/* DoAide brand tokens: Inter, teal-600 accent, slate neutrals. */
:root {
  --da-teal:   #0d9488;
  --da-amber:  #d97706;
  --da-blue:   #0284c7;
  --da-indigo: #4f46e5;

  --bg:            #ffffff;
  --bg-subtle:     #f8fafc;
  --bg-card:       #ffffff;
  --bg-muted:      #f1f5f9;
  --border:        #e2e8f0;
  --border-strong: #cbd5e1;
  --text:          #0f172a;
  --text-2:        #475569;
  --text-3:        #64748b;
  --accent:        #0d9488;
  --accent-strong: #0f766e;
  --accent-soft:   #ccfbf1;
  --accent-text:   #0f766e;
  --on-accent:     #ffffff;
  --grid-line:     rgba(15, 23, 42, 0.05);
  --glow:          rgba(13, 148, 136, 0.14);
  --shadow:        0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -12px rgba(15, 23, 42, 0.12);
  --shadow-hover:  0 1px 2px rgba(15, 23, 42, 0.06), 0 20px 40px -16px rgba(15, 23, 42, 0.22);
  --radius: 14px;
  --maxw: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:            #0a0a0b;
    --bg-subtle:     #0f1012;
    --bg-card:       #121316;
    --bg-muted:      #1a1c20;
    --border:        #23262c;
    --border-strong: #33373f;
    --text:          #f1f5f9;
    --text-2:        #a3acb9;
    --text-3:        #7c8594;
    --accent:        #2dd4bf;
    --accent-strong: #5eead4;
    --accent-soft:   rgba(45, 212, 191, 0.12);
    --accent-text:   #5eead4;
    --on-accent:     #042f2e;
    --grid-line:     rgba(255, 255, 255, 0.04);
    --glow:          rgba(45, 212, 191, 0.12);
    --shadow:        0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-hover:  0 20px 40px -16px rgba(0, 0, 0, 0.7);
  }
}
:root[data-theme="dark"] {
  --bg:            #0a0a0b;
  --bg-subtle:     #0f1012;
  --bg-card:       #121316;
  --bg-muted:      #1a1c20;
  --border:        #23262c;
  --border-strong: #33373f;
  --text:          #f1f5f9;
  --text-2:        #a3acb9;
  --text-3:        #7c8594;
  --accent:        #2dd4bf;
  --accent-strong: #5eead4;
  --accent-soft:   rgba(45, 212, 191, 0.12);
  --accent-text:   #5eead4;
  --on-accent:     #042f2e;
  --grid-line:     rgba(255, 255, 255, 0.04);
  --glow:          rgba(45, 212, 191, 0.12);
  --shadow:        0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-hover:  0 20px 40px -16px rgba(0, 0, 0, 0.7);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "cv11", "ss01";
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 100; background: var(--bg-card); padding: 8px 12px; border-radius: 8px; }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.125rem; letter-spacing: -0.02em; }
.brand__mark { width: 26px; height: 26px; }
.nav { display: flex; align-items: center; gap: 28px; font-size: 0.9375rem; color: var(--text-2); }
.nav a:hover { color: var(--text); }
.header__actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 36px; height: 36px;
  border: 1px solid var(--border); border-radius: 9px; background: transparent; color: var(--text-2); cursor: pointer;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
.icon-btn svg { width: 17px; height: 17px; }
.theme-icon--dark { display: none; }
:root[data-theme="dark"] .theme-icon--light { display: none; }
:root[data-theme="dark"] .theme-icon--dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-icon--light { display: none; }
  :root:not([data-theme="light"]) .theme-icon--dark { display: block; }
}
.burger { display: none; }
.mobile-nav { display: none; border-top: 1px solid var(--border); padding: 12px 24px 20px; }
.mobile-nav a { display: block; padding: 10px 0; color: var(--text-2); font-weight: 500; }
.mobile-nav.is-open { display: block; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px; border-radius: 10px; font-weight: 600; font-size: 0.9375rem;
  border: 1px solid transparent; transition: background .15s, border-color .15s, transform .15s;
  white-space: nowrap;
}
.btn--sm { height: 36px; padding: 0 14px; font-size: 0.875rem; border-radius: 9px; }
.btn--primary { background: var(--text); color: var(--bg); }
.btn--primary:hover { transform: translateY(-1px); }
.btn--ghost { border-color: var(--border); color: var(--text); background: var(--bg-card); }
.btn--ghost:hover { border-color: var(--border-strong); }
.btn svg { width: 16px; height: 16px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 96px 0 72px; text-align: center; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
          mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 100%);
}
.hero::after {
  content: ""; position: absolute; z-index: -1; left: 50%; top: -220px; width: 900px; height: 520px;
  transform: translateX(-50%); background: radial-gradient(closest-side, var(--glow), transparent);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px 5px 6px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--bg-card);
  font-size: 0.8125rem; font-weight: 500; color: var(--text-2);
}
.eyebrow__tag { background: var(--accent-soft); color: var(--accent-text); border-radius: 999px; padding: 2px 8px; font-weight: 600; }
.hero h1 {
  margin: 24px auto 0; max-width: 860px;
  font-size: clamp(2.375rem, 6vw, 4.25rem); line-height: 1.05; letter-spacing: -0.04em; font-weight: 800;
}
.hero h1 .accent {
  background: linear-gradient(100deg, var(--da-teal), var(--da-blue) 55%, var(--da-indigo));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lede { margin: 22px auto 0; max-width: 640px; font-size: clamp(1.0625rem, 2vw, 1.25rem); color: var(--text-2); line-height: 1.55; }
.hero__cta { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.hero__meta { margin-top: 22px; font-size: 0.875rem; color: var(--text-3); }
.hero__meta strong { color: var(--text); font-weight: 600; }

.audience { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; margin-top: 56px; color: var(--text-3); font-size: 0.875rem; font-weight: 500; }
.audience span { display: inline-flex; align-items: center; gap: 8px; }
.audience svg { width: 16px; height: 16px; color: var(--accent); }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section--subtle { background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section__head { max-width: 640px; margin-bottom: 48px; }
.section__head--center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-text); }
.section h2 { margin: 10px 0 0; font-size: clamp(1.75rem, 3.6vw, 2.5rem); line-height: 1.15; letter-spacing: -0.03em; font-weight: 700; }
.section__sub { margin: 14px 0 0; color: var(--text-2); font-size: 1.0625rem; }

/* ---------- Products ---------- */
.products { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.product {
  --tint: var(--da-teal);
  position: relative; display: flex; flex-direction: column;
  padding: 28px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-card); box-shadow: var(--shadow);
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.product:hover { border-color: var(--border-strong); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.product--flagship { grid-column: 1 / -1; }
.product--einvoice { --tint: var(--da-blue); }
.product--taxfile  { --tint: var(--da-amber); }
.product--comply   { --tint: var(--da-indigo); }
.product__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.product__icon {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 11px;
  color: var(--tint); background: color-mix(in srgb, var(--tint) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--tint) 22%, transparent);
}
.product__icon svg { width: 22px; height: 22px; }
.badge {
  font-size: 0.75rem; font-weight: 600; padding: 4px 10px; border-radius: 999px;
  color: var(--tint); background: color-mix(in srgb, var(--tint) 10%, transparent);
}
.product h3 { margin: 20px 0 0; font-size: 1.375rem; letter-spacing: -0.02em; font-weight: 700; }
.product__domain { font-size: 0.875rem; color: var(--text-3); font-weight: 500; }
.product__desc { margin: 10px 0 0; color: var(--text-2); }
.product__list { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 8px; font-size: 0.9375rem; color: var(--text-2); }
.product__list li { display: flex; gap: 10px; align-items: flex-start; }
.product__list svg { flex: none; width: 16px; height: 16px; margin-top: 4px; color: var(--tint); }
.product__link { margin-top: auto; padding-top: 24px; display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: 0.9375rem; color: var(--text); }
.product__link svg { width: 16px; height: 16px; transition: transform .2s; }
.product:hover .product__link svg { transform: translateX(3px); }
.product--flagship .product__body { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: start; }
.product--flagship .product__list { margin-top: 20px; }

/* Flagship chat preview */
.chat {
  border: 1px solid var(--border); border-radius: 12px; background: var(--bg-subtle);
  padding: 16px; display: grid; gap: 12px; font-size: 0.875rem;
}
.chat__row { display: flex; }
.chat__row--user { justify-content: flex-end; }
.chat__bubble { max-width: 88%; padding: 10px 14px; border-radius: 12px; line-height: 1.5; }
.chat__row--user .chat__bubble { background: var(--text); color: var(--bg); border-bottom-right-radius: 4px; }
.chat__row--bot .chat__bubble { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-2); border-bottom-left-radius: 4px; }
.chat__bubble b { color: var(--text); font-weight: 600; }
.chat__label { font-size: 0.75rem; color: var(--text-3); font-weight: 500; display: flex; align-items: center; gap: 6px; }
.chat__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--da-teal); }

/* ---------- Principles ---------- */
.principles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.principle { background: var(--bg-card); padding: 28px; }
.principle svg { width: 22px; height: 22px; color: var(--accent); }
.principle h3 { margin: 16px 0 0; font-size: 1.0625rem; font-weight: 600; letter-spacing: -0.01em; }
.principle p { margin: 8px 0 0; color: var(--text-2); font-size: 0.9375rem; }

/* ---------- Pricing teaser ---------- */
.pricing {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center;
  padding: 48px; border-radius: 20px; border: 1px solid var(--border);
  background:
    radial-gradient(600px 300px at 100% 0%, var(--glow), transparent 70%),
    var(--bg-card);
}
.pricing h2 { margin: 10px 0 0; }
.price { display: flex; align-items: baseline; gap: 6px; margin-top: 4px; }
.price__from { font-size: 0.9375rem; color: var(--text-3); font-weight: 500; }
.price__amount { font-size: clamp(2.75rem, 6vw, 3.75rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1; }
.price__per { font-size: 1rem; color: var(--text-2); font-weight: 500; }
.pricing__list { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; color: var(--text-2); font-size: 0.9375rem; }
.pricing__list li { display: flex; gap: 10px; align-items: flex-start; }
.pricing__list svg { flex: none; width: 16px; height: 16px; margin-top: 4px; color: var(--accent); }
.pricing__side { display: grid; gap: 12px; }
.pricing__note { font-size: 0.8125rem; color: var(--text-3); margin: 4px 0 0; }

/* ---------- More tools ---------- */
.more { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.tool {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px;
  border: 1px solid var(--border); border-radius: 12px; background: var(--bg-card);
  transition: border-color .15s;
}
.tool:hover { border-color: var(--border-strong); }
.tool__icon { flex: none; display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; background: var(--bg-muted); color: var(--text-2); }
.tool__icon svg { width: 18px; height: 18px; }
.tool__name { font-weight: 600; font-size: 0.9375rem; }
.tool__desc { font-size: 0.8125rem; color: var(--text-3); }
.tool__arrow { margin-left: auto; color: var(--text-3); width: 16px; height: 16px; }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 0; display: flex; justify-content: space-between; gap: 16px;
  font-weight: 600; font-size: 1.0625rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { flex: none; width: 18px; height: 18px; color: var(--text-3); transition: transform .2s; margin-top: 4px; }
.faq details[open] summary svg { transform: rotate(45deg); }
.faq p { margin: 0 0 20px; color: var(--text-2); }

/* ---------- CTA band ---------- */
.cta { text-align: center; padding: 96px 0; }
.cta h2 { margin: 0 auto; max-width: 720px; }
.cta .hero__cta { margin-top: 28px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-subtle); padding: 56px 0 32px; font-size: 0.9375rem; }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
.footer__about { color: var(--text-2); margin: 14px 0 0; max-width: 320px; font-size: 0.875rem; }
.footer h4 { margin: 0 0 14px; font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-3); }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer ul a { color: var(--text-2); }
.footer ul a:hover { color: var(--text); }
.footer__bottom { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.8125rem; color: var(--text-3); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .product--flagship .product__body { grid-template-columns: 1fr; gap: 24px; }
  .principles { grid-template-columns: 1fr 1fr; }
  .pricing { grid-template-columns: 1fr; padding: 36px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .nav, .header__actions .btn { display: none; }
  .burger { display: inline-grid; }
  .wrap { padding: 0 16px; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
  .section__head { margin-bottom: 32px; }
  .products, .more { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .product { padding: 22px; }
  .pricing { padding: 28px 22px; border-radius: 16px; }
  .hero__cta .btn { flex: 1 1 100%; }
  .cta { padding: 72px 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* GST marketing pages retain the established DoAide brand. */
.hero--gst {text-align:left;padding:80px 0 72px}
.hero-grid {display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:56px}
.hero--gst h1 {font-size:clamp(2.5rem,4.6vw,3.8rem);margin-left:0}
.hero--gst .hero__lede {margin-left:0;font-size:1.125rem}
.hero--gst .hero__cta {justify-content:flex-start}
.eyebrow {flex-wrap:wrap;border-radius:12px}
.sample {background:var(--bg-card);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-hover);overflow:hidden;min-width:0}
.sample__top {padding:24px;border-bottom:1px solid var(--border)}
.sample__top h2 {font-size:1.15rem;margin:10px 0 4px;letter-spacing:-.02em}
.sample__top p,.sample__foot {font-size:.8125rem;color:var(--text-3);margin:0}
.sample__label {display:inline-block;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-text);font-weight:700}
.sample__row {display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center;padding:20px 24px;border-bottom:1px solid var(--border)}
.sample__row strong {display:block;font-size:.9rem}
.sample__row small {color:var(--text-2)}
.status {font-size:.72rem;font-weight:600;border:1px solid var(--border);padding:4px 8px;border-radius:6px;white-space:nowrap}
.status--match {color:var(--accent-text);background:var(--accent-soft)}
.sample__foot {padding:18px 24px;background:var(--bg-subtle)}
.step-num {color:var(--accent-text);font-size:.8125rem;font-weight:700;letter-spacing:.08em}
.text-link {color:var(--accent-text);text-decoration:underline;text-underline-offset:4px}
.article {max-width:760px}.article h1 {font-size:clamp(2.1rem,4vw,3.2rem);line-height:1.12;letter-spacing:-.04em;margin:16px 0 24px}
.article h2 {font-size:1.4rem;margin-top:36px}.article p,.article li {color:var(--text-2)}
.page-intro {padding:72px 0 36px}.resource-grid {display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.resource {display:flex;flex-direction:column;gap:12px;border:1px solid var(--border);border-radius:14px;background:var(--bg-card);padding:28px}
.resource h2,.resource h3 {font-size:1.15rem;line-height:1.4;margin:0}.resource p {margin:0;color:var(--text-2)}.resource a {margin-top:auto;padding-top:8px}
.demo-grid {display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.demo-form {padding:28px;background:var(--bg-subtle);border:1px solid var(--border);border-radius:16px}
.demo-form label {display:block;font-size:.9rem;font-weight:600;margin-bottom:18px}
.demo-form input,.demo-form select,.demo-form textarea {display:block;width:100%;margin-top:6px;padding:12px;font:inherit;color:var(--text);background:var(--bg-card);border:1px solid var(--border-strong);border-radius:8px}
.demo-form textarea {min-height:110px;resize:vertical}.demo-form .btn {width:100%;margin-top:10px}
.fine {font-size:.85rem;color:var(--text-3)}
#request-preview {white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:16px}
[hidden] {display:none!important}
@media(max-width:960px){.hero-grid {gap:32px}.hero--gst h1{font-size:2.8rem}}
@media(max-width:760px){.hero-grid,.demo-grid,.resource-grid{grid-template-columns:1fr}.hero--gst{padding:48px 0}.hero--gst h1{font-size:2.6rem}.sample__row{padding:16px}.demo-grid{gap:28px}.page-intro{padding-top:48px}.demo-form{padding:20px}.header__actions .btn{display:inline-flex;font-size:.75rem;padding:7px 10px}.sample__top{padding:20px}.brand{font-size:1rem}}

.cta h2 {font-size:clamp(1.75rem,3.6vw,2.5rem);line-height:1.15;letter-spacing:-.03em}
section[id] {scroll-margin-top:88px}