:root {
  --bg: #060913;
  --ink: #f8fafc;
  --muted: #94a3b8;
  --line: rgba(148, 163, 184, 0.18);
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --accent: #38bdf8;
  --accent-strong: #7dd3fc;
  --green: #34d399;
  --gold: #fbbf24;
  --blue: #38bdf8;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(56, 189, 248, 0.16), transparent 34rem),
    radial-gradient(circle at 85% 8%, rgba(52, 211, 153, 0.09), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 9, 19, 0.78);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  gap: 24px;
}

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

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

.brand-title,
.brand-subtitle {
  display: block;
}

.brand-title {
  color: #ffffff;
  line-height: 1.1;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 600;
}

.nav-links {
  gap: 22px;
  color: #cbd5e1;
  font-size: 0.95rem;
  font-weight: 600;
}

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

.nav-action,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
}

.nav-action {
  border: 1px solid rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-strong);
  font-size: 0.92rem;
}

.hero {
  position: relative;
  display: grid;
  min-height: 620px;
  overflow: hidden;
  background: #060913;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 9, 19, 0.98), rgba(6, 9, 19, 0.82), rgba(6, 9, 19, 0.35)),
    url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1800&q=80") center/cover;
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 34%;
  background: linear-gradient(180deg, transparent, var(--bg));
}

.data-grid {
  position: absolute;
  right: 8vw;
  top: 18vh;
  display: grid;
  grid-template-columns: repeat(4, 78px);
  gap: 12px;
  opacity: 0.78;
}

.data-grid span {
  height: 56px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.data-grid span:nth-child(3n) {
  background: rgba(200, 139, 45, 0.45);
}

.data-grid span:nth-child(4n) {
  background: rgba(56, 189, 248, 0.32);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 116px;
  align-self: center;
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.15rem;
  line-height: 1.7;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button.primary {
  border: 1px solid var(--accent);
  background: rgba(56, 189, 248, 0.16);
  color: var(--accent-strong);
}

.button.primary:hover {
  background: rgba(56, 189, 248, 0.24);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.button.disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.tabs-shell {
  width: min(1120px, calc(100% - 32px));
  margin: -54px auto 0;
  position: relative;
  z-index: 3;
}

.tabs {
  display: flex;
  width: fit-content;
  max-width: 100%;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.tab {
  min-width: 104px;
  min-height: 42px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.tab.is-active {
  background: rgba(56, 189, 248, 0.16);
  color: var(--accent-strong);
}

.tab-panel {
  padding: 86px 0 22px;
  scroll-margin-top: 92px;
}

.specialization-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 22px;
  align-items: stretch;
}

.specialization-copy,
.specialization-card,
.waitlist-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.specialization-copy {
  padding: clamp(24px, 4vw, 38px);
}

.specialization-copy h2 {
  max-width: 860px;
  margin: 0;
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.price-box {
  display: grid;
  gap: 4px;
  width: fit-content;
  margin-top: 22px;
  border: 1px solid rgba(56, 189, 248, 0.28);
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.08);
  padding: 16px 18px;
}

.price-box span {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
}

.price-box del {
  color: #94a3b8;
  font-weight: 800;
}

.price-box strong {
  color: var(--accent-strong);
  font-size: 1.3rem;
}

.specialization-copy p:not(.eyebrow),
.specialization-actions span {
  color: var(--muted);
  line-height: 1.75;
}

.specialization-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}

.specialization-card {
  padding: 28px;
}

.specialization-modules {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.specialization-modules > li {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  padding: 0;
}

.module-button {
  width: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  line-height: 1.4;
  padding: 16px;
  text-align: left;
}

.module-button:hover,
.module-button.is-active {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-strong);
}

.module-detail {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  padding: 18px;
}

.module-detail[hidden] {
  display: none;
}

.module-detail h3 {
  margin: 0;
  color: #ffffff;
  font-size: 1.18rem;
}

.module-detail p {
  color: var(--muted);
  line-height: 1.6;
}

.module-detail ol {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 20px;
  color: #cbd5e1;
}

.module-detail li {
  line-height: 1.45;
}

.waitlist-form {
  margin-top: 22px;
  padding: 28px;
}

.waitlist-form[hidden] {
  display: none;
}

.section-heading.compact {
  margin-bottom: 20px;
}

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

.form-grid label {
  display: grid;
  gap: 8px;
  color: #ffffff;
  font-weight: 800;
}

.form-grid input,
.form-grid select {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  font: inherit;
  padding: 0 14px;
}

.form-grid select option {
  color: #111827;
}

.form-grid input:focus,
.form-grid select:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(56, 189, 248, 0.14);
}

.form-grid-full {
  grid-column: 1 / -1;
}

.waitlist-form .button {
  margin-top: 18px;
}

.section-heading {
  max-width: 660px;
  margin-bottom: 28px;
}

.section-heading h2,
.download-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0;
}

.section-heading p,
.download-copy p,
.course-body p,
.youtube-item p,
.podcast-body p {
  color: var(--muted);
  line-height: 1.65;
}

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

.course-card,
.youtube-item,
.podcast-item {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 30px rgba(23, 32, 29, 0.08);
  backdrop-filter: blur(14px);
}

.course-card {
  cursor: pointer;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.course-card:hover,
.course-card:focus-visible,
.course-card.is-selected {
  border-color: rgba(17, 106, 99, 0.56);
  box-shadow: 0 18px 44px rgba(56, 189, 248, 0.12);
  transform: translateY(-2px);
}

.course-card:focus-visible {
  outline: 3px solid rgba(200, 139, 45, 0.55);
  outline-offset: 3px;
}

.course-card.is-selected .text-button {
  background: rgba(56, 189, 248, 0.16);
  color: var(--accent-strong);
}

.video-placeholder,
.youtube-placeholder {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(6, 9, 19, 0.96), rgba(56, 189, 248, 0.34), rgba(52, 211, 153, 0.2)),
    repeating-linear-gradient(90deg, transparent 0 28px, rgba(255, 255, 255, 0.16) 28px 29px);
  color: #ffffff;
  text-align: center;
}

.video-placeholder {
  gap: 8px;
}

.video-placeholder p {
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  font-weight: 800;
}

.play-icon {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #ffffff;
  position: relative;
}

.play-icon::after {
  content: "";
  position: absolute;
  left: 22px;
  top: 16px;
  border-left: 17px solid var(--accent);
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
}

.course-body,
.youtube-item {
  padding: 22px;
}

.tag {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.course-body h3,
.youtube-item h3,
.podcast-body h3 {
  margin: 0;
  font-size: 1.25rem;
}

.text-button {
  min-height: 40px;
  margin-top: 8px;
  border: 0;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  color: var(--accent-strong);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0 14px;
}

.course-inline-detail {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  padding: 0 22px 22px;
}

.course-inline-detail h4 {
  margin: 0 0 14px;
  font-size: 1.08rem;
}

.course-inline-detail ol {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.55;
}

.course-inline-detail[hidden] {
  display: none;
}

.start-course {
  width: 100%;
}

.download-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  align-items: center;
  gap: 42px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.book-cover {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 420px;
  border-radius: 8px;
  padding: 28px;
  background:
    linear-gradient(145deg, rgba(6, 9, 19, 0.96), rgba(56, 189, 248, 0.22), rgba(52, 211, 153, 0.18)),
    linear-gradient(45deg, rgba(255, 255, 255, 0.14), transparent);
  color: #ffffff;
}

.book-cover span {
  width: fit-content;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 800;
}

.book-cover strong {
  font-size: 2.2rem;
  line-height: 1.05;
}

.download-copy {
  max-width: 620px;
}

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

.youtube-placeholder {
  margin: -22px -22px 20px;
  font-size: 1.4rem;
  font-weight: 800;
}

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

.podcast-item {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  min-height: 220px;
}

.podcast-cover {
  display: grid;
  place-items: center;
  min-height: 100%;
  background:
    radial-gradient(circle at 38% 34%, rgba(255, 255, 255, 0.3), transparent 28%),
    linear-gradient(145deg, rgba(200, 139, 45, 0.95), rgba(17, 106, 99, 0.95));
  color: #ffffff;
  font-weight: 800;
}

.podcast-cover span {
  display: grid;
  place-items: center;
  width: 86px;
  height: 86px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
}

.podcast-body {
  padding: 24px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(1120px, calc(100% - 32px));
  margin: 50px auto 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
  padding-top: 24px;
}

.site-footer strong {
  display: block;
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 6px;
}

.site-footer p {
  margin: 0;
  max-width: 520px;
}

.site-footer address {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  font-style: normal;
}

.site-footer a,
.site-footer span {
  color: var(--accent-strong);
  font-weight: 800;
}

.lead-form,
.auth-form {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.lead-form label,
.auth-form label {
  color: #ffffff;
  font-weight: 800;
}

.lead-form input,
.auth-form input {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  font: inherit;
  padding: 0 14px;
}

.lead-form input:focus,
.auth-form input:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(56, 189, 248, 0.14);
}

.form-status {
  min-height: 22px;
  color: var(--accent-strong);
  font-weight: 700;
}

.lesson-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 22% 0%, rgba(56, 189, 248, 0.12), transparent 30rem),
    #060913;
}

.lesson-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 9, 19, 0.86);
  backdrop-filter: blur(16px);
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  min-height: calc(100vh - 72px);
}

.lesson-sidebar {
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  padding: 28px 22px;
  overflow-y: auto;
}

.lesson-sidebar h1 {
  margin: 0;
  font-size: 1.55rem;
  line-height: 1.15;
}

.lesson-sidebar p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.6;
}

.sidebar-title {
  margin: 22px 0 0;
  font-size: 1rem;
}

.lesson-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.lesson-link {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  width: 100%;
  min-height: 68px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  padding: 14px;
  text-align: left;
}

.lesson-link span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-strong);
  font-weight: 800;
}

.lesson-link strong {
  align-self: center;
  font-size: 0.96rem;
  line-height: 1.35;
}

.lesson-link:hover,
.lesson-link.is-active {
  border-color: rgba(56, 189, 248, 0.5);
  background: rgba(56, 189, 248, 0.08);
}

.lesson-link.is-active span {
  background: rgba(56, 189, 248, 0.18);
  color: var(--accent-strong);
}

.lesson-main {
  padding: 28px;
}

.watchbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.watchbar h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.2rem);
  letter-spacing: 0;
}

.report-button {
  width: fit-content;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0 14px;
}

.video-stage {
  overflow: hidden;
  border-radius: 8px;
  background: #060913;
  box-shadow: var(--shadow);
}

.video-large-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  min-height: min(62vh, 650px);
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(6, 9, 19, 0.98), rgba(56, 189, 248, 0.3), rgba(52, 211, 153, 0.18)),
    repeating-linear-gradient(90deg, transparent 0 42px, rgba(255, 255, 255, 0.12) 42px 43px);
  color: #ffffff;
  text-align: center;
}

.video-large-placeholder p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.1rem;
  font-weight: 800;
}

.forum-panel {
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  padding: 22px;
}

.forum-heading h3 {
  margin: 0;
  font-size: 1.35rem;
}

.forum-form {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.forum-form label {
  font-weight: 800;
}

.forum-form textarea,
.reply-form textarea {
  width: 100%;
  min-height: 104px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  color: #ffffff;
  font: inherit;
  padding: 14px;
}

.forum-form textarea::placeholder,
.reply-form textarea::placeholder {
  color: #94a3b8;
}

.reply-form textarea {
  min-height: 82px;
}

.forum-form textarea:focus,
.reply-form textarea:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(17, 106, 99, 0.16);
}

.forum-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.forum-post {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
  padding: 16px;
}

.forum-post p {
  color: var(--muted);
  line-height: 1.6;
}

.answers-list {
  display: grid;
  gap: 10px;
  margin: 12px 0;
}

.answer-item {
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.04);
  padding: 10px 12px;
}

.answer-item p {
  margin-bottom: 0;
}

.reply-form {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.reply-form label {
  font-weight: 800;
}

.reply-button {
  min-height: 34px;
  border: 0;
  border-radius: 8px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-strong);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 0 12px;
}

.auth-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 4%, rgba(56, 189, 248, 0.16), transparent 34rem),
    radial-gradient(circle at 82% 10%, rgba(52, 211, 153, 0.1), transparent 28rem),
    #060913;
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 42px;
  align-items: center;
  width: min(1120px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 48px 0;
}

.auth-copy h1 {
  max-width: 680px;
  margin: 28px 0 0;
  color: #ffffff;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1;
}

.auth-copy p:not(.eyebrow) {
  max-width: 560px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.auth-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow);
  padding: 24px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 20px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.auth-tab {
  min-height: 42px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.auth-tab.is-active {
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent-strong);
}

.empty-state {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 820px) {
  .nav {
    min-height: 66px;
  }

  .nav-links {
    display: none;
  }

  .nav-action {
    min-height: 40px;
    padding: 0 13px;
  }

  .hero {
    min-height: 660px;
  }

  .hero-media {
    background:
      linear-gradient(180deg, rgba(6, 9, 19, 0.94), rgba(6, 9, 19, 0.64)),
      url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1100&q=80") center/cover;
  }

  .data-grid {
    right: 16px;
    top: auto;
    bottom: 100px;
    grid-template-columns: repeat(3, 58px);
    gap: 9px;
  }

  .data-grid span {
    height: 42px;
  }

  .hero-content {
    padding: 48px 0 112px;
  }

  .hero-copy {
    font-size: 1rem;
  }

  .tabs-shell {
    margin-top: -62px;
  }

  .lesson-layout {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .course-grid,
  .youtube-grid,
  .podcast-grid,
  .podcast-item,
  .specialization-hero,
  .download-layout {
    grid-template-columns: 1fr;
  }

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

  .podcast-cover {
    min-height: 128px;
  }

  .podcast-cover span {
    width: 70px;
    height: 70px;
  }

  .podcast-body {
    padding: 20px;
  }

  .download-layout {
    padding: 20px;
  }

  .book-cover {
    min-height: 300px;
  }

  .lesson-header {
    padding: 0 16px;
  }

  .lesson-sidebar {
    padding: 22px 16px;
  }

  .lesson-main {
    padding: 18px;
  }

  .watchbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .video-large-placeholder {
    min-height: 260px;
  }

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

@media (max-width: 520px) {
  .brand span:last-child {
    display: none;
  }

  .tabs {
    width: 100%;
  }

  .tab {
    flex: 1;
    min-width: 0;
  }

  .button {
    width: 100%;
  }

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

  .lesson-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}
  background: rgba(255, 255, 255, 0.055);
  color: #ffffff;