:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --text: #172033;
  --muted: #5c6b82;
  --primary: #155eef;
  --primary-dark: #0f3fa8;
  --accent: #13c296;
  --border: #dbe4f0;
  --shadow: 0 10px 28px rgba(21, 37, 75, 0.08);
  --radius-lg: 22px;
  --radius-md: 14px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Noto Sans Bengali",
    "Hind Siliguri",
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, #dbeafe 0, transparent 34rem), var(--bg);
  line-height: 1.45;
}

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

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(246, 248, 252, 0.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(219, 228, 240, 0.72);
}

.nav {
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.55rem;
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  font-size: 0.82rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 12px 28px rgba(21, 94, 239, 0.28);
}

.nav-links {
  gap: 0.5rem;
}

.nav-links a {
  padding: 0.38rem 0.62rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--primary-dark);
  background: var(--surface-soft);
  outline: none;
}

.hero {
  padding: 1.45rem 0 1rem;
}

.hero-grid,
.roadmap-grid {
  display: grid;
  gap: 0.85rem;
  align-items: center;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
}

.roadmap-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
}

.hero-copy {
  display: grid;
  gap: 0;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.42rem;
  font-size: clamp(2rem, 4.8vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.065em;
}

h2 {
  margin-bottom: 0.4rem;
  font-size: clamp(1.25rem, 2.2vw, 1.375rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.tagline {
  margin-bottom: 0.5rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.description,
.section-heading p,
.roadmap p,
.language-panel p,
.detail-description {
  color: var(--muted);
  font-size: 0.875rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 0.75rem;
}

.button,
.text-button {
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0.48rem 0.85rem;
  font-size: 0.875rem;
  white-space: nowrap;
  border-radius: 999px;
}

.primary {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 16px 34px rgba(21, 94, 239, 0.25);
}

.secondary {
  color: var(--primary-dark);
  background: #fff;
  border: 1px solid var(--border);
}

.language-panel,
.hero-image-card,
.detail-card,
.outcome-card,
.category-card,
.learning-card,
.roadmap-list {
  border: 1px solid rgba(219, 228, 240, 0.9);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.language-panel,
.detail-card {
  border-radius: var(--radius-lg);
  padding: clamp(0.85rem, 2.2vw, 1rem);
}

.language-panel {
  margin-top: 0.75rem;
}

.hero-image-card {
  position: relative;
  width: min(100%, 380px);
  align-self: center;
  justify-self: end;
  overflow: hidden;
  border-radius: calc(var(--radius-lg) + 8px);
  padding: clamp(0.45rem, 1.2vw, 0.65rem);
}

.hero-image-card::before {
  content: "";
  position: absolute;
  inset: auto -15% -24% 12%;
  height: 46%;
  border-radius: 999px;
  background: linear-gradient(
    135deg,
    rgba(21, 94, 239, 0.18),
    rgba(19, 194, 150, 0.2)
  );
  filter: blur(8px);
}

.hero-image-frame {
  position: relative;
  display: grid;
  aspect-ratio: 4 / 5;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #eaf2ff, #f8fbff 50%, #e9fff8);
}

.hero-image-frame img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: cover;
  object-position: center top;
}

.hero-image-caption {
  width: 100%;
  margin: 8px auto 0;
  color: inherit;
  font-size: 14px;
  line-height: 1.35;
  text-align: center;
}

.hero-image-placeholder {
  display: grid;
  width: 100%;
  min-height: 240px;
  place-items: center;
  padding: 1rem;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.72);
  font-size: clamp(1.2rem, 4vw, 1.9rem);
  font-weight: 900;
  text-align: center;
}

.panel-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 0.5rem;
  border-radius: 14px;
  background: var(--surface-soft);
  font-size: 1rem;
}

.language-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
  margin-top: 0.65rem;
}

.language-options label {
  position: relative;
}

.language-options input {
  position: absolute;
  opacity: 0;
}

.language-options span {
  display: block;
  padding: 0.55rem 0.7rem;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #fff;
  color: var(--muted);
  font-weight: 800;
  text-align: center;
  cursor: pointer;
}

.language-options input:checked + span {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
}

.section {
  padding: 1.15rem 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 0.55rem;
}

.compact-section {
  padding-top: 0.95rem;
}

.compact-heading {
  margin-bottom: 0.55rem;
}

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.outcome-card {
  min-height: 58px;
  padding: 0.68rem 0.8rem;
  border-radius: var(--radius-md);
  color: var(--primary-dark);
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.outcome-card:hover,
.outcome-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(21, 94, 239, 0.35);
  box-shadow: 0 18px 50px rgba(21, 37, 75, 0.14);
  outline: none;
}

.outcome-status {
  display: inline-flex;
  margin: 0.75rem 0 0;
  padding: 0.5rem 0.8rem;
  font-size: 0.875rem;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-weight: 900;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.category-card {
  min-height: 132px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.82rem;
  border-radius: var(--radius-md);
  text-align: left;
  color: inherit;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.category-card:hover,
.category-card:focus-visible {
  transform: translateY(-5px);
  border-color: rgba(21, 94, 239, 0.35);
  box-shadow: 0 28px 80px rgba(21, 37, 75, 0.16);
  outline: none;
}

.category-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 14px;
  background: linear-gradient(135deg, #eff6ff, #ecfdf5);
  font-size: 1rem;
}

.category-title {
  font-size: 1rem;
  font-weight: 900;
}

.category-description {
  color: var(--muted);
  font-size: 0.8125rem;
}


.learning-hub {
  scroll-margin-top: 66px;
}

.learning-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.learning-card {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.88rem;
  border-radius: var(--radius-md);
}

.learning-card h3 {
  margin: 0;
  color: var(--primary-dark);
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.learning-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8125rem;
}

.learning-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: 0.8125rem;
  font-weight: 900;
}

.learning-link:hover,
.learning-link:focus-visible {
  box-shadow: 0 12px 28px rgba(21, 94, 239, 0.22);
  outline: none;
}

.detail-section {
  background: linear-gradient(
    180deg,
    rgba(238, 244, 255, 0.8),
    rgba(246, 248, 252, 0)
  );
}

.hidden {
  display: none;
}

.text-button {
  margin-bottom: 0.7rem;
  padding: 0.5rem 0;
  color: var(--primary);
  background: transparent;
  font-size: 0.875rem;
}

.detail-card {
  max-width: 820px;
}

.detail-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
  margin: 0.75rem 0 0;
}

.detail-meta div {
  padding: 0.65rem;
  border-radius: 18px;
  background: var(--surface-soft);
}

.detail-meta dt {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.detail-meta dd {
  margin: 0.25rem 0 0;
  color: var(--primary-dark);
  font-size: 1rem;
  font-weight: 900;
}

.roadmap {
  background: #0b1220;
  color: #fff;
}

.roadmap .eyebrow,
.roadmap p {
  color: #b9cdfb;
}

.roadmap-list {
  display: grid;
  gap: 0.65rem;
  padding: 0.65rem;
  border-color: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.roadmap-list span {
  padding: 0.65rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.1);
  font-weight: 800;
}

.site-footer {
  padding: 0.8rem 0;
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  font-size: 0.875rem;
}

.footer-credit,
.footer-links {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--primary-dark);
  font-weight: 800;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--primary);
  text-decoration: underline;
  outline: none;
}

.footer-content p {
  margin: 0;
}

@media (max-width: 900px) {
  .hero-grid,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .hero-image-card {
    justify-self: center;
  }

  .category-grid,
  .learning-grid,
  .outcome-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: clamp(2rem, 10vw, 2.25rem);
    letter-spacing: -0.055em;
  }

  h2 {
    font-size: 1.25rem;
  }

  .tagline {
    font-size: 0.9375rem;
  }

  .description,
  .section-heading p,
  .roadmap p,
  .language-panel p,
  .detail-description,
  .category-description {
    font-size: 0.8125rem;
  }

  .category-title,
  .outcome-card {
    font-size: 0.9375rem;
  }

  .nav,
  .footer-content,
  .footer-credit {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    padding: 0.55rem 0;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero {
    padding: 1.2rem 0 0.85rem;
  }

  .hero-actions .button {
    flex: 1 1 160px;
    text-align: center;
  }

  .section {
    padding: 1rem 0;
  }

  .site-footer {
    padding: 0.7rem 0;
  }

  .hero-image-card {
    width: min(100%, 340px);
  }

  .category-grid,
  .learning-grid,
  .outcome-grid,
  .language-options,
  .detail-meta {
    grid-template-columns: 1fr;
  }

  .category-card,
  .learning-card {
    min-height: auto;
  }
}