/* ============================================================
   RIEWA HEITECHNIEK — shared stylesheet
   Derived strictly from the RIEWA Brand Guideline v1.0
   ============================================================ */

:root {
  --black:      #060606;
  --panel:      #0E0F11;
  --panel-2:    #0B0C0E;
  --orange:     #F58220;
  --orange-hi:  #FF9A3D;
  --steel:      #C9CED4;
  --head:       #E8EAEC;
  --text:       #A7ADB4;
  --mono:       #7C828A;
  --mono-lt:    #8A9098;
  --line:       rgba(255,255,255,0.08);
  --line-2:     rgba(255,255,255,0.14);
  --shadow-deep: 0 40px 80px rgba(0,0,0,0.6);

  --f-display: 'Barlow Condensed', sans-serif;
  --f-body:    'Barlow', sans-serif;
  --f-mono:    'IBM Plex Mono', monospace;

  --pad-x: 72px;
  --maxw: 1320px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--black);
}

body {
  color: var(--head);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

::selection { background: var(--orange); color: var(--black); }

a { color: inherit; }

img { max-width: 100%; }

/* film grain overlay for depth ------------------------------ */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
}

/* ============================================================
   TYPOGRAPHY HELPERS
   ============================================================ */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.eyebrow .tick {
  width: 34px; height: 2px; background: var(--orange); flex: none;
}
.eyebrow .label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--mono-lt);
  text-transform: uppercase;
}

.section-index {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--orange);
  margin-bottom: 16px;
}

h1, h2, h3 { margin: 0; }

.display {
  font-family: var(--f-display);
  font-weight: 800;
  text-transform: uppercase;
  color: var(--head);
  letter-spacing: 0.005em;
}

.accent { color: var(--orange); }

/* ============================================================
   LAYOUT
   ============================================================ */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }

section { position: relative; }

.section-pad { padding: 140px var(--pad-x); }
.section-line { border-top: 1px solid var(--line); }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 48px;
  background: linear-gradient(to bottom, rgba(6,6,6,0.94), rgba(6,6,6,0.55) 70%, transparent);
  backdrop-filter: blur(8px);
  transition: padding 0.3s ease, background 0.3s ease;
}
.nav.scrolled {
  padding: 11px 48px;
  background: rgba(6,6,6,0.9);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
}
.brand .word {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 26px;
  letter-spacing: 0.06em;
  color: var(--steel);
  line-height: 1;
}
.brand .sub {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mono);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  position: relative;
  color: #B9BEC4;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 10px 16px;
  transition: color 0.25s ease;
}
.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 1px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22,1,0.36,1);
}
.nav-links a:not(.nav-cta):hover,
.nav-links a.active { color: var(--head); }
.nav-links a:not(.nav-cta):hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-cta {
  color: var(--black) !important;
  background: var(--orange);
  padding: 10px 22px !important;
  margin-left: 12px;
  transition: background 0.25s ease, transform 0.25s ease;
}
.nav-cta:hover { background: var(--orange-hi); transform: translateY(-1px); }
.nav a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

/* scroll progress heirail (top) */
.heirail {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--orange), var(--orange-hi));
  z-index: 90;
  box-shadow: 0 0 12px rgba(245,130,32,0.6);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.06em;
  padding: 16px 32px;
  cursor: pointer;
  border: none;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.btn-primary {
  background: var(--orange);
  color: var(--black);
}
.btn-primary:hover {
  background: var(--orange-hi);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(245,130,32,0.22);
}
.btn-primary .arw { transition: transform 0.25s ease; }
.btn-primary:hover .arw { transform: translateX(4px); }
.btn-ghost {
  color: var(--steel);
  padding: 16px 12px;
  border-bottom: 1px solid #3A3E43;
  background: none;
}
.btn-ghost:hover { color: var(--orange); border-bottom-color: var(--orange); }
.btn-active:active { transform: translateY(0); }

/* ============================================================
   ANIMATION KEYFRAMES
   ============================================================ */
@keyframes riewaFadeUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
@keyframes riewaCue    { 0%,100% { transform: translateY(0); opacity: 0.9; } 50% { transform: translateY(10px); opacity: 0.35; } }
@keyframes riewaBeacon { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }
@keyframes riewaBlink  { 0%,100% { opacity: 0.15; } 50% { opacity: 1; } }
@keyframes riewaSpin   { from { transform: rotate(0); } to { transform: rotate(360deg); } }
@keyframes riewaRing   { 0% { transform: translate(-50%,-50%) scale(0.4); opacity: 0.9; } 100% { transform: translate(-50%,-50%) scale(2.6); opacity: 0; } }

/* scroll-reveal (IntersectionObserver toggles .in) */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }

/* ============================================================
   SECTOR PAGES (woningbouw / utiliteitsbouw / infra)
   ============================================================ */
.secpage-hero { padding: 168px var(--pad-x) 80px; position: relative; overflow: hidden; }
.secpage-hero::before { content:""; position:absolute; right:-8%; top:-10%; width:55%; height:130%; background:radial-gradient(50% 50% at 50% 50%, rgba(245,130,32,0.08), transparent 70%); pointer-events:none; }
.secpage-inner { display:grid; grid-template-columns:1.05fr 0.95fr; gap:56px; align-items:center; }
.secpage-hero h1 { font-family:var(--f-display); font-weight:800; font-size:clamp(56px,7vw,116px); line-height:0.92; text-transform:uppercase; color:var(--head); margin:0 0 24px; }
.secpage-hero .lead { font-size:19px; line-height:1.6; color:var(--text); max-width:50ch; margin:0 0 36px; text-wrap:pretty; }
.secpage-actions { display:flex; gap:22px; align-items:center; flex-wrap:wrap; }

.secpage-figure { border:1px solid var(--line); background:var(--panel-2); box-shadow:var(--shadow-deep); animation:riewaFadeUp 0.9s ease-out 0.15s both; }
.secpage-figure .bar { display:flex; justify-content:space-between; align-items:center; padding:12px 16px; border-bottom:1px solid var(--line); font-family:var(--f-mono); font-size:11px; letter-spacing:0.24em; color:var(--mono-lt); }
.secpage-figure .bar .live { display:flex; align-items:center; gap:8px; color:var(--orange); }
.secpage-figure .bar .live .d { width:6px; height:6px; background:var(--orange); animation:riewaBeacon 1.6s ease-in-out infinite; }
.secpage-figure .anim { height:280px; }
.secpage-figure .scene-infra { transform:translateY(46px); }

.secpage-points { display:grid; grid-template-columns:repeat(2,1fr); border:1px solid var(--line); margin-top:8px; }
.spoint { padding:38px 36px; border-right:1px solid var(--line); border-bottom:1px solid var(--line); transition:background 0.3s; }
.spoint:nth-child(2n) { border-right:0; }
.spoint:nth-last-child(-n+2) { border-bottom:0; }
.spoint:hover { background:rgba(245,130,32,0.04); }
.spoint .k { font-family:var(--f-mono); font-size:11px; letter-spacing:0.3em; color:var(--orange); margin-bottom:18px; }
.spoint h3 { font-family:var(--f-display); font-weight:700; font-size:28px; text-transform:uppercase; color:var(--head); margin:0 0 12px; line-height:1.05; }
.spoint p { margin:0; font-size:15px; line-height:1.7; color:var(--text); }

.secpage-uses { display:flex; flex-wrap:wrap; gap:14px; margin-top:36px; }
.use-chip { border:1px solid var(--line-2); padding:12px 20px; font-family:var(--f-mono); font-size:12px; letter-spacing:0.14em; color:var(--steel); transition:border-color 0.25s, color 0.25s; }
.use-chip:hover { border-color:var(--orange); color:var(--head); }

.sector-nav { display:grid; grid-template-columns:repeat(3,1fr); border:1px solid var(--line); margin-top:8px; }
.sector-nav a { display:flex; align-items:baseline; gap:14px; padding:30px 32px; text-decoration:none; border-right:1px solid var(--line); transition:background 0.3s; }
.sector-nav a:last-child { border-right:0; }
.sector-nav a:hover { background:rgba(245,130,32,0.05); }
.sector-nav a.current { background:rgba(245,130,32,0.06); }
.sector-nav a .n { font-family:var(--f-mono); font-size:12px; color:var(--orange); }
.sector-nav a .t { font-family:var(--f-display); font-weight:700; font-size:24px; text-transform:uppercase; color:var(--head); }
.sector-nav a.current .t { color:var(--orange); }

@media (max-width: 960px) {
  .secpage-inner { grid-template-columns:1fr; gap:36px; }
  .secpage-points { grid-template-columns:1fr; }
  .spoint { border-right:0; }
  .spoint:nth-last-child(-n+2) { border-bottom:1px solid var(--line); }
  .spoint:last-child { border-bottom:0; }
  .sector-nav { grid-template-columns:1fr; }
  .sector-nav a { border-right:0; border-bottom:1px solid var(--line); }
  .sector-nav a:last-child { border-bottom:0; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--line);
  padding: 0 var(--pad-x);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 72px 0 40px;
}
.footer h4 {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mono);
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 500;
}
.footer .word {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 30px;
  letter-spacing: 0.06em;
  color: var(--steel);
}
.footer .word .sub {
  font-family: var(--f-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mono);
  margin-left: 6px;
}
.footer p { color: var(--text); font-size: 15px; margin: 16px 0 0; max-width: 34ch; }
.footer a { color: var(--text); text-decoration: none; font-size: 15px; transition: color 0.2s; display: block; margin-bottom: 10px; }
.footer a:hover { color: var(--orange); }
.footer-base {
  max-width: var(--maxw);
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mono);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  :root { --pad-x: 24px; }
  .section-pad { padding: 96px var(--pad-x); }
  .nav { padding: 14px 22px; }
  .nav-links { gap: 0; }
  .nav-links a { padding: 8px 10px; font-size: 11px; letter-spacing: 0.08em; }
  .nav-links a.hide-sm { display: none; }
  .nav-cta { padding: 9px 16px !important; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 560px) {
  .nav { padding: 12px 18px; }
  .brand .sub { display: none; }
  .nav-links a[href*="#machine"] { display: none; }
  .nav-links a { padding: 8px 8px; }
  .nav-cta { margin-left: 6px; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}