/* ==========================================================================
   Dreambox v4 — "Institutional" design, general development-company content
   Palette: slate navy (dark regions) · steel blue · teal · cool grey paper
   ========================================================================== */

:root {
  --ink: #1d3557;          /* hero / primary dark region */
  --ink-hi: #2b4a7a;       /* lighter end of dark gradient */
  --panel: #1a3152;        /* panels sitting on light or dark */
  --deep: #182d4c;         /* footer / contact card */

  --bg: #f2f5f9;
  --paper: #ffffff;
  --line: #dbe3ee;
  --text: #16233b;
  --muted: #546480;
  --on-ink: #eef3fa;
  --on-ink-muted: #b4c3da;

  --blue: #5aa2f0;         /* accent on dark */
  --blue-strong: #2f74c9;  /* accent on light / buttons */
  --teal: #35bfae;
  --amber: #e3b55f;
  --up: #34c38f;
  --down: #e5696a;

  --radius: 14px;
  --container: 1200px;
  --shadow: 0 24px 50px -30px rgba(22, 35, 59, 0.45);

  --font: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body, h1, h2, h3, h4, p, ul, figure, pre { margin: 0; padding: 0; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 28px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.ico { width: 22px; height: 22px; flex-shrink: 0; }
.accent { color: var(--blue); }

/* -------------------- Reveal on scroll -------------------- */
.js .reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--d, 0s);
}
.js .reveal.in { opacity: 1; transform: none; }

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 28px;
  font: 600 0.94rem/1 var(--font);
  border-radius: 8px; border: 1px solid transparent; cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
  white-space: nowrap;
}
.btn .ico { width: 18px; height: 18px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue-strong); color: #fff; }
.btn-primary:hover { background: #2764b0; }
.btn-outline { color: var(--on-ink); border-color: rgba(255, 255, 255, 0.35); background: transparent; }
.btn-outline:hover { border-color: #fff; }

/* -------------------- Header -------------------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(29, 53, 87, 0.92);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--on-ink);
}
.site-header .bar { max-width: var(--container); margin: 0 auto; padding: 0 28px; height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 600 1.15rem/1 var(--font); letter-spacing: 0.01em; }
.brand-mark { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 6px; }
.nav-links a { padding: 8px 14px; font-size: 0.9rem; font-weight: 500; color: var(--on-ink-muted); border-bottom: 2px solid transparent; transition: color 0.15s ease; }
.nav-links a:hover { color: #fff; }
.nav-links a.active { color: #fff; border-bottom-color: var(--blue); }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-cta .btn { padding: 11px 20px; font-size: 0.88rem; }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 8px; align-items: center; justify-content: center; background: transparent; border: 1px solid rgba(255, 255, 255, 0.3); color: #fff; cursor: pointer; }

/* -------------------- Hero -------------------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(155deg, var(--ink-hi) 0%, var(--ink) 60%);
  color: var(--on-ink);
  padding: 148px 0 150px;
}
.hero::after { /* fine grid, static */
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
}
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 14px; border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.22); background: rgba(255, 255, 255, 0.06);
  font: 500 0.78rem var(--font-mono); letter-spacing: 0.04em; color: var(--on-ink-muted);
  margin-bottom: 26px;
}
.hero-badge svg { width: 15px; height: 15px; color: var(--blue); }
.hero h1 { font: 600 clamp(2.2rem, 3.6vw, 3.1rem)/1.12 var(--font); letter-spacing: -0.02em; margin-bottom: 24px; }
.hero .lead { font-size: 1.1rem; color: var(--on-ink-muted); max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; font: 400 0.78rem var(--font-mono); color: var(--on-ink-muted); }
.hero-meta span::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 1px; background: var(--teal); margin-right: 9px; vertical-align: 1px; }

/* panels + hero workbench */
.hero-art { position: relative; width: 100%; max-width: 640px; margin-left: auto; }
.panel {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  box-shadow: 0 30px 60px -30px rgba(8, 16, 34, 0.6);
  color: var(--on-ink);
}
.panel-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 14px; padding: 12px 16px; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.panel-title { font: 500 0.74rem var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--on-ink-muted); }
.panel-title b { color: var(--up); font-weight: 500; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font: 400 0.7rem var(--font-mono); color: var(--on-ink-muted); }
.legend i { display: inline-block; width: 10px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: 2px; }
.panel svg text { font-family: var(--font-mono); }

.workbench { display: grid; grid-template-columns: 1.2fr 1fr; gap: 12px; padding: 12px; }
.wb-tile { min-width: 0; padding: 12px 14px; border-radius: 10px; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.12); }
.wb-label { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font: 500 0.68rem var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--on-ink-muted); }
.wb-label .ico { width: 15px; height: 15px; color: var(--blue); }
.wb-chart { grid-row: span 2; display: flex; flex-direction: column; }
.wb-chart > svg { width: 100%; height: auto; flex: 1; }
.wb-code pre { font: 400 0.72rem/1.75 var(--font-mono); color: var(--on-ink-muted); white-space: pre-wrap; }
.tk-k { color: var(--blue); }
.tk-s { color: var(--amber); }
.tk-g { color: var(--up); }
.wb-steps li { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 5px 0; font: 400 0.76rem var(--font-mono); color: var(--on-ink); border-bottom: 1px dashed rgba(255, 255, 255, 0.12); }
.wb-steps li:last-child { border-bottom: 0; }
.wb-steps li span { color: var(--up); font-size: 0.7rem; }
.wb-steps li span.run { color: var(--amber); }
.wb-chat { grid-column: 1 / -1; display: grid; gap: 8px; }
.bubble { max-width: 82%; padding: 8px 12px; border-radius: 8px; font-size: 0.8rem; line-height: 1.45; }
.bubble.user { background: rgba(255, 255, 255, 0.1); color: var(--on-ink); }
.bubble.bot { justify-self: end; background: rgba(90, 162, 240, 0.2); border: 1px solid rgba(90, 162, 240, 0.4); color: var(--on-ink); }

/* -------------------- Stats strip -------------------- */
.stats { position: relative; z-index: 3; margin-top: -76px; padding-bottom: 8px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.stat { padding: 28px 28px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font: 600 2.3rem/1 var(--font); letter-spacing: -0.02em; color: var(--blue-strong); margin-bottom: 8px; }
.stat span { color: var(--muted); font-size: 0.9rem; line-height: 1.4; display: block; }

/* -------------------- Section scaffolding -------------------- */
section { padding: 104px 0; position: relative; }
.eyebrow { display: inline-block; font: 500 0.76rem var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--blue-strong); margin-bottom: 16px; }
.eyebrow::before { content: '// '; opacity: 0.6; }
.h2 { font: 600 clamp(1.8rem, 3vw, 2.6rem)/1.15 var(--font); letter-spacing: -0.02em; }
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head p { color: var(--muted); font-size: 1.08rem; margin-top: 16px; }

/* -------------------- About -------------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-copy p { color: var(--muted); font-size: 1.04rem; margin-top: 18px; }
.about-copy .h2 { margin-top: 2px; }
.fact-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.fact { display: inline-flex; align-items: center; gap: 10px; padding: 9px 16px 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); font-weight: 500; font-size: 0.9rem; }
.fact .ico { width: 18px; height: 18px; color: var(--blue-strong); }

.engage { padding: 8px; }
.engage-rows { display: grid; gap: 8px; padding: 8px; }
.engage-row { display: grid; grid-template-columns: 44px 1fr; gap: 16px; padding: 16px 16px; border-radius: 10px; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.12); }
.engage-row .ico { width: 44px; height: 44px; padding: 11px; border-radius: 10px; background: rgba(90, 162, 240, 0.18); color: var(--blue); }
.engage-row h3 { font: 600 1.02rem var(--font); margin-bottom: 3px; }
.engage-row p { font-size: 0.9rem; line-height: 1.5; color: var(--on-ink-muted); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin: 4px 8px 8px; padding: 16px 6px 8px; border-top: 1px solid rgba(255, 255, 255, 0.12); }
.step { position: relative; padding: 0 10px; text-align: left; }
.step::before { content: ''; position: absolute; left: 10px; right: -10px; top: 6px; height: 2px; background: rgba(255, 255, 255, 0.16); }
.step:last-child::before { display: none; }
.step i { position: relative; display: block; width: 14px; height: 14px; margin-bottom: 12px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px var(--panel); }
.step b { display: block; font: 500 0.66rem var(--font-mono); letter-spacing: 0.08em; color: var(--on-ink-muted); }
.step span { font: 600 0.92rem var(--font); }

/* -------------------- Services -------------------- */
#services { background: var(--paper); }
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.tile { grid-column: span 2; padding: 28px 26px 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.tile:hover { border-color: var(--blue-strong); box-shadow: var(--shadow); }
.tile.s3 { grid-column: span 3; }
.tile .icon { width: 46px; height: 46px; border-radius: 10px; display: grid; place-items: center; color: #fff; background: var(--ink); margin-bottom: 30px; }
.tile h3 { font: 600 1.15rem/1.25 var(--font); margin-bottom: 8px; }
.tile p { color: var(--muted); font-size: 0.95rem; }

/* -------------------- Projects -------------------- */
.proj-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.proj { display: flex; flex-direction: column; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.proj:hover { border-color: var(--blue-strong); box-shadow: var(--shadow); }
.proj-art { position: relative; aspect-ratio: 400 / 220; overflow: hidden; }
.proj-art svg { width: 100%; height: 100%; }
.proj-logo { position: absolute; left: 16px; bottom: 14px; width: 42px; height: 42px; border-radius: 10px; padding: 7px; background: #fff; box-shadow: 0 8px 18px -8px rgba(0, 0, 0, 0.5); object-fit: contain; display: grid; place-items: center; }
.proj-logo-c { font: 700 1.2rem var(--font); color: #fff; background: var(--blue-strong); padding: 0; }
.proj-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.proj-body h3 { font: 600 1.35rem/1.15 var(--font); margin-bottom: 4px; }
.proj-kind { font: 500 0.7rem var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue-strong); margin-bottom: 12px; }
.proj-body p { color: var(--muted); font-size: 0.94rem; margin-bottom: 4px; }
.proj-link { margin-top: auto; padding-top: 18px; font: 500 0.82rem var(--font-mono); color: var(--blue-strong); }
.proj:hover .proj-link { text-decoration: underline; }

/* Finopts feature card */
.proj-feature { grid-column: span 2; display: grid; grid-template-columns: 1.1fr 1fr; }
.proj-feature .feat-art { padding: 14px; background: var(--ink); display: flex; }
.proj-feature .feat-art .panel { flex: 1; display: flex; flex-direction: column; box-shadow: none; }
.proj-feature .feat-art .panel-head { padding: 10px 14px; }
.proj-feature .feat-art .panel svg { width: 100%; height: auto; padding: 4px 8px 8px; }
.proj-feature .proj-body { padding: 34px 36px; justify-content: center; }
.proj-feature .proj-body h3 { display: flex; align-items: center; gap: 12px; font-size: 1.9rem; }
.proj-feature .proj-body h3 img { width: 38px; height: 38px; padding: 6px; border: 1px solid var(--line); border-radius: 9px; }
.proj-feature .proj-body p { font-size: 1rem; }
.kw { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 18px 0 4px; font: 400 0.78rem var(--font-mono); color: var(--muted); }
.kw span::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 1px; background: var(--teal); margin-right: 8px; vertical-align: 1px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.chip { font: 500 0.7rem var(--font-mono); padding: 4px 9px; border-radius: 5px; background: var(--bg); border: 1px solid var(--line); color: var(--ink); }
.chips-label { margin-top: 18px; font: 500 0.68rem var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.chips-label + .chips { margin-top: 8px; }

.background-row { margin-top: 48px; padding: 30px 34px; border-radius: 16px; background: var(--panel); color: var(--on-ink); display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 36px; align-items: center; }
.background-row .eyebrow { color: var(--blue); margin-bottom: 8px; }
.background-row h3 { font: 600 1.4rem/1.2 var(--font); }
.bg-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.bg-item { padding: 13px 16px; border-radius: 10px; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.14); }
.bg-item b { display: block; font-weight: 600; font-size: 0.95rem; }
.bg-item span { font-size: 0.8rem; color: var(--on-ink-muted); line-height: 1.4; display: block; }
.clients-note { margin-top: 20px; font-size: 0.8rem; color: var(--muted); max-width: 860px; }

/* -------------------- Expertise -------------------- */
#expertise { background: var(--paper); }
.challenge-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.challenge { padding: 26px 24px 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.challenge:hover { border-color: var(--blue-strong); box-shadow: var(--shadow); }
.challenge .icon { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; color: #fff; background: var(--ink); margin-bottom: 22px; }
.challenge .icon .ico { width: 21px; height: 21px; }
.challenge h3 { font: 600 1.08rem/1.3 var(--font); margin-bottom: 14px; }
.challenge ul { display: grid; gap: 9px; }
.challenge li { position: relative; padding-left: 16px; font-size: 0.9rem; line-height: 1.5; color: var(--muted); }
.challenge li::before { content: ''; position: absolute; left: 0; top: 0.6em; width: 6px; height: 6px; border-radius: 1px; background: var(--teal); }

/* -------------------- Contact -------------------- */
.contact { padding-bottom: 110px; }
.contact-card { padding: 78px 40px; border-radius: 20px; text-align: center; color: var(--on-ink); background: linear-gradient(155deg, var(--ink-hi), var(--deep)); position: relative; overflow: hidden; }
.contact-card::after { content: ''; position: absolute; inset: 0; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 48px 48px; -webkit-mask-image: radial-gradient(ellipse at center, #000, transparent 75%); mask-image: radial-gradient(ellipse at center, #000, transparent 75%); }
.contact-card > * { position: relative; z-index: 1; }
.contact-card .eyebrow { color: var(--blue); }
.contact-card h2 { font: 600 clamp(1.9rem, 3.6vw, 2.9rem)/1.15 var(--font); letter-spacing: -0.02em; max-width: 720px; margin: 0 auto 16px; }
.contact-card p { color: var(--on-ink-muted); font-size: 1.06rem; max-width: 560px; margin: 0 auto 34px; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 26px; }
.copy-btn[data-copied='true'] { border-color: var(--teal); color: var(--teal); }
.contact-meta { color: var(--on-ink-muted); font: 400 0.82rem var(--font-mono); }
.contact-channels { display: flex; flex-direction: column; align-items: center; gap: 14px; margin: 30px auto 0; padding-top: 26px; max-width: 420px; border-top: 1px solid rgba(255, 255, 255, 0.12); }
.contact-channels-label { color: var(--on-ink-muted); font: 500 0.72rem var(--font-mono); letter-spacing: 0.12em; text-transform: uppercase; }
.channel-list { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; list-style: none; margin: 0; padding: 0; }
.channel { display: inline-flex; align-items: center; gap: 9px; padding: 8px 16px 8px 9px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.05); color: var(--on-ink); font: 500 0.92rem var(--font); text-decoration: none; transition: border-color .2s, background .2s, transform .2s; }
.channel img { width: 22px; height: 22px; flex: none; display: block; }
.channel:hover { border-color: rgba(255, 255, 255, 0.5); background: rgba(255, 255, 255, 0.1); transform: translateY(-1px); }
.channel:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

/* -------------------- Footer -------------------- */
.site-footer { background: var(--deep); color: var(--on-ink-muted); padding: 56px 0 32px; }
.footer-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 32px; border-bottom: 1px solid rgba(255, 255, 255, 0.12); }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font: 600 1.15rem var(--font); }
.footer-tagline { margin-top: 10px; font-size: 0.9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: flex-start; font-size: 0.9rem; }
.footer-links a:hover, .footer-bottom a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 24px; font-size: 0.84rem; }

.back-to-top { position: fixed; right: 22px; bottom: 22px; z-index: 40; width: 46px; height: 46px; border-radius: 10px; border: 0; cursor: pointer; background: var(--blue-strong); color: #fff; display: grid; place-items: center; box-shadow: 0 12px 24px -10px rgba(22, 35, 59, 0.6); opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; }
.back-to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top svg { width: 20px; height: 20px; }

/* -------------------- Responsive -------------------- */
@media (max-width: 1100px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-art { margin: 10px auto 0; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .challenge-grid { grid-template-columns: repeat(2, 1fr); }
  .background-row { grid-template-columns: 1fr; gap: 22px; }
}

@media (max-width: 900px) {
  .nav-links { position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; padding: 8px 20px 16px; background: rgba(24, 45, 76, 0.98); border-bottom: 1px solid rgba(255, 255, 255, 0.12); opacity: 0; transform: translateY(-6px); pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; }
  .menu-open .nav-links { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 13px 4px; font-size: 1rem; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .tile, .tile.s3 { grid-column: span 1; }
  .proj-grid { grid-template-columns: 1fr; }
  .proj-feature { grid-column: span 1; grid-template-columns: 1fr; }
  .proj-feature .feat-art .panel { max-width: 640px; margin: 0 auto; }
}

@media (max-width: 640px) {
  section { padding: 72px 0; }
  .container, .site-header .bar { padding: 0 20px; }
  .hero { padding: 116px 0 130px; }
  .workbench { grid-template-columns: 1fr; }
  .wb-chart { grid-row: auto; }
  .challenge-grid, .bento { grid-template-columns: 1fr; }
  .tile, .tile.s3 { grid-column: span 1; }
  .bg-list { grid-template-columns: 1fr; }
  .background-row { padding: 30px 22px; }
  .contact-card { padding: 56px 22px; }
  .stat { padding: 20px 16px; }
  .stat b { font-size: 1.9rem; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 18px; }
  .step:nth-child(2)::before { display: none; }
  .proj-feature .proj-body { padding: 26px 22px; }
  .hero-actions .btn, .contact-actions .btn { width: 100%; }
  .legend { display: none; }
}

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