:root {
  color-scheme: light;
  --bg: #f6f4ef;
  --paper: #fffdf7;
  --paper-strong: #ffffff;
  --ink: #1d2433;
  --ink-soft: #4b5565;
  --ink-muted: #7b8494;
  --line: #d9d2c4;
  --line-strong: #b9ae9b;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --blue: #2563eb;
  --yellow: #f2b705;
  --red: #dc2626;
  --green: #16a34a;
  --shadow: 0 18px 50px rgba(42, 34, 19, 0.12);
  --radius: 8px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }

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

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

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  padding: 0.7rem clamp(1rem, 3vw, 2rem);
  background: rgba(255, 253, 247, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  user-select: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: #1d2433;
  color: #fffdf7;
  box-shadow: 0 10px 24px rgba(29, 36, 51, 0.22);
  flex: 0 0 auto;
}

.brand-mark svg { width: 22px; height: 22px; }

.brand-text { display: grid; line-height: 1.15; }
.brand-name { font-weight: 800; }
.brand-sub { color: var(--ink-muted); font-size: 0.82rem; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 650;
  font-size: 0.92rem;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius);
}

.site-nav a:hover { color: var(--ink); background: #f0ece2; }

/* ---------- Buttons ---------- */
.text-btn, .primary-btn, .outline-btn, .danger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 36px;
  border-radius: 7px;
  border: 1px solid transparent;
  padding: 0.5rem 0.78rem;
  font-weight: 750;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.text-btn { color: var(--ink-soft); background: transparent; }
.text-btn:hover { color: var(--ink); background: #f1ede3; }

.primary-btn {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.22);
}
.primary-btn:hover { background: var(--accent-strong); }
.primary-btn:disabled { opacity: 0.6; cursor: default; box-shadow: none; }

.outline-btn { color: var(--ink); background: #fffdf7; border-color: var(--line-strong); }
.outline-btn:hover { background: #f5efe4; }

.danger-btn { color: #fff; background: var(--red); border-color: var(--red); }
.danger-btn:hover { background: #b91c1c; }

.btn-sm { min-height: 32px; padding: 0.38rem 0.6rem; font-size: 0.86rem; }

/* ---------- Workspace ---------- */
.workspace {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 64px);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  padding: 0.7rem clamp(0.75rem, 2vw, 1.25rem);
  background: #eee7db;
  border-bottom: 1px solid var(--line);
}

.toolbar .spacer { flex: 1 1 auto; }

.view-toggle {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  overflow: hidden;
  background: #fffdf7;
}

.view-toggle button {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
}
.view-toggle button + button { border-left: 1px solid var(--line-strong); }
.view-toggle button.active { background: var(--ink); color: #fff; }

.tool-select {
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: #fffdf7;
  color: var(--ink);
  padding: 0 0.5rem;
  font-weight: 650;
  cursor: pointer;
}

.premium-action.premium-lock::after {
  content: "PRO";
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--yellow);
  color: #4a3a00;
  border-radius: 999px;
  padding: 0.05rem 0.35rem;
  margin-left: 0.1rem;
}

/* ---------- Editor body ---------- */
.editor-body {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  min-height: 0;
}

.docs-panel {
  border-right: 1px solid var(--line);
  background: #fbf7ef;
  padding: 0.85rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.docs-panel h2 {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.docs-list { display: grid; gap: 0.3rem; }

.doc-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper-strong);
  padding: 0.45rem 0.55rem;
  cursor: pointer;
  font-size: 0.88rem;
}
.doc-item:hover { border-color: var(--accent); }
.doc-item.active { border-color: var(--accent); background: #eef0ff; }
.doc-item .doc-title { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 650; }
.doc-item .doc-del {
  border: none;
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0 0.15rem;
}
.doc-item .doc-del:hover { color: var(--red); }

.docs-note { color: var(--ink-muted); font-size: 0.78rem; line-height: 1.5; margin: 0; }

.editor-shell {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  min-height: 0;
}
.editor-shell.mode-edit,
.editor-shell.mode-preview { grid-template-columns: 1fr; }
.editor-shell.mode-edit .preview-pane,
.editor-shell.mode-preview .editor-pane { display: none; }

.pane { display: flex; flex-direction: column; min-width: 0; background: var(--paper-strong); position: relative; }

.format-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem;
  padding: 0.4rem;
  border-bottom: 1px solid var(--line);
  background: #f4f0e7;
}

.format-bar button {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  min-width: 32px;
  height: 30px;
  padding: 0 0.45rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
}
.format-bar button:hover { background: #e4ddcf; color: var(--accent); }

#mdInput {
  flex: 1 1 auto;
  width: 100%;
  resize: none;
  border: none;
  padding: 1rem 1.1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper-strong);
  outline: none;
  tab-size: 4;
}

.preview-pane .preview-head,
.editor-pane .pane-head {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 0.55rem 1.1rem 0;
}

.markdown-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 1rem 1.4rem 2rem;
}

.statusbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.5rem clamp(0.75rem, 2vw, 1.25rem);
  border-top: 1px solid var(--line);
  background: #eee7db;
  color: var(--ink-muted);
  font-size: 0.82rem;
}

.statusbar .spacer { flex: 1 1 auto; }

.pro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  color: #14532d;
  background: #dcfce7;
  font-size: 0.76rem;
  font-weight: 800;
}

/* ---------- Fullscreen ---------- */
.workspace.fullscreen {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: var(--bg);
  /* Bounded height so the panes scroll internally instead of overflowing the
     fixed, non-scrollable viewport. dvh keeps it correct on mobile chrome. */
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}
body.editor-locked { overflow: hidden; }
.workspace.fullscreen .docs-panel { display: none; }
/* Make the whole scroll chain bound to the viewport so #mdInput and the preview
   can scroll their own overflow (min-height:0 + 1fr rows are required for nested
   fl/grid scrolling to work). */
.workspace.fullscreen .editor-body {
  grid-template-columns: 1fr;
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
}
.workspace.fullscreen .editor-shell {
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
}
.workspace.fullscreen .pane { min-height: 0; }
.workspace.fullscreen #mdInput { min-height: 0; overflow-y: auto; }
.workspace.fullscreen .markdown-body { min-height: 0; }

/* ---------- Drag/drop hint ---------- */
.drop-hint {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(79, 70, 229, 0.08);
  border: 2px dashed var(--accent);
  color: var(--accent);
  font-weight: 800;
  pointer-events: none;
  z-index: 5;
}
.editor-pane.dragover .drop-hint { display: flex; }

/* ---------- Rendered markdown + themes ---------- */
.markdown-body { line-height: 1.7; color: var(--ink); word-wrap: break-word; }
.markdown-body > *:first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  margin: 1.4em 0 0.6em; line-height: 1.3; font-weight: 700;
}
.markdown-body h1 { font-size: 1.9rem; border-bottom: 1px solid var(--line); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5rem; border-bottom: 1px solid var(--line); padding-bottom: 0.3em; }
.markdown-body h3 { font-size: 1.25rem; }
.markdown-body h4 { font-size: 1.05rem; }
.markdown-body p { margin: 0.8em 0; }
.markdown-body a { color: var(--accent); }
.markdown-body code {
  background: rgba(125, 132, 148, 0.14);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}
.markdown-body pre {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}
.markdown-body pre code { background: transparent; padding: 0; color: inherit; }
.markdown-body blockquote {
  margin: 0.9em 0;
  padding: 0.4em 1em;
  border-left: 4px solid var(--accent);
  background: rgba(125, 132, 148, 0.08);
  color: var(--ink-soft);
}
.markdown-body ul, .markdown-body ol { padding-left: 1.6em; margin: 0.8em 0; }
.markdown-body li { margin: 0.3em 0; }
.markdown-body table { border-collapse: collapse; width: 100%; margin: 1em 0; display: block; overflow-x: auto; }
.markdown-body th, .markdown-body td { border: 1px solid var(--line); padding: 0.5em 0.75em; text-align: left; }
.markdown-body th { background: rgba(125, 132, 148, 0.1); }
.markdown-body img { max-width: 100%; border-radius: 8px; }
.markdown-body hr { border: none; border-top: 1px solid var(--line); margin: 1.5em 0; }
.markdown-body input[type="checkbox"] { margin-right: 0.4em; }

/* Theme: dark */
.markdown-body.theme-dark { background: #0f172a; color: #e2e8f0; }
.markdown-body.theme-dark h1, .markdown-body.theme-dark h2 { border-color: #334155; }
.markdown-body.theme-dark a { color: #818cf8; }
.markdown-body.theme-dark blockquote { background: rgba(148, 163, 184, 0.12); color: #cbd5e1; border-left-color: #818cf8; }
.markdown-body.theme-dark th, .markdown-body.theme-dark td { border-color: #334155; }
.markdown-body.theme-dark th { background: rgba(148, 163, 184, 0.14); }
.markdown-body.theme-dark hr { border-color: #334155; }
.markdown-body.theme-dark code { background: rgba(148, 163, 184, 0.18); }

/* Theme: sepia */
.markdown-body.theme-sepia { background: #f4ecd8; color: #433422; }
.markdown-body.theme-sepia h1, .markdown-body.theme-sepia h2 { border-color: #d9c9a3; }
.markdown-body.theme-sepia a { color: #9a3412; }
.markdown-body.theme-sepia blockquote { background: rgba(154, 128, 80, 0.12); border-left-color: #9a3412; color: #5b4a32; }

/* Theme: github */
.markdown-body.theme-github { background: #ffffff; color: #1f2328; font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif; }
.markdown-body.theme-github a { color: #0969da; }
.markdown-body.theme-github h1, .markdown-body.theme-github h2 { border-color: #d0d7de; }
.markdown-body.theme-github code { background: rgba(175, 184, 193, 0.2); }

/* ---------- Content / marketing pages ---------- */
.content { max-width: 1120px; margin: 0 auto; padding: clamp(2.5rem, 6vw, 5rem) 1.25rem; user-select: text; }
.content-header { max-width: 760px; margin-bottom: 2rem; }
.kicker { color: var(--accent); font-size: 0.78rem; font-weight: 850; letter-spacing: 0.08em; text-transform: uppercase; }
.content h1, .content h2 { margin: 0.35rem 0 0.8rem; line-height: 1.08; }
.content h1 { font-size: clamp(2.2rem, 5vw, 4.4rem); }
.content h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }
.lead { color: var(--ink-soft); font-size: clamp(1.05rem, 2vw, 1.25rem); line-height: 1.7; }

.grid-3, .grid-2 { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.plans-grid { display: grid; gap: 1rem; grid-template-columns: repeat(4, 1fr); align-items: stretch; }
@media (max-width: 1040px) { .plans-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .plans-grid { grid-template-columns: 1fr; } }

.plan { position: relative; display: flex; flex-direction: column; }
.plan .primary-btn, .plan .outline-btn { margin-top: auto; align-self: flex-start; }
.plan-tag {
  position: absolute; top: -0.7rem; right: 1rem;
  background: var(--yellow); color: #1d2433;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 0.22rem 0.6rem; border-radius: 999px; box-shadow: 0 4px 10px rgba(42, 34, 19, 0.18);
}

.info-card, .plan {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
  padding: 1.2rem;
  box-shadow: 0 10px 28px rgba(42, 34, 19, 0.07);
}
.info-card h3, .plan h3 { margin: 0 0 0.55rem; }
.info-card p, .plan p, .legal p, .legal li, .faq p { color: var(--ink-soft); line-height: 1.72; }
.plan.featured { color: #fffdf7; background: #1d2433; border-color: #1d2433; }
.plan.featured p, .plan.featured li { color: rgba(255, 253, 247, 0.8); }

.price { display: flex; align-items: baseline; gap: 0.45rem; margin: 0.8rem 0 1rem; }
.price strong { font-size: 2.4rem; }

.check-list { padding-left: 1.2rem; margin: 1rem 0; }
.check-list li { margin: 0.45rem 0; }

.faq { border-top: 1px solid var(--line); padding: 1.25rem 0; }
.faq h3 { margin: 0 0 0.35rem; }

/* ---------- Footer ---------- */
.site-footer { padding: 2.5rem 1.25rem; color: var(--ink-muted); background: #1d2433; }
.footer-inner { max-width: 1120px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-links a { color: #fffdf7; text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 9500; display: grid; place-items: center; padding: 1rem; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(29, 36, 51, 0.55); }
.modal-card {
  position: relative; width: min(520px, 100%);
  border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--paper-strong); box-shadow: var(--shadow); padding: 1.35rem;
}
.modal-card h2 { margin: 0 2rem 0.5rem 0; }
.modal-card p { color: var(--ink-soft); line-height: 1.6; }
.modal-close { position: absolute; top: 0.7rem; right: 0.7rem; width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 7px; background: #fffdf7; cursor: pointer; }
.form-grid { display: grid; gap: 0.8rem; margin-top: 1rem; }
.form-grid label { display: grid; gap: 0.32rem; color: var(--ink); font-weight: 750; }
.form-grid input { width: 100%; border: 1px solid var(--line-strong); border-radius: 7px; padding: 0.7rem 0.75rem; background: #fffdf7; }
.modal-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; }
.modal-error { color: var(--red); font-weight: 700; }

/* ---------- Static pages ---------- */
.page-card {
  width: min(760px, calc(100% - 2rem));
  margin: clamp(2rem, 8vw, 5rem) auto;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper-strong); box-shadow: var(--shadow);
  padding: clamp(1.5rem, 5vw, 3rem); user-select: text;
}
.page-card h1 { margin: 0 0 0.7rem; font-size: clamp(2rem, 5vw, 3.3rem); line-height: 1.08; }
.license-card { margin-top: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; background: #f8f4eb; }
.license-label { color: var(--ink-muted); font-size: 0.78rem; font-weight: 850; letter-spacing: 0.08em; }
.license-key-row { display: flex; gap: 0.75rem; align-items: center; justify-content: space-between; flex-wrap: wrap; margin: 0.55rem 0; }
.license-key-row code { font-size: 1.1rem; font-weight: 800; word-break: break-word; }
.legal { max-width: 820px; margin: 0 auto; padding: clamp(2.5rem, 6vw, 5rem) 1.25rem; user-select: text; }
.legal h1 { margin: 0 0 0.45rem; font-size: clamp(2rem, 5vw, 3.3rem); }
.legal h2 { margin: 2rem 0 0.6rem; }
.updated { color: var(--ink-muted); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  z-index: 9600;
  max-width: min(520px, 86vw);
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  color: #fff; background: rgba(29, 36, 51, 0.94);
  box-shadow: var(--shadow); font-weight: 650;
}

/* ---------- Hero (studio intro on marketing/index) ---------- */
.hero-strip { background: #1d2433; color: #fffdf7; padding: clamp(2rem, 5vw, 3.5rem) 1.25rem; }
.hero-inner { max-width: 1120px; margin: 0 auto; }
.hero-inner h1 { margin: 0.4rem 0 0.6rem; font-size: clamp(2rem, 4vw, 3.2rem); }
.hero-inner p { color: rgba(255, 253, 247, 0.82); max-width: 680px; line-height: 1.7; font-size: 1.1rem; }
.hero-inner .kicker { color: #a5b4fc; }
.hero-cta { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 1.2rem; }

@media (max-width: 860px) {
  .editor-body { grid-template-columns: 1fr; }
  .docs-panel { display: none; }
  .editor-shell, .editor-shell.mode-split { grid-template-columns: 1fr; }
  .editor-shell.mode-split .preview-pane { border-top: 1px solid var(--line); }
}