:root {
  --ink: #102723;
  --muted: #526b66;
  --paper: #ffffff;
  --soft: #f3f8f6;
  --line: #d7e5df;
  --green: #0d896f;
  --teal: #0b6374;
  --blue: #225d9a;
  --gold: #b57915;
  --red: #b93a3a;
  --shadow: 0 18px 42px rgba(17, 67, 55, 0.12);
  --radius: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Hind Siliguri", "Inter", system-ui, sans-serif;
  color: var(--ink);
  background: #eef5f2;
  line-height: 1.55;
}

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

.svg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.top-strip {
  background: #083f4a;
  color: #e9fffa;
  font-size: 0.92rem;
}

.top-strip .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 36px;
  flex-wrap: wrap;
}

.top-strip span { color: #cbe7df; }

header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
}

.brand-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid #cfe0da;
  border-radius: var(--radius);
  padding: 4px;
  flex: 0 0 auto;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.25;
}

.brand span {
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  color: #234843;
  font-weight: 600;
  font-size: 0.95rem;
  flex-wrap: wrap;
}

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

.lang-switch {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.lang-switch button {
  border: 0;
  background: transparent;
  padding: 8px 11px;
  font-weight: 700;
  cursor: pointer;
  color: var(--muted);
}

.lang-switch button.active {
  color: #fff;
  background: var(--green);
}

.hero {
  min-height: 630px;
  display: grid;
  align-items: end;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(5, 39, 46, 0.93) 0%, rgba(9, 83, 81, 0.76) 46%, rgba(10, 102, 89, 0.5) 100%),
    url("../landing_img/bteb_public_service_tech_hero.png");
  background-size: cover;
  background-position: center;
}

.hero-inner {
  padding: 72px 0 44px;
}

.hero-content {
  max-width: 820px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  color: #ebfffb;
  font-weight: 700;
  margin-bottom: 18px;
}

h1 {
  margin: 0;
  font-size: clamp(2.45rem, 6vw, 5rem);
  line-height: 1.02;
  letter-spacing: 0;
  max-width: 780px;
}

.lead {
  margin: 22px 0 28px;
  color: #e4f4ef;
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  max-width: 760px;
}

.hero-actions, .quick-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 11px 16px;
  border-radius: var(--radius);
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(8, 53, 47, 0.16);
}

.btn-primary {
  color: #fff;
  background: #0c8a71;
  border-color: #0c8a71;
}

.btn-light {
  color: #073f42;
  background: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
  color: var(--teal);
  background: #f7fffc;
  border-color: #bcd8d0;
}

.hero-summary {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(255, 255, 255, 0.95);
  color: var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.summary-item {
  padding: 18px;
  border-right: 1px solid var(--line);
}

.summary-item:last-child { border-right: 0; }

.summary-item strong {
  display: block;
  font-size: 1.35rem;
  color: var(--green);
}

.summary-item span {
  display: block;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 600;
}

section {
  padding: 70px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.45rem);
  letter-spacing: 0;
  line-height: 1.15;
}

.section-head p {
  max-width: 600px;
  color: var(--muted);
  margin: 8px 0 0;
  font-size: 1.02rem;
}

.surface {
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.notice-section {
  background: #f6faf8;
}

.notice-section .section-head .btn {
  flex: 0 0 auto;
}

.official-notice-panel {
  padding: 22px;
  display: grid;
  gap: 16px;
}

.notice-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.94rem;
}

.notice-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 11px;
  border-radius: var(--radius);
  color: #fff;
  background: var(--green);
  font-weight: 800;
}

.bteb-notice-list {
  display: grid;
  gap: 10px;
}

.notice-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 16px;
  align-items: start;
  padding: 14px;
  border: 1px solid #d7e5df;
  border-radius: var(--radius);
  background: #fff;
}

.notice-item time {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  border-radius: var(--radius);
  color: #0b6374;
  background: #e8f4f0;
  font-family: "Inter", "Hind Siliguri", sans-serif;
  font-weight: 800;
  white-space: nowrap;
}

.notice-item h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.45;
}

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

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 24px rgba(21, 69, 59, 0.07);
}

.audience-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--green);
  flex: 0 0 auto;
}

.icon svg,
.service-icon svg,
.info-icon svg,
.support-icon svg,
.step-number svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.icon img {
  width: 30px;
  height: 30px;
  object-fit: contain;
  display: block;
}

.icon.logo-icon {
  background: #fff;
  border: 1px solid #d9e6e0;
}

.icon.blue { background: var(--blue); }
.icon.gold { background: var(--gold); }

.audience-card h3 {
  margin: 0;
  font-size: 1.28rem;
}

.audience-card p {
  margin: 0;
  color: var(--muted);
}

.audience-link {
  margin-top: auto;
  align-self: flex-start;
}

.audience-actions {
  margin-top: auto;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.audience-actions .audience-link {
  margin-top: 0;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 9px;
}

.link-list li {
  display: flex;
  align-items: start;
  gap: 9px;
  color: #244641;
  font-weight: 600;
}

.link-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  margin-top: 9px;
  flex: 0 0 auto;
}

.service-toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.service-toolbar input {
  min-height: 46px;
  flex: 1 1 280px;
  border: 1px solid #c8d9d3;
  border-radius: var(--radius);
  padding: 0 14px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.segments {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  flex-wrap: wrap;
}

.segments button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 11px 14px;
  font-weight: 800;
  cursor: pointer;
}

.segments button.active {
  background: #0b6374;
  color: #fff;
}

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

.service-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 245px;
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: #0b6374;
  background: #e9f6f4;
  border: 1px solid #cce3dc;
}

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

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: var(--radius);
  background: #e9f5f1;
  color: #0b6e5c;
  font-weight: 800;
  font-size: 0.86rem;
}

.status {
  color: #176f36;
  font-weight: 800;
  font-size: 0.92rem;
}

.service-card h3 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.25;
}

.service-card p {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.process-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 18px;
  align-items: start;
}

.notice-panel {
  padding: 24px;
  background: #0b6374;
  color: #fff;
}

.notice-panel h3 {
  margin: 0 0 12px;
  font-size: 1.45rem;
}

.notice-panel p {
  margin: 0 0 18px;
  color: #dff4ef;
}

.notice-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.notice-list li {
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

.steps {
  display: grid;
  gap: 12px;
}

.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 18px;
}

.step-number {
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  background: #e8f4f0;
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Inter", sans-serif;
  font-weight: 800;
  position: relative;
}

.step-number::after {
  content: attr(data-step);
  position: absolute;
  right: -5px;
  top: -5px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--green);
  font-size: 0.72rem;
  border: 2px solid #fff;
}

.step h3 {
  margin: 0 0 4px;
  font-size: 1.08rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.info-card {
  padding: 20px;
}

.info-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  color: #0b6374;
  background: #e8f4f0;
}

.info-card strong {
  display: block;
  font-size: 1.04rem;
  margin-bottom: 8px;
}

.info-card p {
  margin: 0;
  color: var(--muted);
}

.support-band {
  background: #102723;
  color: #fff;
  padding: 46px 0;
}

.support-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 14px;
  align-items: stretch;
}

.support-title {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.support-title h2 {
  margin: 0 0 8px;
  font-size: 1.75rem;
}

.support-title p {
  margin: 0;
  color: #d7e7e3;
}

.support-card {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.support-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.support-label {
  display: block;
  color: #b5d3ca;
  font-weight: 700;
  margin-bottom: 8px;
}

.support-card strong {
  display: block;
  font-size: 1.12rem;
}

.support-card a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

details {
  padding: 18px;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  color: var(--muted);
  margin: 12px 0 0;
}

footer {
  background: #061d22;
  color: #cfe1dc;
  padding: 24px 0;
}

footer .container {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.hidden { display: none !important; }

@media (max-width: 980px) {
  .hero-summary, .audience-grid, .services-grid, .info-grid, .support-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 720px) {
  .top-strip .container, .nav, .section-head, footer .container {
    align-items: flex-start;
    flex-direction: column;
  }

  .brand { min-width: 0; }
  .nav-links { justify-content: flex-start; }
  .hero { min-height: 720px; }
  .hero-summary, .audience-grid, .services-grid, .info-grid, .support-grid, .faq-grid {
    grid-template-columns: 1fr;
  }

  .notice-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .notice-item time {
    justify-content: flex-start;
    width: fit-content;
    padding: 0 10px;
  }

  .summary-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .summary-item:last-child { border-bottom: 0; }
}