/* Snowlog: tema oscuro por defecto (obsidiana nevada), claro si el sistema lo pide. */
:root {
  --bg-primary: #1c1d20;
  --bg-secondary: #16171a;
  --bg-ribbon: #121316;
  --bg-elevated: #24262a;
  --border: #2c2e33;
  --text-normal: #e2e4e7;
  --text-muted: #a3a9b1;
  --text-faint: #7b828b;
  --accent: #8ec5e8;
  --accent-text: #0e1114;
  --hover: rgba(255, 255, 255, 0.06);
  --active: rgba(142, 197, 232, 0.16);
  --danger: #f08c7a;
  --code-bg: #26282d;
  --mark-bg: rgba(240, 200, 90, 0.28);
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --left-w: 260px;
  --right-w: 240px;
  --line-w: 720px;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f7f9;
    --bg-ribbon: #eef0f3;
    --bg-elevated: #ffffff;
    --border: #e1e4e8;
    --text-normal: #1f2328;
    --text-muted: #57606a;
    --text-faint: #6e7781;
    --accent: #1f6fa8;
    --accent-text: #ffffff;
    --hover: rgba(0, 0, 0, 0.05);
    --active: rgba(31, 111, 168, 0.12);
    --danger: #b42318;
    --code-bg: #f1f3f5;
    --mark-bg: rgba(255, 210, 60, 0.45);
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-normal);
  font-family: var(--font-ui);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.icon { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ---------- Layout ---------- */
.app {
  height: 100dvh;
  display: grid;
  grid-template-columns: 44px var(--left-w) minmax(0, 1fr) var(--right-w);
  overflow: hidden;
}
.app.left-closed { grid-template-columns: 44px 0 minmax(0, 1fr) var(--right-w); }
.app.right-closed { grid-template-columns: 44px var(--left-w) minmax(0, 1fr) 0; }
.app.left-closed.right-closed { grid-template-columns: 44px 0 minmax(0, 1fr) 0; }
.app.left-closed .sidebar-left, .app.right-closed .sidebar-right { visibility: hidden; }

.ribbon {
  background: var(--bg-ribbon);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 0;
}
.ribbon-spacer { flex: 1; }
.ribbon-btn, .icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  border-radius: 6px;
}
.ribbon-btn { width: 32px; height: 32px; }
.icon-btn { width: 28px; height: 28px; }
.ribbon-btn:hover, .icon-btn:hover { background: var(--hover); color: var(--text-normal); }
.icon-btn.on { color: var(--accent); }

.sidebar {
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}
.sidebar-left { border-right: 1px solid var(--border); }
.sidebar-right { border-left: 1px solid var(--border); }
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 40px;
  padding: 0 8px 0 14px;
  flex: none;
}
.sidebar-title {
  flex: 1;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.sidebar-actions { display: flex; gap: 2px; }

/* ---------- Árbol de archivos ---------- */
.tree { flex: 1; overflow: auto; padding: 2px 6px 24px; outline: none; }
.tree.drop-root { background: var(--active); }
.tree-row {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  min-height: 28px;
  padding: 3px 4px 3px calc(8px + var(--depth, 0) * 16px);
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  text-align: left;
  font-size: 14px;
  position: relative;
}
.tree-row:hover { background: var(--hover); color: var(--text-normal); }
.tree-row.active { background: var(--active); color: var(--text-normal); }
.tree-row.drop { outline: 2px dashed var(--accent); outline-offset: -2px; }
.tree-row .label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-row.is-folder { color: var(--text-normal); font-weight: 500; }
.tree-row .chev { width: 14px; height: 14px; transition: transform 0.12s; color: var(--text-faint); }
.tree-row.open .chev { transform: rotate(90deg); }
.tree-row .spacer { width: 14px; flex: none; }
.tree-row .row-more { opacity: 0; width: 24px; height: 24px; }
.tree-row:hover .row-more, .tree-row:focus-within .row-more, .tree-row.active .row-more { opacity: 1; }
.tree-children { position: relative; }
.tree-empty { padding: 12px 14px; color: var(--text-faint); font-size: 13px; }

/* ---------- Vista principal ---------- */
.workspace { position: relative; display: flex; flex-direction: column; min-width: 0; background: var(--bg-primary); }
.view-header {
  height: 40px;
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px 0 14px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; color: var(--text-muted); text-align: center; }
.breadcrumb .crumb-sep { margin: 0 6px; color: var(--text-faint); }
.breadcrumb .crumb-last { color: var(--text-normal); }
.view-actions { display: flex; gap: 2px; }
.mobile-only { display: none; }

.view-content { flex: 1; overflow: auto; }
.note { max-width: var(--line-w); margin: 0 auto; padding: 32px 32px 120px; }
.inline-title {
  width: 100%;
  border: 0;
  background: transparent;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  padding: 0;
  margin: 0 0 16px;
  outline: none;
}
.editor {
  display: block;
  width: 100%;
  min-height: 60vh;
  border: 0;
  outline: none;
  resize: none;
  background: transparent;
  font-size: 16px;
  line-height: 1.65;
  padding: 0;
  overflow: hidden;
  tab-size: 4;
}
.empty {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
}
.empty-title { font-size: 18px; margin: 0 0 8px; color: var(--text-normal); }
.link-btn { border: 0; background: none; color: var(--accent); font-size: 15px; padding: 6px; border-radius: 6px; }
.link-btn:hover { background: var(--hover); }

.status-bar {
  position: absolute;
  right: 0;
  bottom: 0;
  display: flex;
  gap: 14px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
  border-top-left-radius: 8px;
}
.status-bar .error { color: var(--danger); }

/* ---------- Lectura (Markdown) ---------- */
.markdown { font-size: 16px; line-height: 1.65; overflow-wrap: anywhere; }
.markdown > :first-child { margin-top: 0; }
.markdown h1, .markdown h2, .markdown h3, .markdown h4, .markdown h5, .markdown h6 { line-height: 1.3; margin: 1.4em 0 0.5em; }
.markdown h1 { font-size: 1.75em; }
.markdown h2 { font-size: 1.45em; }
.markdown h3 { font-size: 1.2em; }
.markdown p { margin: 0.6em 0; }
.markdown a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.markdown a.internal-link { text-decoration-style: dotted; }
.markdown code { font-family: var(--font-mono); font-size: 0.9em; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
.markdown pre { background: var(--code-bg); padding: 12px 14px; border-radius: 8px; overflow: auto; }
.markdown pre code { background: none; padding: 0; }
.markdown blockquote { margin: 0.8em 0; padding: 2px 16px; border-left: 3px solid var(--accent); color: var(--text-muted); }
.markdown ul, .markdown ol { padding-left: 1.5em; margin: 0.5em 0; }
.markdown li.task { list-style: none; margin-left: -1.3em; }
.markdown li.task input { margin: 0 8px 0 0; vertical-align: -1px; }
.markdown li.task.done > .task-text { color: var(--text-muted); text-decoration: line-through; }
.markdown mark { background: var(--mark-bg); color: inherit; padding: 0 2px; border-radius: 3px; }
/* Etiquetas */
.markdown .tag {
  display: inline-block;
  padding: 0 0.5em;
  border-radius: 999px;
  background: var(--active);
  color: var(--accent);
  font-size: 0.88em;
  line-height: 1.6;
  white-space: nowrap;
}

/* Propiedades (frontmatter) */
.markdown .properties {
  margin: 0 0 1.4em;
  padding: 0 0 0.8em;
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: 4px;
  font-size: 14px;
}
.markdown .property { display: grid; grid-template-columns: minmax(90px, 160px) minmax(0, 1fr); gap: 12px; align-items: baseline; margin: 0; }
.markdown .property dt { color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.markdown .property dd { margin: 0; display: flex; flex-wrap: wrap; gap: 4px; align-items: baseline; min-width: 0; }
.markdown .pill { padding: 0 0.5em; border-radius: 6px; background: var(--code-bg); }
.markdown .empty-value { color: var(--text-faint); font-style: italic; }

/* Tablas */
.markdown .table-wrap { overflow-x: auto; margin: 0.9em 0; }
.markdown table { border-collapse: collapse; font-size: 0.94em; min-width: 50%; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; vertical-align: top; }
.markdown th { background: var(--bg-secondary); font-weight: 600; }
.markdown tbody tr:nth-child(even) td { background: var(--hover); }
.markdown .align-center { text-align: center; }
.markdown .align-right { text-align: right; }

/* Callouts */
.markdown .callout {
  --callout: 120, 130, 140;
  margin: 1em 0;
  padding: 10px 14px;
  border-radius: 8px;
  border-left: 3px solid rgb(var(--callout));
  background: rgba(var(--callout), 0.1);
}
.markdown .callout-title { display: flex; align-items: center; gap: 8px; font-weight: 600; color: rgb(var(--callout)); }
.markdown summary.callout-title { cursor: pointer; list-style: none; }
.markdown summary.callout-title::-webkit-details-marker { display: none; }
.markdown summary.callout-title::after { content: "›"; margin-left: auto; transition: transform 0.12s; }
.markdown details.callout[open] > summary.callout-title::after { transform: rotate(90deg); }
.markdown .callout-icon::before { display: inline-block; width: 1.1em; text-align: center; }
.markdown .callout-content { margin-top: 6px; }
.markdown .callout-content > :first-child { margin-top: 0; }
.markdown .callout-content > :last-child { margin-bottom: 0; }
.markdown .callout[data-callout="note"] { --callout: 100, 150, 220; }
.markdown .callout[data-callout="note"] .callout-icon::before { content: "✎"; }
.markdown .callout[data-callout="abstract"] { --callout: 40, 180, 190; }
.markdown .callout[data-callout="abstract"] .callout-icon::before { content: "≡"; }
.markdown .callout[data-callout="info"] { --callout: 90, 160, 235; }
.markdown .callout[data-callout="info"] .callout-icon::before { content: "i"; font-weight: 700; }
.markdown .callout[data-callout="tip"] { --callout: 30, 190, 170; }
.markdown .callout[data-callout="tip"] .callout-icon::before { content: "✦"; }
.markdown .callout[data-callout="success"] { --callout: 70, 190, 110; }
.markdown .callout[data-callout="success"] .callout-icon::before { content: "✓"; }
.markdown .callout[data-callout="question"] { --callout: 230, 170, 60; }
.markdown .callout[data-callout="question"] .callout-icon::before { content: "?"; font-weight: 700; }
.markdown .callout[data-callout="warning"] { --callout: 235, 150, 60; }
.markdown .callout[data-callout="warning"] .callout-icon::before { content: "!"; font-weight: 700; }
.markdown .callout[data-callout="danger"] { --callout: 235, 90, 90; }
.markdown .callout[data-callout="danger"] .callout-icon::before { content: "✕"; }
.markdown .callout[data-callout="example"] { --callout: 160, 120, 230; }
.markdown .callout[data-callout="example"] .callout-icon::before { content: "▸"; }
.markdown .callout[data-callout="quote"] { --callout: 150, 155, 165; }
.markdown .callout[data-callout="quote"] .callout-icon::before { content: "”"; font-weight: 700; }
@media (prefers-color-scheme: light) {
  .markdown .callout { background: rgba(var(--callout), 0.09); }
  .markdown .callout-title { filter: brightness(0.72); }
}

.markdown hr { border: 0; border-top: 1px solid var(--border); margin: 1.5em 0; }

/* ---------- Esquema ---------- */
.outline { flex: 1; overflow: auto; padding: 4px 8px 24px; }
.outline-item {
  display: block;
  width: 100%;
  border: 0;
  background: none;
  text-align: left;
  color: var(--text-muted);
  font-size: 13px;
  padding: 4px 8px 4px calc(8px + var(--level, 0) * 12px);
  border-radius: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.outline-item:hover { background: var(--hover); color: var(--text-normal); }
.outline-empty { padding: 8px 14px; color: var(--text-faint); font-size: 13px; }

/* ---------- Menú contextual, modales, avisos ---------- */
.menu {
  position: fixed;
  z-index: 40;
  min-width: 190px;
  padding: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}
.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 10px;
  border: 0;
  border-radius: 6px;
  background: none;
  text-align: left;
  font-size: 14px;
}
.menu-item:hover, .menu-item:focus { background: var(--hover); outline: none; }
.menu-item.danger { color: var(--danger); }
.menu-sep { height: 1px; background: var(--border); margin: 4px 2px; }

.modal-root:empty { display: none; }
.modal-root {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 16px 16px;
}
.modal {
  width: min(520px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 18px;
}
.modal h2 { margin: 0 0 12px; font-size: 17px; }
.modal p { margin: 0 0 12px; color: var(--text-muted); font-size: 14px; line-height: 1.5; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
.field label { font-size: 13px; color: var(--text-muted); }
.input {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg-primary);
  outline: none;
}
.input:focus { border-color: var(--accent); }
.btn {
  padding: 8px 14px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  font-weight: 500;
  min-height: 38px;
}
.btn:hover { background: var(--hover); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn:disabled { opacity: 0.55; cursor: default; }

.switcher { padding: 0; overflow: hidden; }
.switcher .input { border: 0; border-bottom: 1px solid var(--border); border-radius: 0; padding: 14px 16px; font-size: 16px; background: transparent; }
.switcher-list { max-height: 50vh; overflow: auto; padding: 6px; }
.switcher-item { display: flex; flex-direction: column; width: 100%; border: 0; background: none; text-align: left; padding: 8px 10px; border-radius: 6px; }
.switcher-item.sel { background: var(--active); }
.switcher-item .sub { font-size: 12px; color: var(--text-muted); }
.switcher-hint { padding: 8px 16px; font-size: 12px; color: var(--text-muted); border-top: 1px solid var(--border); }

.notices { position: fixed; top: 12px; right: 12px; z-index: 60; display: flex; flex-direction: column; gap: 8px; }
.notice {
  max-width: 340px;
  padding: 10px 14px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  font-size: 14px;
}
.notice.error { border-color: var(--danger); }

/* ---------- Pantallas de acceso ---------- */
.lock {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--bg-secondary);
}
.lock-card {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 28px;
}
.lock-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.lock-logo img { width: 40px; height: 40px; }
.lock-logo span { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.lock-card h1 { font-size: 18px; margin: 0 0 8px; }
.lock-card p { color: var(--text-muted); font-size: 14px; line-height: 1.5; margin: 0 0 16px; }
.lock-card .btn { width: 100%; margin-top: 4px; }
.lock-card .error-text { color: var(--danger); font-size: 14px; margin: 8px 0 0; }
.lock-links { display: flex; flex-direction: column; align-items: center; gap: 2px; margin-top: 14px; }
.lock-links .link-btn { font-size: 14px; }
.recovery-code {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: 0.04em;
  text-align: center;
  padding: 14px;
  border-radius: 8px;
  background: var(--code-bg);
  margin: 0 0 12px;
  user-select: all;
  overflow-wrap: anywhere;
}
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; margin: 12px 0; }
.check input { margin-top: 3px; }

/* ---------- Móvil ---------- */
.backdrop { display: none; }
@media (max-width: 760px) {
  .app, .app.left-closed, .app.right-closed, .app.left-closed.right-closed { grid-template-columns: minmax(0, 1fr); }
  .ribbon { display: none; }
  .mobile-only { display: inline-flex; }
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 30;
    width: min(320px, 86vw);
    visibility: visible !important;
    transition: transform 0.18s ease;
  }
  .app.mobile-left .sidebar-left, .app.mobile-right .sidebar-right { box-shadow: var(--shadow); }
  .sidebar-left { left: 0; transform: translateX(-102%); }
  .sidebar-right { right: 0; transform: translateX(102%); }
  .app.mobile-left .sidebar-left { transform: none; }
  .app.mobile-right .sidebar-right { transform: none; }
  .backdrop { display: block; position: fixed; inset: 0; z-index: 25; background: rgba(0, 0, 0, 0.45); }
  .note { padding: 20px 16px 96px; }
  .inline-title { font-size: 25px; }
  .tree-row { min-height: 40px; font-size: 15px; }
  .tree-row .row-more { opacity: 1; }
  .icon-btn { width: 40px; height: 40px; }
}

.lock-card .hint { font-size: 13px; margin: 10px 0 0; }