/* =========================================================
   Fu Hu — Computer Systems Design and Related Services
   Dark theme · emerald/mint accent
   ========================================================= */

:root {
  --bg: #0B0F0D;
  --bg-2: #0E1410;
  --surface: #141C17;
  --surface-2: #1A231D;
  --border: #26322B;
  --border-soft: #1D2721;
  --text: #EDF2EE;
  --muted: #9AA79F;
  --muted-2: #76837C;
  --accent: #3BD98F;
  --accent-strong: #22C37E;
  --accent-soft: #164E36;
  --lime: #B8E986;
  --on-accent: #07130D;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

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

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

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

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

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============ NAVIGATION (split: CTA left, links center, logo right) ============ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  padding: 16px 40px;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border-soft);
}

.nav-left {
  justify-self: start;
}

.nav-cta {
  display: inline-block;
  padding: 9px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-accent);
  background-color: var(--accent);
  border-radius: 999px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background-color: var(--lime);
  transform: translateY(-1px);
}

.nav-links {
  justify-self: center;
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-logo {
  justify-self: end;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text);
  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); }

/* ============ HERO ============ */
.hero-section {
  padding: 150px 0 80px;
  background:
    radial-gradient(900px 500px at 85% -10%, #16332A 0%, transparent 60%),
    radial-gradient(700px 420px at 0% 20%, #10201A 0%, transparent 55%),
    var(--bg);
}

.hero-kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 22px;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  max-width: 14ch;
  margin-bottom: 26px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 620px;
  margin-bottom: 60px;
}

/* Quote slider */
.quote-slider {
  position: relative;
  border-top: 1px solid var(--border);
  padding-top: 40px;
}

.quote-track {
  position: relative;
  min-height: 150px;
}

.quote-slide {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  pointer-events: none;
}

.quote-slide.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  position: relative;
}

.quote-text {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 500;
  line-height: 1.35;
  color: var(--text);
  max-width: 820px;
  margin-bottom: 22px;
}

.quote-text::before {
  content: "";
  display: inline-block;
  width: 34px;
  height: 3px;
  background-color: var(--accent);
  margin-right: 16px;
  vertical-align: middle;
}

.quote-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.quote-name {
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

.quote-org {
  font-size: 0.85rem;
  color: var(--muted-2);
}

.slider-controls {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 34px;
}

.slider-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background-color: var(--surface);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.slider-btn:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.slider-dots {
  display: flex;
  gap: 8px;
}

.slider-dots button {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: none;
  background-color: var(--border);
  cursor: pointer;
  padding: 0;
  transition: background-color 0.2s ease, width 0.2s ease;
}

.slider-dots button.active {
  background-color: var(--accent);
  width: 26px;
  border-radius: 5px;
}

/* ============ STATEMENT (full-width row) ============ */
.statement-section {
  padding: 70px 0 90px;
  border-top: 1px solid var(--border-soft);
  background-color: var(--bg-2);
}

.statement-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted-2);
  margin-bottom: 22px;
}

.statement-text {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.6rem, 3.6vw, 2.7rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 21ch;
}

.statement-text strong {
  color: var(--accent);
  font-weight: 600;
}

/* ============ SECTION HEAD ============ */
.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 24px;
  margin-bottom: 54px;
  align-items: baseline;
}

.section-index {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
}

.section-lede {
  grid-column: 2;
  color: var(--muted);
  max-width: 560px;
  font-size: 1.02rem;
}

/* ============ CAPABILITIES ============ */
.capabilities-section {
  padding: 90px 0;
  background-color: var(--bg);
}

.cap-list {
  list-style: none;
  counter-reset: cap;
}

.cap-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  padding: 34px 0;
  border-top: 1px solid var(--border);
  align-items: start;
}

.cap-item:last-child {
  border-bottom: 1px solid var(--border);
}

.cap-num {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--muted-2);
  line-height: 1;
  transition: color 0.3s ease;
}

.cap-item:hover .cap-num {
  color: var(--accent);
}

.cap-body h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.cap-body p {
  color: var(--muted);
  max-width: 640px;
}

/* ============ PROCESS ============ */
.process-section {
  padding: 90px 0;
  background-color: var(--bg-2);
  border-top: 1px solid var(--border-soft);
}

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

.process-step {
  background-color: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  padding: 30px 26px;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.process-step:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.process-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--accent-soft);
  color: var(--accent);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.process-step h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.process-step p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ============ METRICS ============ */
.metrics-section {
  padding: 70px 0;
  background-color: var(--surface-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.metric {
  text-align: center;
}

.metric-value {
  font-family: "Space Grotesk", sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

.metric-suffix {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}

.metric-label {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ============ WORK ============ */
.work-section {
  padding: 90px 0;
  background-color: var(--bg);
}

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

.work-row {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 40px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  align-items: center;
}

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

.work-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  background-color: var(--accent-soft);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.work-text h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.work-text p {
  color: var(--muted);
  max-width: 680px;
}

.work-stat {
  text-align: right;
}

.work-stat-value {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.03em;
  line-height: 1;
}

.work-stat-label {
  display: block;
  margin-top: 8px;
  color: var(--muted-2);
  font-size: 0.9rem;
}

/* ============ INSIGHTS (FAQ) ============ */
.insights-section {
  padding: 90px 0;
  background-color: var(--bg-2);
  border-top: 1px solid var(--border-soft);
}

.faq-list {
  max-width: 820px;
}

.faq-item {
  border-top: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.faq-icon {
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer p {
  color: var(--muted);
  padding-bottom: 22px;
  max-width: 720px;
}

/* ============ CONTACT ============ */
.contact-section {
  padding: 90px 0;
  background: radial-gradient(800px 500px at 100% 0%, #10281D 0%, transparent 55%), var(--bg);
  border-top: 1px solid var(--border-soft);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: start;
}

.contact-info .section-index {
  display: block;
  margin-bottom: 16px;
}

.contact-copy {
  color: var(--muted);
  margin: 20px 0 34px;
  max-width: 460px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--accent);
}

.contact-address {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-top: 10px;
}

.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 18px;
  padding: 36px;
}

.contact-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 7px;
  padding: 13px 15px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background-color: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.2s ease;
}

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

.contact-form textarea {
  resize: vertical;
}

.form-submit {
  width: 100%;
  padding: 15px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--on-accent);
  background-color: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.form-submit:hover {
  background-color: var(--lime);
  transform: translateY(-1px);
}

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--accent);
  min-height: 1.4em;
}

/* ============ FOOTER ============ */
.site-footer {
  background-color: var(--bg);
  border-top: 1px solid var(--border);
}

.footer-newsletter {
  padding: 60px 0;
  background-color: var(--bg-2);
  border-bottom: 1px solid var(--border-soft);
}

.newsletter-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.newsletter-sub {
  color: var(--muted);
  margin-bottom: 24px;
}

.newsletter-form {
  display: flex;
  gap: 12px;
  max-width: 460px;
}

.newsletter-form input {
  flex: 1;
  padding: 13px 15px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.newsletter-form input:focus {
  outline: none;
  border-color: var(--accent);
}

.newsletter-form button {
  padding: 13px 24px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--on-accent);
  background-color: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.newsletter-form button:hover {
  background-color: var(--lime);
}

.footer-main {
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand .nav-logo {
  font-size: 1.8rem;
  display: inline-block;
  margin-bottom: 14px;
}

.footer-tag {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 260px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted-2);
  margin-bottom: 6px;
}

.footer-col a {
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid var(--border-soft);
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--muted-2);
}

.footer-mark {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.1em;
  color: var(--border) !important;
}

/* ============ SCROLL REVEAL ============ */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-ready .reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .site-nav {
    grid-template-columns: auto 1fr auto;
    padding: 14px 24px;
  }

  .nav-left {
    justify-self: start;
  }

  .nav-cta {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 10px 24px 22px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 13px 0;
    border-top: 1px solid var(--border-soft);
    font-size: 1.05rem;
  }

  .nav-toggle {
    display: flex;
    justify-self: end;
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding: 120px 0 60px;
  }

  .cap-item {
    grid-template-columns: 60px 1fr;
    gap: 16px;
  }

  .cap-num {
    font-size: 1.5rem;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .metric-row {
    grid-template-columns: 1fr 1fr;
    gap: 32px 16px;
  }

  .work-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .work-stat {
    text-align: left;
  }

  .section-head {
    grid-template-columns: 1fr;
  }

  .section-lede {
    grid-column: 1;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom .container {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}