@font-face {
  font-family: "Sylexiad Sans";
  src: url("../fonts/SylexiadSansMedium.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sylexiad Sans";
  src: url("../fonts/SylexiadSansMedium-Italic.woff") format("woff");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sylexiad Sans";
  src: url("../fonts/SylexiadSansMedium-Bold.woff") format("woff");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Sylexiad Sans";
  src: url("../fonts/SylexiadSansMedium-BoldItalic.woff") format("woff");
  font-style: italic;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: light dark;
  --bg: #FFFCF6;
  --panel: #ffffff;
  --panel-strong: #F6F0EA;
  --text: #2A2430;
  --muted: #7A6C78;
  --line: #C9B7BF;
  --accent: #51305A;
  --accent-strong: #9E7D71;
  --accent-soft: #f4e9fc;
  --link: #51305A;
  --link-hover: #7A596D;
  --danger: #b42318;
  --shadow: 0 16px 45px rgba(31, 42, 55, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1F2A37;
    --panel: #253241;
    --panel-strong: #2A3645;
    --text: #EAEAEA;
    --muted: #AAB5C0;
    --line: #4A5A6A;
    --accent: #51305A;
    --accent-strong: #9E7D71;
    --accent-soft: #3A4A5A;
    --link: #E4D2F9;
    --link-hover: #FFFFFF;
    --shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
  }
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #FFFCF6;
  --panel: #ffffff;
  --panel-strong: #F6F0EA;
  --text: #2A2430;
  --muted: #7A6C78;
  --line: #C9B7BF;
  --accent: #51305A;
  --accent-strong: #9E7D71;
  --accent-soft: #f4e9fc;
  --link: #51305A;
  --link-hover: #7A596D;
  --shadow: 0 16px 45px rgba(31, 42, 55, 0.10);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1F2A37;
  --panel: #253241;
  --panel-strong: #2A3645;
  --text: #EAEAEA;
  --muted: #AAB5C0;
  --line: #4A5A6A;
  --accent: #51305A;
  --accent-strong: #9E7D71;
  --accent-soft: #3A4A5A;
  --link: #E4D2F9;
  --link-hover: #FFFFFF;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--bg), var(--panel-strong));
  color: var(--text);
  font-family: "Sylexiad Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  padding-top: 76px;
}

main#main { flex: 1 0 auto; }

a { color: var(--link); }
a:hover { color: var(--link-hover); }

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(49, 49, 49, 0.20);
  transition: background 0.18s, color 0.18s, filter 0.18s;
}

.button-link.secondary,
button.secondary {
  border-color: #111111;
  background: #ffffff;
  color: #111111;
}

button:not(.link-button):not(.theme-toggle):hover,
button:not(.link-button):not(.theme-toggle):focus-visible,
.button-link:hover,
.button-link:focus-visible {
  border-color: #111111;
  background: #F6F0EA;
  color: #111111;
  filter: brightness(1.07);
  text-decoration: none;
}

button:focus-visible,
.button-link:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 3px;
}

.link-button {
  min-height: auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--link);
  box-shadow: none;
  font-weight: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  padding: 10px 12px;
}

input[type="radio"],
input[type="checkbox"] {
  width: auto;
  min-width: 0;
  padding: 0;
  accent-color: var(--accent);
}

textarea { min-height: 120px; }
label { font-weight: 700; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  background: var(--accent);
  border-bottom: 1px solid var(--line);
  margin: 0;
  padding: 0;
  overflow-x: clip;
}

.site-header .nav {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.logo {
  width: auto;
  height: 96px;
  max-width: 220px;
  object-fit: contain;
  display: block;
  margin: 0;
}

.brand-txt {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  min-width: 0;
  line-height: 1.05;
  margin-left: 2px;
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #f4e9fc;
  letter-spacing: 0;
  white-space: nowrap;
  line-height: 1.05;
}

.brand-tagline {
  font-size: 0.72rem;
  color: #e4d2f9;
  font-weight: 500;
  opacity: 0.9;
  white-space: nowrap;
}

#nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.hamburger {
  display: none;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #FFFFFFD1;
  box-shadow: 0 10px 24px var(--shadow);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  transition: 0.2s ease;
  position: relative;
}

.hamburger span {
  width: 20px;
  height: 2.5px;
  border-radius: 999px;
  background: var(--accent);
}

.site-header nav > ul {
  list-style: none;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

.site-header nav a,
.site-header nav .nav-action,
.site-header nav .theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  padding: 7px 13px;
  border-radius: 999px;
  color: #f4e9fc;
  border: none;
  background: none;
  box-shadow: none;
  font-family: inherit;
  font-size: 1em;
  line-height: inherit;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  outline: none;
  cursor: pointer;
}

.site-header nav a:hover,
.site-header nav a:focus-visible,
.site-header nav .nav-action:hover,
.site-header nav .nav-action:focus-visible,
.site-header nav .theme-toggle:hover,
.site-header nav .theme-toggle:focus-visible,
.site-header nav a.is-current {
  background: var(--accent-strong);
  color: #FFFFFF;
}

.nav-form,
.theme-form {
  margin: 0;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 34px auto 70px;
}

.auth-shell {
  min-height: calc(100vh - 64px);
  display: grid;
  place-items: center;
  padding: 24px;
}

.landing-shell {
  min-height: calc(100vh - 64px);
  padding: 72px 24px 80px;
}

.landing-intro,
.landing-purpose {
  width: min(920px, 100%);
  margin-inline: auto;
}

.landing-intro h1 {
  max-width: 18ch;
  margin: 0;
  font-size: 3.25rem;
  line-height: 1.05;
}

.landing-kicker {
  margin: 14px 0 0;
  color: var(--accent-strong);
  font-size: 1.35rem;
  font-weight: 700;
}

.landing-description {
  max-width: 68ch;
  margin: 24px 0 0;
  font-size: 1.12rem;
}

.landing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.landing-purpose {
  margin-top: 72px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.landing-purpose h2 {
  margin: 0;
  font-size: 1.5rem;
}

.landing-purpose p {
  max-width: 72ch;
  margin: 14px 0 0;
}

.auth-panel,
.form-panel,
.result-panel,
.course-card,
.admin-columns article,
.module-block,
.lesson-content,
.resource-panel,
.quiz-panel,
.viewer-block,
.video-placeholder {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-panel {
  width: min(430px, 100%);
  padding: 28px;
  text-align: center;
}

.auth-logo {
  display: block;
  max-width: 240px;
  max-height: 70px;
  object-fit: contain;
  margin: 0 auto 18px;
}

.auth-panel .stack-form {
  text-align: left;
}

.auth-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 18px;
}

.registration-actions {
  display: grid;
  justify-items: center;
  gap: 16px;
  margin-top: 24px;
}

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

.stack-form p {
  display: grid;
  gap: 6px;
  margin: 0;
}

.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 24px;
}

.page-heading h1,
.auth-panel h1,
.form-panel h1,
.result-panel h1 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--link);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

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

.course-grid,
.stats-grid,
.admin-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 18px;
}

.course-card,
.admin-columns article,
.form-panel,
.result-panel {
  padding: 22px;
}

.progress-row,
.viewer-toolbar,
.admin-row,
.lesson-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.meter {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--panel-strong);
  margin: 14px 0 18px;
}

.meter span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.lesson-list,
.module-block {
  display: grid;
  gap: 12px;
}

.module-block { padding: 18px; }
.module-block.compact { margin-top: 14px; box-shadow: none; }

.lesson-row,
.admin-row {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  text-decoration: none;
}

.lesson-row small,
.admin-row small {
  display: block;
  color: var(--muted);
}

.admin-row small a + a {
  margin-left: 10px;
}

.lesson-shell {
  display: grid;
  grid-template-columns: minmax(230px, 310px) minmax(0, 1fr);
  gap: 18px;
  width: min(1600px, calc(100% - 24px));
  margin: 18px auto 60px;
}

.lesson-sidebar {
  position: sticky;
  top: 82px;
  align-self: start;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.lesson-sidebar h1 {
  font-size: 1.4rem;
}

.lesson-main {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.lesson-content,
.resource-panel,
.quiz-panel,
.viewer-block,
.video-placeholder {
  min-width: 0;
  max-width: 100%;
}

.viewer-block,
.lesson-content,
.resource-panel,
.video-placeholder,
.quiz-panel {
  padding: 14px;
}

.lesson-content,
.resource-panel,
.quiz-panel {
  padding: clamp(18px, 3vw, 30px);
}

.lesson-content h2,
.resource-panel h2,
.quiz-panel h2 {
  margin-top: 0;
}

.quiz-panel .stack-form p {
  gap: 10px;
}

.quiz-panel ul {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.quiz-panel div[id^="id_question_"] {
  display: grid;
  gap: 10px;
}

.quiz-panel li,
.quiz-panel div[id^="id_question_"] > div {
  margin: 0;
}

.quiz-panel li label,
.quiz-panel div[id^="id_question_"] label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel-strong);
  font-weight: 400;
  cursor: pointer;
  min-width: 0;
}

.quiz-panel input[type="radio"] {
  flex: 0 0 1rem;
  margin: 0.25em 0 0;
}

.prose {
  max-width: min(74ch, 100%);
  font-size: 1.05rem;
  min-width: 0;
  overflow-wrap: break-word;
}

.prose p {
  margin: 0 0 1rem;
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose h3,
.prose h4,
.prose h5 {
  margin: 1.6rem 0 0.7rem;
  line-height: 1.2;
}

.prose ul,
.prose ol {
  margin: 0 0 1rem 1.2rem;
  padding: 0;
}

.prose li {
  margin: 0.35rem 0;
}

.prose blockquote {
  margin: 1.25rem 0;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: var(--panel-strong);
}

.prose blockquote p {
  margin: 0;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.6rem 0;
}

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.25rem;
  max-width: 100%;
  min-width: 0;
}

.prose table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.prose th,
.prose td {
  padding: 0.75rem;
  border: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.prose th {
  background: var(--panel-strong);
}

.resource-list {
  display: grid;
  gap: 10px;
}

.resource-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel-strong);
  min-width: 0;
}

.resource-row > span {
  min-width: 0;
}

.resource-row small {
  display: block;
  color: var(--muted);
}

.resource-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 12px;
  flex-wrap: wrap;
}

.result-review {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.result-row {
  padding: 16px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 7px;
  background: var(--panel);
}

.result-row.incorrect {
  border-left-color: var(--danger);
}

.result-row h2 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.result-row p {
  margin: 0.5rem 0 0;
}

.document-frame {
  display: block;
  width: 100%;
  min-height: calc(100vh - 145px);
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel-strong);
}

video {
  width: 100%;
  max-height: calc(100vh - 180px);
  border-radius: 7px;
  background: #000000;
}

.video-placeholder {
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  background: repeating-linear-gradient(135deg, var(--panel), var(--panel) 12px, var(--panel-strong) 12px, var(--panel-strong) 24px);
}

.stats-grid div {
  padding: 18px;
  border-radius: 8px;
  background: var(--panel-strong);
}

.stats-grid strong {
  display: block;
  font-size: 2rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  max-width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.progress-user-list,
.progress-course-list,
.progress-lesson-list {
  display: grid;
  gap: 12px;
}

.progress-user-row,
.progress-lesson-row,
.progress-course-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.progress-user-row,
.progress-lesson-row {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--panel);
  text-decoration: none;
}

.progress-user-row:hover {
  background: var(--panel-strong);
}

.progress-course-heading h2,
.progress-course-heading p,
.progress-module h3 {
  margin: 0;
}

.progress-module {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.progress-lesson-row {
  background: var(--panel-strong);
}

.progress-lesson-row small {
  display: block;
  color: var(--muted);
}

.progress-attempts {
  margin-top: 18px;
}

.messages {
  width: min(1180px, calc(100% - 32px));
  margin: 16px auto 0;
}

.message {
  padding: 12px 14px;
  border-radius: 7px;
  background: var(--panel-strong);
}

.message.error { color: var(--danger); }

.score {
  font-size: 3rem;
  font-weight: 900;
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-footer {
  width: 100%;
  margin-top: auto;
  padding: 28px 20px 22px;
  flex-shrink: 0;
  background: #51305A;
  color: #F4E9FC;
  font-size: 18px;
  text-align: center;
}

.site-footer a { color: #9E7D71; }
.site-footer a:hover,
.site-footer a:focus-visible { color: #F4E9FC; }

@media (max-width: 1050px) {
  .site-header .nav { padding: 0 12px; }
  .site-header nav > ul { gap: 4px; }
  .site-header nav a,
  .site-header nav .nav-action,
  .site-header nav .theme-toggle { padding-inline: 10px; font-size: 1rem; }
}

@media (max-width: 900px) {
  .site-header .nav {
    padding: 0 10px;
    min-height: 76px;
    position: relative;
  }

  .logo-link { height: 70px; }
  .logo { height: 70px; max-width: 172px; }
  .brand-txt { max-width: 78px; height: 43px; }
  .brand-name { font-size: 0.855rem; }
  .brand-tagline { font-size: 0.6075rem; }

  .hamburger {
    display: flex;
    margin-left: auto;
    margin-right: 10px;
  }

  .site-header nav {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 6px);
    background: var(--accent);
    border: 1px solid var(--line);
    border-radius: 13px;
    box-shadow: 0 14px 30px var(--shadow);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    pointer-events: none;
    overflow-y: auto;
    transition: max-height 0.21s, opacity 0.21s;
    z-index: 101;
  }

  .site-header nav > ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 7px 0;
  }

  .site-header nav a,
  .site-header nav .nav-action,
  .site-header nav .theme-toggle {
    display: block;
    width: 100%;
    font-size: 1.1rem;
    text-align: left;
  }

  .site-header .nav-form,
  .site-header .theme-form { width: 100%; }

  #nav-toggle:checked ~ nav {
    max-height: min(88svh, 760px);
    opacity: 1;
    pointer-events: auto;
  }

  #nav-toggle:checked + label .line1 { transform: translateY(8px) rotate(45deg); }
  #nav-toggle:checked + label .line2 { opacity: 0; }
  #nav-toggle:checked + label .line3 { transform: translateY(-8px) rotate(-45deg); }

  .site-footer { padding: 22px 16px; }
}

@media (max-width: 780px) {
  .page-heading,
  .viewer-toolbar {
    flex-direction: column;
  }

  .page-heading,
  .viewer-toolbar {
    align-items: stretch;
  }

  .lesson-shell {
    display: block;
    width: calc(100% - 16px);
    max-width: 760px;
  }

  .lesson-sidebar {
    position: static;
    margin-bottom: 14px;
  }

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

  .resource-actions {
    width: 100%;
  }

  .progress-user-row,
  .progress-lesson-row,
  .progress-course-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .progress-user-row em,
  .progress-lesson-row em,
  .progress-course-heading strong {
    align-self: flex-start;
  }

  .document-frame {
    min-height: 72vh;
  }

  .landing-shell {
    padding: 48px 20px 64px;
  }

  .landing-intro h1 {
    font-size: 2.45rem;
  }

  .landing-purpose {
    margin-top: 52px;
  }
}

@media (max-width: 560px) {
  .prose .table-wrap {
    border: 0;
  }

  .prose table,
  .prose thead,
  .prose tbody,
  .prose tr,
  .prose th,
  .prose td {
    display: block;
    width: 100%;
    min-width: 0;
  }

  .prose thead {
    display: none;
  }

  .prose tr {
    border: 1px solid var(--line);
    border-radius: 7px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--panel);
  }

  .prose td {
    border-bottom: 1px solid var(--line);
  }

  .prose td:last-child {
    border-bottom: 0;
  }
}