/* =========================================================
   WEHAMH, PC — main stylesheet
   Dark theme, unique palette (graphite + amber + violet)
   ========================================================= */

:root {
  --bg: #0B0E14;
  --bg-2: #10141D;
  --bg-3: #161B27;
  --surface: #131826;
  --surface-2: #1A2030;
  --border: #232A3B;
  --border-soft: #1B2233;
  --text: #E8EAED;
  --text-dim: #9AA3B5;
  --text-faint: #6C7690;
  --amber: #F0A83C;
  --amber-soft: #E8C07A;
  --violet: #8B6CF0;
  --violet-soft: #B39DF5;
  --green: #53C68C;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --nav-w: 280px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

/* =========================================================
   Layout: left sidebar nav + main content
   ========================================================= */

.layout { min-height: 100vh; }

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-w);
  height: 100vh;
  background-color: var(--bg-2);
  border-right: 1px solid var(--border-soft);
  display: flex;
  z-index: 60;
}

.site-nav-inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--amber), #d18a1f);
  color: #14100a;
  font-weight: 800;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.04em;
  color: var(--text);
}

.brand-sub { color: var(--amber); }

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 40px;
}

.nav-link {
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
  background-color: var(--surface);
  color: var(--text);
}

.nav-cta {
  margin-top: auto;
  display: block;
  text-align: center;
  background-color: var(--amber);
  color: #14100a;
  font-weight: 700;
  padding: 13px 18px;
  border-radius: 12px;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.nav-cta:hover {
  background-color: var(--amber-soft);
  transform: translateY(-2px);
}

.nav-meta {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
}

.nav-meta-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 4px;
}

.nav-meta-link {
  color: var(--text-dim);
  font-size: 14px;
}

.nav-meta-link:hover { color: var(--amber); }

.main {
  margin-left: var(--nav-w);
  min-height: 100vh;
}

/* =========================================================
   Mobile nav toggle
   ========================================================= */

.nav-toggle {
  display: none;
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background-color: var(--surface);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Shared section primitives
   ========================================================= */

.section-head { max-width: 720px; margin-bottom: 48px; }

.eyebrow {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--amber);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-sub { margin-top: 16px; color: var(--text-dim); font-size: 17px; }

.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 16px;
  border: none;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn-primary {
  background-color: var(--amber);
  color: #14100a;
}

.btn-primary:hover { background-color: var(--amber-soft); transform: translateY(-2px); }

.btn-ghost {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover { border-color: var(--violet); color: var(--violet-soft); }

/* =========================================================
   Hero — asymmetric two-column
   ========================================================= */

.hero-section {
  padding: 96px 64px 80px;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(circle at 85% 20%, rgba(139, 108, 240, 0.14), transparent 45%),
    var(--bg);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(34px, 4.6vw, 60px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-lede {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }

.hero-stats {
  display: flex;
  gap: 40px;
  list-style: none;
  flex-wrap: wrap;
}

.hero-stats li { display: flex; flex-direction: column; }

.hero-stats strong {
  font-size: 30px;
  font-weight: 800;
  color: var(--amber);
}

.hero-stats span { font-size: 14px; color: var(--text-faint); }

/* system architecture card (hero visual) */

.hero-visual { position: relative; }

.sys-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sys-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background-color: var(--bg-3);
  border-bottom: 1px solid var(--border-soft);
}

.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot-a { background-color: #E05B5B; }
.dot-b { background-color: #E0B34B; }
.dot-c { background-color: #53C68C; }

.sys-card-title {
  margin-left: 8px;
  font-family: "SFMono-Regular", ui-monospace, monospace;
  font-size: 13px;
  color: var(--text-faint);
}

.sys-card-body { padding: 22px; }

.sys-line {
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  font-family: "SFMono-Regular", ui-monospace, monospace;
  font-size: 13px;
  border-bottom: 1px dashed var(--border-soft);
}

.sys-k { color: var(--text-faint); }
.sys-v { color: var(--text); }
.sys-ok { color: var(--green); font-weight: 600; }

.sys-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  padding: 18px 0;
}

.sys-node {
  aspect-ratio: 1;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid var(--border);
}

.node-app { background: rgba(139, 108, 240, 0.18); color: var(--violet-soft); border: 1px solid rgba(139, 108, 240, 0.4); }
.node-db { background: rgba(240, 168, 60, 0.14); color: var(--amber-soft); border: 1px solid rgba(240, 168, 60, 0.35); }
.node-cache { background: rgba(83, 198, 140, 0.14); color: var(--green); border: 1px solid rgba(83, 198, 140, 0.35); }
.node-edge { background: rgba(154, 163, 181, 0.12); color: var(--text-dim); border-color: var(--border); }

.sys-float {
  position: absolute;
  background-color: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.sys-float-a { top: -24px; right: -12px; }
.sys-float-b { bottom: -20px; left: -16px; }

.sys-float-num { font-size: 22px; font-weight: 800; color: var(--amber); }
.sys-float-label { font-size: 12px; color: var(--text-faint); }

/* =========================================================
   Signal section
   ========================================================= */

.signal-section {
  padding: 96px 64px;
  background-color: var(--bg-2);
  border-bottom: 1px solid var(--border-soft);
}

.signal-inner { max-width: 1200px; margin: 0 auto; }

.signal-label {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--violet-soft);
  margin-bottom: 20px;
}

.signal-heading {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.3;
  font-weight: 700;
  max-width: 900px;
  margin-bottom: 40px;
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.signal-grid p { color: var(--text-dim); font-size: 16px; }

/* =========================================================
   Capabilities (numbered list)
   ========================================================= */

.capabilities-section {
  padding: 96px 64px;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border-soft);
}

.cap-inner { max-width: 1200px; margin: 0 auto; }

.cap-list { display: flex; flex-direction: column; }

.cap-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 30px 0;
  border-bottom: 1px solid var(--border-soft);
}

.cap-item:last-child { border-bottom: none; }

.cap-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--violet);
  line-height: 1;
  font-family: "SFMono-Regular", ui-monospace, monospace;
}

.cap-body h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.cap-body p { color: var(--text-dim); max-width: 720px; }

/* =========================================================
   Industries (horizontal scroll cards)
   ========================================================= */

.industries-section {
  padding: 96px 64px;
  background-color: var(--bg-2);
  border-bottom: 1px solid var(--border-soft);
  overflow: hidden;
}

.ind-inner { max-width: 1200px; margin: 0 auto; }

.ind-scroll {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 240px;
  gap: 20px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
}

.ind-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  scroll-snap-align: start;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.ind-card:hover { transform: translateY(-4px); border-color: var(--violet); }

.ind-icon {
  display: block;
  font-size: 30px;
  color: var(--amber);
  margin-bottom: 16px;
}

.ind-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.ind-card p { font-size: 14px; color: var(--text-dim); }

/* =========================================================
   Engagement models (comparison table)
   ========================================================= */

.models-section {
  padding: 96px 64px;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border-soft);
}

.models-inner { max-width: 1200px; margin: 0 auto; }

.models-table {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.model-col { display: flex; flex-direction: column; }

.model-cell {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 15px;
}

.model-col:last-child .model-cell { border-bottom: none; }

.model-head .model-cell {
  background-color: var(--bg-3);
  font-weight: 700;
  color: var(--text);
}

.model-empty { background-color: var(--bg-3); }

.model-label {
  color: var(--text-faint);
  font-weight: 600;
  background-color: var(--surface-2);
}

.model-col:not(.model-head) .model-cell:not(.model-label) { color: var(--text-dim); }

/* =========================================================
   Process (timeline)
   ========================================================= */

.process-section {
  padding: 96px 64px;
  background-color: var(--bg-2);
  border-bottom: 1px solid var(--border-soft);
}

.process-inner { max-width: 900px; margin: 0 auto; }

.timeline { list-style: none; position: relative; padding-left: 0; }

.timeline::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--border);
}

.tl-item {
  position: relative;
  padding-left: 80px;
  padding-bottom: 40px;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--surface);
  border: 2px solid var(--violet);
  color: var(--violet-soft);
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tl-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.tl-body p { color: var(--text-dim); }

/* =========================================================
   Metrics
   ========================================================= */

.metrics-section {
  padding: 72px 64px;
  background-color: var(--bg-3);
  border-bottom: 1px solid var(--border-soft);
}

.metrics-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.metric { text-align: center; display: flex; flex-direction: column; }

.metric-num {
  font-size: 52px;
  font-weight: 800;
  color: var(--amber);
  line-height: 1;
}

.metric-label { margin-top: 10px; font-size: 15px; color: var(--text-dim); }

/* =========================================================
   FAQ
   ========================================================= */

.faq-section {
  padding: 96px 64px;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border-soft);
}

.faq-inner { max-width: 820px; margin: 0 auto; }

.faq-list { display: flex; flex-direction: column; gap: 14px; }

.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.faq-q {
  width: 100%;
  text-align: left;
  background-color: transparent;
  border: none;
  color: var(--text);
  font-size: 17px;
  font-weight: 600;
  padding: 20px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-q::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: var(--amber);
  transition: transform 0.25s ease;
}

.faq-item.open .faq-q::after { transform: rotate(45deg); }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-a p {
  padding: 0 22px 20px;
  color: var(--text-dim);
  font-size: 16px;
}

.faq-item.open .faq-a { max-height: 400px; }

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

.contact-section {
  padding: 96px 64px;
  background-color: var(--bg-2);
  border-bottom: 1px solid var(--border-soft);
}

.contact-inner { max-width: 1200px; margin: 0 auto; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 48px;
  align-items: start;
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field { display: flex; flex-direction: column; gap: 8px; }
.field-full { grid-column: 1 / -1; }

.field label { font-size: 14px; font-weight: 600; color: var(--text-dim); }

.field input,
.field textarea {
  background-color: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px 15px;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--violet);
}

.contact-form .btn { grid-column: 1 / -1; justify-self: start; }

.form-status { grid-column: 1 / -1; color: var(--green); font-size: 15px; min-height: 22px; }

.contact-aside { display: flex; flex-direction: column; gap: 18px; }

.contact-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
}

.contact-card h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.contact-card a { color: var(--amber); font-weight: 600; }
.contact-card a:hover { color: var(--amber-soft); }
.contact-card p { color: var(--text-dim); font-size: 15px; }

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

.site-footer {
  background-color: var(--bg-2);
  border-top: 1px solid var(--border-soft);
  position: relative;
  overflow: hidden;
  padding: 72px 64px 0;
}

.footer-watermark {
  position: absolute;
  bottom: -30px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: clamp(80px, 14vw, 220px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--bg-3);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.footer-inner {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-col { display: flex; flex-direction: column; gap: 10px; }

.footer-brand p { color: var(--text-dim); font-size: 15px; margin-top: 12px; max-width: 320px; }

.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.footer-col a { color: var(--text-dim); font-size: 15px; }
.footer-col a:hover { color: var(--amber); }
.footer-col p { color: var(--text-dim); font-size: 15px; }

.footer-bottom {
  position: relative;
  border-top: 1px solid var(--border-soft);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-faint);
  font-size: 14px;
  max-width: 1200px;
  margin: 0 auto;
}

/* =========================================================
   Scroll reveal
   ========================================================= */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

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

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-section { padding: 80px 40px; }
  .signal-grid { grid-template-columns: 1fr; }
  .models-table { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  :root { --nav-w: 0px; }

  .site-nav {
    width: 100%;
    height: 100vh;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .site-nav.open { transform: translateX(0); }

  .main { margin-left: 0; }

  .nav-toggle { display: flex; }

  .hero-section,
  .signal-section,
  .capabilities-section,
  .industries-section,
  .models-section,
  .process-section,
  .metrics-section,
  .faq-section,
  .contact-section {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero-section { padding-top: 96px; }
  .metrics-inner { grid-template-columns: 1fr 1fr; gap: 24px; }
  .metric-num { font-size: 38px; }
  .contact-form { grid-template-columns: 1fr; padding: 24px; }
  .cap-item { grid-template-columns: 1fr; gap: 8px; }
  .cap-num { font-size: 30px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}