/* ============================================================
   RDDC — Research, Design & Development Climate
   LIGHT theme · refined grotesk · accent used sparingly
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Onest:wght@300;400;500;600;700&display=swap');

:root {
  /* surfaces */
  --bg:        #f5f4f0;   /* warm paper */
  --bg-1:      #ffffff;   /* cards / clean sections */
  --bg-2:      #efeee8;   /* subtle panel */
  --bg-3:      #eae8e1;

  /* ink */
  --ink:       #16181a;
  --text:      #1c1f22;
  --text-2:    #5d6368;
  --text-3:    #9a9ea2;

  /* lines */
  --line:      rgba(22,24,26,.10);
  --line-2:    rgba(22,24,26,.16);

  /* accent — teal-cyan, tuned for light bg, used sparingly */
  --accent:    #0c8a97;
  --accent-2:  #0a737e;
  --accent-dim:rgba(12,138,151,.09);
  --accent-ln: rgba(12,138,151,.32);

  --maxw: 1300px;
  --pad: clamp(20px, 5vw, 60px);
  --font: 'Onest', system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, monospace;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: #fff; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }

/* ---------- Typography ---------- */
.eyebrow {
  font-size: 12.5px; font-weight: 600; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--accent-ln); }
.eyebrow.no-line::before { display: none; }

h1, h2, h3 { font-weight: 600; line-height: 1.08; letter-spacing: -.02em; text-wrap: balance; }

.display {
  font-size: clamp(36px, 5vw, 78px);
  font-weight: 600; line-height: 1.05; letter-spacing: -.028em;
}
.h-sec {
  font-size: clamp(27px, 3.2vw, 48px);
  font-weight: 600; letter-spacing: -.025em; line-height: 1.1;
}
.lead { font-size: clamp(17px, 1.35vw, 20px); color: var(--text-2); line-height: 1.6; max-width: 60ch; text-wrap: pretty; }
.muted { color: var(--text-2); }
.dim { color: var(--text-3); }

section { position: relative; }
.sec { padding-block: clamp(64px, 8.5vw, 132px); }
.sec-head { display: flex; flex-direction: column; gap: 20px; margin-bottom: clamp(40px, 5vw, 72px); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 11px;
  padding: 15px 26px; border-radius: 3px;
  font-weight: 500; font-size: 15.5px;
  border: 1px solid transparent;
  transition: all .35s var(--ease); white-space: nowrap;
}
.btn .arr { transition: transform .35s var(--ease); }
.btn:hover .arr { transform: translateX(5px); }
.btn-accent { background: var(--ink); color: #fff; }
.btn-accent:hover { background: var(--accent); }
.btn-ghost { border-color: var(--line-2); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(245,244,240,.82);
  backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 78px; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad);
}
.brand { display: flex; align-items: baseline; gap: 11px; }
.brand .mark { font-weight: 700; font-size: 23px; letter-spacing: -.04em; color: var(--ink); }
.brand .mark .dot { color: var(--accent); }
.brand .tag { font-size: 10px; letter-spacing: .13em; text-transform: uppercase; color: var(--text-3); font-weight: 600; }
@media (max-width: 700px){ .brand .tag { display: none; } }

.nav { display: flex; align-items: center; gap: 32px; }
.nav a.lnk { font-size: 14.5px; font-weight: 500; color: var(--text-2); position: relative; padding: 6px 0; transition: color .3s var(--ease); }
.nav a.lnk::after { content:""; position:absolute; left:0; bottom:0; height:1px; width:0; background: var(--accent); transition: width .35s var(--ease); }
.nav a.lnk:hover, .nav a.lnk.active { color: var(--ink); }
.nav a.lnk:hover::after, .nav a.lnk.active::after { width:100%; }

.header-cta { display: flex; align-items: center; gap: 16px; }
.burger { display: none; width: 42px; height: 42px; border: 1px solid var(--line-2); background: transparent; border-radius: 3px; position: relative; }
.burger span { position:absolute; left:11px; right:11px; height:1.5px; background: var(--ink); transition: .3s var(--ease); }
.burger span:nth-child(1){ top:15px; } .burger span:nth-child(2){ top:20.5px; } .burger span:nth-child(3){ top:26px; }
body.menu-open .burger span:nth-child(1){ top:20.5px; transform: rotate(45deg); }
body.menu-open .burger span:nth-child(2){ opacity:0; }
body.menu-open .burger span:nth-child(3){ top:20.5px; transform: rotate(-45deg); }
@media (max-width: 980px){ .nav, .header-cta .btn { display: none; } .burger { display: block; } }

.mobile-menu {
  position: fixed; inset: 0; z-index: 99; background: var(--bg);
  padding: 104px var(--pad) 44px; display: flex; flex-direction: column; gap: 2px;
  transform: translateY(-100%); transition: transform .5s var(--ease), visibility .5s;
  pointer-events: none; visibility: hidden; overflow-y: auto;
}
body.menu-open .mobile-menu { transform: translateY(0); pointer-events: auto; visibility: visible; }
.mobile-menu a { font-size: 28px; font-weight: 600; letter-spacing: -.02em; padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.mobile-menu .mm-foot { margin-top: auto; padding-top: 28px; color: var(--text-3); font-size: 14px; line-height: 1.7; }

/* ---------- Image placeholder ---------- */
.ph {
  position: relative; overflow: hidden; background: var(--bg-2);
  background-image: repeating-linear-gradient(135deg,
     rgba(22,24,26,.035) 0, rgba(22,24,26,.035) 1px, transparent 1px, transparent 11px);
  display: flex; align-items: center; justify-content: center; border: 1px solid var(--line);
}
.ph::after {
  content: attr(data-label);
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  color: var(--text-3); text-transform: uppercase; padding: 6px 11px;
  border: 1px dashed var(--line-2); border-radius: 3px; background: rgba(255,255,255,.5);
}

/* ---------- Hero (split, light) ---------- */
.hero { padding-top: 132px; padding-bottom: clamp(48px, 6vw, 96px); }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: clamp(36px, 5vw, 80px); align-items: center; }
@media (max-width: 940px){ .hero-grid { grid-template-columns: 1fr; gap: 40px; } }
.hero h1 { margin: 22px 0 0; max-width: 15ch; }
.hero .lead { margin-top: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-media .ph { aspect-ratio: 4/5; height: 100%; min-height: 420px; }
@media (max-width: 940px){ .hero-media .ph { aspect-ratio: 16/10; min-height: 0; } }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.hero-tags span { font-size: 13px; color: var(--text-2); border: 1px solid var(--line-2); padding: 7px 14px; border-radius: 100px; }

/* ---------- Metrics ---------- */
.metrics { background: var(--bg-1); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.metrics-grid { display:grid; grid-template-columns: repeat(3, 1fr); max-width: var(--maxw); margin: 0 auto; }
.metric { padding: clamp(36px,4.5vw,64px) clamp(22px,3vw,48px); border-right: 1px solid var(--line); }
.metric:first-child { padding-left: var(--pad); }
.metric:last-child { border-right: none; }
.metric .num { font-size: clamp(46px, 6vw, 82px); font-weight: 600; letter-spacing: -.035em; line-height: .95; color: var(--ink); }
.metric .num .u { color: var(--accent); font-size: .42em; vertical-align: top; margin-left: 5px; font-weight: 600; }
.metric .lbl { color: var(--text-2); margin-top: 16px; font-size: 15.5px; max-width: 24ch; }
@media (max-width: 820px){ .metrics-grid { grid-template-columns: 1fr; } .metric{ border-right:none; border-bottom:1px solid var(--line); padding-inline: var(--pad);} .metric:last-child{border-bottom:none;} }

/* ---------- Split / about ---------- */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(36px,5vw,88px); align-items: center; }
@media (max-width: 900px){ .split { grid-template-columns: 1fr; } }
.split .ph { aspect-ratio: 4/5; }
.about-points { list-style:none; margin-top: 34px; display:flex; flex-direction:column; }
.about-points li { display:flex; gap:18px; padding: 18px 0; border-top:1px solid var(--line); }
.about-points li:last-child{ border-bottom:1px solid var(--line); }
.about-points .k { font-family: var(--mono); color: var(--accent); font-size:13px; min-width: 30px; padding-top: 3px; }
.about-points .v { color: var(--text-2); }
.about-points .v b { color: var(--ink); font-weight:600; }

/* ---------- Services list ---------- */
.svc-list { border-top: 1px solid var(--line-2); }
.svc {
  display:grid; grid-template-columns: 70px 1fr minmax(260px, .9fr) 56px;
  gap: 28px; align-items: center;
  padding: clamp(26px,3.4vw,44px) 0; border-bottom: 1px solid var(--line);
  transition: padding-left .4s var(--ease);
}
.svc .idx { font-family: var(--mono); font-size: 14px; color: var(--text-3); }
.svc .t { font-size: clamp(22px,2.5vw,36px); font-weight:600; letter-spacing:-.02em; transition: color .3s var(--ease); color: var(--ink); }
.svc .d { color: var(--text-2); font-size: 15.5px; line-height:1.5; }
.svc .go { width: 52px; height:52px; border:1px solid var(--line-2); border-radius:50%; display:flex; align-items:center; justify-content:center; justify-self:end; transition: all .4s var(--ease); color: var(--text-2); }
.svc:hover { padding-left: 16px; }
.svc:hover .t, .svc:hover .idx { color: var(--accent); }
.svc:hover .go { background: var(--ink); border-color: var(--ink); color:#fff; transform: rotate(-45deg); }
@media (max-width: 900px){
  .svc { grid-template-columns: 40px 1fr 44px; row-gap: 12px; }
  .svc .d { grid-column: 2 / 4; }
  .svc .go { width:44px; height:44px; }
}

/* ---------- Directions cards ---------- */
.dir-grid { display:grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line); border:1px solid var(--line); }
@media (max-width: 1000px){ .dir-grid{ grid-template-columns: repeat(2,1fr);} }
@media (max-width: 560px){ .dir-grid{ grid-template-columns: 1fr;} }
.dir { background: var(--bg-1); padding: clamp(24px,2.6vw,34px); display:flex; flex-direction:column; min-height: 340px; transition: background .4s var(--ease); }
.dir:hover { background: var(--bg-2); }
.dir .dir-ph { aspect-ratio: 16/10; margin-bottom: 24px; }
.dir .dnum { font-family: var(--mono); font-size:12.5px; color: var(--accent); letter-spacing:.1em; }
.dir h3 { font-size: 21px; margin: 12px 0 10px; letter-spacing:-.02em; color: var(--ink); }
.dir p { color: var(--text-2); font-size: 14.5px; line-height:1.55; margin-top:auto; }

/* ---------- Process steps ---------- */
.steps { display:grid; grid-template-columns: repeat(5,1fr); gap: 1px; background: var(--line); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
@media (max-width: 1000px){ .steps{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .steps{ grid-template-columns: 1fr; } }
.step { background: var(--bg); padding: clamp(26px,2.8vw,38px) clamp(18px,2vw,28px); transition: background .4s var(--ease); }
.step:hover { background: var(--bg-1); }
.step .sn { font-size: clamp(34px,3.4vw,52px); font-weight:600; letter-spacing:-.03em; color: var(--bg-3); transition: color .4s var(--ease); }
.step:hover .sn { color: var(--accent); }
.step h3 { font-size: 18px; margin: 18px 0 10px; letter-spacing:-.01em; color: var(--ink); }
.step p { color: var(--text-2); font-size: 14px; line-height:1.5; }

/* ---------- CTA strip ---------- */
.cta-strip { background: var(--ink); }
.cta-strip .wrap { display:flex; align-items:center; justify-content:space-between; gap: 40px; padding-block: clamp(52px,6vw,96px); flex-wrap: wrap; }
.cta-strip h2 { font-size: clamp(26px,3.4vw,50px); font-weight:600; letter-spacing:-.025em; max-width: 18ch; color: #fff; }
.cta-strip .btn-accent { background: #fff; color: var(--ink); }
.cta-strip .btn-accent:hover { background: var(--accent); color: #fff; }

/* ---------- Contact ---------- */
.contact-grid { display:grid; grid-template-columns: .82fr 1.18fr; gap: clamp(36px,5vw,84px); }
@media (max-width: 900px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-info .ci-item { padding: 24px 0; border-top:1px solid var(--line); }
.contact-info .ci-item:first-of-type { border-top:none; }
.contact-info .ci-k { font-size:12.5px; letter-spacing:.13em; text-transform:uppercase; color: var(--text-3); margin-bottom: 9px; }
.contact-info .ci-v { font-size: clamp(19px,2vw,26px); font-weight:600; letter-spacing:-.02em; color: var(--ink); }
.contact-info .ci-v a:hover { color: var(--accent); }

.form { display:grid; gap: 20px; }
.field { display:flex; flex-direction:column; gap:9px; }
.field label { font-size:12.5px; letter-spacing:.09em; text-transform:uppercase; color: var(--text-3); }
.field input, .field textarea {
  background: var(--bg-1); border:1px solid var(--line-2); border-radius:3px;
  color: var(--text); font-family:inherit; font-size:15.5px; padding:15px 17px;
  transition: border-color .3s var(--ease), box-shadow .3s;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.field input:focus, .field textarea:focus { outline:none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.field textarea { resize: vertical; min-height: 118px; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
@media (max-width:560px){ .form-row{ grid-template-columns:1fr; } }
.form-foot { display:flex; align-items:center; gap:18px; flex-wrap:wrap; margin-top:4px; }
.form-note { font-size:12.5px; color: var(--text-3); max-width: 40ch; }
.form-success { padding: 22px; border:1px solid var(--accent-ln); background: var(--accent-dim); border-radius:3px; color: var(--ink); display:none; }
.form-success.show { display:block; }

/* ---------- Footer ---------- */
.footer { border-top:1px solid var(--line); padding-block: clamp(52px,5.5vw,84px); background: var(--bg-1); }
.footer-top { display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 44px; padding-bottom: 52px; border-bottom:1px solid var(--line); }
@media (max-width: 820px){ .footer-top{ grid-template-columns:1fr; gap:36px; } }
.footer .f-mark { font-weight:700; font-size:34px; letter-spacing:-.04em; color: var(--ink); }
.footer .f-mark .dot{ color: var(--accent); }
.footer .f-slogan { color: var(--text-2); margin-top:16px; max-width: 32ch; }
.fcol h4 { font-size:12.5px; letter-spacing:.13em; text-transform:uppercase; color: var(--text-3); margin-bottom:18px; font-weight:600; }
.fcol a, .fcol p { display:block; color: var(--text-2); padding:6px 0; font-size:15px; transition: color .3s; }
.fcol a:hover { color: var(--accent); }
.footer-bottom { padding-top: 30px; display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap; color: var(--text-3); font-size: 13px; line-height:1.7; }
.footer-bottom .req { max-width: 70ch; }

/* ---------- Page hero (subpages) ---------- */
.page-hero { padding-top: 150px; padding-bottom: clamp(36px,4.5vw,72px); border-bottom:1px solid var(--line); }
.page-hero h1 { font-size: clamp(36px,5.2vw,82px); font-weight:600; letter-spacing:-.03em; margin-top:18px; }
.page-hero .lead { margin-top: 24px; }
.crumbs { font-family: var(--mono); font-size:12.5px; color: var(--text-3); letter-spacing:.04em; }
.crumbs a:hover{ color: var(--accent); }
.crumbs .sep { color: var(--line-2); margin:0 8px; }

/* ---------- Projects grid ---------- */
.proj-grid { display:grid; grid-template-columns: repeat(2,1fr); gap: clamp(20px,2.5vw,40px); }
@media (max-width: 760px){ .proj-grid{ grid-template-columns:1fr; } }
.proj .proj-ph { aspect-ratio: 16/11; transition: transform .6s var(--ease); }
.proj .pwrap { overflow:hidden; border:1px solid var(--line); }
.proj:hover .proj-ph { transform: scale(1.04); }
.proj .meta { display:flex; align-items:flex-start; justify-content:space-between; gap:20px; padding-top:20px; }
.proj .meta h3 { font-size: clamp(20px,2.1vw,28px); font-weight:600; letter-spacing:-.02em; transition: color .3s; color: var(--ink); }
.proj:hover .meta h3 { color: var(--accent); }
.proj .meta .cat { font-family:var(--mono); font-size:12.5px; color: var(--text-3); white-space:nowrap; padding-top: 6px; }
.proj .tags { display:flex; gap:8px; flex-wrap:wrap; margin-top:13px; }
.proj .tags span { font-size:12.5px; color: var(--text-2); border:1px solid var(--line-2); padding:5px 12px; border-radius:100px; }

.proj-filter { display:flex; gap:9px; flex-wrap:wrap; margin-bottom: 44px; }
.proj-filter button { background:transparent; border:1px solid var(--line-2); color: var(--text-2); padding:9px 18px; border-radius:100px; font-size:14px; transition: all .3s var(--ease); }
.proj-filter button:hover { border-color: var(--ink); color: var(--ink); }
.proj-filter button.active { background: var(--ink); border-color: var(--ink); color:#fff; }

/* ---------- Services detail (subpage) ---------- */
.svc-block { display:grid; grid-template-columns: .9fr 1.1fr; gap: clamp(32px,4.5vw,76px); align-items:center; padding-block: clamp(48px,6vw,96px); border-bottom:1px solid var(--line); }
.svc-block:nth-child(even) .sb-media { order: 2; }
@media (max-width: 900px){ .svc-block{ grid-template-columns:1fr; } .svc-block:nth-child(even) .sb-media{ order:0; } }
.svc-block .sb-media .ph { aspect-ratio: 4/3; }
.svc-block .sb-num { font-family:var(--mono); color: var(--accent); font-size:13px; letter-spacing:.1em; }
.svc-block h2 { font-size: clamp(27px,3.2vw,46px); margin: 14px 0 18px; font-weight:600; letter-spacing:-.025em; }
.svc-block .feat { list-style:none; margin-top:26px; display:grid; }
.svc-block .feat li { display:flex; gap:14px; padding:14px 0; border-top:1px solid var(--line); color: var(--text-2); font-size: 15.5px; }
.svc-block .feat li:last-child{ border-bottom:1px solid var(--line); }
.svc-block .feat li::before { content:"—"; color: var(--accent); }

/* ---------- Price tables ---------- */
.price-head { display:flex; flex-direction:column; gap:18px; margin-bottom: clamp(36px,4vw,60px); }
.price-group { margin-bottom: clamp(40px,4.5vw,68px); }
.price-group .pg-head { display:flex; align-items:baseline; gap:16px; padding-bottom: 18px; border-bottom: 1px solid var(--line-2); margin-bottom: 6px; }
.price-group .pg-num { font-family:var(--mono); font-size:13px; color: var(--accent); }
.price-group h3 { font-size: clamp(20px,2.2vw,30px); font-weight:600; letter-spacing:-.02em; color: var(--ink); }
.price-row { display:flex; align-items:baseline; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.price-row .pr-name { flex: 1; font-size: clamp(16px,1.5vw,19px); color: var(--text); }
.price-row .pr-dots { flex: 1; border-bottom: 1px dotted var(--line-2); transform: translateY(-4px); min-width: 24px; }
.price-row .pr-val { font-weight:600; font-size: clamp(16px,1.5vw,19px); color: var(--ink); white-space:nowrap; }
.price-row .pr-val .from { color: var(--text-3); font-weight:400; font-size:.8em; margin-right:6px; }
@media (max-width: 620px){ .price-row .pr-dots { display:none; } .price-row{ flex-wrap:wrap; gap:4px 14px; } }

.note-card { background: var(--bg-1); border:1px solid var(--line); border-radius:4px; padding: clamp(28px,3vw,40px); display:grid; gap: 14px; }
.note-card .nc-title { display:flex; align-items:center; gap:12px; font-weight:600; font-size:19px; color: var(--ink); letter-spacing:-.01em; }
.note-card .nc-title::before { content:""; width:9px; height:9px; background: var(--accent); border-radius:50%; }
.note-card p { color: var(--text-2); font-size:15.5px; }
.note-card a { color: var(--accent); }

/* ---------- reveal ---------- */
.rv { transition: opacity .85s var(--ease), transform .85s var(--ease); }
.reveal-on .rv:not(.in) { opacity:0; transform: translateY(24px); }
.rv-d1{ transition-delay:.08s;} .rv-d2{ transition-delay:.16s;} .rv-d3{ transition-delay:.24s;} .rv-d4{ transition-delay:.32s;}
@media (prefers-reduced-motion: reduce){ .reveal-on .rv:not(.in){ opacity:1; transform:none;} html{scroll-behavior:auto;} }