:root {
  color-scheme: dark;
  --bg: #12100d;
  --panel: #1f1a16;
  --panel-2: #2b241f;
  --text: #fff6e5;
  --muted: #cbbda6;
  --line: rgba(255, 246, 229, 0.14);
  --accent: #f0b35a;
  --accent-2: #f56d5f;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  overflow-x: hidden;
}

button,
select,
input,
textarea {
  font: inherit;
}

button,
.button {
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: #21160b;
  cursor: pointer;
  font-weight: 800;
  padding: 0.78rem 1rem;
  text-decoration: none;
}

button.secondary,
.button.secondary {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
}

button.danger {
  background: #57312d;
  color: #ffd9d5;
  border: 1px solid rgba(245, 109, 95, 0.35);
}

button:disabled {
  cursor: not-allowed;
  filter: grayscale(0.7);
  opacity: 0.55;
}

.hidden {
  display: none !important;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #16120f;
  color: var(--text);
  padding: 0.75rem 0.85rem;
}

textarea {
  min-height: 7rem;
  resize: vertical;
  line-height: 1.45;
}

label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 1rem;
  padding: 1rem;
  overflow: hidden;
}

.board-stage,
.side-panel,
.editor-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

.board-stage {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 0.75rem;
  padding: 1rem;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.top-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.small-button {
  padding: 0.62rem 0.85rem;
  border-radius: 12px;
  font-size: 0.92rem;
}

.brand {
  display: grid;
  gap: 0.2rem;
}

.brand h1,
.brand h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.5vw, 2rem);
}

.brand span,
.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

.board-wrap {
  min-height: 0;
  display: grid;
  place-items: center;
}

#board,
#previewBoard {
  width: 100%;
  max-width: min(100%, 64vh);
  max-height: min(100%, 64vh);
  aspect-ratio: 1;
  border-radius: 24px;
}

.coord {
  fill: rgba(61, 38, 20, 0.72);
  font-size: 19px;
  font-weight: 800;
}

.stone-label {
  font-size: 23px;
  font-weight: 900;
  pointer-events: none;
  user-select: none;
}

.stone-label.light {
  fill: #fff6e5;
}

.stone-label.dark {
  fill: #21160b;
}

.candidate-move {
  cursor: pointer;
}

.candidate-label {
  fill: #06210f;
  font-size: 21px;
  font-weight: 950;
  pointer-events: none;
  user-select: none;
}

.side-panel {
  padding: 1rem;
  display: grid;
  gap: 1rem;
  align-content: start;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.portrait-study .board-stage {
  grid-template-rows: auto minmax(0, 1fr);
}

.portrait-study .top-bar {
  min-height: 0;
}

.portrait-study .brand h1 {
  font-size: clamp(1.35rem, 7vw, 2.4rem);
}

.portrait-study .brand span {
  font-size: clamp(0.85rem, 3.4vw, 1.1rem);
}

.compact-panel {
  align-content: start;
  max-height: 36vh;
}

.compact-panel .step-row {
  font-size: clamp(1rem, 2.6vw, 1.45rem);
}

.move-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.move-nav button {
  min-height: 2.8rem;
}

.comment-card {
  min-height: 8rem;
}

.menu-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.menu-card {
  width: min(100%, 46rem);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  padding: clamp(1.25rem, 5vw, 2rem);
  display: grid;
  gap: 1.25rem;
}

.menu-actions {
  display: grid;
  gap: 0.85rem;
}

.menu-actions button {
  min-height: 4.5rem;
  font-size: clamp(1.1rem, 4.8vw, 1.65rem);
}

.list-card {
  align-self: stretch;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.joseki-list {
  display: grid;
  gap: 0.65rem;
}

.joseki-list button {
  display: grid;
  gap: 0.25rem;
  text-align: left;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
}

.joseki-list strong {
  font-size: clamp(1.15rem, 4.6vw, 1.6rem);
}

.joseki-list span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

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

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
}

.step-row {
  display: grid;
  gap: 0.55rem;
}

.step-row input[type="range"] {
  padding: 0;
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.16);
  padding: 0.9rem;
}

.card h3 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
}

.comment {
  white-space: pre-wrap;
  line-height: 1.55;
}

@media (max-width: 520px) {
  .move-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .app-shell.study {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
    grid-template-rows: minmax(0, 1fr);
    align-items: stretch;
  }

  .study .board-stage,
  .study .side-panel {
    min-height: 0;
  }

  .study .compact-panel {
    max-height: calc(100vh - 2rem);
  }

  .study #board {
    max-width: min(100%, calc(100vh - 7rem));
    max-height: min(100%, calc(100vh - 7rem));
  }

  .portrait-study .brand h1 {
    font-size: clamp(1.5rem, 3vw, 2.4rem);
  }

  .portrait-study .brand span {
    font-size: 1rem;
  }

  .comment-card {
    min-height: 16rem;
  }
}

.complete-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(18, 16, 13, 0.78);
  backdrop-filter: blur(10px);
}

.complete-card {
  width: min(100%, 24rem);
  border: 1px solid rgba(240, 179, 90, 0.35);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 0%, rgba(41, 214, 112, 0.18), transparent 45%),
    linear-gradient(180deg, #2b241f, #17120f);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.58);
  padding: 2rem 1.4rem 1.4rem;
  text-align: center;
}

.complete-badge {
  width: 4.5rem;
  height: 4.5rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #29d670;
  color: #082a15;
  font-size: 2.6rem;
  font-weight: 950;
  box-shadow: 0 0 0 8px rgba(41, 214, 112, 0.12);
}

.complete-card h2 {
  margin: 0;
  font-size: clamp(1.8rem, 8vw, 2.45rem);
}

.complete-card p {
  margin: 0.65rem 0 1.35rem;
  color: var(--muted);
  line-height: 1.5;
}

.complete-card button {
  width: 100%;
  min-height: 3.4rem;
  font-size: 1.1rem;
}

.notice {
  color: #ffe1a6;
  border-color: rgba(240, 179, 90, 0.28);
  background: rgba(240, 179, 90, 0.08);
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.portrait-warning {
  display: none;
  min-height: 100vh;
  place-items: center;
  padding: 2rem;
  text-align: center;
  background: #12100d;
}

.portrait-warning strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.3rem;
}

.editor-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(280px, 0.35fr) minmax(460px, 0.65fr);
  gap: 1rem;
  padding: 1rem;
}

.editor-panel {
  padding: 1rem;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.entry-list {
  display: grid;
  gap: 0.55rem;
  margin-top: 1rem;
}

.entry-item {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 14px;
  padding: 0.8rem;
}

.entry-item.active {
  border-color: var(--accent);
  background: rgba(240, 179, 90, 0.12);
}

.editor-main {
  display: grid;
  grid-template-columns: minmax(360px, 0.55fr) minmax(320px, 0.45fr);
  gap: 1rem;
}

.move-comments {
  display: grid;
  gap: 0.6rem;
}

.move-comment {
  display: grid;
  grid-template-columns: 6rem 1fr;
  gap: 0.6rem;
  align-items: start;
}

.move-comment textarea {
  min-height: 4.2rem;
}

.small {
  font-size: 0.85rem;
}

details summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 800;
}

pre {
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--muted);
}

@media (max-width: 980px) {
  .editor-shell,
  .editor-main {
    grid-template-columns: 1fr;
  }

  .editor-panel {
    max-height: none;
  }

  #previewBoard {
    width: min(100%, 88vw);
    max-height: none;
  }
}