/* ============================================
   Syberden — Studio site
   Palette: slate ink on soft paper, one precise indigo accent
   Type: Space Grotesk (display) + Inter (body) + IBM Plex Mono (utility)
   ============================================ */

:root {
  --paper: #f6f7fa;
  --paper-raised: #ffffff;
  --ink: #171b24;
  --ink-soft: #4b5364;
  --line: #dfe3ea;
  --line-strong: #c3c9d4;
  --accent: #2f3fe0;
  --accent-ink: #1c2790;
  --accent-tint: #e8eafc;

  --display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;

  --max: 1120px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* -------- coordinate corner marks (signature motif) -------- */
.mark {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

/* -------- header -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(246, 247, 250, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 1px;
  transform: rotate(45deg);
  flex: none;
}

.nav {
  display: flex;
  gap: 32px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.nav a {
  color: var(--ink-soft);
  position: relative;
  padding-bottom: 4px;
  transition: color 0.15s ease;
}

.nav a:hover, .nav a.active {
  color: var(--ink);
}

.nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--accent);
}

/* -------- buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
}

/* -------- hero -------- */
.hero {
  padding: 90px 0 70px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.hero .mark {
  margin-bottom: 22px;
}

.hero h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 0 0 26px;
  max-width: 14ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p.lede {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 34px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* -------- section scaffolding -------- */
section { padding: 76px 0; }
section + section { border-top: 1px solid var(--line); }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(26px, 3.4vw, 36px);
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.section-intro {
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 48px;
  font-size: 17px;
}

/* -------- service tags row (categories, not a sequence — no numbering) -------- */
.tags {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.tag-cell {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 28px 22px;
}

.tag-cell .k {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.tag-cell h3 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 8px;
}

.tag-cell p {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
}

/* -------- services list (detail rows) -------- */
.service-row {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 36px 0;
  border-top: 1px solid var(--line);
}

.service-row:last-child { border-bottom: 1px solid var(--line); }

.service-row .tag {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: 4px;
}

.service-row h3 {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 10px;
}

.service-row p {
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 16px;
}

.service-row ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.service-row li {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink);
  position: relative;
  padding-left: 16px;
}

.service-row li::before {
  content: "";
  position: absolute;
  left: 0; top: 6px;
  width: 6px; height: 6px;
  background: var(--accent);
}

/* -------- about / values -------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.value-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 28px 24px;
}

.value-card .k {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 10px;
}

.value-card h3 {
  font-family: var(--display);
  font-size: 17px;
  margin: 0 0 8px;
}

.value-card p {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
}

/* -------- contact -------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-block h3 {
  font-family: var(--display);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.contact-block a.big {
  font-family: var(--display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  padding-bottom: 2px;
  margin-bottom: 40px;
}

.contact-block a.big:hover { color: var(--accent); }

.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  padding: 12px 14px;
  font-family: var(--body);
  font-size: 15px;
  color: var(--ink);
}

.field textarea { min-height: 120px; resize: vertical; }

.field input:focus, .field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* -------- footer -------- */
footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

footer .mark { color: var(--ink-soft); }

/* -------- responsive -------- */
@media (max-width: 860px) {
  .nav { display: none; }
  .tags { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .service-row { grid-template-columns: 1fr; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}