:root {
  --bg: #f1f3f9;
  --surface: #ffffff;
  --surface-soft: #f6f7fb;
  --text: #161c2a;
  --muted: #687083;
  --border: #e1e5ee;
  --accent: #247bfe;
  --accent-dark: #115dcc;
  --accent-soft: #eaf2ff;
  --warning: #976a00;
  --yellow: #ffdc34;
  --red: #ff2954;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 12px 34px rgba(33, 44, 76, 0.08);
  --container: 1240px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at 8% 0%, rgba(36, 123, 254, 0.12), transparent 30%),
    radial-gradient(circle at 92% 4%, rgba(255, 220, 52, 0.18), transparent 22%),
    linear-gradient(180deg, #f5f6fb 0%, var(--bg) 100%);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: inherit;
}

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

.site-shell {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
  padding: 20px 0 40px;
}

.surface-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(225, 229, 238, 0.96);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.topbar-wrap {
  position: sticky;
  top: 16px;
  z-index: 20;
  margin-bottom: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  position: relative;
  overflow: hidden;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 50%;
  background: var(--accent);
}

.brand-mark span {
  position: absolute;
  border-radius: 50%;
}

.brand-mark-blue {
  inset: 0;
  background: linear-gradient(145deg, #3268ff 0%, #1f9bff 100%);
}

.brand-mark-yellow {
  width: 31px;
  height: 31px;
  right: -3px;
  top: -2px;
  background: var(--yellow);
}

.brand-mark-red {
  width: 25px;
  height: 25px;
  left: -4px;
  bottom: -4px;
  background: var(--red);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 18px;
  line-height: 1.1;
}

.brand-text small {
  font-size: 12px;
  color: var(--muted);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-link,
.nav-dropdown > summary {
  list-style: none;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.nav-dropdown > summary::-webkit-details-marker {
  display: none;
}

.nav-link:hover,
.nav-dropdown > summary:hover,
.nav-link.active,
.nav-dropdown.active > summary {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown > summary::after {
  content: "▾";
  margin-left: 8px;
  color: var(--muted);
  font-size: 11px;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 260px;
  display: grid;
  gap: 4px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(21, 33, 30, 0.12);
}

.dropdown-link {
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
}

.dropdown-link:hover,
.dropdown-link:focus-visible {
  background: var(--surface-soft);
  color: var(--accent-dark);
  outline: none;
}

.dropdown-link-muted {
  color: var(--muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.channel-link,
.mobile-channel-link {
  text-decoration: none;
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 14px;
}

.channel-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 12px;
  background: var(--accent) !important;
  color: #fff !important;
  border: 1px solid var(--accent) !important;
  box-shadow: 0 10px 24px rgba(36, 123, 254, 0.2);
}

.channel-button:hover {
  background: var(--accent-dark) !important;
  color: #fff !important;
}

.mobile-menu-btn {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  font-family: inherit;
  font-weight: 700;
}

.mobile-menu {
  margin-top: 12px;
  padding: 14px 16px;
}

.mobile-nav {
  display: grid;
  gap: 10px;
}

.mobile-group,
.mobile-link {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--surface-soft);
  text-decoration: none;
}

.mobile-group summary {
  cursor: pointer;
  font-weight: 700;
}

.mobile-group a {
  display: block;
  margin-top: 8px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
}

.hero-grid,
.cards-grid-two {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(340px, 0.9fr);
  gap: 24px;
}

.landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.95fr);
  gap: 24px;
  padding: 34px;
}

.landing-hero-copy {
  display: grid;
  align-content: start;
}

.landing-eyebrow {
  width: fit-content;
  margin: 0;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.2;
}

.landing-display-title {
  margin-top: 16px;
  font-size: clamp(36px, 4.2vw, 60px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.04em;
  max-width: none;
}

.landing-title-line {
  display: block;
}

.landing-lead {
  margin-top: 18px;
  max-width: 58ch;
  font-size: 18px;
  color: #4c556b;
}

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

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

.landing-perk-card,
.review-card {
  padding: 20px;
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f8ff 100%);
  border: 1px solid var(--border);
}

.landing-perk-card:nth-child(2) {
  background: linear-gradient(180deg, #ffffff 0%, #fffbe8 100%);
}

.landing-perk-card:nth-child(3) {
  background: linear-gradient(180deg, #ffffff 0%, #fff1f4 100%);
}

.landing-perk-card h3 {
  margin-bottom: 8px;
}

.landing-speaker {
  display: grid;
  grid-template-columns: minmax(260px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 28px;
}

.landing-speaker-photo-wrap {
  max-width: 360px;
  width: 100%;
  justify-self: start;
  padding: 10px;
  border-radius: 20px;
  background: linear-gradient(145deg, #eaf2ff 0%, #fff8d5 60%, #ffe9ee 100%);
}

.landing-speaker .teacher-photo {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.landing-speaker-copy {
  display: grid;
  gap: 18px;
}

.landing-speaker-summary {
  display: grid;
  gap: 12px;
  max-width: 64ch;
}

.landing-speaker-summary p {
  margin: 0;
}

.landing-speaker-summary a {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
}

.landing-speaker-summary a:hover {
  text-decoration: underline;
}

.review-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 300px;
  min-height: 300px;
  overflow: hidden;
  scroll-snap-align: start;
}

.reviews-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slider-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
}

.slider-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.slider-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.reviews-slider {
  display: grid;
  gap: 16px;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - 48px) / 4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  align-items: stretch;
  grid-auto-rows: 1fr;
}

.reviews-slider::-webkit-scrollbar {
  display: none;
}

.review-title {
  font-size: clamp(18px, 1.6vw, 24px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.review-quote {
  margin-top: auto;
  color: var(--muted);
  font-size: 14px;
  font-style: italic;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 7;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hero-copy,
.hero-side,
.page-intro,
.detail-hero,
.detail-section,
.section-card,
.item-card,
.course-card,
.checklist-card,
.footer {
  padding: 28px;
}

.hero-copy {
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  width: 150px;
  height: 150px;
  right: -58px;
  top: -58px;
  border-radius: 50%;
  background: conic-gradient(from 210deg, var(--red) 0 24%, var(--accent) 24% 68%, var(--yellow) 68% 100%);
  opacity: 0.13;
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(34px, 4vw, 54px);
  margin-top: 18px;
  letter-spacing: -0.03em;
}

.hero-copy h1 {
  font-size: clamp(28px, 2.9vw, 42px);
}

.hero-title-line {
  display: block;
}

.hero-title-line-nowrap {
  white-space: nowrap;
}

h2 {
  font-size: clamp(24px, 2.4vw, 34px);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 20px;
  letter-spacing: -0.02em;
}

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

.hero-lead {
  margin-top: 16px;
  max-width: 58ch;
  font-size: 18px;
  color: #4c556b;
}

.teacher-name {
  margin-top: 28px;
}

.teacher-role {
  margin-top: 10px;
  color: var(--accent-dark);
  font-weight: 700;
}

.hero-summary {
  margin-top: 12px;
  max-width: 58ch;
}

.stats-grid,
.cards-grid {
  display: grid;
  gap: 16px;
}

.stats-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
}

.stat-card {
  padding: 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #f5f8ff 100%);
  border: 1px solid var(--border);
}

.stat-card strong {
  display: block;
  font-size: 18px;
  margin-bottom: 6px;
}

.stat-card span {
  color: var(--muted);
  font-size: 14px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-secondary {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.teacher-photo-wrap {
  overflow: hidden;
  border-radius: 20px;
  background: linear-gradient(145deg, #eaf2ff 0%, #fff8d5 60%, #ffe9ee 100%);
  padding: 10px;
  margin-bottom: 22px;
}

.teacher-photo {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  object-position: center 28%;
  border-radius: 16px;
}

.check-list,
.detail-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.check-list li,
.detail-list li {
  position: relative;
  padding-left: 22px;
  color: #465069;
}

.check-list li::before,
.detail-list li::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--accent);
  position: absolute;
  top: 9px;
  left: 0;
}

.section-block {
  margin-top: 24px;
}

.section-head {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.section-head-inline {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 16px;
}

.section-head-copy {
  display: grid;
  gap: 8px;
}

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

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

.section-card {
  text-decoration: none;
  display: grid;
  gap: 16px;
  min-height: 220px;
}

.section-link {
  font-weight: 700;
  color: var(--accent-dark);
}

.section-link-muted {
  color: #6f7f79;
}

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

.lecture-list-card {
  min-height: 230px;
}

.course-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 38px;
  padding: 0 12px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.course-link-muted {
  background: #f3f6f5;
  color: #6f7f79;
}

.course-number {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: grid;
  place-items: center;
  font-weight: 800;
}

.course-card:nth-child(3n + 2) .course-number {
  background: #fff6ca;
  color: #735400;
}

.course-card:nth-child(3n) .course-number {
  background: #ffe9ee;
  color: #b9153b;
}

.page-intro {
  margin-bottom: 24px;
}

.page-intro p {
  max-width: 62ch;
  margin-top: 12px;
}

.item-card {
  display: grid;
  gap: 16px;
  text-decoration: none;
  min-height: 230px;
}

.item-card-top,
.item-card-bottom,
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.status-published {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.status-coming-soon {
  background: #fff5c2;
  color: var(--warning);
}

.item-type,
.item-date,
.detail-meta span {
  font-size: 13px;
  color: var(--muted);
}

.item-card-bottom {
  margin-top: auto;
  justify-content: space-between;
}

.item-cta {
  font-weight: 700;
  color: var(--accent-dark);
}

.item-cta.muted {
  color: var(--warning);
}

.detail-hero,
.detail-section {
  margin-bottom: 20px;
}

.detail-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
}

.detail-head-copy {
  display: grid;
  gap: 14px;
  flex: 1;
  min-width: 0;
  max-width: none;
}

.detail-title-line {
  display: block;
}

.detail-title-line-nowrap {
  white-space: nowrap;
}

.detail-section h2,
.checklist-card h2 {
  margin-bottom: 14px;
}

.detail-section p + p {
  margin-top: 14px;
}

.solution-root-wrap {
  display: flex;
  justify-content: center;
  margin-top: 6px;
  padding-bottom: 28px;
  position: relative;
}

.solution-root-wrap::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 1px;
  height: 18px;
  background: rgba(47, 111, 99, 0.22);
}

.solution-primary-grid,
.solution-branch-grid {
  display: grid;
  gap: 14px;
}

.solution-primary-grid {
  position: relative;
  margin-top: 22px;
  padding-top: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.solution-primary-grid::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 1px;
  background: rgba(47, 111, 99, 0.16);
}

.solution-branches {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.solution-branch {
  padding: 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, #f8fbfa 0%, #f2f7f5 100%);
  border: 1px solid var(--border);
}

.solution-branch h3 {
  margin-bottom: 12px;
}

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

.solution-card {
  padding: 18px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--border);
  display: grid;
  gap: 12px;
}

.solution-card-root {
  width: min(100%, 420px);
  background: linear-gradient(135deg, var(--accent-soft) 0%, #f4fbf8 100%);
}

.solution-card-note {
  font-size: 14px;
}

.query-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.query-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: #44534e;
  font-size: 12px;
  line-height: 1.35;
}

.password-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 20px;
}

.password-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 27, 24, 0.34);
  backdrop-filter: blur(4px);
}

.password-modal-card {
  position: relative;
  z-index: 1;
  width: min(100%, 460px);
  padding: 28px;
}

.password-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.password-modal-kicker {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.password-modal-card h2 {
  margin: 0 0 10px;
}

.password-modal-text {
  margin: 0 0 18px;
  color: var(--muted);
}

.password-form {
  display: grid;
  gap: 12px;
}

.password-input {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
  font: inherit;
}

.password-input:focus {
  outline: 2px solid rgba(36, 123, 254, 0.18);
  border-color: rgba(36, 123, 254, 0.38);
}

.password-error {
  margin: 0;
  color: #b34343;
  font-size: 14px;
  font-weight: 600;
}

.password-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.back-link-wrap {
  margin-top: 4px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--accent-dark);
  font-weight: 700;
}

.back-link::before {
  content: "←";
}

.footer {
  display: block;
  margin-top: 28px;
  padding: 20px 24px;
}

.footer p {
  margin-top: 0;
  max-width: none;
}

.footer-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.55;
}

@media (max-width: 1100px) {
  .hero-grid,
  .cards-grid-two,
  .cards-grid-three,
  .cards-grid-four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid {
    align-items: start;
  }

  .landing-hero,
  .landing-speaker {
    grid-template-columns: 1fr;
  }

  .landing-perks {
    grid-template-columns: 1fr;
  }

  .reviews-slider {
    grid-auto-columns: calc((100% - 16px) / 2);
  }

  .solution-primary-grid,
  .solution-branch-grid {
    grid-template-columns: 1fr;
  }

  .solution-primary-grid::before,
  .solution-root-wrap::after {
    display: none;
  }
}

@media (max-width: 980px) {
  .site-shell {
    width: min(calc(100% - 24px), var(--container));
    padding-top: 14px;
  }

  .desktop-nav,
  .channel-link {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .topbar {
    padding: 14px;
  }

  .hero-grid,
  .cards-grid-two,
  .cards-grid-three,
  .cards-grid-four,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .section-head-inline {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .reviews-slider {
    grid-auto-columns: 86%;
  }

  .detail-head,
  .footer {
    flex-direction: column;
  }

  .detail-title-line-nowrap {
    white-space: normal;
  }
}

@media (max-width: 520px) {
  .hero-copy,
  .hero-side,
  .landing-hero,
  .page-intro,
  .detail-hero,
  .detail-section,
  .section-card,
  .item-card,
  .course-card,
  .checklist-card,
  .footer {
    padding: 20px;
  }

  .landing-speaker {
    padding: 20px;
  }

  .landing-hero {
    padding: 22px;
  }

  .landing-display-title {
    max-width: none;
    font-size: 38px;
  }

  .review-card {
    height: auto;
    min-height: 0;
  }

  .reviews-slider {
    grid-auto-columns: 92%;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 24px;
  }

  .brand-text small {
    display: none;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .hero-lead {
    font-size: 16px;
  }
}