/* ============================================
   SilicoSoft Technologies — Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;0,9..144,900;1,9..144,400&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --ink: #0B1220;
  --ink-soft: #182338;
  --paper: #F5F1E8;
  --paper-warm: #EDE6D3;
  --paper-deep: #E4DAC0;
  --accent: #C8612A;
  --accent-soft: #E89B5F;
  --accent-deep: #8B3D13;
  --gold: #B8893A;
  --line: rgba(11, 18, 32, 0.12);
  --line-strong: rgba(11, 18, 32, 0.25);
  --muted: rgba(11, 18, 32, 0.62);

  --serif: 'Fraunces', 'Playfair Display', Georgia, serif;
  --sans: 'Inter', -apple-system, system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;

  --max: 1320px;
  --pad: clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(200, 97, 42, 0.06), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(11, 18, 32, 0.04), transparent 50%);
  background-attachment: fixed;
}

/* Subtle paper grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.04 0 0 0 0 0.07 0 0 0 0 0.12 0 0 0 0.15 0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
}

h1 { font-size: clamp(2.75rem, 7vw, 6rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3.75rem); }
h3 { font-size: clamp(1.35rem, 2.2vw, 1.85rem); letter-spacing: -0.01em; }
h4 { font-size: 1.1rem; font-family: var(--sans); font-weight: 600; letter-spacing: -0.005em; }

.italic { font-style: italic; font-weight: 300; }
.mono { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }

p { font-size: 1rem; color: var(--ink-soft); }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--paper); }

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 241, 232, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.15rem;
  font-weight: 600;
  position: relative;
  overflow: hidden;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, var(--accent) 50%);
  opacity: 0.85;
}
.brand-mark span {
  position: relative;
  z-index: 2;
}
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--muted);
  letter-spacing: 0.12em;
  font-weight: 400;
  margin-top: 2px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
  font-size: 0.93rem;
}
.nav-links a {
  position: relative;
  padding: 0.3rem 0;
  color: var(--ink);
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}

.nav-cta {
  padding: 0.65rem 1.2rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
  font-size: 0.87rem;
  font-weight: 500;
  transition: background 0.2s;
}
.nav-cta:hover { background: var(--accent-deep); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
}

/* ============================================
   Sections & Layout
   ============================================ */

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  position: relative;
  z-index: 2;
}

section { position: relative; z-index: 2; }

.section-pad { padding: clamp(5rem, 10vw, 9rem) 0; }
.section-pad-sm { padding: clamp(3.5rem, 7vw, 6rem) 0; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.eyebrow-dark { color: var(--accent-soft); }
.eyebrow-dark::before { background: var(--accent-soft); }

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 1rem 1.8rem;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: var(--sans);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
}
.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 2px;
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn-link {
  background: none;
  padding: 0.4rem 0;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  font-weight: 500;
}
.btn-link:hover { color: var(--accent); border-bottom-color: var(--accent); }

.btn .arrow { transition: transform 0.25s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(5rem, 10vw, 8rem);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 0.45fr;
  gap: 4rem;
  align-items: end;
}

.hero h1 {
  font-size: clamp(3rem, 8.5vw, 7.5rem);
  line-height: 0.95;
  margin-bottom: 2rem;
  letter-spacing: -0.035em;
}
.hero h1 .italic { color: var(--accent); }

.hero-meta {
  border-top: 1px solid var(--ink);
  padding-top: 1.5rem;
}
.hero-meta p {
  font-size: 1.05rem;
  line-height: 1.55;
  max-width: 30ch;
}
.hero-meta .mono {
  display: block;
  margin-bottom: 0.8rem;
  color: var(--muted);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

/* Decorative number ticker */
.hero-ticker {
  display: flex;
  gap: 3rem;
  margin-top: 4.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}
.hero-ticker .stat .num {
  font-family: var(--serif);
  font-size: 2.75rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero-ticker .stat .num .italic { color: var(--accent); }
.hero-ticker .stat .lbl {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.4rem;
  max-width: 16ch;
}

/* ============================================
   Cards / Grids
   ============================================ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--paper-warm);
  padding: 2.2rem 1.8rem;
  border-radius: 4px;
  border: 1px solid var(--line);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 20px 40px -20px rgba(11, 18, 32, 0.15);
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.4s ease;
}
.card:hover::before { width: 100%; }

.card .num {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  margin-bottom: 1.6rem;
  display: block;
}
.card h3 {
  margin-bottom: 0.9rem;
  font-family: var(--serif);
}
.card p {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ============================================
   Split sections
   ============================================ */

.split {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 5rem;
  align-items: start;
}
.split-reverse { grid-template-columns: 1fr 0.85fr; }

/* ============================================
   Dark section
   ============================================ */

.dark-section {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.dark-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 70% 30%, rgba(200, 97, 42, 0.18), transparent 55%),
    radial-gradient(ellipse at 15% 85%, rgba(184, 137, 58, 0.1), transparent 60%);
}
.dark-section p { color: rgba(245, 241, 232, 0.72); }
.dark-section .card {
  background: rgba(245, 241, 232, 0.035);
  border-color: rgba(245, 241, 232, 0.1);
}
.dark-section .card p { color: rgba(245, 241, 232, 0.6); }
.dark-section .card:hover {
  background: rgba(245, 241, 232, 0.06);
  border-color: var(--accent);
}

/* ============================================
   Product rows
   ============================================ */

.product-row {
  display: grid;
  grid-template-columns: 0.35fr 1fr 0.85fr;
  gap: 3rem;
  padding: 3.5rem 0;
  border-top: 1px solid var(--line-strong);
  align-items: start;
}
.product-row:last-child { border-bottom: 1px solid var(--line-strong); }

.product-code {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
  padding-top: 0.8rem;
}
.product-code strong {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 2.4rem;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-top: 0.5rem;
  text-transform: none;
}

.product-body h3 {
  margin-bottom: 1rem;
  max-width: 20ch;
}
.product-body p {
  font-size: 1rem;
  max-width: 52ch;
  margin-bottom: 1.5rem;
}
.product-features {
  list-style: none;
  columns: 2;
  column-gap: 2rem;
}
.product-features li {
  font-size: 0.88rem;
  padding: 0.4rem 0;
  color: var(--ink-soft);
  break-inside: avoid;
  border-bottom: 1px dotted var(--line);
}
.product-features li::before {
  content: "→ ";
  color: var(--accent);
  font-family: var(--mono);
}

.product-visual {
  background: var(--ink);
  border-radius: 4px;
  aspect-ratio: 4/3;
  padding: 1.5rem;
  color: var(--paper);
  position: relative;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.72rem;
}

/* ============================================
   Footer
   ============================================ */

footer {
  background: var(--ink);
  color: var(--paper);
  padding: 5rem 0 2rem;
  position: relative;
  z-index: 2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid rgba(245, 241, 232, 0.15);
}

footer h4 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

footer ul {
  list-style: none;
}
footer li {
  padding: 0.35rem 0;
  font-size: 0.92rem;
}
footer a {
  color: rgba(245, 241, 232, 0.7);
  transition: color 0.2s;
}
footer a:hover { color: var(--accent-soft); }

.footer-brand h2 {
  font-size: 2.1rem;
  color: var(--paper);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
.footer-brand p {
  color: rgba(245, 241, 232, 0.62);
  font-size: 0.92rem;
  max-width: 30ch;
}

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: rgba(245, 241, 232, 0.5);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============================================
   Marquee
   ============================================ */

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.5rem 0;
  background: var(--paper-warm);
}
.marquee-track {
  display: flex;
  gap: 4rem;
  animation: scroll 40s linear infinite;
  white-space: nowrap;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.8rem;
  color: var(--ink);
}
.marquee-track span { display: inline-flex; align-items: center; gap: 4rem; }
.marquee-track .dot { color: var(--accent); font-style: normal; }

@keyframes scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================
   Page header (inner pages)
   ============================================ */

.page-head {
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--line);
}
.page-head .container {
  display: grid;
  grid-template-columns: 0.35fr 1fr;
  gap: 4rem;
  align-items: end;
}
.page-head h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 1;
  letter-spacing: -0.03em;
}
.page-head h1 .italic { color: var(--accent); }
.page-head .desc {
  font-size: 1.05rem;
  max-width: 45ch;
  margin-top: 2rem;
}

.crumb {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.crumb span:first-child { color: var(--accent); }

/* ============================================
   Contact form
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 5rem;
}
.contact-info h3 {
  margin-bottom: 1.5rem;
}
.info-block {
  padding: 1.4rem 0;
  border-top: 1px solid var(--line);
}
.info-block:last-child { border-bottom: 1px solid var(--line); }
.info-block h4 {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.info-block p { color: var(--ink); font-size: 1rem; }

form { display: grid; gap: 1.2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.9rem 1rem;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
  transition: border 0.2s;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--paper);
}
.field textarea { min-height: 140px; resize: vertical; }

/* ============================================
   Approach / Process
   ============================================ */

.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}
.process-step {
  padding: 2.5rem 1.8rem;
  border-right: 1px solid var(--line);
  position: relative;
}
.process-step:last-child { border-right: none; }
.process-step .num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  display: block;
  margin-bottom: 1.2rem;
}
.process-step h3 {
  font-family: var(--serif);
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
}
.process-step p { font-size: 0.9rem; }

/* ============================================
   Pull quote
   ============================================ */

.pullquote {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  max-width: 22ch;
  margin: 0 auto;
  text-align: center;
  font-weight: 400;
}
.pullquote .italic { color: var(--accent); }
.pullquote-meta {
  text-align: center;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ============================================
   AI Page specific
   ============================================ */

.capability-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}
.capability {
  padding: 2.5rem 2rem;
  border-bottom: 1px solid var(--line);
}
.capability:nth-child(odd) { border-right: 1px solid var(--line); }
.capability:last-child,
.capability:nth-last-child(2) { border-bottom: 1px solid var(--line-strong); }
.capability .code {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  display: block;
}
.capability h3 { margin-bottom: 0.8rem; }
.capability p { font-size: 0.93rem; }

/* ============================================
   Animations
   ============================================ */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  animation: fadeUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.reveal-1 { animation-delay: 0.05s; }
.reveal-2 { animation-delay: 0.2s; }
.reveal-3 { animation-delay: 0.35s; }
.reveal-4 { animation-delay: 0.5s; }
.reveal-5 { animation-delay: 0.65s; }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 960px) {
  .hero-grid, .split, .split-reverse, .page-head .container,
  .contact-grid, .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .product-row { grid-template-columns: 1fr; gap: 1.5rem; }
  .process { grid-template-columns: 1fr 1fr; }
  .process-step:nth-child(2) { border-right: none; }
  .process-step:nth-child(1), .process-step:nth-child(2) { border-bottom: 1px solid var(--line); }
  .capability-list { grid-template-columns: 1fr; }
  .capability { border-right: none !important; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-features { columns: 1; }

  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--paper);
    padding: 1.5rem var(--pad);
    border-bottom: 1px solid var(--line);
    gap: 1rem;
  }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .process { grid-template-columns: 1fr; }
  .process-step { border-right: none; border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-ticker { gap: 2rem; }
  .hero-ticker .stat .num { font-size: 2rem; }
}