/* ==========================================================================
   AUDWeld — Concept 02 "Technical datasheet"
   Light paper canvas, AUDEO crimson as the single accent, blueprint rule grid.
   Built for procurement / QA readers: everything visible, nothing hidden
   behind tabs or accordions. Same behaviour contract as concept 01 so one
   js/audweld.js drives all three directions.
   ========================================================================== */

:root {
  /* AUDEO light tokens, straight from their Elementor kit */
  --paper:  oklch(96.2% 0.001 300);  /* #F5F4F5 */
  --card:   oklch(100% 0 0);         /* #FFFFFF */
  --ink:    oklch(13.5% 0.017 278);  /* #0A0B14 */
  --ink-2:  oklch(49% 0.035 283);    /* #616379 */
  --rule:   oklch(88.5% 0.003 286);  /* #DCDCDE */
  --rule-2: oklch(79% 0.004 286);
  --accent: oklch(44% 0.185 28);     /* #B51717 darkened one step for text use on paper */

  --font-display: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;

  --maxw: 1320px;
  --gut: clamp(18px, 4vw, 56px);
  --sect: clamp(52px, 7vw, 96px);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 400 clamp(14.5px, 0.3vw + 13.8px, 16px)/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--accent); color: #fff; padding: 10px 16px; font: 590 14px/1 var(--font-body); text-decoration: none; transition: top .18s; }
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.section { padding-block: var(--sect); scroll-margin-top: 76px; border-top: 1px solid var(--rule); }

/* --- Type ---------------------------------------------------------------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.1; letter-spacing: -0.02em; text-wrap: balance; }
h1 { font-size: clamp(30px, 2.6vw + 18px, 46px); letter-spacing: -0.025em; }
h2 { font-size: clamp(22px, 1.4vw + 17px, 31px); }
h3 { font-size: clamp(16px, 0.5vw + 14px, 19px); letter-spacing: -0.005em; }
p { text-wrap: pretty; }
.lede { font-size: clamp(15.5px, 0.5vw + 14px, 18px); color: var(--ink-2); max-width: 66ch; }

.label {
  font: 510 11px/1.5 var(--font-mono); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-2);
}
.label--accent { color: var(--accent); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 46px; padding: 0 20px; border: 1px solid transparent;
  font: 510 14.5px/1 var(--font-body); letter-spacing: 0.02em;
  text-decoration: none; cursor: pointer; transition: all .16s;
}
.btn:active { transform: translateY(2px); }
.btn--primary { background: var(--accent); color: #fff; font-weight: 590; }
.btn--primary:hover { background: oklch(38% 0.17 28); }
.btn--ghost { border-color: var(--rule-2); color: var(--ink); background: var(--card); }
.btn--ghost:hover { border-color: var(--ink); }
.btn svg { width: 17px; height: 17px; flex: none; }

/* --- AUDEO chrome --------------------------------------------------------- */
.utility { background: var(--ink); color: var(--paper); font: 510 12px/1 var(--font-body); }
.utility .wrap { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 36px; }
.utility a { text-decoration: none; opacity: .88; }
.utility a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 3px; }
.utility__right { display: flex; gap: 18px; }
@media (max-width: 640px) { .utility__left span { display: none; } }

.masthead { position: sticky; top: 0; z-index: 60; background: color-mix(in oklab, var(--paper) 92%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--rule); }
.masthead .wrap { display: flex; align-items: center; gap: 18px; min-height: 64px; }
.brandlock { display: flex; align-items: center; gap: 13px; text-decoration: none; flex: none; }
.brandlock img { width: clamp(80px, 8vw, 104px); }
.brandlock__rule { width: 1px; height: 24px; background: var(--rule-2); }
.brandlock__product { font: 600 13px/1 var(--font-display); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.nav { margin-left: auto; display: flex; align-items: center; gap: clamp(12px, 1.5vw, 26px); }
.nav a { font: 510 13.5px/1 var(--font-body); color: var(--ink-2); text-decoration: none; padding: 6px 0; border-bottom: 1px solid transparent; transition: all .16s; }
.nav a:hover, .nav a.is-active { color: var(--ink); border-bottom-color: var(--accent); }
.nav__cta { margin-left: 4px; }
/* `.nav a` outranks `.btn` on specificity — re-assert the button's own box. */
.nav a.btn { padding: 0 20px; border-bottom: 0; }
.nav a.btn:hover { border-bottom: 0; }
.nav a.btn--primary, .nav a.btn--primary:hover, .nav a.btn--primary.is-active { color: #fff; }
.nav a.btn--ghost { color: var(--ink); }
.navtoggle { margin-left: auto; width: 44px; height: 44px; display: none; place-items: center; background: var(--card); border: 1px solid var(--rule-2); cursor: pointer; }
.navtoggle svg { width: 20px; height: 20px; }
@media (max-width: 1000px) {
  .navtoggle { display: grid; }
  .nav { position: absolute; inset: 100% 0 auto; margin: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 6px var(--gut) 18px; display: none; }
  .nav.is-open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid var(--rule); }
  .nav a:hover, .nav a.is-active { border-bottom-color: var(--rule); }
  .nav__cta { margin: 14px 0 0; }
}

/* --- Spec-sheet hero ------------------------------------------------------ */
.spechero {
  padding-block: clamp(34px, 4vw, 56px) 0;
  /* blueprint rule grid — functional, this direction is a drawing sheet */
  background-image:
    linear-gradient(to right, oklch(88.5% 0.003 286 / 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(88.5% 0.003 286 / 0.5) 1px, transparent 1px);
  background-size: 48px 48px;
  border-bottom: 1px solid var(--rule);
}
.spechero__grid { display: grid; gap: clamp(26px, 3vw, 44px); }
@media (min-width: 1000px) { .spechero__grid { grid-template-columns: 1.15fr 0.85fr; align-items: end; } }
.spechero__logo { width: clamp(190px, 22vw, 250px); margin-bottom: 22px; padding: 12px 16px; background: var(--ink); }
.spechero h1 { margin: 14px 0 12px; }
.spechero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

/* data block — the hero's right column is a spec table, not a photo */
.datablock { background: var(--card); border: 1px solid var(--rule-2); }
.datablock__head { padding: 12px 16px; border-bottom: 1px solid var(--rule-2); background: var(--paper); display: flex; justify-content: space-between; gap: 10px; align-items: baseline; }
.datablock dl { display: grid; grid-template-columns: minmax(96px, 36%) 1fr; }
.datablock dt { padding: 11px 16px; border-bottom: 1px solid var(--rule); font: 510 11px/1.5 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.datablock dd { margin: 0; padding: 11px 16px; border-bottom: 1px solid var(--rule); border-left: 1px solid var(--rule); font-size: 14px; }
.datablock dl > :nth-last-child(-n+2) { border-bottom: 0; }

/* steel families as a measured strip */
.families { display: grid; gap: 1px; background: var(--rule-2); border: 1px solid var(--rule-2); margin-top: clamp(28px, 3vw, 44px); }
@media (min-width: 720px) { .families { grid-template-columns: repeat(5, 1fr); } }
.families div { background: var(--card); padding: 14px 16px; }
.families .n { font: 510 10.5px/1 var(--font-mono); letter-spacing: 0.12em; color: var(--accent); display: block; margin-bottom: 7px; }
.families .t { font: 510 13px/1.35 var(--font-body); }

/* --- Full product table (no accordion) ------------------------------------ */
.ptable { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--rule-2); }
.ptable thead th { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--rule-2); background: var(--paper); font: 510 11px/1.5 var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); }
.ptable td, .ptable th[scope="row"] { padding: 14px; border-bottom: 1px solid var(--rule); vertical-align: top; text-align: left; }
.ptable tbody tr:last-child td, .ptable tbody tr:last-child th { border-bottom: 0; }
.ptable th[scope="row"] { font: 600 14.5px/1.35 var(--font-display); letter-spacing: -0.005em; width: 30%; }
.ptable th[scope="row"] .g { display: block; font: 510 10.5px/1 var(--font-mono); letter-spacing: 0.12em; color: var(--accent); margin-bottom: 6px; }
.ptable .form-col { width: 16%; font: 510 12px/1.5 var(--font-mono); letter-spacing: 0.06em; color: var(--ink-2); text-transform: uppercase; }
.ptable .codes { font: 510 13px/1.9 var(--font-mono); letter-spacing: 0.02em; }
@media (max-width: 760px) {
  .ptable, .ptable tbody, .ptable tr, .ptable td, .ptable th { display: block; width: 100% !important; }
  .ptable thead { display: none; }
  .ptable tbody tr { border-bottom: 1px solid var(--rule-2); padding-block: 6px; }
  .ptable td, .ptable th[scope="row"] { border-bottom: 0; padding-block: 6px; }
}

/* --- Application matrix (all industries at once) --------------------------- */
.matrix { display: grid; gap: 1px; background: var(--rule-2); border: 1px solid var(--rule-2); }
@media (min-width: 900px) { .matrix { grid-template-columns: repeat(2, 1fr); } }
.mcell { background: var(--card); padding: 0; display: flex; flex-direction: column; }
.mcell__img { aspect-ratio: 21 / 9; overflow: hidden; border-bottom: 1px solid var(--rule); }
.mcell__img img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.85) contrast(1.05); }
.mcell__body { padding: clamp(16px, 1.8vw, 22px); }
.mcell h3 { margin-bottom: 12px; }
.mcell dl { display: grid; gap: 0; }
.mcell dt { font: 510 10.5px/1.5 var(--font-mono); letter-spacing: 0.11em; text-transform: uppercase; color: var(--ink-2); padding-top: 11px; border-top: 1px solid var(--rule); }
.mcell dd { margin: 0 0 2px; font: 510 12.5px/1.75 var(--font-mono); letter-spacing: 0.02em; padding-bottom: 9px; }

/* --- Approvals ------------------------------------------------------------ */
.approvals { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.approvals span { border: 1px solid var(--rule-2); background: var(--card); padding: 9px 14px; font: 600 13px/1 var(--font-mono); letter-spacing: 0.1em; }
.callout { margin-top: clamp(26px, 3vw, 40px); border-left: 3px solid var(--accent); background: var(--card); padding: clamp(16px, 2vw, 22px); }
.callout strong { font-family: var(--font-display); display: block; margin-bottom: 5px; }
.callout p { color: var(--ink-2); font-size: 14.5px; max-width: 86ch; }

/* --- Enquiry -------------------------------------------------------------- */
.enquire { background: var(--card); }
.enquire__grid { display: grid; gap: clamp(26px, 3vw, 48px); }
@media (min-width: 980px) { .enquire__grid { grid-template-columns: 0.8fr 1.2fr; } }
.contactlist { display: grid; margin-top: 24px; }
.contactlist div { padding: 13px 0; border-top: 1px solid var(--rule); }
.contactlist dt { font: 510 10.5px/1.5 var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 3px; }
.contactlist dd { margin: 0; font-size: 15px; }
.contactlist a { text-decoration: none; border-bottom: 1px solid var(--rule-2); }
.contactlist a:hover { border-bottom-color: var(--accent); }

.form { display: grid; gap: 14px; }
.form__row { display: grid; gap: 14px; }
@media (min-width: 620px) { .form__row--2 { grid-template-columns: 1fr 1fr; } .form__row--3 { grid-template-columns: repeat(3, 1fr); } }
.field { display: grid; gap: 6px; }
.field label { font: 510 10.5px/1.5 var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); }
.field label .req { color: var(--accent); }
.field input, .field select, .field textarea { min-height: 46px; padding: 11px 13px; background: var(--paper); border: 1px solid var(--rule-2); font-size: 15px; width: 100%; transition: border-color .16s; }
.field textarea { min-height: 104px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: oklch(66% 0.02 283); }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field .err { font-size: 12px; color: var(--accent); display: none; }
.field.is-invalid input, .field.is-invalid select, .field.is-invalid textarea { border-color: var(--accent); background: oklch(44% 0.185 28 / 0.04); }
.field.is-invalid .err { display: block; }
.form__foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 4px; }
.form__hint { font-size: 12.5px; color: var(--ink-2); max-width: 44ch; }
.form__ok { display: none; gap: 10px; align-items: flex-start; padding: 15px; border: 1px solid var(--accent); background: oklch(44% 0.185 28 / 0.05); }
.form__ok.is-shown { display: flex; }
.form__ok svg { width: 18px; height: 18px; color: var(--accent); flex: none; margin-top: 2px; }
.form__ok p { font-size: 14.5px; }

/* --- Fine print + footer --------------------------------------------------- */
.fineprint { padding-block: clamp(26px, 3vw, 40px); border-top: 1px solid var(--rule); }
.fineprint p { font-size: 12px; line-height: 1.6; color: var(--ink-2); max-width: 110ch; }
.fineprint p + p { margin-top: 9px; }

.sitefoot { background: var(--ink); color: var(--paper); padding-block: clamp(40px, 4vw, 64px) 72px; }
.sitefoot__grid { display: grid; gap: clamp(24px, 3vw, 44px); }
@media (min-width: 900px) { .sitefoot__grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.sitefoot img { width: 118px; margin-bottom: 18px; filter: brightness(0) invert(1); opacity: .9; }
.sitefoot h4 { font: 600 12px/1 var(--font-display); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 15px; }
.sitefoot p { color: oklch(72% 0.02 285); font-size: 14.5px; max-width: 42ch; }
.sitefoot ul { list-style: none; padding: 0; display: grid; gap: 9px; }
.sitefoot ul a { font-size: 14px; color: oklch(72% 0.02 285); text-decoration: none; }
.sitefoot ul a:hover { color: var(--paper); }
.sitefoot__bar { margin-top: clamp(30px, 3vw, 48px); border-top: 1px solid rgb(255 255 255 / 0.12); padding-top: 18px; display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 12px; color: oklch(72% 0.02 285); }
.sitefoot__bar a { text-decoration: none; }
.sitefoot__bar .sep { margin-left: auto; display: flex; gap: 20px; flex-wrap: wrap; }

/* --- WhatsApp float -------------------------------------------------------- */
.wa-float { position: fixed; right: clamp(13px, 2vw, 24px); bottom: clamp(13px, 2vw, 24px); z-index: 70; display: inline-flex; align-items: center; gap: 9px; min-height: 50px; padding: 0 17px 0 15px; background: #1faa54; color: #fff; border-radius: 99px; text-decoration: none; font: 590 14px/1 var(--font-body); box-shadow: 0 8px 24px rgb(10 11 20 / 0.22); transition: all .16s; }
.wa-float:hover { background: #1b9a4c; transform: translateY(-2px); }
.wa-float svg { width: 21px; height: 21px; }
@media (max-width: 560px) { .wa-float span { display: none; } .wa-float { padding: 0; width: 52px; justify-content: center; } }

/* --- Behaviour hooks shared with js/audweld.js ----------------------------- */
.panel[hidden] { display: none; }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

@media print {
  .masthead, .utility, .wa-float, .form { display: none !important; }
  body { background: #fff; }
  .spechero { background-image: none; }
}