@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+Bengali:wght@600;700&family=Noto+Sans+Bengali:wght@400;500&display=swap');

:root {
  --font-heading: 'Noto Serif Bengali', serif;
  --font-body: 'Noto Sans Bengali', sans-serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;
  --font-size-hero: 3.5rem;

  --line-height-tight: 1.2;
  --line-height-base: 1.8;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  --color-primary: #5818C8;
  --color-secondary: #2B0A63;
  --color-accent: #08D0B8;
  --color-bg: #000000;
  --color-bg-alt: #12061F;
  --color-bg-card: #160A29;
  --color-text: #F5F5F5;
  --color-text-muted: #A78FD6;
  --color-text-on-primary: #FFFFFF;
  --color-border: #332055;
  --color-shadow: #1A0C30;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.25rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --radius-sm: 0.5rem;
  --radius: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 3rem;

  --shadow-sm: 0 0.5rem 1rem var(--color-shadow);
  --shadow-md: 0 1rem 2rem var(--color-shadow);
  --shadow-lg: 0 1.5rem 3rem var(--color-shadow);

  --header-height: 4rem;
  --container-max: 71.25rem;
}

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

html,
body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  font-weight: var(--font-weight-normal);
  background: var(--color-bg);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
video,
iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

h1 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-tight);
}

h2,
.section-title {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-tight);
}

h3 {
  font-size: var(--font-size-xl);
  line-height: 1.3;
}

h4 {
  font-size: var(--font-size-lg);
  line-height: 1.35;
}

p {
  margin: 0 0 var(--space-3);
  color: var(--color-text);
}

a {
  color: #E8E8E8;
  text-decoration: none;
  transition: 0.2s ease;
}

a:hover,
a:focus-visible {
  color: var(--color-accent);
}

strong {
  font-weight: var(--font-weight-bold);
}

em {
  font-style: italic;
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
  color: var(--color-text);
}

li {
  margin-bottom: 0.35rem;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  padding: 0 1rem;
  margin: 0 auto;
  box-sizing: border-box;
}

.section {
  padding: 3rem 0;
}

.section:first-of-type {
  padding: 7rem 0 4rem;
}

.section-title {
  margin-bottom: var(--space-5);
}

.section:first-of-type .section-title {
  font-size: clamp(2.2rem, 3.5vw, 3rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 64px;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  overflow: visible;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  overflow: hidden;
  max-height: 52px;
  text-decoration: none;
}

.site-logo img {
  height: 40px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.site-header a,
.site-header .nav-link,
.site-header .nav-dropdown-toggle {
  color: var(--color-text-on-primary);
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  padding: 0.4rem 0.6rem;
  z-index: 200;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.45);
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}

.nav-toggle-label span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: 0.2s ease;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 500;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
  overflow: visible;
}

.nav-toggle-input:checked ~ .site-nav {
  display: block;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0.5rem 0;
  margin: 0;
  list-style: none;
  overflow: visible;
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-on-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  bottom: 0.55rem;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: 0.2s ease;
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-dropdown-toggle:hover::after,
.nav-dropdown-toggle:focus-visible::after {
  width: calc(100% - 2rem);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus-visible {
  color: var(--color-accent);
}

.nav-dropdown {
  position: relative;
  overflow: visible;
}

.nav-dropdown-toggle {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.nav-dropdown-menu {
  display: none;
  position: static;
  top: 100%;
  left: 0;
  min-width: 200px;
  z-index: 9999;
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0.5rem 1rem;
  background: var(--color-bg-card);
  border: none;
  border-radius: var(--radius);
  box-shadow: none;
  white-space: nowrap;
}

.nav-dropdown:hover > .nav-dropdown-menu {
  display: block;
}

.nav-dropdown:focus-within > .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-menu .nav-link {
  display: block;
  padding: 0.5rem 1.25rem;
  width: 100%;
  border-bottom: none;
  color: var(--color-text);
}

.nav-dropdown-menu .nav-link:hover,
.nav-dropdown-menu .nav-link:focus-visible {
  background: var(--color-bg-alt);
  color: var(--color-accent);
}

.hero {
  min-height: 50vh;
  padding: 2rem 1rem;
  background: radial-gradient(circle at top, var(--color-primary) 0%, var(--color-secondary) 45%, var(--color-bg) 100%);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero h1 {
  font-size: var(--font-size-2xl);
  word-break: break-word;
}

.hero p {
  font-size: var(--font-size-base);
  color: inherit;
}

.hero-rd-ring {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 2rem;
  text-align: center;
  border: 6px solid var(--color-primary);
  border-radius: 48px;
  background: var(--color-bg-card);
  box-shadow: var(--shadow-lg);
}

.hero-rd-ring h1 {
  color: var(--color-text);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 0.75rem;
}

.hero-rd-ring p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero .card,
.hero-text-card {
  color: var(--color-text);
}

.hero-text-card h1,
.hero-text-card p {
  color: var(--color-text);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-alt) 100%);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: 0.2s ease;
}

.card::before {
  content: counter(card-count);
  counter-increment: card-count;
  position: absolute;
  top: 0.9rem;
  left: 0.9rem;
  width: 2.4rem;
  height: 2.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-sm);
}

.card-grid {
  counter-reset: card-count;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
  border-radius: var(--radius) var(--radius) 0 0;
}

.card-body {
  padding: 1rem 1.25rem;
}

.card > :not(img) {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.card > h3,
.card > h4,
.card > p,
.card > a,
.card > ul,
.card > ol,
.card > div:not(.card-body) {
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.card > h3,
.card > h4,
.card-body h3,
.card-body h4 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.card > h3,
.card > h4 {
  padding-top: 1rem;
}

.card > p,
.card-body p {
  margin: 0;
  line-height: var(--line-height-base);
  color: var(--color-text-muted);
}

.card > p:last-child,
.card-body p:last-child {
  padding-bottom: 1rem;
}

.btn {
  display: inline-block;
  max-width: 100%;
  padding: 0.8rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: center;
  cursor: pointer;
  word-break: break-word;
  white-space: normal;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--color-text-on-primary);
  filter: brightness(0.9);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-bg-alt);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.site-footer {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  padding: 2.5rem 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  text-align: center;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.footer-inner,
.footer-inner p,
.footer-inner li,
.footer-inner span {
  color: var(--color-text);
}

.footer-inner a {
  color: #E8E8E8;
}

.footer-inner .btn-primary {
  color: var(--color-text-on-primary) !important;
}

.footer-inner .btn-secondary {
  color: var(--color-primary) !important;
}

.faq-section {
  padding: 3rem 0;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  background: var(--color-bg-card);
  overflow: hidden;
  transition: 0.2s ease;
}

.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: 0 2px 12px var(--color-shadow);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  list-style: none;
  user-select: none;
  position: relative;
  padding-right: 2rem;
  color: var(--color-text);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 300;
  color: #E8E8E8;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] > .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.faq-answer p {
  margin: 0.75rem 0 0;
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

label {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

input,
textarea,
select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text);
  font: inherit;
  transition: 0.2s ease;
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 0.2rem var(--color-shadow);
}

textarea {
  min-height: 8rem;
  resize: vertical;
}

button[type='submit'] {
  display: inline-block;
  padding: 0.8rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: 0.2s ease;
}

button[type='submit']:hover,
button[type='submit']:focus-visible {
  filter: brightness(0.9);
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  display: block;
  overflow-x: auto;
  border-collapse: collapse;
  border-spacing: 0;
}

.compare-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  text-align: left;
}

th,
td,
.compare-table th,
.compare-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

thead th,
.compare-table thead th {
  background: var(--color-bg-alt);
  font-weight: var(--font-weight-bold);
}

tbody tr:nth-child(even),
.compare-table tbody tr:nth-child(even) {
  background: var(--color-bg-alt);
}

tbody tr:nth-child(odd),
.compare-table tbody tr:nth-child(odd) {
  background: var(--color-bg);
}

.compare-table td:first-child {
  font-weight: var(--font-weight-medium);
}

.fa-circle-check {
  color: #4ADE80;
}

.fa-circle-xmark {
  color: #F87171;
}

.fa-star {
  color: #F5B942;
}

.card .fa-solid,
.section .fa-2x {
  color: var(--color-accent);
}

.text-center {
  text-align: center;
}

.mt-1 {
  margin-top: var(--space-1);
}

.mt-2 {
  margin-top: var(--space-3);
}

.mt-3 {
  margin-top: var(--space-5);
}

.mt-4 {
  margin-top: var(--space-7);
}

.hidden {
  display: none !important;
}

@media (min-width: 768px) {
  .container {
    max-width: 960px;
    padding: 0 1.5rem;
    margin: 0 auto;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
  }

  .site-logo img {
    height: 44px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    display: block;
  }

  .nav-toggle-label {
    display: none !important;
  }

  .site-nav {
    display: flex !important;
    align-items: center;
    position: static;
    background: transparent;
    border-top: none;
    box-shadow: none;
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .nav-list {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: center;
    justify-content: flex-end;
    gap: 1.25rem;
    padding: 0;
    margin: 0;
    list-style: none;
  }

  .nav-link {
    display: inline-block;
    font-size: var(--font-size-sm);
    padding: 0.4rem 0.75rem;
    border-bottom: none;
    white-space: nowrap;
  }

  .nav-link::after {
    left: 0.75rem;
    bottom: 0.1rem;
  }

  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-dropdown-toggle:hover::after,
  .nav-dropdown-toggle:focus-visible::after {
    width: calc(100% - 1.5rem);
  }

  .nav-dropdown-menu {
    position: absolute !important;
    top: 100%;
    left: 0;
    z-index: 9999;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    border: 1px solid var(--color-border);
    padding: 0.5rem 0;
    background: var(--color-bg-card);
  }

  .hero {
    min-height: 60vh;
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .footer-inner {
    flex-direction: row;
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 1200px;
    padding: 0 2rem;
    margin: 0 auto;
  }

  .hero {
    min-height: 70vh;
  }

  .hero h1 {
    font-size: var(--font-size-hero);
  }

  .section {
    padding: 4rem 0;
  }
}
.hero .btn-secondary{color:var(--color-text-on-primary);border-color:var(--color-text-on-primary);}

/* === Language switcher (V3 multi-language) === */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 14px;
  flex-shrink: 0;
}
.lang-switcher .lang-link {
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
  padding: 3px 7px;
  border-radius: 3px;
  color: var(--color-text-on-primary, #fff);
  opacity: 0.65;
  transition: opacity 0.15s, background 0.15s;
  border: 1px solid rgba(255,255,255,0.25);
  letter-spacing: 0.3px;
}
.lang-switcher .lang-link:hover {
  opacity: 1;
  background: rgba(255,255,255,0.15);
}
.lang-switcher .lang-active {
  opacity: 1;
  background: rgba(255,255,255,0.2);
}
@media (max-width: 767px) {
  .lang-switcher {
    margin: 6px 0 0 0;
    justify-content: center;
  }
}