:root {
  --font-sans: "Be Vietnam Pro", "Inter", "Segoe UI", Arial, sans-serif;
  --ink: #16202a;
  --muted: #657282;
  --line: #dfe6ec;
  --paper: #ffffff;
  --soft: #f4f7f7;
  --mint: #0f9f8f;
  --mint-dark: #087467;
  --sun: #f3b338;
  --coral: #e65e4f;
  --navy: #22324a;
  --shadow: 0 18px 50px rgba(22, 32, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.55;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(223, 230, 236, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand,
.header-actions,
.main-nav,
.hero-actions,
.course-tools {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: white;
  border-radius: 8px;
  background: var(--mint);
}

.main-nav {
  justify-content: center;
  gap: clamp(12px, 3vw, 34px);
  color: var(--muted);
  font-weight: 650;
}

.main-nav a:hover {
  color: var(--ink);
}

.header-actions {
  gap: 10px;
}

.icon-button {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: white;
  cursor: pointer;
}

.cart-button,
.primary-button,
.secondary-button {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
}

.cart-button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px 0 16px;
  color: white;
  background: var(--navy);
}

.cart-button strong {
  display: grid;
  min-width: 26px;
  height: 26px;
  place-items: center;
  border-radius: 999px;
  color: var(--ink);
  background: var(--sun);
}

.hero {
  position: relative;
  min-height: min(720px, calc(100vh - 72px));
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: clamp(20px, 5vw, 72px);
  align-items: center;
  padding: clamp(34px, 7vw, 96px) clamp(18px, 6vw, 92px);
  overflow: hidden;
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(13, 22, 30, 0.86), rgba(13, 22, 30, 0.55), rgba(13, 22, 30, 0.12)),
    linear-gradient(0deg, rgba(13, 22, 30, 0.2), rgba(13, 22, 30, 0));
}

.hero-content {
  position: relative;
  width: min(720px, calc(100% - 36px));
  color: white;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--mint);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--sun);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(3.2rem, 8vw, 7rem);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.hero-content p:not(.eyebrow) {
  width: min(620px, 100%);
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.08rem;
}

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

.hero-category-panel {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 24px 70px rgba(13, 22, 30, 0.28);
  backdrop-filter: blur(16px);
}

.hero-panel-heading {
  display: grid;
  gap: 4px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.hero-panel-heading strong {
  font-size: 1.05rem;
}

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

.hero-category-list {
  display: grid;
  max-height: 410px;
  overflow: auto;
  padding: 8px;
}

.hero-category-link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  min-height: 46px;
  padding: 10px;
  border-radius: 8px;
  color: var(--ink);
  font-weight: 850;
}

.hero-category-link:hover {
  background: #e5f6f2;
}

.hero-category-link small {
  color: var(--mint-dark);
  font-size: 0.78rem;
  font-weight: 900;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
}

.primary-button {
  color: white;
  background: var(--mint);
}

.primary-button:hover {
  background: var(--mint-dark);
}

.secondary-button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: white;
}

.hero .secondary-button {
  border-color: rgba(255, 255, 255, 0.44);
  color: white;
  background: rgba(255, 255, 255, 0.16);
}

.compact {
  min-height: 38px;
  padding-inline: 14px;
}

.full {
  width: 100%;
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.stats-band div {
  padding: 28px clamp(16px, 4vw, 48px);
  background: var(--paper);
}

.stats-band strong {
  display: block;
  font-size: 1.55rem;
}

.stats-band span {
  color: var(--muted);
}

.section {
  padding: clamp(56px, 8vw, 104px) clamp(18px, 4vw, 56px);
}

.muted {
  background: var(--soft);
}

.section-heading {
  width: min(1180px, 100%);
  margin: 0 auto 28px;
}

.section-description {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--muted);
}

.with-tools {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.course-tools {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.search-box span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.search-box input,
.course-tools select {
  min-height: 42px;
  border: 0;
  outline: 0;
  background: transparent;
}

.course-tools select {
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.category-grid,
.course-layout {
  width: min(1180px, 100%);
  margin: 0 auto;
}

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

.category-card {
  min-height: 132px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  cursor: pointer;
}

.category-card:hover {
  border-color: var(--mint);
  box-shadow: var(--shadow);
}

.category-card strong {
  display: block;
  margin-bottom: 8px;
}

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

.course-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.course-sidebar {
  position: sticky;
  top: 94px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.sidebar-heading {
  display: grid;
  gap: 4px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.sidebar-heading span,
.result-bar {
  color: var(--muted);
  font-size: 0.92rem;
}

.category-menu {
  display: grid;
  padding: 8px;
}

.category-link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  min-height: 44px;
  padding: 10px;
  border-radius: 8px;
  color: var(--muted);
  font-weight: 800;
}

.category-link:hover,
.category-link.active {
  color: var(--ink);
  background: #e5f6f2;
}

.category-link small {
  color: inherit;
  font-size: 0.78rem;
  font-weight: 850;
}

.course-results {
  min-width: 0;
}

.result-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.result-bar a {
  color: var(--mint-dark);
  font-weight: 850;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.empty-state {
  grid-column: 1 / -1;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: white;
}

.course-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.course-thumb {
  position: relative;
  overflow: hidden;
  border-radius: 14px 14px 0 0;
}

.course-thumb img,
.course-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.course-thumb span {
  position: absolute;
  top: 10px;
  left: 10px;
  max-width: calc(100% - 20px);
  border-radius: 6px;
  padding: 4px 8px;
  color: white;
  background: var(--blue);
  font-size: 0.72rem;
  font-weight: 950;
  line-height: 1.1;
}

.discount-tag {
  top: 10px;
  right: 10px;
  left: auto !important;
  background: var(--coral) !important;
}

.course-card {
  position: relative;
}

.wishlist-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.wishlist-toggle.active {
  color: var(--coral);
}

.wishlist-toggle-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  width: 100%;
  color: var(--ink);
  background: white;
  font-weight: 800;
  cursor: pointer;
}

.wishlist-toggle-line .heart {
  color: var(--coral);
}

.wishlist-toggle-line.active {
  border-color: var(--coral);
}

.course-body {
  display: flex;
  min-height: 270px;
  flex: 1;
  flex-direction: column;
  padding: 18px;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.pill {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 0 9px;
  border-radius: 999px;
  color: var(--mint-dark);
  background: #e5f6f2;
  font-size: 0.78rem;
  font-weight: 850;
}

.course-body p {
  color: var(--muted);
}

.course-footer {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

.price {
  display: grid;
}

.price del {
  color: var(--muted);
  font-size: 0.84rem;
}

.price strong {
  color: var(--coral);
  font-size: 1.18rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: center;
  width: min(1180px, calc(100% - 36px));
  margin-inline: auto;
  padding-inline: 0;
}

.section-copy p:not(.eyebrow) {
  color: var(--muted);
}

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

.timeline div {
  display: grid;
  grid-template-columns: 54px 1fr;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.timeline strong {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 8px;
  color: white;
  background: var(--navy);
}

.learning-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 18px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.my-course-list {
  display: grid;
  gap: 12px;
}

.my-course-item {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.my-course-item button {
  margin-top: 12px;
}

.status {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.lesson-player {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.video-frame {
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  margin-bottom: 18px;
  border-radius: 8px;
  background: #0d161e;
}

.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(300px, 520px);
  gap: clamp(24px, 6vw, 70px);
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding-inline: 0;
}

.contact-section p {
  color: var(--muted);
}

.contact-form {
  display: grid;
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-weight: 750;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  background: white;
}

.contact-form textarea {
  min-height: 118px;
  resize: vertical;
}

.drawer {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  justify-content: flex-end;
  background: rgba(13, 22, 30, 0.45);
}

.drawer.open {
  display: flex;
}

.drawer-panel {
  display: flex;
  width: min(430px, 100%);
  height: 100%;
  flex-direction: column;
  background: white;
  box-shadow: var(--shadow);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.drawer-header h2 {
  font-size: 1.5rem;
}

.cart-items {
  display: grid;
  gap: 12px;
  flex: 1;
  overflow: auto;
  padding: 18px;
}

.cart-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 12px;
  align-items: center;
}

.cart-item img {
  width: 72px;
  height: 54px;
  border-radius: 8px;
  object-fit: cover;
}

.cart-item strong {
  display: block;
}

.cart-item span {
  color: var(--muted);
  font-size: 0.9rem;
}

.cart-summary {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-top: 1px solid var(--line);
}

.cart-summary div {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal {
  width: min(540px, calc(100% - 32px));
  border: 0;
  border-radius: 8px;
  padding: 0;
  box-shadow: var(--shadow);
}

.modal::backdrop {
  background: rgba(13, 22, 30, 0.55);
}

.modal-body {
  position: relative;
  padding: 24px;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
}

.bank-box {
  display: grid;
  gap: 1px;
  overflow: hidden;
  margin: 18px 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.bank-box div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  background: white;
}

.bank-box span {
  color: var(--muted);
}

.bank-value {
  display: flex;
  align-items: center;
  gap: 10px;
}

.copy-chip {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 10px;
  color: var(--blue);
  background: white;
  font-size: 0.78rem;
  font-weight: 850;
  cursor: pointer;
  white-space: nowrap;
}

.copy-chip:hover {
  border-color: var(--blue);
}

.course-actions {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 8px;
  min-width: 0;
}

.course-quick-buy,
.course-add-cart {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 7px 8px;
  font-size: 0.68rem;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
}

.course-add-cart {
  font-size: 0.66rem;
}

.payment-qr-card {
  grid-column: 1 / -1;
}

.qr-payment-layout {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 20px;
  align-items: start;
  margin: 20px 0;
}

.payment-qr-image {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .main-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .stats-band,
  .category-grid,
  .course-layout,
  .course-grid,
  .learning-layout,
  .contact-section,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-content {
    width: 100%;
  }

  .hero-category-panel {
    max-width: 560px;
  }

  .course-sidebar {
    position: static;
  }

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

  .with-tools {
    align-items: stretch;
    flex-direction: column;
  }

  .course-tools {
    justify-content: flex-start;
  }

  .qr-payment-layout {
    grid-template-columns: 1fr;
  }

  .course-actions {
    grid-template-columns: 1fr;
  }
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid #e8edf5;
  padding: 24px clamp(18px, 4vw, 56px);
  color: #64748b;
  background: white;
}

.site-footer div,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.site-footer strong {
  color: var(--blue);
}

.site-footer a {
  color: #334155;
  font-weight: 800;
}

.checkout-form,
.sepay-panel {
  display: grid;
  gap: 14px;
}

.checkout-form label,
.sepay-panel label {
  display: grid;
  gap: 6px;
  color: #506176;
  font-weight: 850;
}

.checkout-form input,
.sepay-panel input {
  min-height: 42px;
  border: 1px solid #dce5f2;
  border-radius: 8px;
  padding: 0 12px;
}

.copy-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.copy-line button {
  border: 1px solid #dce5f2;
  border-radius: 8px;
  padding: 0 12px;
  color: #2563eb;
  background: white;
  font-weight: 900;
  cursor: pointer;
}

.checkout-line {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid #edf1f6;
  padding: 12px 0;
  color: #506176;
  font-weight: 800;
}

.my-course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.my-course-card {
  overflow: hidden;
  border: 1px solid #e4ebf5;
  border-radius: 16px;
  background: white;
  box-shadow: 0 14px 36px rgba(19, 37, 73, 0.06);
}

.my-course-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.my-course-card div {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.progress-bar {
  overflow: hidden;
  height: 9px;
  border-radius: 999px;
  background: #e8eef8;
}

.progress-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--blue);
}

.learn-page {
  background: #f7f9fc;
  padding: 28px 0 56px;
}

.learn-shell {
  display: grid;
  grid-template-columns: minmax(260px, 340px) minmax(0, 1fr);
  gap: 20px;
  width: min(1300px, calc(100% - 40px));
  margin: 0 auto;
}

.learn-sidebar,
.learn-main {
  border: 1px solid #e4ebf5;
  border-radius: 16px;
  background: white;
  box-shadow: 0 14px 36px rgba(19, 37, 73, 0.06);
}

.learn-sidebar {
  align-self: start;
  padding: 16px;
}

.learn-sidebar h2 {
  margin-bottom: 14px;
  font-size: 1.1rem;
}

#learnLessons {
  display: grid;
  gap: 8px;
}

#learnLessons button {
  display: grid;
  gap: 4px;
  border: 1px solid #e4ebf5;
  border-radius: 10px;
  padding: 10px;
  text-align: left;
  color: #334155;
  background: #f8fafc;
  cursor: pointer;
  font-weight: 850;
}

#learnLessons button.active,
#learnLessons button:hover {
  border-color: #cfe0ff;
  color: var(--blue);
  background: var(--blue-soft);
}

#learnLessons small {
  color: #94a3b8;
  font-size: 0.72rem;
}

.learn-main {
  overflow: hidden;
}

.learn-content {
  padding: 20px;
}

.learn-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

@media (max-width: 920px) {
  .site-footer,
  .learn-shell {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .my-course-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header {
    padding-inline: 14px;
  }

  .brand span:last-child,
  .cart-button span {
    display: none;
  }

  .hero {
    padding-block: 48px;
  }

  .hero-content {
    margin-inline: 0;
  }

  .hero-category-list {
    max-height: none;
  }

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

  .course-tools,
  .search-box,
  .course-tools select {
    width: 100%;
  }

  .category-menu {
    grid-template-columns: 1fr;
  }

  .cart-item {
    grid-template-columns: 64px 1fr;
  }

  .cart-item button {
    grid-column: 2;
    width: max-content;
  }
}

/* Shop-style homepage inspired by Vietnamese course marketplaces. */
:root {
  --blue: #316bf3;
  --blue-dark: #1f56d8;
  --blue-soft: #eef4ff;
  --orange: #f97316;
  --shop-bg: #ffffff;
  --shop-soft: #f6f8fc;
}

body {
  background: var(--shop-bg);
}

.promo-bar {
  display: flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 8px 18px;
  color: white;
  background: var(--blue);
  font-size: 0.9rem;
  font-weight: 800;
  text-align: center;
}

.promo-bar a {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  border-radius: 6px;
  padding: 0 12px;
  color: var(--blue);
  background: white;
  white-space: nowrap;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: block;
  padding: 0;
  border-bottom: 1px solid #e8edf5;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
}

.header-main {
  display: grid;
  grid-template-columns: 160px 236px minmax(260px, 1fr) auto;
  gap: 14px;
  align-items: center;
  min-height: 62px;
  padding: 10px clamp(18px, 3vw, 28px);
}

.brand {
  gap: 9px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, #ff8a00, var(--blue));
  font-size: 0.76rem;
}

.brand strong {
  display: block;
  color: var(--blue);
  font-size: 1.16rem;
  line-height: 1;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: #7890ad;
  font-size: 0.58rem;
  font-weight: 800;
  line-height: 1.1;
}

.catalog-button {
  display: flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 10px;
  padding: 0 16px;
  color: white;
  background: var(--blue);
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(49, 107, 243, 0.2);
}

.global-search {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  border-radius: 11px;
  padding: 0 14px;
  color: #91a1b8;
  background: #eef2f7;
}

.global-search input {
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 650;
}

.global-search button {
  border: 0;
  color: #91a1b8;
  background: transparent;
  cursor: pointer;
  font-size: 1.2rem;
}

.header-actions {
  gap: 18px;
  white-space: nowrap;
}

.plain-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  color: #151b27;
  background: transparent;
  cursor: pointer;
  font-weight: 900;
}

.plain-action strong {
  display: grid;
  min-width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 999px;
  color: white;
  background: var(--orange);
  font-size: 0.76rem;
}

.main-nav {
  justify-content: center;
  gap: clamp(18px, 3vw, 34px);
  min-height: 48px;
  border-top: 1px solid #edf1f6;
  color: #222936;
  background: white;
  font-weight: 850;
}

.main-nav a {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  border-bottom: 2px solid transparent;
  padding-inline: 6px;
}

.main-nav a.active,
.main-nav a:hover {
  color: var(--blue);
}

.main-nav a.active {
  border-bottom-color: var(--blue);
  background: linear-gradient(180deg, rgba(37, 99, 235, 0), rgba(37, 99, 235, 0.08));
}

.hero {
  width: min(1530px, calc(100% - 40px));
  min-height: 0;
  margin: 86px auto 0;
  padding: 0;
  display: block;
  overflow: visible;
  background: white;
}

.hero-slider {
  display: grid;
  grid-template-columns: minmax(520px, 0.95fr) minmax(560px, 1fr) minmax(280px, 0.44fr);
  gap: 16px;
  overflow: hidden;
}

.promo-card {
  position: relative;
  display: grid;
  min-height: 378px;
  overflow: hidden;
  border: 1px solid #e7edf6;
  border-radius: 18px;
  background: white;
  box-shadow: 0 16px 40px rgba(19, 37, 73, 0.06);
}

.promo-card .badge {
  display: inline-flex;
  width: max-content;
  max-width: 100%;
  min-height: 28px;
  align-items: center;
  border-radius: 999px;
  padding: 0 10px;
  color: #bd1d1d;
  background: white;
  font-size: 0.78rem;
  font-weight: 950;
}

.welcome-card {
  grid-template-columns: 1fr 0.88fr;
  align-items: center;
  padding: 28px;
  background:
    radial-gradient(circle at 88% 62%, #16c79a 0 40px, transparent 42px),
    radial-gradient(circle at 68% 25%, #1b8cff 0 26px, transparent 28px),
    #fff;
}

.welcome-card h1 {
  margin: 18px 0 14px;
  color: #182234;
  font-size: clamp(1.7rem, 2.2vw, 2.2rem);
  line-height: 1.1;
}

.welcome-card h1 strong,
.feature-card h2 strong,
.mini-card h2 strong {
  color: var(--blue);
}

.welcome-card p,
.feature-card p,
.mini-card p {
  color: #5c6d83;
  font-weight: 650;
}

.welcome-card img {
  align-self: end;
  width: 100%;
  height: 330px;
  border-radius: 18px;
  object-fit: cover;
  object-position: center top;
}

.coupon-box {
  display: grid;
  grid-template-columns: 1fr auto;
  width: min(260px, 100%);
  margin: 18px 0;
  border-radius: 10px;
  padding: 10px 12px;
  background: #f6f8fc;
  box-shadow: 0 10px 26px rgba(49, 107, 243, 0.12);
}

.coupon-box strong {
  color: var(--blue);
}

.coupon-box span {
  grid-column: 1;
  color: #3d4b60;
  font-size: 0.78rem;
  font-weight: 800;
}

.coupon-box button {
  grid-row: 1 / span 2;
  grid-column: 2;
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 8px;
  color: white;
  background: var(--blue);
}

.feature-card {
  grid-template-columns: 0.88fr 1fr;
  align-items: center;
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(238, 244, 255, 0.96), rgba(255, 244, 231, 0.88)),
    #fff;
}

.feature-card h2,
.mini-card h2 {
  margin: 16px 0 12px;
  font-size: clamp(1.65rem, 2.4vw, 2.35rem);
  line-height: 1.12;
}

.feature-card img {
  width: 100%;
  height: 300px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 24px 48px rgba(49, 46, 129, 0.18);
}

.mini-card {
  align-content: center;
  padding: 26px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(255, 237, 213, 0.92)),
    url("https://images.unsplash.com/photo-1519389950473-47ba0277781c?auto=format&fit=crop&w=520&q=80");
  background-size: cover;
  background-blend-mode: screen;
}

.orange-button {
  display: inline-flex;
  width: max-content;
  min-height: 42px;
  align-items: center;
  border-radius: 8px;
  padding: 0 16px;
  color: white;
  background: var(--orange);
  font-weight: 900;
}

.slider-arrow {
  position: absolute;
  top: 50%;
  z-index: 2;
  width: 40px;
  height: 40px;
  transform: translateY(-50%);
  border: 1px solid #e5ebf4;
  border-radius: 999px;
  color: #53647c;
  background: white;
  box-shadow: 0 8px 26px rgba(19, 37, 73, 0.12);
  cursor: pointer;
  font-size: 2rem;
  line-height: 1;
}

.slider-arrow.left {
  left: -20px;
}

.slider-arrow.right {
  right: -20px;
}

.slider-dots {
  display: flex;
  gap: 6px;
  margin-top: 18px;
}

.slider-dots span {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #7aa0f7;
}

.slider-dots span:nth-child(2) {
  width: 22px;
  background: var(--blue);
}

.home-categories,
.section {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0;
}

.section-card-heading {
  display: flex;
  width: min(760px, 100%);
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 auto 24px;
  border: 1px solid #dce8ff;
  border-radius: 16px;
  padding: 18px;
  background: #fbfdff;
  box-shadow: 0 18px 46px rgba(49, 107, 243, 0.08);
}

.section-card-heading h2 {
  color: #172031;
  font-size: 1.45rem;
}

.section-card-heading a {
  display: grid;
  min-width: 42px;
  height: 42px;
  place-items: center;
  border: 2px solid var(--blue);
  border-radius: 999px;
  color: var(--blue);
  font-weight: 900;
}

.category-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.category-card {
  min-height: 96px;
  border-color: #e4ebf5;
  box-shadow: 0 10px 24px rgba(19, 37, 73, 0.04);
}

.category-card:hover {
  border-color: var(--blue);
}

.muted {
  width: 100%;
  max-width: none;
  background: white;
}

.section.muted > .section-heading,
.section.muted > .course-layout {
  width: min(1200px, calc(100% - 40px));
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading .eyebrow {
  color: var(--blue);
  font-size: 1.25rem;
  letter-spacing: 0;
  text-transform: none;
}

.section-heading h2 {
  font-size: 1.35rem;
}

.course-sidebar,
.result-bar,
.course-card {
  border-color: #e4ebf5;
  box-shadow: 0 10px 24px rgba(19, 37, 73, 0.04);
}

.category-link:hover,
.category-link.active {
  color: var(--blue);
  background: var(--blue-soft);
}

.course-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.course-card {
  border-radius: 14px;
}

.course-card img {
  border-radius: 14px 14px 0 0;
}

.course-body {
  min-height: 248px;
  padding: 14px;
}

.course-body h3 {
  display: -webkit-box;
  min-height: 3.8em;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  font-size: 0.98rem;
  line-height: 1.28;
}

.course-body p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 0.9rem;
}

.pill {
  color: var(--blue);
  background: var(--blue-soft);
}

.price strong {
  color: var(--orange);
}

.primary-button {
  border-radius: 8px;
  background: var(--blue);
  box-shadow: 0 10px 20px rgba(49, 107, 243, 0.18);
}

.primary-button:hover {
  background: var(--blue-dark);
}

.floating-socials {
  position: fixed;
  left: 12px;
  bottom: 28px;
  z-index: 25;
  display: grid;
  gap: 14px;
}

.floating-socials a {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border: 5px solid #d7edff;
  border-radius: 999px;
  color: white;
  background: #2f92ee;
  font-weight: 950;
  box-shadow: 0 8px 22px rgba(47, 146, 238, 0.2);
}

@media (max-width: 1180px) {
  .header-main {
    grid-template-columns: 150px minmax(0, 1fr) auto;
  }

  .catalog-button {
    display: none;
  }

  .hero-slider {
    grid-template-columns: minmax(520px, 1fr) minmax(480px, 0.9fr);
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .mini-card {
    min-width: 280px;
  }

  .course-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .promo-bar {
    flex-direction: column;
    gap: 6px;
  }

  .header-main {
    grid-template-columns: 1fr auto;
  }

  .global-search {
    grid-column: 1 / -1;
    order: 3;
  }

  .header-actions {
    gap: 10px;
  }

  .plain-action span {
    display: none;
  }

  .main-nav {
    justify-content: flex-start;
    overflow-x: auto;
    padding-inline: 16px;
  }

  .hero {
    margin-top: 28px;
  }

  .hero-slider {
    grid-template-columns: minmax(310px, 88vw);
  }

  .welcome-card,
  .feature-card {
    grid-template-columns: 1fr;
  }

  .welcome-card img,
  .feature-card img {
    height: 220px;
  }

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

@media (max-width: 560px) {
  .promo-bar {
    font-size: 0.78rem;
  }

  .brand small {
    display: none;
  }

  .header-actions {
    gap: 6px;
  }

  .plain-action {
    font-size: 0.95rem;
  }

  .hero,
  .home-categories,
  .section.muted > .section-heading,
  .section.muted > .course-layout {
    width: min(100% - 24px, 1200px);
  }

  .promo-card {
    min-height: 0;
    padding: 20px;
  }

  .slider-arrow {
    display: none;
  }

  .section-card-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .category-grid,
  .course-grid {
    grid-template-columns: 1fr;
  }

  .floating-socials {
    display: none;
  }
}

/* Phase: mega menu and course detail page. */
.catalog-button {
  border: 0;
  cursor: pointer;
}

.mega-menu {
  position: absolute;
  left: clamp(18px, 3vw, 28px);
  right: clamp(18px, 3vw, 28px);
  top: 66px;
  z-index: 35;
  display: none;
}

.mega-menu.open {
  display: block;
}

.mega-menu-inner {
  overflow: hidden;
  border: 1px solid #e2e9f4;
  border-radius: 16px;
  background: white;
  box-shadow: 0 28px 80px rgba(19, 37, 73, 0.18);
}

.mega-menu-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid #edf1f6;
}

.mega-menu-heading strong {
  color: #172031;
  font-size: 1.08rem;
}

.mega-menu-heading span {
  color: #6b7b91;
  font-size: 0.92rem;
}

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  max-height: min(68vh, 560px);
  overflow: auto;
  background: #edf1f6;
}

.mega-category {
  display: grid;
  align-content: start;
  gap: 10px;
  min-height: 188px;
  padding: 16px;
  background: white;
}

.mega-category-title {
  display: grid;
  gap: 4px;
  border-radius: 10px;
  padding: 10px;
  color: #16202a;
  font-weight: 950;
}

.mega-category-title:hover {
  color: var(--blue);
  background: var(--blue-soft);
}

.mega-category-title small {
  color: #7c8ca3;
  font-size: 0.78rem;
}

.mega-subcategory-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mega-subcategory-list a {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  border: 1px solid #e4ebf5;
  border-radius: 999px;
  padding: 0 10px;
  color: #5d6d84;
  background: #f8fafc;
  font-size: 0.82rem;
  font-weight: 800;
}

.mega-subcategory-list a:hover {
  border-color: #cfe0ff;
  color: var(--blue);
  background: var(--blue-soft);
}

.course-thumb {
  display: block;
}

.course-detail-section {
  width: 100%;
  background: #f7f9fc;
  padding: 36px 0 72px;
}

.course-detail-shell {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--blue);
  font-weight: 900;
}

.course-detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 20px;
  align-items: start;
}

.course-preview,
.course-purchase-card,
.detail-card {
  border: 1px solid #e4ebf5;
  border-radius: 16px;
  background: white;
  box-shadow: 0 14px 36px rgba(19, 37, 73, 0.06);
}

.course-preview {
  overflow: hidden;
}

.course-preview img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.video-preview-label {
  padding: 14px 16px;
  color: #64748b;
  font-size: 0.92rem;
  font-weight: 800;
  background: #f8fafc;
}

.course-purchase-card {
  position: sticky;
  top: 128px;
  padding: 20px;
}

.course-purchase-card h1 {
  margin: 14px 0 10px;
  color: #172031;
  font-size: clamp(1.55rem, 2.4vw, 2.2rem);
  line-height: 1.12;
}

.course-purchase-card p {
  color: #5d6d84;
}

.detail-price {
  display: grid;
  gap: 2px;
  margin: 18px 0;
}

.detail-price del {
  color: #8795aa;
  font-size: 1rem;
  font-weight: 750;
}

.detail-price strong {
  color: var(--orange);
  font-size: 2rem;
  line-height: 1;
}

.detail-actions {
  display: grid;
  gap: 10px;
}

.course-facts {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding-left: 18px;
  color: #56657a;
  font-weight: 750;
}

.course-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.detail-card {
  padding: 20px;
}

.detail-card h2 {
  margin-bottom: 14px;
  color: #172031;
  font-size: 1.35rem;
}

.detail-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  color: #506176;
  font-weight: 700;
}

.curriculum-card,
.faq-card {
  margin-top: 20px;
}

.detail-card details {
  border-top: 1px solid #edf1f6;
  padding: 12px 0;
}

.detail-card details:first-of-type {
  border-top: 0;
}

.detail-card summary {
  cursor: pointer;
  color: #172031;
  font-weight: 950;
}

.detail-card ol {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 22px;
  color: #5d6d84;
  font-weight: 700;
}

.faq-card p {
  margin: 10px 0 0;
  color: #5d6d84;
}

.related-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.related-heading a {
  color: var(--blue);
  font-weight: 900;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.related-card {
  display: grid;
  gap: 8px;
  overflow: hidden;
  border: 1px solid #e4ebf5;
  border-radius: 12px;
  background: white;
}

.related-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.related-card strong {
  display: -webkit-box;
  min-height: 2.6em;
  overflow: hidden;
  padding: 0 10px;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  color: #172031;
  font-size: 0.9rem;
}

.related-card span {
  padding: 0 10px 10px;
  color: var(--orange);
  font-weight: 950;
}

@media (max-width: 1180px) {
  .catalog-button {
    display: flex;
  }

  .mega-menu-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .catalog-button {
    grid-column: 1 / -1;
    order: 2;
    width: 100%;
  }

  .global-search {
    order: 4;
  }

  .mega-menu {
    left: 12px;
    right: 12px;
    top: 118px;
  }

  .mega-menu-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .mega-menu-grid,
  .course-detail-hero,
  .course-detail-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .course-purchase-card {
    position: static;
  }
}

/* Local app routing: keep the static prototype feeling like real pages. */
.view-category #home,
.view-category .home-categories,
.view-category #roadmap,
.view-category #my-courses,
.view-category #contact,
.view-category #cartPage,
.view-category #ordersPage,
.view-category #policyPage,
.view-course #home,
.view-course .home-categories,
.view-course #courses,
.view-course #roadmap,
.view-course #my-courses,
.view-course #contact,
.view-course #cartPage,
.view-course #ordersPage,
.view-course #policyPage,
.view-cart #home,
.view-cart .home-categories,
.view-cart #courses,
.view-cart #courseDetail,
.view-cart #roadmap,
.view-cart #my-courses,
.view-cart #contact,
.view-cart #ordersPage,
.view-cart #policyPage,
.view-orders #home,
.view-orders .home-categories,
.view-orders #courses,
.view-orders #courseDetail,
.view-orders #roadmap,
.view-orders #my-courses,
.view-orders #contact,
.view-orders #cartPage,
.view-orders #policyPage,
.view-my-courses #home,
.view-my-courses .home-categories,
.view-my-courses #courses,
.view-my-courses #courseDetail,
.view-my-courses #roadmap,
.view-my-courses #contact,
.view-my-courses #cartPage,
.view-my-courses #ordersPage,
.view-my-courses #policyPage,
.view-contact #home,
.view-contact .home-categories,
.view-contact #courses,
.view-contact #courseDetail,
.view-contact #roadmap,
.view-contact #my-courses,
.view-contact #cartPage,
.view-contact #ordersPage,
.view-contact #policyPage,
.view-policy #home,
.view-policy .home-categories,
.view-policy #courses,
.view-policy #courseDetail,
.view-policy #roadmap,
.view-policy #my-courses,
.view-policy #contact,
.view-policy #cartPage,
.view-policy #ordersPage {
  display: none;
}

.view-home #courseDetail,
.view-home #cartPage,
.view-home #ordersPage,
.view-home #policyPage {
  display: none;
}

.standalone-page {
  width: 100%;
  min-height: 62vh;
  padding: 42px 0 80px;
  background: #f7f9fc;
}

.standalone-shell {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.page-heading {
  margin-bottom: 22px;
}

.page-heading h1 {
  margin: 0 0 8px;
  color: #172031;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
}

.page-heading p:not(.eyebrow) {
  color: #64748b;
  font-weight: 700;
}

.commerce-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  gap: 20px;
  align-items: start;
}

.commerce-card {
  border: 1px solid #e4ebf5;
  border-radius: 16px;
  padding: 18px;
  background: white;
  box-shadow: 0 14px 36px rgba(19, 37, 73, 0.06);
}

.cart-page-item {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr) auto auto;
  gap: 14px;
  align-items: center;
  border-bottom: 1px solid #edf1f6;
  padding: 14px 0;
}

.cart-page-item:first-child {
  padding-top: 0;
}

.cart-page-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.cart-page-item img {
  width: 132px;
  aspect-ratio: 16 / 9;
  border-radius: 10px;
  object-fit: cover;
}

.cart-page-item h3,
.order-item h3 {
  margin: 8px 0 6px;
  color: #172031;
}

.cart-page-item p,
.order-item p,
.sepay-panel p {
  margin: 0;
  color: #64748b;
}

.cart-page-item > strong,
.order-item > strong {
  color: var(--orange);
  font-size: 1.05rem;
}

.order-summary-card {
  position: sticky;
  top: 128px;
  display: grid;
  gap: 14px;
}

.summary-row,
.summary-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.summary-row {
  color: #64748b;
  font-weight: 800;
}

.summary-total {
  border-top: 1px solid #edf1f6;
  padding-top: 14px;
  color: #172031;
  font-size: 1.12rem;
  font-weight: 950;
}

.summary-total strong {
  color: var(--orange);
  font-size: 1.45rem;
}

.order-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  border-bottom: 1px solid #edf1f6;
  padding: 16px 0;
}

.order-item:first-child {
  padding-top: 0;
}

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

.order-item small {
  color: #94a3b8;
  font-weight: 700;
}

.order-timeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
}

.timeline-step {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  color: var(--muted);
  background: #eef2f8;
  font-size: 0.74rem;
  font-weight: 850;
  white-space: nowrap;
}

.timeline-step.done {
  color: var(--mint-dark);
  background: #e5f6f2;
}

.timeline-step.current {
  color: white;
  background: var(--blue);
}

.timeline-step.cancelled {
  color: #c0392b;
  background: #fde8e8;
}

.timeline-arrow {
  color: #c3cbd8;
  font-size: 0.78rem;
}

.sepay-panel {
  display: grid;
  gap: 12px;
}

.sepay-panel label {
  display: grid;
  gap: 6px;
  color: #506176;
  font-weight: 850;
}

.sepay-panel input {
  min-height: 42px;
  border: 1px solid #dce5f2;
  border-radius: 8px;
  padding: 0 12px;
}

.webhook-result {
  min-height: 42px;
  border-radius: 8px;
  padding: 10px 12px;
  color: #506176;
  background: #f8fafc;
  font-weight: 800;
}

.webhook-result.success {
  color: #047857;
  background: #ecfdf5;
}

.webhook-result.error {
  color: #b91c1c;
  background: #fef2f2;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.policy-grid p {
  color: #64748b;
  font-weight: 700;
}

.auth-form {
  display: grid;
  max-width: 520px;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 7px;
  color: #506176;
  font-weight: 850;
}

.auth-form input {
  min-height: 44px;
  border: 1px solid #dce5f2;
  border-radius: 9px;
  padding: 0 12px;
  font: inherit;
}

.auth-switch {
  margin: 0;
  color: #64748b;
  font-weight: 800;
}

.auth-switch a {
  color: var(--blue);
}

.account-card {
  display: grid;
  max-width: 760px;
  gap: 16px;
}

.account-card h2 {
  margin: 0;
}

.account-actions {
  flex-wrap: wrap;
}

@media (max-width: 920px) {
  .commerce-layout,
  .policy-grid {
    grid-template-columns: 1fr;
  }

  .order-summary-card {
    position: static;
  }

  .cart-page-item {
    grid-template-columns: 96px minmax(0, 1fr);
  }

  .cart-page-item img {
    width: 96px;
  }

  .cart-page-item > strong,
  .cart-page-item > button {
    grid-column: 2;
    width: max-content;
  }
}

.admin-body {
  min-height: 100vh;
  margin: 0;
  color: #172031;
  background: #f5f8fc;
}

.admin-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid #dfe7f3;
  padding: 14px clamp(16px, 4vw, 44px);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.admin-brand,
.admin-nav,
.admin-page-heading,
.admin-card-heading,
.admin-course-cell,
.admin-row-actions {
  display: flex;
  align-items: center;
}

.admin-brand {
  gap: 10px;
  color: #172031;
  text-decoration: none;
}

.admin-brand span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 10px;
  color: white;
  background: var(--blue);
  font-weight: 950;
}

.admin-nav {
  flex-wrap: wrap;
  gap: 8px;
}

.admin-nav a,
.admin-card-heading a,
.admin-row-actions button {
  border: 1px solid #dfe7f3;
  border-radius: 8px;
  padding: 9px 12px;
  color: #274268;
  background: white;
  text-decoration: none;
  font-weight: 850;
}

.admin-nav a:hover,
.admin-card-heading a:hover,
.admin-row-actions button:hover {
  color: white;
  border-color: var(--blue);
  background: var(--blue);
}

.admin-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 56px;
}

.admin-page-heading {
  align-items: flex-start;
  flex-direction: column;
  margin-bottom: 20px;
}

.admin-page-heading h1 {
  margin: 4px 0 8px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.admin-page-heading p:last-child {
  max-width: 720px;
  margin: 0;
  color: #64748b;
  font-weight: 750;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.admin-stat-card,
.admin-card {
  border: 1px solid #dfe7f3;
  border-radius: 14px;
  background: white;
  box-shadow: 0 16px 34px rgba(24, 45, 79, 0.06);
}

.admin-stat-card {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.admin-stat-card span {
  color: #64748b;
  font-weight: 850;
}

.admin-stat-card strong {
  color: var(--blue);
  font-size: 1.75rem;
  line-height: 1;
}

.admin-stat-card.revenue {
  grid-column: span 2;
}

.admin-card {
  padding: 18px;
}

.admin-card-heading {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.admin-helper-text {
  margin: -4px 0 18px;
  color: #64748b;
  font-size: 0.92rem;
}

.admin-card-heading h2 {
  margin: 0;
}

.admin-card-heading span,
.admin-note-grid p {
  color: #64748b;
  font-weight: 800;
}

.payment-subheading {
  margin-top: 8px;
  border-top: 1px solid #edf1f6;
  padding-top: 16px;
}

.admin-note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.admin-grid {
  display: grid;
  grid-template-columns: 390px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.admin-form-grid label {
  display: grid;
  gap: 7px;
  color: #506176;
  font-weight: 850;
}

.admin-form-grid .span-2 {
  grid-column: span 2;
}

.admin-form-grid input,
.admin-form-grid select,
.admin-form-grid textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid #dce5f2;
  border-radius: 9px;
  padding: 0 12px;
  color: #172031;
  background: #fbfdff;
  font: inherit;
}

.admin-toggle {
  display: flex !important;
  align-items: center;
  grid-template-columns: none !important;
  gap: 10px !important;
}

.admin-toggle input {
  width: 18px;
  min-height: 18px;
}

.payment-note-grid {
  grid-template-columns: 1fr;
}

.admin-form-grid textarea {
  min-height: 92px;
  padding-top: 10px;
  resize: vertical;
}

.admin-form-grid .code-textarea {
  min-height: 180px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.86rem;
  line-height: 1.5;
}

.admin-course-form {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 14px;
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.admin-table th,
.admin-table td {
  border-bottom: 1px solid #edf1f6;
  padding: 12px;
  text-align: left;
  vertical-align: middle;
}

.admin-table th {
  color: #64748b;
  background: #f8fbff;
  font-size: 0.82rem;
  text-transform: uppercase;
}

.admin-table td small,
.admin-table td del {
  display: block;
  color: #94a3b8;
  font-weight: 750;
}

.admin-course-cell {
  gap: 10px;
  min-width: 260px;
}

.admin-course-cell img {
  width: 72px;
  aspect-ratio: 16 / 10;
  border-radius: 9px;
  object-fit: cover;
}

.admin-row-actions {
  justify-content: flex-end;
  gap: 7px;
}

.admin-row-actions.stacked {
  align-items: stretch;
  flex-direction: column;
}

.admin-row-actions button {
  cursor: pointer;
}

.admin-action-link,
.admin-row-actions .edit-action {
  display: inline-flex;
  justify-content: center;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 7px 10px;
  color: #1d4ed8;
  background: #eff6ff;
  font-weight: 900;
}

.admin-row-actions .edit-action:hover,
.admin-action-link:hover {
  border-color: #2563eb;
  background: #dbeafe;
}

.admin-row-actions .danger:hover,
.admin-row-actions button.danger {
  color: #b91c1c;
  border-color: #fecaca;
  background: #fff7f7;
}

.admin-status {
  display: inline-flex;
  border-radius: 999px;
  padding: 6px 10px;
  color: #64748b;
  background: #f1f5f9;
  font-weight: 900;
}

.admin-status.completed {
  color: #047857;
  background: #ecfdf5;
}

.admin-status.on-hold {
  color: #b45309;
  background: #fffbeb;
}

.admin-status.cancelled {
  color: #b91c1c;
  background: #fef2f2;
}

.admin-message {
  min-height: 22px;
  color: #047857;
  font-weight: 850;
}

.admin-message.error {
  color: #b91c1c;
}

.admin-auth-warning {
  border: 1px solid #bfdbfe;
  border-radius: 14px;
  margin-bottom: 18px;
  padding: 18px;
  color: #1e3a8a;
  background: #eff6ff;
  font-weight: 850;
}

.admin-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.admin-filter-bar input,
.admin-filter-bar select,
.admin-filter-bar button {
  min-height: 38px;
  border: 1px solid #dce5f2;
  border-radius: 8px;
  padding: 0 12px;
  background: white;
  font-weight: 850;
}

.builder-block {
  border: 1px solid #edf1f6;
  border-radius: 12px;
  padding: 12px;
  background: #f8fbff;
}

.builder-section,
.builder-lesson {
  display: grid;
  gap: 10px;
  border: 1px solid #dfe7f3;
  border-radius: 10px;
  margin-bottom: 10px;
  padding: 12px;
  background: white;
}

.builder-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.builder-lesson {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.builder-lesson label:nth-child(2),
.builder-lesson label:nth-child(3) {
  grid-column: span 2;
}

.builder-section button,
.builder-lesson button {
  border: 1px solid #dce5f2;
  border-radius: 8px;
  padding: 8px 12px;
  background: white;
  font-weight: 850;
  cursor: pointer;
}

.video-frame {
  position: relative;
}

.video-frame::after {
  content: attr(data-watermark);
  position: absolute;
  right: 14px;
  bottom: 12px;
  z-index: 2;
  border-radius: 999px;
  padding: 6px 10px;
  color: rgba(255, 255, 255, 0.84);
  background: rgba(15, 23, 42, 0.42);
  font-size: 0.78rem;
  font-weight: 900;
  pointer-events: none;
}

.lesson-preview-tag {
  display: inline-flex;
  margin-left: 8px;
  border-radius: 999px;
  padding: 3px 8px;
  color: #2563eb;
  background: #eff6ff;
  font-size: 0.75rem;
  font-weight: 900;
}

.curriculum-card li p {
  margin: 6px 0 0;
  color: #64748b;
  font-weight: 700;
}

@media (max-width: 980px) {
  .admin-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .admin-stats,
  .admin-grid,
  .admin-note-grid {
    grid-template-columns: 1fr;
  }

  .admin-stat-card.revenue {
    grid-column: auto;
  }

  .admin-course-form {
    position: static;
  }
}

@media (max-width: 640px) {
  .admin-form-grid {
    grid-template-columns: 1fr;
  }

  .admin-form-grid .span-2 {
    grid-column: auto;
  }
}

/* ===== Site settings overrides (admin-configurable via /admin/site-settings) =====
   Placed last on purpose so these variable-driven rules win over the fixed values
   defined earlier in this file, without having to touch every duplicate rule above. */

body {
  color: var(--text-color, #16202a);
  background: var(--page-bg, #ffffff);
  font-size: var(--base-font-size, 16px);
}

.main-nav {
  font-size: var(--menu-font-size, 15px);
}

.site-header {
  min-height: var(--header-height, 84px);
}

.welcome-card h1 {
  font-size: clamp(1.5rem, 2.4vw, var(--hero-title-size, 36px));
}

.section-heading h2 {
  font-size: clamp(1.3rem, 2vw, var(--section-title-size, 26px));
  font-weight: var(--heading-weight, 800);
}

.course-body h3 {
  font-size: var(--course-title-size, 17px);
}

.section.muted {
  background: var(--section-bg, #f6f8fc);
}

.course-card {
  border-radius: var(--card-radius, 8px);
  box-shadow: var(--card-shadow, none);
}

.course-thumb {
  border-radius: var(--card-image-radius, 14px) var(--card-image-radius, 14px) 0 0;
}

.course-thumb img {
  height: var(--card-image-height, 190px);
}

.course-body {
  padding: var(--card-padding, 18px);
}

.course-actions .primary-button,
.course-actions .secondary-button {
  font-size: var(--card-button-font-size, 14px);
}

.course-quick-buy,
[data-buy],
#createOrderBtn {
  background: var(--buy-button-color, var(--accent-color, #f97316));
}

body.buttons-vertical .course-actions,
.course-actions.vertical {
  grid-template-columns: 1fr;
}

.category-grid,
.course-layout,
.section-heading {
  width: min(var(--container-width, 1180px), 100%);
}

@media (min-width: 921px) {
  .course-grid {
    grid-template-columns: repeat(var(--courses-per-row, 4), 1fr);
  }

  .hero {
    min-height: var(--hero-height, 460px);
  }
}

/* Admin: /admin/site-settings form + live preview */
.admin-settings-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: start;
}

.admin-settings-group {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.admin-settings-group:first-child {
  padding-top: 0;
}

.admin-settings-group:last-child {
  border-bottom: 0;
}

.admin-settings-group h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.admin-settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.admin-settings-actions .primary-button,
.admin-settings-actions .secondary-button {
  width: auto;
}

.switch-field {
  display: flex !important;
  align-items: center;
  gap: 8px !important;
  font-weight: 700;
}

.switch-field input {
  width: auto;
}

.field-hint {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
}

.admin-settings-preview {
  position: sticky;
  top: 20px;
  align-self: start;
}

.settings-preview-box {
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: #fafbfc;
}

.settings-preview-box .course-card {
  max-width: 280px;
  margin: 0 auto;
  border-radius: var(--preview-radius, 8px);
  box-shadow: var(--preview-shadow, none);
}

.settings-preview-box .course-thumb {
  border-radius: var(--preview-image-radius, 14px) var(--preview-image-radius, 14px) 0 0;
}

.settings-preview-box .course-thumb img {
  height: var(--preview-image-height, 190px);
}

.settings-preview-box .course-body {
  padding: var(--preview-padding, 18px);
}

.settings-preview-box .course-body h3 {
  font-size: var(--preview-title-size, 17px);
}

.settings-preview-box .course-actions .primary-button,
.settings-preview-box .course-actions .secondary-button {
  font-size: var(--preview-button-font, 14px);
}

.settings-preview-box .course-actions.vertical {
  grid-template-columns: 1fr;
}

.settings-preview-box #previewPrimaryBtn {
  background: var(--preview-buy, #f97316);
}

@media (max-width: 980px) {
  .admin-settings-layout {
    grid-template-columns: 1fr;
  }

  .admin-settings-preview {
    position: static;
  }
}