; color:var(--ink-70); max-width:52ch; }
.band-dark .ledger-row .desc{ color:var(--chalk-70); }
@media (max-width:700px){
  .ledger-row{ grid-template-columns:1fr; gap:8px; }
}

/* ---------- section headers ---------- */
.section-head{ max-width:640px; margin-bottom:2.6em; }
.section-head h2{ font-size:clamp(1.7rem,3vw,2.35rem); }
.section-head .lede{ color:var(--ink-70); font-size:1.08rem; }
.band-dark .section-head .lede{ color:var(--chalk-70); }

/* ---------- three/two column grids ---------- */
.grid{ display:grid; gap:36px; }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-2{ grid-template-columns:repeat(2,1fr); }
@media (max-width:860px){ .grid-3{ grid-template-columns:1fr 1fr; } }
@media (max-width:640px){ .grid-3, .grid-2{ grid-template-columns:1fr; } }

.card{
  border:1px solid var(--line-dark);
  border-radius:8px;
  padding:28px 26px;
}
.band-dark .card{ border-color:var(--line-light); }
.card h3{ font-size:1.08rem; }
.card p{ color:var(--ink-70); margin-bottom:0; }
.band-dark .card p{ color:var(--chalk-70); }

/* ---------- numbered steps (genuine sequence only) ---------- */
.steps{ counter-reset:step; }
.step{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:26px;
  padding:30px 0;
  border-bottom:1px solid var(--line-dark);
}
.step:last-child{ border-bottom:none; }
.step-num{
  counter-increment:step;
  font-family:var(--head); font-weight:700; font-size:1.6rem;
  color:var(--signal-ink);
}
.step h3{ font-size:1.15rem; }
.step p{ color:var(--ink-70); max-width:56ch; margin-bottom:0; }
@media (max-width:640px){ .step{ grid-template-columns:1fr; gap:8px; } }

/* ---------- tag / stamp ---------- */
.stamp{
  display:inline-block;
  border:1px solid var(--signal);
  color:var(--signal-ink);
  font-weight:700; font-size:.8rem;
  padding:.35em .8em;
  border-radius:4px;
  transform:rotate(-1.2deg);
  margin-bottom:1em;
}
.band-dark .stamp{ color:var(--signal); }

/* ---------- audience / feature checklist ---------- */
.checklist{ list-style:none; margin:0; padding:0; }
.checklist li{
  position:relative;
  padding-left:1.6em;
  margin-bottom:.65em;
  color:var(--ink-70);
}
.band-dark .checklist li{ color:var(--chalk-70); }
.checklist li::before{
  content:"";
  position:absolute; left:0; top:.55em;
  width:7px; height:7px; border-radius:50%;
  background:var(--signal);
}

/* ---------- pillar strip (three USPs, one glance) ---------- */
.pillars{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line-dark);
  border-bottom:1px solid var(--line-dark);
}
.pillar{ padding:34px 32px; }
.pillar:not(:first-child){ border-left:1px solid var(--line-dark); }
.pillar h3{ font-size:1.05rem; margin-bottom:.4em; }
.pillar p{ color:var(--ink-70); margin-bottom:.9em; }
@media (max-width:860px){
  .pillars{ grid-template-columns:1fr; border-top:none; }
  .pillar{ border-left:none !important; border-top:1px solid var(--line-dark); padding:26px var(--pad); margin:0 calc(-1 * var(--pad)); }
}

/* ---------- free / paid comparison (replaces pricing cards) ---------- */
.compare{ display:grid; grid-template-columns:repeat(2,1fr); gap:44px; }
.compare-col{ padding-top:22px; border-top:3px solid var(--line-dark); }
.compare-col.is-free{ border-top-color:var(--signal); }
.compare-col h3{ font-size:1.1rem; }
.compare-col .compare-tag{ font-size:.88rem; color:var(--ink-45); margin-bottom:1em; }
@media (max-width:700px){ .compare{ grid-template-columns:1fr; gap:32px; } }

/* ---------- faq (details/summary, no JS needed) ---------- */
.faq-item{ border-bottom:1px solid var(--line-dark); }
.faq-item summary{
  cursor:pointer;
  list-style:none;
  padding:22px 28px 22px 0;
  font-family:var(--head); font-weight:700; font-size:1.05rem;
  position:relative;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+";
  position:absolute; right:0; top:20px;
  font-family:var(--body); font-weight:400; font-size:1.4rem; color:var(--ink-45);
}
.faq-item[open] summary::after{ content:"–"; }
.faq-item .faq-body{ padding:0 40px 24px 0; color:var(--ink-70); max-width:60ch; }

/* ---------- forms ---------- */
.form-grid{ display:grid; gap:22px; grid-template-columns:1fr 1fr; }
.form-grid .full{ grid-column:1 / -1; }
@media (max-width:640px){ .form-grid{ grid-template-columns:1fr; } }
label{ display:block; font-weight:600; font-size:.92rem; margin-bottom:.5em; }
input, select, textarea{
  width:100%;
  font-family:var(--body); font-size:1rem;
  padding:.85em .9em;
  border:1px solid var(--line-dark);
  border-radius:var(--radius);
  background:var(--paper);
  color:var(--ink);
}
input:focus, select:focus, textarea:focus{ outline:2px solid var(--signal); outline-offset:1px; border-color:var(--signal); }
textarea{ min-height:130px; resize:vertical; }
.form-note{ font-size:.88rem; color:var(--ink-45); margin-top:.9em; }

/* ---------- callout / notice boxes ---------- */
.notice{
  border-left:3px solid var(--signal);
  padding:6px 0 6px 26px;
}
.notice p:last-child{ margin-bottom:0; }
.notice.on-dark{ border-left-color:var(--signal); }

/* ---------- help / contact route lists ---------- */
.route-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:34px; }
@media (max-width:640px){ .route-list{ grid-template-columns:1fr; } }
.route-list dt{ font-family:var(--head); font-weight:700; margin-bottom:.35em; }
.route-list dd{ margin:0; color:var(--ink-70); }

.help-cats{ display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--line-dark); border:1px solid var(--line-dark); }
.help-cats a{
  display:block; background:var(--paper); padding:22px 20px;
  text-decoration:none; font-weight:600;
}
.help-cats a:hover{ background:var(--paper-dim); }
@media (max-width:860px){ .help-cats{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:480px){ .help-cats{ grid-template-columns:1fr; } }

/* ---------- footer ---------- */
.site-footer{ background:var(--ink); color:var(--chalk); padding:64px 0 34px; }
.footer-top{
  display:flex; justify-content:space-between; gap:40px; flex-wrap:wrap;
  padding-bottom:40px; margin-bottom:28px; border-bottom:1px solid var(--line-light);
}
/* tippa-wordmark.png is solid black (see CLAUDE.md's Brand section - it's
   the only mark used anywhere, no separate light/dark variant exists), so
   on this dark footer band it needs flattening to white first (brightness
   0 blackens every opaque pixel regardless of original hue, including the
   orange dot) then inverting to white - otherwise it's invisible against
   --ink. */
.footer-brand .brand img{ height:30px; filter:brightness(0) invert(1); }
.footer-brand p{ color:var(--chalk-70); max-width:34ch; margin-top:1em; }
.footer-cols{ display:flex; gap:56px; flex-wrap:wrap; }
.footer-cols h4{ color:var(--chalk); font-size:.92rem; margin-bottom:1em; }
.footer-cols ul{ list-style:none; margin:0; padding:0; }
.footer-cols li{ margin-bottom:.7em; }
.footer-cols a{ text-decoration:none; color:var(--chalk-70); font-size:.95rem; }
.footer-cols a:hover{ color:var(--chalk); }
.footer-legal{ display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; font-size:.85rem; color:var(--chalk-45); }
.footer-legal nav{ display:flex; gap:1.4em; flex-wrap:wrap; }
.footer-legal a{ text-decoration:none; color:var(--chalk-45); }
.footer-legal a:hover{ color:var(--chalk-70); }
.footer-notice{ font-size:.85rem; color:var(--chalk-45); margin-top:22px; max-width:78ch; }

/* ---------- misc ---------- */
.center{ text-align:center; }
.mt-0{ margin-top:0; }
.eyebrow-plain{ font-size:.92rem; font-weight:600; color:var(--signal-ink); margin-bottom:.6em; }
.band-dark .eyebrow-plain{ color:var(--signal); }