/* ============================================================
   ChunPu — Computer Systems Design
   Palette: Evergreen & Terracotta on Ivory
   ============================================================ */

:root {
  --ink: #1d1a15;
  --ink-soft: #5c564c;
  --ink-faint: #7d7466;
  --bg: #f7f3eb;
  --bg-2: #efe9dc;
  --surface: #ffffff;
  --surface-2: #fbf8f1;
  --evergreen: #14543f;
  --evergreen-deep: #0c3a2c;
  --evergreen-dark: #0b2b21;
  --accent: #b3542e;
  --accent-bright: #d06a3d;
  --accent-soft: #f4e1d4;
  --line: #e2dacb;
  --line-strong: #d4c9b4;
  --white: #ffffff;
  --evergreen-text: #e9f0ea;
  --evergreen-muted: #bcd0c4;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-size: 16px;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  line-height: 1.15;
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 5vw, 3.9rem); }
h2 { font-size: clamp(1.9rem, 3.5vw, 2.7rem); }
h3 { font-size: 1.35rem; }

p { color: var(--ink-soft); }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--evergreen); }

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 96px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background-color: var(--accent);
}

.section-title {
  margin-top: 18px;
  max-width: 760px;
}

.section-lead {
  margin-top: 20px;
  max-width: 640px;
  font-size: 1.1rem;
}

/* ============================================================
   Utility bar + Masthead navigation
   ============================================================ */

.utility-bar {
  background-color: var(--evergreen-dark);
  color: var(--evergreen-muted);
  font-size: 0.82rem;
}

.utility-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.utility-inner a { color: var(--evergreen-text); font-weight: 600; }
.utility-inner a:hover { color: var(--accent-bright); }

.utility-left { display: flex; gap: 22px; flex-wrap: wrap; }
.utility-right { display: flex; gap: 18px; }

.masthead-main {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg);
  border-bottom: 1px solid var(--line);
}

.masthead-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-family: Georgia, serif;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--evergreen);
  line-height: 1;
}

.brand span { color: var(--accent); }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 34px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.25s ease;
}

.main-nav a:hover { color: var(--accent); }
.main-nav a:hover::after { width: 100%; }

.masthead-cta {
  display: inline-block;
  background-color: var(--evergreen);
  color: var(--white);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 12px 22px;
  border-radius: 6px;
  transition: background-color 0.2s ease;
  white-space: nowrap;
}

.masthead-cta:hover { background-color: var(--evergreen-deep); color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--evergreen);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

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

.hero-section {
  position: relative;
  background-color: var(--bg);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
  padding: 96px 0 88px;
}

.hero-eyebrow {
  display: inline-block;
  background-color: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 8px 16px;
  border-radius: 999px;
}

.hero-title {
  margin-top: 24px;
}

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

.hero-text {
  margin-top: 26px;
  font-size: 1.15rem;
  max-width: 540px;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 15px 28px;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--white);
}
.btn-primary:hover { background-color: var(--accent-bright); color: var(--white); }

.btn-outline {
  background-color: transparent;
  color: var(--evergreen);
  border: 2px solid var(--evergreen);
}
.btn-outline:hover { background-color: var(--evergreen); color: var(--white); }

.hero-note {
  margin-top: 30px;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.hero-note strong { color: var(--ink); display: block; font-size: 1.05rem; }

/* Terminal visual */
.terminal {
  background-color: var(--evergreen-dark);
  border-radius: 14px;
  box-shadow: 0 24px 60px -20px #1d1a15;
  overflow: hidden;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background-color: #0a2019;
  border-bottom: 1px solid #1e3a30;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background-color: #e05a4f; }
.terminal-dot.amber { background-color: #d9a43b; }
.terminal-dot.green { background-color: #3aa86b; }

.terminal-title {
  margin-left: 10px;
  font-size: 0.8rem;
  color: var(--evergreen-muted);
}

.terminal-body {
  padding: 26px 24px;
  font-size: 0.88rem;
  line-height: 1.9;
}

.t-line { white-space: pre-wrap; }
.t-cmd { color: var(--evergreen-text); }
.t-green { color: #6fc98f; }
.t-amber { color: #e6b95c; }
.t-muted { color: #7f968c; }
.t-accent { color: #e8906b; }

.terminal-badge {
  display: inline-block;
  margin-top: 18px;
  background-color: #123127;
  color: var(--evergreen-text);
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
}

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

.metrics-strip {
  background-color: var(--evergreen);
  color: var(--evergreen-text);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 46px 0;
}

.metric {
  border-left: 3px solid var(--accent-bright);
  padding-left: 20px;
}

.metric-value {
  font-family: Georgia, serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.metric-label {
  margin-top: 8px;
  font-size: 0.92rem;
  color: var(--evergreen-muted);
}

/* ============================================================
   Services ledger
   ============================================================ */

.services-section { background-color: var(--surface); }

.service-row {
  display: grid;
  grid-template-columns: 110px 1fr 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

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

.service-num {
  font-family: Georgia, serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--line-strong);
}

.service-name {
  font-family: Georgia, serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
}

.service-desc { color: var(--ink-soft); font-size: 0.98rem; }

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.service-tags span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--evergreen);
  background-color: var(--bg-2);
  padding: 6px 12px;
  border-radius: 999px;
}

/* ============================================================
   Process timeline
   ============================================================ */

.process-section { background-color: var(--bg-2); }

.timeline {
  margin-top: 60px;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background-color: var(--line-strong);
}

.timeline-item {
  position: relative;
  padding-left: 78px;
  padding-bottom: 52px;
}

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

.timeline-dot {
  position: absolute;
  left: 0;
  top: 2px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--evergreen);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Georgia, serif;
  font-weight: 700;
  font-size: 1.15rem;
}

.timeline-step {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.timeline-title { margin-top: 8px; font-size: 1.45rem; }

.timeline-text { margin-top: 12px; max-width: 640px; }

/* ============================================================
   Stack
   ============================================================ */

.stack-section { background-color: var(--surface); }

.stack-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stack-card {
  background-color: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 24px;
}

.stack-card h3 {
  font-size: 1.05rem;
  color: var(--evergreen);
  margin-bottom: 14px;
}

.stack-card ul { list-style: none; }
.stack-card li {
  font-size: 0.92rem;
  color: var(--ink-soft);
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
.stack-card li:last-child { border-bottom: none; }

/* ============================================================
   Why ChunPu (split)
   ============================================================ */

.why-section { background-color: var(--bg); }

.why-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  align-items: center;
}

.why-visual {
  background-color: var(--evergreen);
  border-radius: 16px;
  padding: 46px 40px;
  color: var(--evergreen-text);
}

.why-visual h3 {
  color: var(--white);
  font-size: 1.7rem;
  margin-bottom: 26px;
}

.why-point {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid #1f4438;
}

.why-point:last-child { border-bottom: 1px solid #1f4438; }

.why-check {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--accent-bright);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.why-point p { color: var(--evergreen-muted); font-size: 0.95rem; }
.why-point strong { color: var(--white); display: block; font-size: 1.05rem; }

.why-standout {
  margin-top: 30px;
  background-color: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 24px 26px;
}

.why-standout p { color: var(--ink-soft); font-size: 1.05rem; }
.why-standout strong { color: var(--ink); }

/* ============================================================
   Testimonial
   ============================================================ */

.testimonial-section {
  background-color: var(--evergreen-dark);
  color: var(--evergreen-text);
}

.testimonial-section .eyebrow { color: var(--accent-bright); }
.testimonial-section .eyebrow::before { background-color: var(--accent-bright); }

.quote-mark {
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
  color: var(--accent-bright);
}

.quote-text {
  font-family: Georgia, serif;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.35;
  color: var(--white);
  max-width: 900px;
  margin-top: 8px;
}

.quote-attribution {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.quote-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--accent-bright);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.quote-who strong { color: var(--white); display: block; }
.quote-who span { color: var(--evergreen-muted); font-size: 0.9rem; }

/* ============================================================
   CTA band
   ============================================================ */

.cta-section { background-color: var(--accent); }

.cta-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-section h2 { color: var(--white); }
.cta-section p { color: #f7e2d6; margin-top: 12px; max-width: 520px; }

.btn-light {
  background-color: var(--white);
  color: var(--accent);
}
.btn-light:hover { background-color: var(--evergreen); color: var(--white); }

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

.contact-section { background-color: var(--bg-2); }

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  margin-top: 48px;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line-strong);
}

.contact-info-item:last-child { border-bottom: 1px solid var(--line-strong); }

.contact-info-item .icon {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background-color: var(--evergreen);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.contact-info-item strong { display: block; color: var(--ink); }
.contact-info-item span { color: var(--ink-soft); font-size: 0.95rem; }
.contact-info-item a { color: var(--ink-soft); }
.contact-info-item a:hover { color: var(--accent); }

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-field { margin-bottom: 18px; }

.form-field label {
  display: block;
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 8px;
  color: var(--ink);
}

.form-field input,
.form-field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 0.98rem;
  color: var(--ink);
  background-color: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 13px 15px;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--white);
}

.form-note { font-size: 0.85rem; color: var(--ink-faint); margin-top: 6px; }

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

.footer {
  background-color: var(--evergreen-dark);
  color: var(--evergreen-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 44px;
  padding: 72px 0 48px;
}

.footer-brand {
  font-family: Georgia, serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.footer-brand span { color: var(--accent-bright); }

.footer-about { margin-top: 18px; max-width: 320px; font-size: 0.95rem; }

.footer-col h4 {
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 12px; }

.footer-col a { color: var(--evergreen-muted); font-size: 0.95rem; }
.footer-col a:hover { color: var(--accent-bright); }

.footer-bottom {
  border-top: 1px solid #17402f;
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.88rem;
}

.footer-legal { display: flex; gap: 24px; }
.footer-legal a { color: var(--evergreen-muted); }
.footer-legal a:hover { color: var(--accent-bright); }

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

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

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .service-row { grid-template-columns: 70px 1fr 1fr; }
  .service-tags { justify-content: flex-start; grid-column: 2 / -1; }
}

@media (max-width: 760px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }

  .utility-inner { padding: 8px 20px; justify-content: center; }
  .utility-right { display: none; }

  .masthead-inner { padding: 14px 20px; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 18px 20px 26px;
  }

  .main-nav.open { display: block; }

  .main-nav ul { flex-direction: column; gap: 6px; }
  .main-nav a { display: block; padding: 12px 0; font-size: 1.05rem; }

  .masthead-cta { display: none; }
  .nav-toggle { display: flex; }

  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .service-row { grid-template-columns: 1fr; gap: 14px; }
  .service-tags { grid-column: auto; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .timeline::before { left: 19px; }
  .timeline-item { padding-left: 60px; }
  .timeline-dot { width: 40px; height: 40px; font-size: 1rem; }
}