/* industrial-slip-testing.com  —  industrial palette */

:root {
  --bg: #0d0e10;
  --bg-2: #15171b;
  --steel: #2a2d33;
  --steel-2: #3a3e46;
  --line: #2a2d33;
  --line-2: #444853;
  --ink: #d8d9dc;
  --ink-2: #9a9da4;
  --paper: #f6f4ef;
  --paper-2: #ecebe5;
  --ink-d: #18191c;
  --ink-d2: #4d5057;
  --accent: #ffd400;
  --accent-2: #ffe24a;
  --warn: #ff5a3a;
  --shadow: 0 1px 0 rgba(0,0,0,0.04), 0 8px 28px -10px rgba(20,20,25,0.16);
  --radius: 2px;
  --maxw: 1280px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px; line-height: 1.55;
  color: var(--ink-d); background: var(--paper);
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* UTILITY BAR */
.utility-bar { background: var(--bg); color: var(--ink); font-size: 13px; letter-spacing: 0.01em; border-bottom: 1px solid var(--line); }
.utility-inner { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; gap: 16px; }
.utility-left { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.utility-left a { display: inline-flex; align-items: center; gap: 6px; color: var(--ink); font-weight: 500; }
.utility-left a:hover { color: var(--accent); }
.utility-left svg { width: 14px; height: 14px; }
.utility-right { display: flex; align-items: center; gap: 14px; }
.ukas-strip { font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); border-left: 2px solid var(--accent); padding-left: 10px; }

/* SITE HEADER */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(13,14,16,0.96); backdrop-filter: blur(8px) saturate(140%); -webkit-backdrop-filter: blur(8px) saturate(140%); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; gap: 24px; }
.logo { display: flex; align-items: center; gap: 12px; color: var(--paper); }
.logo-mark { width: 38px; height: 38px; display: grid; place-items: center; background: var(--accent); border-radius: var(--radius); flex-shrink: 0; box-shadow: 0 0 0 1px rgba(0,0,0,0.06), 0 8px 16px -8px rgba(255,212,0,0.25); }
.logo-mark svg { width: 24px; height: 24px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-text .a { font-family: 'Inter Tight', sans-serif; font-weight: 600; font-size: 17px; letter-spacing: -0.01em; color: var(--paper); }
.logo-text .a em { font-style: normal; color: var(--accent); }
.logo-text .b { font-family: 'JetBrains Mono', monospace; font-size: 10px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); margin-top: 2px; }

.primary ul { list-style: none; display: flex; align-items: center; gap: 4px; }
.primary a { display: inline-block; padding: 8px 14px; font-size: 14px; font-weight: 500; color: var(--ink); border-radius: var(--radius); transition: color 0.15s, background 0.15s; }
.primary a:hover { color: var(--accent); background: rgba(255,255,255,0.04); }
.primary .btn-quote { background: var(--accent); color: var(--bg); font-weight: 600; padding: 9px 16px; display: inline-flex; align-items: center; gap: 6px; }
.primary .btn-quote:hover { background: var(--accent-2); color: var(--bg); }

.mobile-toggle { display: none; background: transparent; border: 1px solid var(--line-2); border-radius: var(--radius); width: 40px; height: 40px; cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 4px; }
.mobile-toggle span { display: block; width: 18px; height: 2px; background: var(--paper); }

@media (max-width: 900px) {
  .primary { display: none; }
  .primary.open { display: block; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--line); }
  .primary.open ul { flex-direction: column; align-items: stretch; padding: 16px 24px; gap: 0; }
  .primary.open a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .mobile-toggle { display: flex; }
}

/* HERO */
.hero { background: var(--bg); color: var(--paper); padding: 72px 0 88px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px); background-size: 56px 56px; pointer-events: none; mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%); }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
@media (max-width: 920px) { .hero-inner { grid-template-columns: 1fr; gap: 48px; } }

.hero-breadcrumb { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500; letter-spacing: 0.05em; color: var(--ink-2); margin-bottom: 18px; }
.hero-breadcrumb a { color: var(--ink-2); }
.hero-breadcrumb a:hover { color: var(--accent); }
.hero-breadcrumb strong { color: var(--paper); font-weight: 600; }

.hero-eyebrow { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--line-2); border-left: 3px solid var(--accent); padding: 6px 12px 6px 10px; margin-bottom: 22px; }

.hero h1 { font-family: 'Inter Tight', sans-serif; font-weight: 600; font-size: clamp(38px, 5.4vw, 68px); line-height: 1.05; letter-spacing: -0.025em; color: var(--paper); margin-bottom: 24px; }
.hero h1 em { font-style: normal; color: var(--accent); position: relative; }
.hero h1 em::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0.06em; height: 0.12em; background: var(--accent); opacity: 0.18; }

.hero-lede { font-size: 19px; line-height: 1.55; color: var(--ink); margin-bottom: 30px; max-width: 600px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 40px; }

.btn-primary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; background: var(--accent); color: var(--bg); font-weight: 600; font-size: 15px; border: 1px solid var(--accent); border-radius: var(--radius); transition: transform 0.12s, background 0.12s; }
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); transform: translateY(-1px); }
.btn-ghost { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; background: transparent; color: var(--paper); font-weight: 500; font-size: 15px; border: 1px solid var(--line-2); border-radius: var(--radius); transition: border-color 0.12s, color 0.12s; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-trust { display: flex; gap: 36px; padding-top: 28px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.hero-trust-item { display: flex; flex-direction: column; gap: 4px; }
.hero-trust-num { font-family: 'Inter Tight', sans-serif; font-weight: 700; font-size: 32px; letter-spacing: -0.02em; color: var(--paper); line-height: 1; }
.hero-trust-num .unit { font-size: 18px; color: var(--accent); }
.hero-trust-label { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }

/* HERO CARD */
.hero-card { background: var(--steel); border: 1px solid var(--line-2); border-radius: var(--radius); padding: 28px; position: relative; box-shadow: 0 24px 48px -16px rgba(0,0,0,0.6); }
.hero-card::before { content: ''; position: absolute; top: 0; right: 0; width: 56px; height: 4px; background: var(--accent); }
.hero-card-head { display: flex; align-items: center; gap: 16px; padding-bottom: 22px; margin-bottom: 22px; border-bottom: 1px solid var(--line-2); }
.hero-card-head h3 { font-size: 16px; font-weight: 600; color: var(--paper); margin: 0; }
.hero-card-head p { font-size: 12px; color: var(--ink-2); margin: 2px 0 0 0; font-family: 'JetBrains Mono', monospace; letter-spacing: 0.05em; }
.hero-card-list { list-style: none; }
.hero-card-list li { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line-2); font-size: 13px; }
.hero-card-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.hero-card-list li::before { content: ''; width: 14px; height: 14px; flex-shrink: 0; margin-top: 2px; background: var(--accent); clip-path: polygon(0 0, 100% 50%, 0 100%, 25% 50%); }
.hero-card-list strong { display: block; font-weight: 600; color: var(--paper); font-size: 13px; margin-bottom: 2px; }
.hero-card-list span { display: block; color: var(--ink-2); font-size: 12px; line-height: 1.45; }

/* PENDULUM ANIMATION */
.pendulum-svg { width: 100%; height: auto; max-width: 380px; margin: 0 auto; display: block; }
.pendulum-arm { transform-origin: 200px 50px; animation: pendulum-swing 2.4s ease-in-out infinite; }
@keyframes pendulum-swing {
  0%, 100% { transform: rotate(-50deg); }
  50% { transform: rotate(50deg); }
}
.pendulum-trail { stroke-dasharray: 4 6; animation: pendulum-trail-fade 2.4s linear infinite; }
@keyframes pendulum-trail-fade {
  0%, 100% { opacity: 0.15; }
  50% { opacity: 0.45; }
}
.ptv-readout-num { font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 36px; fill: var(--accent); animation: ptv-flicker 3s ease-in-out infinite; }
@keyframes ptv-flicker {
  0%, 18%, 22%, 100% { opacity: 1; }
  20% { opacity: 0.4; }
  60% { opacity: 1; }
  62% { opacity: 0.4; }
  64% { opacity: 1; }
}

/* HAZARD STRIPE */
.hazard-stripe { height: 8px; background: repeating-linear-gradient(-45deg, var(--accent) 0, var(--accent) 18px, var(--bg) 18px, var(--bg) 36px); }

/* SECTIONS */
.section-pad { padding: 88px 0; }
.section-pad-sm { padding: 56px 0; }
.section-dark { background: var(--bg); color: var(--paper); }
.section-dark .section-eyebrow { color: var(--accent); }
.section-dark h2 { color: var(--paper); }
.section-dark p { color: var(--ink); }

.section-eyebrow { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-d2); border-left: 3px solid var(--accent); padding-left: 10px; margin-bottom: 18px; }

.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head h2 { font-family: 'Inter Tight', sans-serif; font-weight: 600; font-size: clamp(28px, 3.4vw, 44px); letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 16px; color: var(--ink-d); }
.section-head h2 em { font-style: normal; color: var(--ink-d); position: relative; padding: 0 4px; }
.section-head h2 em::before { content: ''; position: absolute; inset: 0.05em -0.05em -0.05em -0.05em; background: var(--accent); z-index: -1; opacity: 0.85; }
.section-head p { font-size: 17px; line-height: 1.6; color: var(--ink-d2); }

/* SURFACES LIST */
.surfaces-section { background: var(--paper-2); }
.surfaces-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 0; border-top: 1px solid var(--line-2); }
.surfaces-list li { padding: 32px 28px 32px 0; border-bottom: 1px solid var(--line-2); border-right: 1px solid var(--line-2); position: relative; }
.surfaces-list li:nth-child(3n) { border-right: 0; }
@media (max-width: 800px) { .surfaces-list li { border-right: 0; } }
.surface-num { display: inline-block; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 700; letter-spacing: 0.08em; color: var(--ink-d2); margin-bottom: 14px; padding-left: 28px; }
.surfaces-list p { padding-left: 28px; font-size: 15px; line-height: 1.55; color: var(--ink-d); }
.surfaces-list strong { display: block; font-weight: 600; color: var(--ink-d); margin-bottom: 4px; }

/* RISK CARDS */
.risk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); }
.risk-card { background: var(--paper); padding: 28px 24px; position: relative; transition: background 0.2s; }
.risk-card:hover { background: var(--paper-2); }
.risk-card::before { content: '!'; position: absolute; top: 24px; right: 24px; width: 22px; height: 22px; background: var(--accent); color: var(--bg); font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 13px; display: grid; place-items: center; border-radius: 2px; }
.risk-card h3 { font-size: 17px; font-weight: 600; color: var(--ink-d); margin: 0 0 10px 0; padding-right: 36px; letter-spacing: -0.005em; }
.risk-card p { font-size: 14px; line-height: 1.55; color: var(--ink-d2); }

/* ADJ CARDS */
.adj-section { background: var(--paper); }
.adj-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.adj-card { display: flex; flex-direction: column; gap: 4px; padding: 22px; background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius); position: relative; transition: transform 0.12s, border-color 0.12s, background 0.12s; }
.adj-card:hover { border-color: var(--accent); background: var(--paper); transform: translateY(-2px); }
.adj-label { font-family: 'JetBrains Mono', monospace; font-size: 10px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-d2); }
.adj-name { font-family: 'Inter Tight', sans-serif; font-size: 17px; font-weight: 600; color: var(--ink-d); letter-spacing: -0.005em; }
.adj-code { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--ink-d2); letter-spacing: 0.04em; margin-top: 2px; }
.adj-arrow { position: absolute; top: 22px; right: 22px; color: var(--ink-d2); font-size: 18px; transition: color 0.12s, transform 0.12s; }
.adj-card:hover .adj-arrow { color: var(--accent); transform: translateX(2px); }
.adj-card.dark { background: var(--steel); border-color: var(--line-2); color: var(--paper); }
.adj-card.dark .adj-name { color: var(--paper); }
.adj-card.dark .adj-label, .adj-card.dark .adj-code { color: var(--ink-2); }
.adj-card.dark:hover { background: var(--steel-2); border-color: var(--accent); }

/* META STRIP */
.meta-strip { background: var(--bg); color: var(--paper); padding: 32px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.meta-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; }
.meta-item { display: flex; flex-direction: column; gap: 4px; border-left: 2px solid var(--accent); padding-left: 16px; }
.meta-label { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.meta-value { font-family: 'Inter Tight', sans-serif; font-size: 18px; font-weight: 600; color: var(--paper); letter-spacing: -0.01em; }
.meta-value.code { font-family: 'JetBrains Mono', monospace; font-size: 22px; color: var(--accent); letter-spacing: 0.04em; }

/* ENQUIRY */
.enquiry-section { background: var(--bg); color: var(--paper); position: relative; }
.enquiry-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent); }
.enquiry-section .section-eyebrow { color: var(--accent); border-left-color: var(--accent); }
.enquiry-section h2 { font-family: 'Inter Tight', sans-serif; font-weight: 600; font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -0.02em; color: var(--paper); margin-bottom: 16px; line-height: 1.1; }
.enquiry-section h2 em { font-style: normal; color: var(--accent); }
.enquiry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
@media (max-width: 900px) { .enquiry-grid { grid-template-columns: 1fr; gap: 40px; } }
.enquiry-aside p { font-size: 16px; line-height: 1.65; color: var(--ink); margin-bottom: 32px; }
.enquiry-contact { margin-bottom: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.enquiry-contact h4 { font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 10px; }
.enquiry-contact a { display: block; color: var(--paper); font-size: 17px; font-weight: 500; margin-bottom: 6px; border-bottom: 1px solid transparent; transition: border-color 0.12s, color 0.12s; }
.enquiry-contact a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.enquiry-contact p { font-size: 14px; color: var(--ink); line-height: 1.55; }
.enquiry-iframe-wrap { background: var(--paper); border-radius: var(--radius); padding: 8px; position: relative; box-shadow: 0 24px 48px -16px rgba(0,0,0,0.6); }
.enquiry-iframe-wrap::before { content: ''; position: absolute; top: -8px; right: -8px; bottom: -8px; left: -8px; border: 1px solid var(--accent); pointer-events: none; border-radius: var(--radius); }
.enquiry-iframe-wrap iframe { width: 100%; height: 700px; border: 0; background: var(--paper); border-radius: var(--radius); }

/* FOOTER */
footer { background: var(--bg); color: var(--ink); padding: 64px 0 28px; border-top: 4px solid var(--accent); }
.footer-grid { display: grid; grid-template-columns: 2.2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 56px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; } }
.footer-brand p { font-size: 14px; line-height: 1.6; margin-top: 16px; color: var(--ink-2); max-width: 360px; }
footer h5 { font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
footer ul a { font-size: 14px; color: var(--ink); transition: color 0.12s; }
footer ul a:hover { color: var(--accent); }
.footer-bottom { padding-top: 28px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; font-size: 12px; color: var(--ink-2); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.04em; }
.footer-bottom em { color: var(--accent); font-style: normal; }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1); }
.reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}