/* ============================================================
   cuboMark – style.css
   Sections:
   1.  Tokens
   2.  Reset & Base
   3.  Background Orbs
   4.  Header
   5.  Formatting Toolbar
   6.  Workspace & Panes
   7.  Editor — line numbers + textarea
   8.  Preview — markdown typography
   9.  Status bar
   10. Mobile bottom nav
   11. Toast
   12. Animations & Keyframes
   13. Responsive
   ============================================================ */


/* ── 1. Tokens ── */
:root {
  --red:        #e34949;
  --red-dim:    #c93c3c;
  --red-glow:   rgba(227,73,73,0.2);

  --bg:           #f7f6f3;
  --surface:      #ffffff;
  --surface-2:    #f2f1ee;
  --border:       rgba(0,0,0,0.07);
  --border-strong:rgba(0,0,0,0.12);
  --text:         #1a1917;
  --text-2:       #6b6860;
  --text-3:       #b5b2aa;
  --shadow-sm:    0 1px 4px rgba(0,0,0,0.05);
  --shadow-md:    0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg:    0 12px 48px rgba(0,0,0,0.12);
  --glass:        rgba(247,246,243,0.88);
  --glass-border: rgba(0,0,0,0.07);

  /* Editor */
  --editor-bg:  #fafaf8;
  --editor-font:'DM Mono', 'Fira Code', monospace;
  --editor-size: 14px;
  --ln-bg:       #f2f1ee;
  --ln-text:     #c5c2ba;

  /* Preview typography */
  --prose-font: 'Lora', Georgia, serif;
  --prose-ui:   'DM Sans', sans-serif;
  --prose-size:  16px;
  --prose-line:  1.8;
  --prose-max:   680px;
  --prose-h:     #1a1917;
  --prose-code:  #c93c3c;
  --prose-code-bg: rgba(227,73,73,0.07);
  --prose-quote: #6b6860;
  --prose-quote-border: var(--red);
  --prose-hr:    rgba(0,0,0,0.08);
  --prose-link:  var(--red);
  --prose-th-bg: #f2f1ee;
}

[data-theme="dark"] {
  --bg:           #111110;
  --surface:      #1a1918;
  --surface-2:    #222120;
  --border:       rgba(255,255,255,0.07);
  --border-strong:rgba(255,255,255,0.12);
  --text:         #ede8e0;
  --text-2:       #8a8680;
  --text-3:       #4a4844;
  --glass:        rgba(17,17,16,0.9);
  --glass-border: rgba(255,255,255,0.06);

  --editor-bg:   #141312;
  --ln-bg:       #1a1918;
  --ln-text:     #3a3836;

  --prose-h:     #ede8e0;
  --prose-code:  #ff8080;
  --prose-code-bg: rgba(255,128,128,0.1);
  --prose-quote: #8a8680;
  --prose-hr:    rgba(255,255,255,0.08);
  --prose-th-bg: #222120;
  --shadow-sm:   0 1px 4px rgba(0,0,0,0.3);
  --shadow-md:   0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg:   0 12px 48px rgba(0,0,0,0.5);
}


/* ── 2. Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }

body {
  font-family: 'DM Sans', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}


/* ── 3. Background Orbs ── */
.bg-orbs {
  position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden;
}

.orb {
  position: absolute; border-radius: 50%;
  filter: blur(100px); opacity: 0.12;
  animation: orb-drift 22s ease-in-out infinite alternate;
}

.orb-1 {
  width: 600px; height: 600px;
  background: var(--red);
  top: -200px; right: -150px;
}

.orb-2 {
  width: 400px; height: 400px;
  background: #c8a96e;
  bottom: 50px; left: -120px;
  animation-delay: -8s;
}

[data-theme="dark"] .orb-2 { background: #8b6914; }


/* ── 4. Header ── */
header {
  position: relative; z-index: 50;
  height: 54px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--glass);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  flex-shrink: 0;
  animation: slide-down 0.4s ease both;
}

.logo-wrap {
  display: flex; align-items: center; gap: 9px;
  flex-shrink: 0;
}

.logo-icon {
  /* width: 30px; height: 30px; */
  background: var(--red); border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; box-shadow: 0 2px 8px var(--red-glow);
  transition: transform 0.2s ease;
  cursor: pointer; flex-shrink: 0;
}

.logo-icon:hover { transform: rotate(-5deg) scale(1.08); }
.logo-icon img   { width: 35px; height: 35px; object-fit: contain; }
.logo-name       { font-weight: 700; font-size: 1rem; letter-spacing: -0.02em; }
.logo-name span  { color: var(--red); }

/* Editable document title */
.header-centre { flex: 1; display: flex; justify-content: center; }

.doc-title-input {
  background: none; border: none; outline: none;
  font-family: 'Lora', serif;
  font-size: 0.9rem; font-weight: 500;
  color: var(--text-2);
  text-align: center;
  width: 100%; max-width: 320px;
  border-bottom: 1px solid transparent;
  padding: 2px 6px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.doc-title-input:focus {
  color: var(--text);
  border-bottom-color: var(--red);
}

.header-right {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}

/* Word count */
.word-count {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem; color: var(--text-3);
  display: flex; align-items: center; gap: 4px;
}

.wc-sep { color: var(--text-3); opacity: 0.5; }

/* View toggle */
.view-toggle {
  display: flex; gap: 2px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px; padding: 2px;
}

.vt-btn {
  width: 28px; height: 26px;
  border-radius: 6px; border: none;
  background: transparent; color: var(--text-3);
  font-size: 0.78rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.vt-btn.active {
  background: var(--red); color: #fff;
  box-shadow: 0 1px 6px var(--red-glow);
}

.vt-btn:not(.active):hover { color: var(--text); background: var(--surface); }

/* Theme toggle */
.theme-toggle {
  position: relative; width: 40px; height: 24px;
  border-radius: 12px; background: var(--surface-2);
  border: 1px solid var(--border); cursor: pointer;
  transition: background 0.3s ease;
}

.theme-toggle::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--text-3);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.3s ease;
}

[data-theme="dark"] .theme-toggle::after {
  transform: translateX(16px); background: var(--red);
}

.toggle-icons {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5px; pointer-events: none;
  font-size: 8px; color: var(--text-3);
}


/* ── 5. Formatting Toolbar ── */
.fmt-toolbar {
  position: relative; z-index: 40;
  display: flex; align-items: center;
  gap: 2px; flex-wrap: wrap;
  padding: 5px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  animation: slide-down 0.4s 0.05s ease both;
}

.fmt-group {
  display: flex; align-items: center; gap: 1px;
}

.fmt-group-right { margin-left: auto; }

.fmt-divider {
  width: 1px; height: 20px;
  background: var(--border);
  margin: 0 4px; flex-shrink: 0;
}

.fmt-btn {
  width: 32px; height: 30px;
  border-radius: 7px; border: none;
  background: transparent; color: var(--text-2);
  font-size: 0.8rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  gap: 1px; position: relative;
  transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.fmt-btn sub {
  font-size: 0.55rem; line-height: 1;
  color: var(--text-3); margin-top: 3px;
}

.fmt-btn:hover {
  background: var(--surface-2); color: var(--red);
  transform: translateY(-1px);
}

.fmt-btn:active { transform: translateY(0); }


/* ── 6. Workspace & Panes ── */
.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative; z-index: 1;
  animation: fade-up 0.4s 0.1s ease both;
}

.pane {
  display: flex; flex-direction: column;
  overflow: hidden; flex: 1;
}

.pane-label {
  font-size: 0.62rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3);
  padding: 7px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  display: flex; align-items: center; gap: 6px;
}

/* Pane draggable divider */
.pane-divider {
  width: 4px; flex-shrink: 0;
  background: var(--border);
  cursor: col-resize;
  position: relative;
  transition: background 0.2s ease;
}

.pane-divider:hover,
.pane-divider.dragging { background: var(--red); }

.pane-divider::before {
  content: '';
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 2px; height: 32px;
  border-radius: 2px;
  background: var(--text-3); opacity: 0.4;
}


/* ── 7. Editor ── */
.editor-pane { border-right: 1px solid var(--border); }

.editor-wrap {
  flex: 1; display: flex; overflow: hidden;
}

.line-numbers {
  flex-shrink: 0; width: 44px;
  padding: 14px 0;
  background: var(--ln-bg);
  border-right: 1px solid var(--border);
  text-align: right;
  font-family: var(--editor-font);
  font-size: var(--editor-size);
  color: var(--ln-text);
  line-height: 1.7;
  overflow: hidden; user-select: none;
  transition: background 0.35s ease;
}

.line-numbers span { display: block; padding: 0 10px 0 4px; }

.md-editor {
  flex: 1; border: none; outline: none; resize: none;
  background: var(--editor-bg);
  color: var(--text);
  font-family: var(--editor-font);
  font-size: var(--editor-size);
  line-height: 1.7;
  padding: 14px 18px;
  overflow-y: auto; overflow-x: hidden;
  white-space: pre-wrap; word-wrap: break-word;
  caret-color: var(--red);
  transition: background 0.35s ease, color 0.35s ease;
}

.md-editor::placeholder {
  color: var(--text-3); font-style: italic;
}


/* ── 8. Preview — markdown typography ── */
.preview-pane { background: var(--surface); }

.preview-wrap {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  padding: 32px 40px;
}

.md-preview {
  max-width: var(--prose-max);
  margin: 0 auto;
  font-family: var(--prose-font);
  font-size: var(--prose-size);
  line-height: var(--prose-line);
  color: var(--text);
}

.preview-placeholder {
  color: var(--text-3); font-style: italic;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
}

/* Headings */
.md-preview h1,
.md-preview h2,
.md-preview h3,
.md-preview h4,
.md-preview h5,
.md-preview h6 {
  font-family: var(--prose-font);
  color: var(--prose-h);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 1.6em 0 0.5em;
  line-height: 1.25;
}

.md-preview h1 { font-size: 2rem; border-bottom: 2px solid var(--border); padding-bottom: 0.3em; }
.md-preview h2 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.2em; }
.md-preview h3 { font-size: 1.2rem; }
.md-preview h4 { font-size: 1rem; }
.md-preview h5 { font-size: 0.9rem; }
.md-preview h6 { font-size: 0.85rem; color: var(--text-2); }

/* Paragraph */
.md-preview p { margin: 0.9em 0; }

/* Links */
.md-preview a {
  color: var(--prose-link);
  text-decoration: underline;
  text-decoration-color: var(--red-glow);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s ease;
}

.md-preview a:hover { text-decoration-color: var(--red); }

/* Bold & italic */
.md-preview strong { font-weight: 700; color: var(--prose-h); }
.md-preview em     { font-style: italic; }

/* Inline code */
.md-preview code {
  font-family: var(--editor-font);
  font-size: 0.85em;
  color: var(--prose-code);
  background: var(--prose-code-bg);
  padding: 2px 6px;
  border-radius: 5px;
}

/* Code block */
.md-preview pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.2em 0;
}

.md-preview pre code {
  color: var(--text);
  background: none;
  padding: 0;
  font-size: 0.83rem;
  line-height: 1.65;
}

/* Blockquote */
.md-preview blockquote {
  border-left: 3px solid var(--prose-quote-border);
  margin: 1.2em 0;
  padding: 10px 20px;
  background: rgba(227,73,73,0.04);
  border-radius: 0 10px 10px 0;
  color: var(--prose-quote);
  font-style: italic;
}

.md-preview blockquote p { margin: 0; }

/* Lists */
.md-preview ul,
.md-preview ol {
  padding-left: 1.6em;
  margin: 0.8em 0;
}

.md-preview li { margin: 0.3em 0; }

.md-preview li input[type="checkbox"] {
  margin-right: 6px;
  accent-color: var(--red);
}

/* Horizontal rule */
.md-preview hr {
  border: none;
  border-top: 2px solid var(--prose-hr);
  margin: 2em 0;
}

/* Tables */
.md-preview table {
  width: 100%; border-collapse: collapse;
  margin: 1.2em 0; font-size: 0.9rem;
  font-family: 'DM Sans', sans-serif;
}

.md-preview th {
  background: var(--prose-th-bg);
  font-weight: 600; font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem; letter-spacing: 0.03em;
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
}

.md-preview td {
  padding: 9px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
}

.md-preview tr:nth-child(even) td {
  background: rgba(0,0,0,0.02);
}

[data-theme="dark"] .md-preview tr:nth-child(even) td {
  background: rgba(255,255,255,0.02);
}

/* Images */
.md-preview img {
  max-width: 100%;
  border-radius: 10px;
  margin: 0.8em 0;
  box-shadow: var(--shadow-md);
}

/* Strikethrough */
.md-preview del { opacity: 0.5; }


/* ── 9. Status bar ── */
.status-bar {
  position: relative; z-index: 40;
  height: 28px;
  padding: 0 14px;
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.status-left, .status-right {
  display: flex; align-items: center; gap: 8px;
}

.status-item {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.7rem; color: var(--text-3);
  font-family: 'DM Sans', sans-serif;
}

.status-item i { font-size: 0.65rem; }
.status-sep { color: var(--border); }


/* ── 10. Mobile bottom nav ── */
.mobile-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  z-index: 200;
  background: var(--glass);
  border-top: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 8px 0 max(8px, env(safe-area-inset-bottom));
}

.mob-btn {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; gap: 4px;
  padding: 6px 0; border: none; background: none;
  color: var(--text-3); font-family: 'DM Sans', sans-serif;
  font-size: 0.65rem; font-weight: 500; cursor: pointer;
  transition: color 0.2s ease;
}

.mob-btn i { font-size: 1rem; }
.mob-btn.active { color: var(--red); }


/* ── 11. Toast ── */
.toast {
  position: fixed; bottom: 36px; left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--text); color: var(--bg);
  padding: 10px 20px; border-radius: 24px;
  font-size: 0.82rem; font-weight: 500;
  box-shadow: var(--shadow-lg); opacity: 0; z-index: 999;
  white-space: nowrap; pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), opacity 0.3s ease;
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }


/* ── 12. Animations ── */
@keyframes slide-down {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes orb-drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(40px,50px) scale(1.12); }
}


/* ── 13. Responsive ── */

/* Tablet — hide word count label, compress header */
@media (max-width: 900px) {
  .preview-wrap { padding: 24px 24px; }
}

/* Mobile — full width single pane, bottom nav */
@media (max-width: 680px) {
  body { overflow: auto; }

  .workspace {
    flex-direction: column;
    height: calc(100vh - 54px - 41px - 28px - 56px);
    overflow: hidden;
  }

  .pane { flex: 1 0 100%; min-width: 100%; }
  .pane-divider { display: none; }
  .editor-pane { border-right: none; }

  /* Mobile view switching */
  .workspace[data-mview="edit"]    .preview-pane { display: none; }
  .workspace[data-mview="preview"] .editor-pane  { display: none; }

  .mobile-nav { display: flex; }

  /* Compress toolbar on mobile */
  .fmt-toolbar {
    gap: 1px; padding: 4px 8px;
    overflow-x: auto; flex-wrap: nowrap;
  }

  .fmt-toolbar::-webkit-scrollbar { display: none; }
  .fmt-group-right { margin-left: 0; }

  .word-count   { display: none; }
  .header-centre { display: none; }

  .preview-wrap { padding: 20px 16px; }
  .status-bar   { display: none; }

  .toast { bottom: 72px; }
}

@media (max-width: 380px) {
  .logo-name { font-size: 0.9rem; }
  .logo-icon {  border-radius: 18px; }
  .logo-icon img { width: 25px; height: 25px; }
  .vt-btn    { width: 24px; height: 22px; }
  .fmt-btn   { width: 28px; height: 26px; font-size: 0.72rem; }
}

@media (max-width: 300px) {
  header { padding: 0 10px; height: 48px; }
  .logo-name { font-size: 0.82rem; }
  .fmt-toolbar { padding: 3px 6px; }
  .fmt-btn { width: 26px; height: 24px; font-size: 0.68rem; }
  .theme-toggle { width: 34px; height: 20px; }
  .theme-toggle::after { width: 13px; height: 13px; }
  [data-theme="dark"] .theme-toggle::after { transform: translateX(14px); }
  .mobile-nav { padding: 6px 0; }
  .mob-btn { font-size: 0.6rem; }
  .toast { font-size: 0.72rem; padding: 8px 14px; }
}