/* ---------- Design tokens ---------- */
:root {
  --bg: #0b0d12;
  --bg-elev: #12151c;
  --bg-elev-2: #171b24;
  --border: #232838;
  --text: #e6e9f0;
  --text-dim: #8891a7;
  --text-faint: #5b6479;
  --accent: #7c9bff;
  --accent-2: #8ef6d0;
  --accent-soft: rgba(124, 155, 255, 0.14);
  --danger: #ff7a8a;
  --code-bg: #171c26;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  --radius: 10px;
  --font-ui: "Segoe UI", -apple-system, BlinkMacSystemFont, "Inter", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "Cascadia Code", "JetBrains Mono", Consolas, "SFMono-Regular", Menlo, Monaco, monospace;
}

body[data-theme="light"] {
  --bg: #f5f6fa;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0f1f6;
  --border: #e2e5ee;
  --text: #1b1e27;
  --text-dim: #5c6274;
  --text-faint: #9298ab;
  --accent: #5468e0;
  --accent-2: #14b891;
  --accent-soft: rgba(84, 104, 224, 0.1);
  --danger: #e5455c;
  --code-bg: #eef0f6;
  --shadow: 0 8px 24px rgba(20, 25, 50, 0.08);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: radial-gradient(1200px 600px at 20% -10%, var(--accent-soft), transparent),
              var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  overflow: hidden;
  transition: background 0.25s ease, color 0.25s ease;
}

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Topbar ---------- */
.topbar {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: -0.5px;
}

.brand-name {
  font-weight: 600;
  font-size: 14.5px;
  color: var(--text);
  letter-spacing: 0.2px;
}

.filename-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  max-width: 360px;
}

.filename-input {
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 6px 9px;
  border-radius: 7px;
  transition: all 0.15s ease;
}

.filename-input:hover {
  background: var(--bg-elev-2);
}

.filename-input:focus {
  outline: none;
  background: var(--bg-elev-2);
  border-color: var(--border);
  color: var(--text);
}

.dirty-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  opacity: 0;
  transition: opacity 0.2s ease;
  flex-shrink: 0;
}

.dirty-dot.show { opacity: 1; }

.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-shrink: 0;
}

.btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn:hover {
  background: var(--bg-elev-2);
  color: var(--text);
  border-color: var(--border);
}

.btn:active { transform: scale(0.97); }

.btn-accent {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, var(--accent-2)));
  color: #0b0d12;
  border-color: transparent;
  font-weight: 600;
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, var(--accent-2)));
  filter: brightness(1.08);
  color: #0b0d12;
}

.btn.icon-only { padding: 7px; }
.btn.icon-only span { display: none; }

.divider {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 4px;
}

/* ---------- Dışa aktar dropdown ---------- */
.dropdown {
  position: relative;
}

.chevron {
  width: 12px !important;
  height: 12px !important;
  margin-left: -2px;
  opacity: 0.7;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 220px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 60;
}

.dropdown-menu.show {
  display: flex;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 10px;
  border-radius: 7px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.dropdown-item svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  flex-shrink: 0;
}

.dropdown-item:hover {
  background: var(--bg-elev-2);
  color: var(--text);
}

.view-toggle {
  display: flex;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.seg {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--text-faint);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.seg svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
}

.seg:hover { color: var(--text-dim); }

.seg.active {
  background: var(--bg-elev);
  color: var(--accent);
  box-shadow: var(--shadow);
}

/* ---------- Workspace ---------- */
.workspace {
  flex: 1;
  display: flex;
  min-height: 0;
}

.pane {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pane-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-faint);
  padding: 10px 20px 6px;
  flex-shrink: 0;
  user-select: none;
}

/* ---------- Biçimlendirme araç çubuğu ---------- */
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px;
  padding: 4px 16px 8px;
  flex-shrink: 0;
}

.editor-toolbar button {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 5px 9px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  border-radius: 6px;
  font-size: 12.5px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}

.editor-toolbar button:hover {
  background: var(--bg-elev-2);
  border-color: var(--border);
  color: var(--text);
}

.editor-toolbar button:active {
  transform: scale(0.95);
}

.ed-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 3px;
  flex-shrink: 0;
}

#editor {
  flex: 1;
  width: 100%;
  resize: none;
  border: none;
  outline: none;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.7;
  padding: 4px 20px 20px;
  caret-color: var(--accent);
  tab-size: 2;
}

#editor::placeholder { color: var(--text-faint); }

.resizer {
  width: 6px;
  flex-shrink: 0;
  cursor: col-resize;
  position: relative;
  background: transparent;
}

.resizer::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
  transition: background 0.15s ease;
}

.resizer:hover::after,
.resizer.active::after {
  background: var(--accent);
  width: 2px;
  left: 2px;
}

.pane-preview {
  background: var(--bg-elev);
  border-left: 1px solid var(--border);
}

.preview {
  flex: 1;
  overflow-y: auto;
  padding: 4px 28px 40px;
}

/* view mode: hide panes */
.workspace[data-view="edit"] .pane-preview,
.workspace[data-view="edit"] .resizer { display: none; }
.workspace[data-view="preview"] .pane-edit,
.workspace[data-view="preview"] .resizer { display: none; }

/* ---------- Markdown rendered content ---------- */
.markdown-body {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text);
}

.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  font-weight: 650;
  line-height: 1.3;
  margin: 1.4em 0 0.6em;
  color: var(--text);
  letter-spacing: -0.2px;
}
.markdown-body h1:first-child, .markdown-body h2:first-child { margin-top: 0; }

.markdown-body h1 {
  font-size: 1.9em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
}
.markdown-body h2 {
  font-size: 1.5em;
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--border);
}
.markdown-body h3 { font-size: 1.25em; }
.markdown-body h4 { font-size: 1.08em; }
.markdown-body h5, .markdown-body h6 { font-size: 1em; color: var(--text-dim); }

.markdown-body p { margin: 0.7em 0; }

.markdown-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
}
.markdown-body a:hover { border-bottom-color: var(--accent); }

.markdown-body strong { font-weight: 700; color: var(--text); }
.markdown-body em { font-style: italic; }
.markdown-body del { color: var(--text-faint); }

.markdown-body code {
  font-family: var(--font-mono);
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.15em 0.4em;
  border-radius: 5px;
  font-size: 0.87em;
  color: var(--accent-2);
}

.markdown-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  margin: 1em 0;
}

.markdown-body pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 0.88em;
  line-height: 1.6;
}

/* highlight.js token renklerini koru, kendi kutu/arkaplan stilimizi uygula */
.markdown-body pre code.hljs {
  background: transparent;
  padding: 0;
}

.markdown-body blockquote {
  margin: 1em 0;
  padding: 0.4em 1em;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 6px 6px 0;
  color: var(--text-dim);
}
.markdown-body blockquote p { margin: 0.3em 0; }

.markdown-body ul, .markdown-body ol {
  padding-left: 1.5em;
  margin: 0.6em 0;
}
.markdown-body li { margin: 0.28em 0; }
.markdown-body li::marker { color: var(--text-faint); }

.markdown-body li.task-item { list-style: none; margin-left: -1.5em; padding-left: 1.5em; }
.markdown-body li.task-item input {
  margin-right: 0.5em;
  accent-color: var(--accent);
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.markdown-body img {
  max-width: 100%;
  border-radius: 8px;
  margin: 0.5em 0;
}

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 0.94em;
  display: block;
  overflow-x: auto;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.markdown-body th {
  background: var(--bg-elev-2);
  font-weight: 600;
}
.markdown-body tr:nth-child(even) td { background: color-mix(in srgb, var(--bg-elev-2) 40%, transparent); }

.preview:empty::before {
  content: "Önizleme burada görünecek…";
  color: var(--text-faint);
}

/* ---------- Statusbar ---------- */
.statusbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 12px;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.statusbar .dot { opacity: 0.5; }
.statusbar .spacer { flex: 1; }
#saveState { color: var(--text-faint); transition: color 0.2s ease; }
#saveState.saving { color: var(--accent); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 46px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 50;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- Scrollbars ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); background-clip: padding-box; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .brand-name { display: none; }
  .filename-wrap { max-width: 120px; }
  .btn span { display: none; }
  .btn { padding: 7px 9px; }
  .btn-accent span { display: none; }
  .dropdown-menu { right: auto; left: 0; }
}

/* ---------- PDF dışa aktarma (yazdırma) ---------- */
@media print {
  :root {
    --bg: #ffffff;
    --bg-elev: #ffffff;
    --bg-elev-2: #f3f4f8;
    --border: #d8dbe4;
    --text: #14161c;
    --text-dim: #3c4150;
    --text-faint: #6b7180;
    --accent: #3450c8;
    --accent-2: #0f9d76;
    --accent-soft: rgba(52, 80, 200, 0.08);
    --code-bg: #f2f3f7;
  }

  body { background: #fff !important; overflow: visible !important; }

  .topbar, .statusbar, .toast, .pane-edit, .resizer { display: none !important; }

  .app, .workspace { height: auto !important; display: block !important; }

  .pane-preview {
    border-left: none !important;
    width: 100% !important;
  }

  .pane-label { display: none !important; }

  .preview {
    overflow: visible !important;
    /* @page margin'i 0; tarayıcının kendi başlık/altbilgisini (URL, tarih, sayfa no)
       gizlemesi için gereklidir (Chromium sadece margin tam 0 iken bunları basmıyor).
       Görsel boşluğu burada kendimiz veriyoruz. */
    padding: 18mm 16mm !important;
  }

  .markdown-body table {
    display: table;
  }

  .markdown-body pre,
  .markdown-body table,
  .markdown-body blockquote,
  .markdown-body img {
    break-inside: avoid;
  }

  .markdown-body h1,
  .markdown-body h2,
  .markdown-body h3,
  .markdown-body h4 {
    break-after: avoid;
  }

  @page {
    margin: 0;
  }
}