:root {
  color-scheme: light;
  --bg: #e5ded3;
  --ink: #292929;
  --text: #292929;
  --muted: rgba(41, 41, 41, 0.68);
  --paper: #fcfcfc;
  --paper-deep: #e5ded3;
  --line: #292929;
  --line-soft: rgba(41, 41, 41, 0.16);
  --accent: #dd8217;
  --accent-soft: rgba(221, 130, 23, 0.16);
  --warn: #946018;
  --shadow: 0 24px 70px rgba(41, 41, 41, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: "Aptos", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    linear-gradient(90deg, rgba(41, 41, 41, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    radial-gradient(circle at 12% 4%, rgba(221, 130, 23, 0.16), transparent 28%),
    var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.site-header {
  border-bottom: 2px solid var(--line);
  background: rgba(229, 222, 211, 0.92);
  backdrop-filter: blur(14px);
}

.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 52px 24px 28px;
}

.header-topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  content: "";
}

.session-pill {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 10px 12px;
  color: var(--ink);
  font-size: 13px;
  text-transform: uppercase;
}

.session-pill strong {
  max-width: 240px;
  overflow-wrap: anywhere;
}

.session-pill a {
  color: var(--accent);
  font-weight: 900;
  text-decoration: none;
}

h1 {
  max-width: 920px;
  margin: 0;
  color: var(--ink);
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  font-size: clamp(58px, 10.4vw, 142px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 0.78;
  text-transform: uppercase;
}

h1 span {
  display: block;
}

.subtitle {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--text);
  font-size: clamp(16px, 2.2vw, 24px);
  line-height: 1.08;
}

.controls {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  max-width: 920px;
  margin-top: 44px;
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  background: rgba(252, 252, 252, 0.58);
}

.search-label {
  padding: 18px 18px 18px 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

#searchInput {
  width: 100%;
  min-width: 0;
  border: 0;
  border-left: 2px solid var(--line);
  border-radius: 0;
  outline: 0;
  background: transparent;
  padding: 18px 18px;
  color: var(--ink);
  font-size: 16px;
}

#searchInput::placeholder {
  color: rgba(41, 41, 41, 0.42);
}

#searchInput:focus {
  background: var(--paper);
  box-shadow: inset 0 0 0 2px var(--accent);
}

.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.stats-bar span {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 7px 10px;
  text-transform: uppercase;
}

.stats-bar strong {
  color: var(--ink);
  font-size: 18px;
  line-height: 1;
}

.app {
  max-width: 1180px;
  margin: 0 auto;
  padding: 26px 24px 72px;
}

.status {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 18px;
  box-shadow: var(--shadow);
}

.auth-body {
  min-height: 100vh;
}

.auth-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(100%, 540px);
  border: 2px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
  padding: 28px;
}

.auth-title {
  margin: 0;
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  font-size: clamp(36px, 8vw, 62px);
  line-height: 0.9;
  text-transform: uppercase;
}

.auth-copy {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.4;
}

.auth-alert {
  margin: 18px 0 0;
  border: 1px solid var(--line);
  padding: 14px 16px;
}

.auth-alert-error {
  background: #fff2ec;
  color: #7b2e13;
}

.auth-form {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.auth-field {
  display: grid;
  gap: 8px;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 13px;
}

.auth-field input {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  padding: 14px 16px;
  color: var(--ink);
  font-size: 16px;
  outline: 0;
}

.auth-field input:focus {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.auth-submit {
  border: 2px solid var(--line);
  background: var(--accent);
  padding: 16px 18px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 900;
  text-transform: uppercase;
  cursor: pointer;
}

.module {
  margin-bottom: 18px;
  border: 2px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.module > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: end;
  list-style: none;
  cursor: pointer;
  padding: 24px 26px;
  border-bottom: 2px solid var(--line);
  background: var(--paper);
}

.module > summary::-webkit-details-marker,
.lesson > summary::-webkit-details-marker {
  display: none;
}

.module-title {
  color: var(--ink);
  font-size: clamp(24px, 3.8vw, 44px);
  font-weight: 950;
  letter-spacing: 0;
  line-height: 0.94;
  text-transform: uppercase;
}

.module-count {
  min-width: max-content;
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
}

.module-body {
  padding: 0;
  background: var(--paper-deep);
}

.lesson {
  border: 0;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.lesson:last-child {
  border-bottom: 0;
}

.lesson > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: baseline;
  list-style: none;
  cursor: pointer;
  padding: 18px 26px;
  color: var(--ink);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.08;
}

.lesson > summary::before,
.module > summary::before {
  display: inline-block;
  color: var(--accent);
  content: "+";
}

.lesson > summary::before {
  grid-column: 1;
}

.lesson[open] > summary::before,
.module[open] > summary::before {
  content: "-";
}

.lesson-meta {
  grid-column: 2 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.lesson-title {
  grid-column: 2;
}

.lesson-count {
  grid-column: 3;
  min-width: max-content;
  border: 1px solid var(--line);
  background: var(--accent-soft);
  padding: 4px 8px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 950;
  line-height: 1;
  text-transform: uppercase;
}

.videos {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.video-card {
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(0, 1.22fr);
  gap: 20px;
  border-bottom: 1px solid var(--line-soft);
  padding: 24px 26px;
  background: var(--paper);
}

.video-card:last-child {
  border-bottom: 0;
}

.video-head {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  align-content: start;
  margin: 0;
}

.video-index {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border: 2px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 950;
  line-height: 1;
}

.video-title {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 950;
  line-height: 0.98;
  text-transform: uppercase;
}

.video-meta {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.video-meta code {
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.94em;
}

.video-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  grid-column: 1;
  margin: 14px 0 0 68px;
}

.video-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--ink);
  padding: 0 12px;
  color: var(--paper);
  font-size: 12px;
  font-weight: 900;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.video-links a:hover {
  background: var(--accent);
}

.badge-warn {
  display: inline-block;
  border: 1px solid rgba(221, 130, 23, 0.72);
  background: var(--accent-soft);
  padding: 7px 9px;
  color: var(--warn);
  font-size: 12px;
  font-weight: 800;
}

.summary-group {
  display: grid;
  gap: 10px;
  grid-column: 2;
  grid-row: 1 / span 2;
}

.summary-block {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.summary-block:first-child {
  border-top-width: 2px;
}

.summary-block h4 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 950;
  line-height: 1;
  text-transform: uppercase;
}

.summary-short,
.summary-full {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
  white-space: pre-wrap;
}

.summary-details {
  margin-top: 8px;
}

.summary-details summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .header-inner {
    padding: 34px 16px 22px;
  }

  .header-topbar {
    align-items: flex-start;
  }

  h1 {
    font-size: clamp(46px, 15vw, 86px);
  }

  .subtitle {
    font-size: 17px;
  }

  .controls {
    grid-template-columns: 1fr;
    margin-top: 30px;
  }

  .search-label {
    padding: 14px 0 8px;
  }

  #searchInput {
    border-top: 2px solid var(--line);
    border-left: 0;
    padding: 14px 12px;
  }

  .app {
    padding: 18px 12px 46px;
  }

  .module > summary {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px;
    padding: 18px 16px;
  }

  .module-count {
    grid-column: 2;
    font-size: 14px;
  }

  .lesson > summary {
    grid-template-columns: auto minmax(0, 1fr);
    padding: 16px;
    font-size: 16px;
  }

  .lesson-count {
    grid-column: 2;
    width: max-content;
  }

  .lesson-meta {
    grid-column: 2;
  }

  .video-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 18px 16px;
  }

  .video-head {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
  }

  .video-index {
    width: 44px;
    height: 44px;
    font-size: 17px;
  }

  .video-title {
    font-size: 18px;
  }

  .video-links {
    grid-column: auto;
    margin: 0 0 2px 56px;
  }

  .summary-group {
    grid-column: auto;
    grid-row: auto;
  }

  .session-pill {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding-top: 26px;
  }

  h1 {
    font-size: clamp(38px, 17vw, 64px);
  }

  .subtitle {
    font-size: 15px;
    line-height: 1.2;
  }

  .stats-bar span {
    flex: 1 1 100%;
    justify-content: space-between;
  }

  .module {
    border-width: 1px;
  }

  .module > summary {
    border-bottom-width: 1px;
  }

  .module-title {
    font-size: 23px;
  }

  .video-links {
    margin-left: 0;
  }
}