/* kagamiX — quiet frame, one accent variable, tinted dark mode */
:root {
  --accent: #ff4081;
  --bg: light-dark(#ffffff, #0c0c0f);
  --surface: light-dark(#ffffff, #141418);
  --elevated: light-dark(#fafafa, #1b1b21);
  --ink: light-dark(#333333, #ededf0);
  --muted: light-dark(#6b7280, #9ca3af);
  --line: light-dark(#e7e7ea, #2a2a31);
  color-scheme: light dark;
}
[data-accent="nihongo"] { --bg: light-dark(#ffffff, #130410); }
[data-accent="vn"] { --accent: #e84a4a; --bg: light-dark(#ffffff, #130404); }

/* Manual theme override; no data-theme = follow system */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

* { box-sizing: border-box; margin: 0; }

body {
  font-family: "Noto Sans", "Noto Sans Thai Looped", "Noto Sans JP", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.6rem 1.25rem;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  white-space: nowrap;
}
.brand {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.brand span { color: var(--accent); }
.site-header nav { display: flex; gap: 0.25rem; }
.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}
.site-header nav a:hover { color: var(--ink); background: var(--elevated); }
.site-header nav a.active {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.theme-btn { margin-left: auto; }
.theme-btn.floating { position: fixed; top: 1rem; right: 1rem; }

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 1rem;
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}
.layout.sidebar-left { grid-template-columns: 320px 1fr; }
.sticky-col { position: sticky; top: 4.25rem; }
@media (max-width: 900px) {
  .layout, .layout.sidebar-left { grid-template-columns: 1fr; }
  .sticky-col { position: static; }
}
.stack > * + * { margin-top: 1rem; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
}
.card-head h2 { font-size: 1rem; font-weight: 800; letter-spacing: -0.02em; }
.card-body { padding: 1rem; }
.card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--line);
}

/* Forms */
.field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 0.25rem;
}
input[type="text"], select, textarea {
  width: 100%;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--elevated);
  color: var(--ink);
  font: inherit;
}
input[type="text"]:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  outline: none;
}
input:disabled, select:disabled { opacity: 0.45; }
textarea { resize: vertical; display: block; }
textarea.bare { border: 0; border-radius: 0; background: transparent; }
textarea.bare:focus { background: transparent; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
@media (max-width: 700px) { .grid-3 { grid-template-columns: 1fr; } }

.checks { border: 0; padding: 0; display: grid; gap: 0.2rem; }
.checks label, .check {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
}
.checks.cols-2 { grid-template-columns: 1fr 1fr; }
.checks.cols-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 700px) { .checks.cols-3 { grid-template-columns: 1fr 1fr; } }
.props-row { display: flex; gap: 0.75rem; align-items: flex-end; flex-wrap: wrap; }
.props-row .field { flex: 1; min-width: 110px; }
.props-row .check { padding-bottom: 0.6rem; white-space: nowrap; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--accent); }

/* Buttons */
.btn, .btn-outline, .btn-quiet, .btn-danger {
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
}
.btn { background: var(--accent); color: #fff; border: 1px solid var(--accent); text-align: center; }
.btn:hover { opacity: 0.85; }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-outline:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.btn-quiet { background: transparent; color: var(--muted); border: 1px solid var(--line); text-decoration: none; }
.btn-quiet:hover { color: var(--ink); background: var(--elevated); }
.btn-danger { background: transparent; color: #dc2626; border: 1px solid #dc2626; text-align: center; }
.btn-danger:hover { background: color-mix(in srgb, #dc2626 10%, transparent); }
button:disabled { opacity: 0.6; cursor: default; }

.snippet-list { display: grid; gap: 0.5rem; }

/* Preview */
#preview {
  font: inherit;
  white-space: pre-wrap;
  word-break: break-word;
  padding: 1rem;
  min-height: 300px;
}

/* Dropdown (native <details>) */
details.menu { position: relative; display: inline-block; }
details.menu summary {
  list-style: none;
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  cursor: pointer;
}
details.menu summary::-webkit-details-marker { display: none; }
details.menu summary::after { content: " ▾"; }
details.menu .menu-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  z-index: 20;
  min-width: 230px;
  display: flex;
  flex-direction: column;
  padding: 0.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.12);
}
.menu-list button {
  font: inherit;
  font-size: 0.875rem;
  text-align: left;
  padding: 0.4rem 0.6rem;
  border: 0;
  border-radius: 6px;
  background: none;
  color: var(--ink);
  cursor: pointer;
}
.menu-list button:hover { background: var(--elevated); }

.flow-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
}
.flow-row .sep { color: var(--muted); }

/* Home */
.home {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1rem;
  text-align: center;
}
.home h1 { font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }
.home .sub { color: var(--muted); margin-bottom: 2rem; }
.home-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; text-align: left; }
@media (max-width: 600px) { .home-grid { grid-template-columns: 1fr; } }
.home-grid .card-body { display: grid; gap: 0.5rem; }
.home-grid h2 { font-size: 1.1rem; font-weight: 800; letter-spacing: -0.02em; }
.home-grid .card.vn h2 { color: #e84a4a; }
.home-grid .card.nihongo h2 { color: #ff4081; }

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  padding: 1.5rem 1rem 2rem;
}