:root {
  --ink: #0b1520;
  --ink-soft: #172536;
  --seed: #2f9fd8;
  --seed-deep: #1677ad;
  --neon: #5ec8ff;
  --mist: #eef5fa;
  --paper: #f5f8fb;
  --line: rgba(11, 21, 32, 0.12);
  --muted: #5a6b7c;
  --accent: #3db4ef;
  --white: #ffffff;
  --shadow: 0 24px 60px rgba(11, 21, 32, 0.14);
  --font-display: "Bricolage Grotesque", sans-serif;
  --font-body: "Figtree", sans-serif;
  --radius: 18px;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  background:
    radial-gradient(1100px 560px at 12% -8%, rgba(94, 200, 255, 0.18), transparent 58%),
    radial-gradient(900px 480px at 92% 0%, rgba(22, 119, 173, 0.12), transparent 55%),
    linear-gradient(180deg, #eef5fa 0%, var(--paper) 38%, #e8eef4 100%);
  overflow-x: hidden;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 1;
  opacity: 0.035;
  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='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 2;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 48px);
  backdrop-filter: blur(14px);
  background: rgba(245, 248, 251, 0.8);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.scrolled {
  border-bottom-color: var(--line);
  background: rgba(245, 248, 251, 0.94);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 600 0.78rem/1 var(--font-body);
  letter-spacing: 0.02em;
  padding: 7px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.lang-switch button.is-active {
  background: var(--ink);
  color: var(--white);
}

.logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.logo img {
  width: auto;
  height: 28px;
  border-radius: 6px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
}

.nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: var(--seed);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s ease;
}

.nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 10px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  transition: background 0.25s ease, color 0.25s ease;
}

.nav-cta:hover {
  background: var(--ink);
  color: var(--white);
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(40px, 7vh, 80px) clamp(20px, 4vw, 48px) 48px;
}

.hero-mark {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  margin-bottom: 18px;
  object-fit: cover;
}

.brand-lockup {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.2vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--seed-deep);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.8vw, 3.75rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
  font-weight: 800;
  max-width: 100%;
  overflow-wrap: normal;
  word-break: keep-all;
  line-break: strict;
}

.hero-lead {
  margin: 22px 0 0;
  max-width: min(42ch, 100%);
  color: var(--muted);
  font-size: clamp(0.98rem, 2.4vw, 1.05rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--ink);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--seed-deep);
}

.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

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

.hero-visual {
  min-height: 420px;
  position: relative;
}

.hero-stage {
  position: absolute;
  inset: 8% 0 8% 8%;
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(238, 245, 250, 0.4)),
    linear-gradient(180deg, #d7e8f3, #b7cfe0 55%, #8eafc4);
  overflow: hidden;
  isolation: isolate;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.45), transparent 40%),
    repeating-linear-gradient(
      -18deg,
      transparent 0 18px,
      rgba(255, 255, 255, 0.08) 18px 19px
    );
  animation: drift 14s linear infinite;
}

.dash-panel {
  position: absolute;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.dash-a {
  left: 8%;
  top: 14%;
  width: 58%;
  padding: 18px;
  animation: float-a 6.5s ease-in-out infinite;
}

.dash-b {
  right: 8%;
  bottom: 16%;
  width: 48%;
  padding: 16px;
  animation: float-b 7.5s ease-in-out infinite;
}

.dash-bar {
  height: 10px;
  width: 42%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--seed-deep), var(--neon));
  margin-bottom: 16px;
}

.dash-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.dash-grid span {
  height: 54px;
  border-radius: 12px;
  background: linear-gradient(180deg, #eef5fa, #dce8f0);
}

.dash-line {
  margin-top: 14px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), transparent 80%);
}

.flow-row {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.flow-row i {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: #d7e8f3;
  display: block;
}

.flow-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--seed-deep), var(--seed), #a8d0e8);
  margin-bottom: 14px;
  transform-origin: left;
  animation: grow 3.8s ease-in-out infinite;
}

.kpi {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--font-display);
}

.kpi b {
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.kpi em {
  font-style: normal;
  color: var(--seed-deep);
  font-size: 0.85rem;
  font-weight: 600;
}

.strip {
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
  padding: 18px clamp(20px, 4vw, 48px);
  text-align: center;
}

.strip p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(64px, 10vh, 110px) clamp(20px, 4vw, 48px);
}

.section-head {
  max-width: 640px;
  margin-bottom: 42px;
}

.section-head h2,
.vietnam-panel h2,
.contact-panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 2.8rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.section-head p,
.vietnam-panel > p,
.contact-panel > p {
  margin: 14px 0 0;
  color: var(--muted);
}

.service-list,
.pain-list,
.project-list,
.why-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.service-list li {
  background: rgba(255, 255, 255, 0.72);
  padding: 28px 26px;
}

.service-list li.wide {
  grid-column: 1 / -1;
}

.service-list h3,
.why-list h3,
.project-spotlight h3,
.upcoming h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.service-list p,
.why-list p,
.project-spotlight p,
.upcoming p {
  margin: 0;
  color: var(--muted);
}

.service-list a {
  color: var(--seed-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pain-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.pain-list li {
  padding: 24px 20px;
  border-top: 2px solid var(--seed);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(238, 246, 243, 0.5));
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: -0.02em;
  font-size: 1.15rem;
}

.pain-list span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.project-spotlight {
  padding: clamp(28px, 4vw, 42px);
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(15, 40, 64, 0.96), rgba(11, 21, 32, 0.94)),
    radial-gradient(circle at 85% 20%, rgba(94, 200, 255, 0.28), transparent 42%);
  color: #eef7ff;
  margin-bottom: 18px;
}

.project-spotlight .eyebrow,
.upcoming .eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.8;
}

.project-spotlight h3 {
  max-width: 18ch;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.project-spotlight p {
  margin-top: 14px;
  color: rgba(238, 247, 255, 0.78);
  max-width: 48ch;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.project-list li {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.65);
  font-weight: 600;
  font-size: 0.98rem;
}

.contact-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.social-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.social-links a {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  min-width: 180px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  text-align: left;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.social-links a:hover {
  border-color: var(--seed);
  transform: translateY(-2px);
}

.social-label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.why-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px 36px;
}

.why-list li {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.vietnam {
  padding-top: 0;
}

.vietnam-panel {
  padding: clamp(32px, 5vw, 56px);
  border-radius: 28px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.88), rgba(232, 241, 248, 0.92)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 24px,
      rgba(47, 159, 216, 0.06) 24px,
      rgba(47, 159, 216, 0.06) 25px
    );
  border: 1px solid var(--line);
}

.upcoming {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.contact-panel {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.site-footer {
  padding: 28px clamp(20px, 4vw, 48px) 48px;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-40px, 28px, 0); }
}

@keyframes float-a {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes float-b {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

@keyframes grow {
  0%, 100% { transform: scaleX(0.55); opacity: 0.7; }
  50% { transform: scaleX(1); opacity: 1; }
}

@media (max-width: 1100px) {
  .nav {
    gap: 14px;
  }

  .nav a {
    font-size: 0.9rem;
  }
}

@media (max-width: 960px) {
  .menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    position: fixed;
    inset: 58px 12px auto;
    z-index: 30;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: rgba(245, 248, 251, 0.98);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .nav-cta {
    text-align: center;
    margin-top: 4px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 24px 16px 40px;
  }

  .hero-visual {
    min-height: min(52vw, 280px);
    order: -1;
  }

  .hero-stage {
    inset: 0;
  }

  .hero h1 {
    font-size: clamp(1.85rem, 8vw, 2.6rem);
    line-height: 1.22;
  }

  .brand-lockup {
    font-size: clamp(1.25rem, 5vw, 1.7rem);
  }

  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-head h2,
  .vietnam-panel h2,
  .contact-panel h2 {
    font-size: clamp(1.55rem, 6vw, 2.2rem);
    word-break: keep-all;
    line-break: strict;
  }

  .pain-list,
  .project-list {
    grid-template-columns: 1fr 1fr;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .service-list li.wide {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 12px 16px;
  }

  .logo img {
    height: 24px;
  }

  .hero-mark {
    width: 36px;
    height: 36px;
  }

  .lang-switch button {
    padding: 6px 8px;
    font-size: 0.72rem;
  }

  .why-list,
  .pain-list,
  .project-list {
    grid-template-columns: 1fr;
  }

  .social-links {
    flex-direction: column;
  }

  .social-links a {
    min-width: 0;
    width: 100%;
  }

  .strip {
    padding-left: 16px;
    padding-right: 16px;
  }

  .strip p {
    letter-spacing: 0.04em;
    font-size: 0.74rem;
    line-height: 1.5;
    word-break: keep-all;
  }

  .dash-a,
  .dash-b {
    animation: none;
  }

  .vietnam-panel,
  .project-spotlight {
    padding: 24px 18px;
  }
}

@media (max-width: 420px) {
  .hero-actions,
  .contact-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .header-tools {
    gap: 10px;
  }
}