/* ============================================================
   CÔNG TY CP TƯ VẤN XÂY DỰNG LIÊN HIỆP
   Main Stylesheet — styles.css
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --color-primary: #0f3054;
  --color-primary-dark: #0a1f3e;
  --color-secondary: #1b5f8c;
  --color-accent: #c63b32;
  --color-green: #2e7d32;
  --color-amber: #f57f17;

  --color-text: #111827;
  --color-text-muted: #4b5567;
  --color-bg: #f7f9fc;
  --color-surface: #ffffff;
  --color-bg-gray: #eef2f7;
  --color-bg-dark: #0a1f3e;
  --color-border: #d4dbe8;
  --color-border-strong: #c3ccdc;

  --font-base: 'Manrope', 'Segoe UI', Arial, sans-serif;
  --font-size-sm: 0.92rem;
  --font-size-md: 1.02rem;
  --font-size-lg: 1.16rem;
  --font-size-xl: 1.42rem;
  --font-size-2xl: 1.85rem;
  --font-size-3xl: 2.35rem;
  --font-size-4xl: 3.1rem;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 34px;

  --shadow-sm: 0 2px 10px rgba(8, 31, 62, .06);
  --shadow-md: 0 8px 28px rgba(8, 31, 62, .12);
  --shadow-lg: 0 16px 46px rgba(8, 31, 62, .16);

  --transition: 0.28s ease;
  --container: 1200px;
  --header-h: 72px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 3px;
}

ul {
  list-style: none;
}

address {
  font-style: normal;
}

.skip-link {
  position: absolute;
  top: -200px;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
  transition: top 0.2s ease, box-shadow var(--transition);
  z-index: 1200;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 12px;
  box-shadow: var(--shadow-md);
}

/* ---------- Utility ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 28px;
}

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

.section {
  padding-block: 88px;
}

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

.section--dark {
  background: var(--color-bg-dark);
  color: #fff;
}

.section__header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 56px;
}

.section__eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section__eyebrow--light {
  color: #93b8e8;
}

.section__eyebrow--muted {
  color: var(--color-secondary);
}

.section__title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary-dark);
  margin-bottom: 16px;
}

.section__title--light {
  color: #fff;
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.section__cta {
  margin-top: 40px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.section__lead {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: 18px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.pill--light {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .35);
  color: #fff;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 26px 24px;
}

.grid {
  display: grid;
  gap: 20px;
}

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

.grid--three {
  grid-template-columns: repeat(3, 1fr);
}

.grid--four {
  grid-template-columns: repeat(4, 1fr);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-bg-gray);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: var(--font-size-sm);
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 16px;
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform .15s ease,
    box-shadow var(--transition);
  text-align: center;
}

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

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 90%);
  color: #fff;
  border-color: transparent;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: linear-gradient(135deg, #0d2746 0%, #163d66 90%);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: inherit;
  border-color: currentColor;
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background: rgba(12, 47, 84, .08);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.btn--full {
  width: 100%;
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: rgba(15, 48, 84, .28);
}

.btn--ghost:hover {
  background: rgba(15, 48, 84, .08);
  border-color: var(--color-primary);
}

/* Keep CTA contrast stable when buttons sit on dark surfaces. */
.hero .btn--outline,
.sub-hero .btn--outline,
.contact-banner__inner .btn--outline {
  color: #fff;
  border-color: rgba(255, 255, 255, .72);
  background: rgba(255, 255, 255, .03);
}

.hero .btn--outline:hover,
.hero .btn--outline:focus-visible,
.sub-hero .btn--outline:hover,
.sub-hero .btn--outline:focus-visible,
.contact-banner__inner .btn--outline:hover,
.contact-banner__inner .btn--outline:focus-visible {
  background: #fff;
  color: var(--color-primary-dark);
  border-color: #fff;
  box-shadow: var(--shadow-md);
}

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-h);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header__right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header__phone {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 50px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  color: var(--color-primary-dark);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all var(--transition);
}

.header__phone:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.phone-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.phone-text {
  white-space: nowrap;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 100px;
  height: 60px;
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  white-space: nowrap;
}

.logo-text--inline {
  font-size: .82rem;
}

.logo-text__main {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.logo-text__sub {
  font-size: .72rem;
  color: var(--color-primary-dark);
  letter-spacing: .02em;
  text-transform: uppercase;
}

@media (max-width: 640px) {
  .logo-text--inline {
    font-size: .72rem;
    white-space: normal;
  }
}

/* nav */
.nav__list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  padding: 8px 14px;
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary);
  background: var(--color-bg-gray);
}

.nav__link--cta {
  background: var(--color-accent);
  color: #fff !important;
  font-weight: 600;
  margin-left: 8px;
}

.nav__link--cta:hover {
  background: #a22f28;
  color: #fff !important;
}

/* hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  touch-action: manipulation;
  transition: background var(--transition), border-color var(--transition),
    box-shadow var(--transition), transform .15s ease;
}

.nav-toggle:hover {
  background: rgba(15, 48, 84, .06);
  border-color: var(--color-border);
}

.nav-toggle:focus-visible {
  background: rgba(15, 48, 84, .08);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.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 {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(10, 31, 62, .82) 0%, rgba(15, 48, 84, .72) 50%, rgba(22, 66, 110, .68) 100%),
    radial-gradient(circle at 15% 20%, rgba(255, 255, 255, .06), transparent 30%),
    radial-gradient(circle at 80% 18%, rgba(255, 255, 255, .08), transparent 36%);
  z-index: 1;
}

.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

.hero__content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 1200px;
  padding-block: 88px 124px;
}

.hero__eyebrow {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #93b8e8;
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(var(--font-size-3xl), 5.5vw, var(--font-size-4xl));
  font-weight: 700;
  line-height: 1.18;
  margin-bottom: 24px;
  text-transform: uppercase;
}

.hero__title--accent {
  color: #ffd166;
}

.hero__desc {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, .82);
  margin-bottom: 28px;
  max-width: 560px;
  line-height: 1.75;
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.hero__meta-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, .25);
  background: rgba(255, 255, 255, .08);
  color: rgba(255, 255, 255, .9);
}

.hero__meta-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.hero__meta strong {
  color: #fff;
}

.hero__meta a {
  color: #ffd166;
}

.hero__meta a:hover {
  text-decoration: underline;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 50px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}

.badge--hero {
  background: rgba(255, 255, 255, .15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, .25);
  color: #fff;
}

.badge--hero:hover {
  background: rgba(255, 255, 255, .22);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .15);
}

.badge-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 18px;
}

/* scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll-hint span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, .4);
  border-radius: 50px;
  position: relative;
}

.hero__scroll-hint span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, .6);
  border-radius: 50px;
  animation: scrollDot 2s infinite;
}

@keyframes scrollDot {
  0% {
    opacity: 1;
    top: 6px;
  }

  80% {
    opacity: 0;
    top: 20px;
  }

  100% {
    opacity: 0;
    top: 6px;
  }
}

/* ---------- SUB HERO (SUBPAGES) ---------- */
.sub-hero {
  position: relative;
  padding: calc(var(--header-h) + 50px) 0 90px;
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .08), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, .12), transparent 35%),
    linear-gradient(120deg, #0a1f3e 0%, #0f3054 60%, #16426e 100%);
  color: #fff;
  overflow: hidden;
}

.sub-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, .08), transparent 60%);
  z-index: 0;
}

.sub-hero__content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.sub-hero__title {
  font-size: clamp(var(--font-size-3xl), 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
}

.sub-hero__desc {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, .85);
  line-height: 1.75;
  max-width: 780px;
}

.sub-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.sub-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- STATS ---------- */
.stats {
  background: var(--color-primary);
  padding-block: 40px;
}

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

.stat-item__number {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: 700;
  color: #ffd166;
}

.stat-item__unit {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #ffd166;
}

.stat-item__label {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, .8);
  margin-top: 4px;
  font-weight: 500;
}

/* ---------- ABOUT ---------- */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about__visual svg {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  filter: drop-shadow(var(--shadow-lg));
}

.about__text .section__title {
  margin-top: 8px;
}

.about__lead {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 16px;
  line-height: 1.7;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.about__highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 6px 0 26px;
}

.highlight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.highlight-card h4 {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.highlight-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.about__info-list {
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about__info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
}

.info-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  fill: var(--color-primary);
  margin-top: 2px;
}

.about__info-list a:hover {
  color: var(--color-accent);
}

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

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 50px;
  font-size: var(--font-size-md);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--color-border);
  background: #fff;
  color: var(--color-primary);
  transition: background var(--transition), color var(--transition),
    border-color var(--transition), transform .15s ease,
    box-shadow var(--transition);
  text-align: center;
}

.btn-download:hover {
  background: var(--color-bg-gray);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.download-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ---------- SERVICES ---------- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: default;
}

.service-card:hover,
.service-card:focus {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  outline: none;
}

.service-card__icon svg {
  width: 72px;
  height: 72px;
  margin-bottom: 20px;
}

.service-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-card__desc {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-card__list li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-left: 18px;
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ---------- WHY US ---------- */
.why-us__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.why-card {
  padding: 32px 28px;
  background: var(--color-bg-gray);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.why-card__icon svg {
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
}

.why-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 10px;
}

.why-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------- FEATURED PROJECTS ---------- */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.project-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-card__image {
  width: 100%;
  height: auto;
  min-height: 200px;
  max-height: 260px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-bg-gray);
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__image svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__content {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.project-card__tag {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-bg-gray);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  width: fit-content;
}

.project-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.3;
}

.project-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.project-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.meta-icon {
  width: 16px;
  height: 16px;
  fill: var(--color-primary);
  flex-shrink: 0;
}

.project-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.project-card__cta:hover {
  color: var(--color-primary-dark);
}

.project-card__cta svg {
  width: 16px;
  height: 16px;
}

/* ---------- CERTIFICATIONS ---------- */
.certifications__grid {
  display: grid;
  grid-template-columns: minmax(320px, 1.45fr) repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.cert-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
}

.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.cert-card__icon {
  display: flex;
  justify-content: center;
}

.cert-card__icon svg {
  width: 80px;
  height: 80px;
  margin: 0 auto 8px;
}

.cert-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.cert-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.cert-card__list {
  margin: 0;
  padding-left: 18px;
  text-align: left;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.cert-card__list li+li {
  margin-top: 6px;
}

.cert-card__list--compact {
  padding-left: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.cert-card__list--compact li {
  margin: 0;
  padding: 13px 14px;
  border-radius: 14px;
  border: 1px solid rgba(15, 48, 84, .10);
  background: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.cert-card__list--compact li+li {
  margin-top: 0;
}

.cert-card__list-title {
  color: var(--color-primary-dark);
  font-weight: 600;
  line-height: 1.45;
}

.cert-card__list-rank {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: #e8f0fb;
  color: var(--color-primary);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1;
}

/* ---------- CAREERS ---------- */
.careers__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.career-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
}

.career-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.career-card__tag {
  padding: 6px 10px;
  border-radius: 12px;
  background: var(--color-bg-gray);
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-primary-dark);
}

.career-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.career-card__meta {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.career-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.career-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.career-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--color-accent);
  border-radius: 50%;
}

.careers__footer {
  margin-top: 28px;
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
}

.careers__note {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  max-width: 760px;
}

/* ---------- CONTACT ---------- */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact__intro {
  color: rgba(255, 255, 255, .78);
  font-size: var(--font-size-lg);
  margin-bottom: 36px;
  line-height: 1.7;
}

.contact__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.contact-card {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  color: rgba(255, 255, 255, .9);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-card a {
  color: #ffd166;
}

.contact-card a:hover {
  text-decoration: underline;
}

.contact-card__label {
  font-size: var(--font-size-sm);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #9dc3ff;
  font-weight: 700;
}

.contact-card strong {
  color: #fff;
}

.contact__address dl {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact__detail dt {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #93b8e8;
}

.detail-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  fill: #93b8e8;
}

.contact__detail dd {
  font-size: var(--font-size-md);
  color: rgba(255, 255, 255, .85);
  padding-left: 26px;
}

.contact__detail dd a {
  color: #ffd166;
}

.contact__detail dd a:hover {
  text-decoration: underline;
}

/* form */
.contact__form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
}

.contact__form-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-group label span {
  color: var(--color-accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-md);
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg-gray);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(26, 95, 168, .12);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 110px;
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  min-height: 18px;
}

.form-success {
  margin-top: 14px;
  font-size: var(--font-size-sm);
  color: var(--color-green);
  font-weight: 500;
  text-align: center;
  min-height: 20px;
}

.contact__map {
  margin-top: 26px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .1), rgba(255, 255, 255, .04)),
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, .08), transparent 40%),
    rgba(0, 0, 0, .08);
  border: 1px dashed rgba(255, 255, 255, .4);
  border-radius: var(--radius-lg);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .8);
  text-align: center;
  padding: 18px;
  font-weight: 600;
  letter-spacing: .02em;
}

/* ---------- CAPABILITY PAGE ---------- */
.capability-intro__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 30px;
  align-items: start;
}

.capability-intro__text {
  background:
    radial-gradient(circle at top right, rgba(27, 95, 140, .08), transparent 38%),
    linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid rgba(15, 48, 84, .10);
  border-radius: var(--radius-lg);
  padding: 34px 34px 30px;
  box-shadow: var(--shadow-sm);
}

.capability-intro__text .section__subtitle {
  margin-bottom: 18px;
  max-width: 60ch;
}

.capability-intro__text .pill-row {
  margin-top: 18px;
}

.focus-list {
  background: linear-gradient(180deg, #ffffff 0%, #f5f8fd 100%);
  border: 1px solid rgba(15, 48, 84, .10);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  min-height: 100%;
}

.focus-list__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 18px;
}

.focus-list ul {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.focus-list li {
  position: relative;
  padding: 16px 0 16px 18px;
  font-size: .98rem;
  color: var(--color-text);
  line-height: 1.65;
}

.focus-list li+li {
  border-top: 1px solid rgba(15, 48, 84, .10);
}

.focus-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 24px;
  width: 7px;
  height: 7px;
  background: var(--color-primary);
  border-radius: 50%;
}

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

.capability-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
}

.capability-card__tag {
  display: inline-block;
  text-align: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-bg-gray);
  color: var(--color-primary-dark);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.capability-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.capability-card__desc {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.capability-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.capability-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.capability-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--color-green);
  border-radius: 50%;
}

.capability-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.fact-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 20px 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 188px;
}

.fact-card__label {
  font-size: var(--font-size-sm);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 700;
  display: block;
}

.fact-card__value {
  font-size: clamp(1.05rem, 1.15vw, 1.26rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.35;
}

.fact-card__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid rgba(15, 48, 84, .08);
  line-height: 1.55;
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.scope-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scope-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--color-bg-gray);
  display: grid;
  place-items: center;
  color: var(--color-primary);
  font-weight: 700;
}

.scope-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.scope-card p {
  color: var(--color-text-muted);
  line-height: 1.6;
}

.scope-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.scope-card li {
  position: relative;
  padding-left: 14px;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.scope-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

.value-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 22px;
  align-items: stretch;
}

.value-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.value-panel__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.value-panel p {
  color: var(--color-text-muted);
  line-height: 1.65;
}

.value-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.value-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.value-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
}

.assurance {
  background: linear-gradient(135deg, rgba(15, 48, 84, .08), rgba(12, 47, 84, .03));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
}

.assurance__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 8px;
}

.assurance__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.assurance__item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-sm);
}

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

.process-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
}

.process-card__step {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.process-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.process-card p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.contact-banner__inner {
  background: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  box-shadow: var(--shadow-md);
}

.contact-banner__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 10px;
}

.contact-banner__desc {
  color: rgba(255, 255, 255, .85);
  font-size: var(--font-size-md);
  line-height: 1.6;
}

.contact-banner__desc a {
  color: #ffd166;
}

.contact-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

/* ---------- ORGANIZATION PAGE ---------- */
.org-diagram {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.org-node {
  text-align: center;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  color: #fff;
}

.org-node--top {
  background: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.org-node--mid {
  background: #e8f0fb;
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

.org-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
}

.org-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.org-card__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.org-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.org-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.org-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--color-primary);
  border-radius: 50%;
}

.org-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  box-shadow: var(--shadow-sm);
}

.org-legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.org-legend__card {
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.org-legend__title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.org-legend__desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.org-collab .section__header {
  margin-bottom: 40px;
}

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

.coord-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
}

.coord-card__step {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.coord-card__title {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.coord-card p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ---------- FOOTER ---------- */
.footer {
  background: #06193a;
  color: rgba(255, 255, 255, .75);
  font-size: var(--font-size-sm);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-block: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.footer__brand .header__logo {
  margin-bottom: 14px;
}

.footer__brand .logo-text__main {
  color: #fff;
}

.footer__brand .logo-text__sub {
  color: rgba(255, 255, 255, .55);
}

.footer__brand .logo-text--inline {
  color: #fff;
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, .5);
  margin-top: 6px;
}

.footer__links h4,
.footer__contact h4 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .9);
  margin-bottom: 16px;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  color: rgba(255, 255, 255, .65);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: #ffd166;
}

.footer__contact p {
  color: rgba(255, 255, 255, .65);
  margin-bottom: 8px;
  line-height: 1.6;
}

.footer__contact a {
  color: #ffd166;
}

.footer__contact a:hover {
  text-decoration: underline;
}

.footer__bottom {
  text-align: center;
  padding-block: 20px;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, .4);
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 46px;
  height: 46px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition),
    transform var(--transition), background var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

/* ---------- Animation helpers ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .6s ease, transform .6s ease;
}

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

/* ---------- DOCUMENTS PAGE ---------- */
.doc-intro__grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 28px;
  align-items: start;
}

.doc-highlights {
  display: grid;
  gap: 12px;
}

.doc-highlight {
  background: linear-gradient(140deg, #f3f7ff 0%, #ffffff 100%);
  border-color: rgba(15, 48, 84, .16);
}

.doc-section .section__header {
  margin-bottom: 26px;
}

.doc-group {
  margin-bottom: 42px;
}

.doc-group__header {
  margin-bottom: 16px;
}

.doc-group__title {
  font-size: var(--font-size-xl);
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.doc-group__desc {
  color: var(--color-text-muted);
  max-width: 760px;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.doc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
}

.doc-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.doc-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef2f7;
  color: var(--color-primary-dark);
  font-weight: 700;
  white-space: nowrap;
}

.doc-size {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.doc-card__title {
  font-size: var(--font-size-lg);
  color: var(--color-primary-dark);
  margin: 0;
}

.doc-card__desc {
  color: var(--color-text-muted);
  margin: 0;
}

.doc-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.doc-card .btn {
  font-size: var(--font-size-sm);
  padding: 10px 14px;
}

.doc-note {
  margin-top: 10px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-gray);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.doc-note a {
  color: var(--color-primary);
  text-decoration: underline;
}

/* ---------- RESPONSIVE ---------- */

/* tablet */
@media (max-width: 960px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about__visual {
    order: -1;
  }

  .about__visual svg {
    max-width: 320px;
  }

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

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

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

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

  .contact__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

  .capability-intro__grid {
    grid-template-columns: 1fr;
  }

  .capability-intro__text,
  .focus-list {
    padding: 28px 24px;
  }

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

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

  .contact-banner__inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .header__phone .phone-text {
    display: none;
  }

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

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

  .doc-intro__grid {
    grid-template-columns: 1fr;
  }

  .doc-group__title {
    font-size: var(--font-size-lg);
  }

  .doc-card__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* mobile */
@media (max-width: 640px) {
  :root {
    --header-h: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 18px 20px 24px;
    transform: translateY(-110%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    box-shadow: var(--shadow-md);
    max-height: calc(100svh - var(--header-h));
    overflow-y: auto;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .nav__link {
    display: flex;
    align-items: center;
    min-height: 50px;
    padding: 14px 18px;
    font-size: var(--font-size-md);
    border-radius: var(--radius-sm);
    line-height: 1.4;
  }

  .nav__link--cta {
    margin-left: 0;
    text-align: center;
    justify-content: center;
    margin-top: 10px;
  }

  .header__phone {
    display: none;
  }

  .header__right {
    gap: 12px;
  }

  .hero {
    min-height: 100svh;
  }

  .hero__content {
    padding-block: 48px 96px;
  }

  .section {
    padding-block: 56px;
  }

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

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

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

  .why-us__grid {
    grid-template-columns: 1fr;
  }

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

  .cert-card--featured .cert-card__list--compact {
    grid-template-columns: 1fr;
  }

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

  .footer__inner {
    grid-template-columns: 1fr;
    padding-block: 40px;
  }

  .contact__form {
    padding: 28px 24px;
  }

  .careers__grid,
  .capability-grid,
  .process__grid,
  .org-grid,
  .coord-grid,
  .scope-grid {
    grid-template-columns: 1fr;
  }

  .capability-intro__grid {
    gap: 24px;
  }

  .capability-facts {
    grid-template-columns: 1fr;
  }

  .fact-card {
    min-height: 0;
  }

  .contact-banner__inner {
    padding: 24px;
  }

  .sub-hero {
    padding: calc(var(--header-h) + 30px) 0 64px;
  }

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

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

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

  .doc-card__actions .btn {
    flex: 1 1 100%;
  }
}

@media (max-width: 400px) {
  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}