:root {
  --bg: #f4f1ea;
  --paper: #fffaf2;
  --ink: #1f2933;
  --muted: #5f6c7b;
  --accent: #0e7a6b;
  --accent-soft: #d8f2ed;
  --line: #d9d1c6;
  --shadow: 0 14px 30px rgba(22, 31, 40, 0.08);
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(circle at 85% 10%, #fff1d6 0%, transparent 38%),
    radial-gradient(circle at 10% 18%, #d8f2ed 0%, transparent 40%),
    var(--bg);
  color: var(--ink);
  font-family: "Source Sans 3", sans-serif;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 35;
  pointer-events: none;
  background: rgba(255, 250, 242, 0.42);
  border-bottom: 1px solid rgba(217, 209, 198, 0.5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.top-nav {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 40;
  display: flex;
  gap: 0.95rem;
}

.save-html-btn {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 45;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.save-html-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.top-nav-link {
  color: var(--ink);
  padding: 0.12rem 0;
  font-family: "Source Sans 3", sans-serif;
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid transparent;
}

.top-nav-link:hover,
.top-nav-link.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.home-page {
  min-height: 100vh;
  padding: 2rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

body:not(.home-page) {
  padding-top: 78px;
}

.home-main {
  width: min(980px, 94vw);
  margin: 0 auto;
}

.home-plain {
  padding: 0.4rem 0.2rem;
  text-align: center;
}

.home-plain h1 {
  font-size: clamp(3.4rem, 11vw, 8rem);
  line-height: 0.95;
  margin-bottom: 0.7rem;
}

.home-actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
}

.home-action {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  padding: 0.45rem 0.95rem;
}

.home-action:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.vocab-page {
  min-height: 100vh;
  padding: 2rem 1rem;
}

.vocab-main {
  width: min(980px, 94vw);
  margin: 0 auto;
}

.vocab-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.vocab-card h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.vocab-note {
  color: var(--muted);
  margin: 0 0 0.8rem;
}

.vocab-editor {
  width: 100%;
  height: 100%;
  resize: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  line-height: 1.6;
  padding: 0.8rem;
}

.vocab-editor:focus {
  outline: 2px solid #8dc9bf;
  border-color: #8dc9bf;
}

.vocab-status {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.hero {
  padding: 4rem 1.25rem 2rem;
  text-align: center;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: "Playfair Display", serif;
  letter-spacing: 0.01em;
}

h1 {
  margin: 0.35rem 0;
  font-size: clamp(2rem, 5vw, 3.3rem);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.annotation-tools {
  margin-top: 0.25rem;
  display: grid;
  gap: 0.45rem;
}

.annotation-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.42rem 0.9rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.annotation-btn:hover {
  border-color: #9d7700;
  background: #fff7cf;
  color: #684d00;
}

.layout {
  width: min(1160px, 92vw);
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: 270px 1fr;
  gap: 1.4rem;
  align-items: start;
}

.left-stack {
  position: sticky;
  top: 86px;
  display: grid;
  gap: 0.9rem;
}

.toc {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.dict-box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.dict-box h3 {
  margin: 0;
  font-size: 1.05rem;
}

.toc h2 {
  margin: 0 0 0.8rem;
  font-size: 1.25rem;
}

.toc nav {
  display: grid;
  gap: 0.5rem;
}

.toc a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  border-left: 3px solid transparent;
  padding-left: 0.5rem;
}

.toc a:hover {
  border-left-color: var(--accent);
  color: var(--accent);
}

.version-box {
  margin-top: 1rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: grid;
  gap: 0.45rem;
}

.version-box h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
}

.version-btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  padding: 0.4rem 0.6rem;
  text-align: left;
  cursor: pointer;
}

.version-btn:hover,
.version-btn.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.content {
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.25rem 1.2rem;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-top: 0;
  margin-bottom: 0.9rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.panel h3 {
  margin-top: 1.1rem;
  margin-bottom: 0.5rem;
  font-size: 1.16rem;
}

.projet-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1rem;
  align-items: start;
}

.teacher-comment {
  position: sticky;
  top: 92px;
  border: 1px solid #e9a3a3;
  background: #fff1f1;
  border-radius: 12px;
  padding: 0.8rem;
  box-shadow: 0 8px 18px rgba(110, 12, 12, 0.12);
}

.teacher-comment h3 {
  margin-top: 0;
  color: #8d0f0f;
}

.teacher-comment p {
  margin: 0.45rem 0;
  color: #8d0f0f;
}

.category-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.8rem;
}

.category-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.42rem 0.95rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.category-btn:hover,
.category-btn.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.artifact-grid {
  display: grid;
  gap: 0.8rem;
}

.artifact {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 0.85rem;
}

.artifact.is-new-in-version {
  border-color: #0e7a6b;
  box-shadow: 0 0 0 3px rgba(14, 122, 107, 0.16);
  background: #f4fffc;
}

.versioned.is-new-in-version {
  background: #f4fffc;
  box-shadow: inset 0 0 0 2px rgba(14, 122, 107, 0.16);
}

.background-block {
  border-radius: 10px;
  padding: 0.05rem 0.45rem 0.4rem;
}

.artifact h3 {
  margin-top: 0;
}

.thumbnail-link {
  display: inline-block;
  margin: 0.35rem 0 0.2rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.youtube-thumbnail {
  display: block;
  width: min(100%, 420px);
  height: auto;
}

.thumbnail-link:hover {
  box-shadow: 0 8px 18px rgba(22, 31, 40, 0.15);
}

a {
  color: #004d45;
  word-break: break-word;
}

ul {
  margin-top: 0;
  padding-left: 1.15rem;
}

.editable {
  transition: background-color 0.15s ease, outline-color 0.15s ease;
  border-radius: 6px;
}

.editable:hover {
  background: #f7f4ed;
  cursor: text;
}

.editable.is-editing {
  background: #ffffff;
  outline: 2px solid #8dc9bf;
}

.dict-highlight {
  background: #fff19e;
  border-radius: 3px;
  padding: 0 0.08em;
}

.hidden {
  display: none;
}

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

  .left-stack {
    position: relative;
    top: 0;
  }

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

  .teacher-comment {
    position: relative;
    top: 0;
  }
}