/* ─── Reset & Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

:root {
  --topbar-h: 52px;
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-border: #e0e0e0;
  --color-text: #1a1a1a;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-publish: #059669;
  --color-publish-hover: #047857;
  --color-danger: #dc2626;
  --color-dirty: #f59e0b;
  --color-save: #404A51;
  --color-save-hover: #2d3439;
  --splitter-w: 6px;
  --panel-min: 280px;
  --radius: 6px;
}

html, body { height: 100%; overflow: hidden; font-family: system-ui, -apple-system, sans-serif; }
body { background: var(--color-bg); color: var(--color-text); }

/* ─── Login Page ─────────────────────────────────────────────────────────── */
body.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: auto;
}

.login-wrap { width: 100%; max-width: 400px; padding: 24px; }
.login-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 40px 36px;
  box-shadow: 0 4px 20px rgba(0,0,0,.08);
}
.login-logo {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 20px;
}
.login-title { font-size: 22px; font-weight: 600; margin-bottom: 28px; }

/* ─── Forms ──────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color .15s;
}
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--color-primary); }
.form-group textarea { resize: vertical; min-height: 72px; line-height: 1.5; }

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }
.btn-secondary { background: var(--color-border); color: var(--color-text); }
.btn-secondary:hover:not(:disabled) { background: #d1d5db; }
.btn-save { background: var(--color-save); color: #fff; }
.btn-save:hover:not(:disabled) { background: var(--color-save-hover); }
.btn-publish { background: var(--color-publish); color: #fff; }
.btn-publish:hover:not(:disabled) { background: var(--color-publish-hover); }
.btn-logout { background: transparent; color: var(--color-muted); border: 1px solid var(--color-border); }
.btn-logout:hover { background: var(--color-bg); }
.btn-full { width: 100%; justify-content: center; padding: 10px; font-size: 15px; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ─── Error / Status ─────────────────────────────────────────────────────── */
.error-msg {
  background: #fef2f2;
  color: var(--color-danger);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 14px;
}

/* ─── Top Bar ────────────────────────────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  gap: 12px;
  z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.topbar-brand { font-weight: 600; font-size: 14px; white-space: nowrap; }
.topbar-actions { display: flex; align-items: center; gap: 8px; }

.page-select {
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  max-width: 280px;
  min-width: 160px;
}
.page-select:focus { outline: none; border-color: var(--color-primary); }

.dirty-dot {
  color: var(--color-dirty);
  font-size: 16px;
  line-height: 1;
  margin-right: 2px;
  animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%,100% { opacity:1 } 50% { opacity:.4 } }

/* ─── Split Layout ───────────────────────────────────────────────────────── */
body.editor-page { display: flex; flex-direction: column; }

.split-container {
  display: flex;
  flex: 1;
  margin-top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow: hidden;
}

.panel {
  overflow-y: auto;
  min-width: var(--panel-min);
}

.panel-left {
  flex: 0 0 42%;
  background: var(--color-bg);
  padding: 16px;
}

.panel-right {
  flex: 1;
  background: #fff;
  position: relative;
}

.splitter {
  flex: 0 0 var(--splitter-w);
  background: var(--color-border);
  cursor: col-resize;
  transition: background .15s;
  position: relative;
}
.splitter::after {
  content: '⋮';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-muted);
  font-size: 18px;
  line-height: 1;
  pointer-events: none;
}
.splitter:hover, .splitter.dragging { background: var(--color-primary); }

.preview-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}
.preview-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  font-size: 14px;
  color: var(--color-muted);
  z-index: 2;
}

/* ─── Block Cards ────────────────────────────────────────────────────────── */
.blocks-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-muted);
  margin: 0 0 8px;
  padding: 0 2px;
}

.block-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.block-card:hover { border-color: #9ca3af; box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.block-card.is-visible { border-color: var(--color-primary); box-shadow: 0 0 0 2px rgba(37,99,235,.12); }

.block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px 6px;
  gap: 8px;
}
.block-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  background: #eff6ff;
  color: var(--color-primary);
  flex-shrink: 0;
}
.block-tag.tag-h1, .block-tag.tag-h2 { background: #f0fdf4; color: #15803d; }
.block-tag.tag-h3, .block-tag.tag-h4 { background: #fefce8; color: #854d0e; }
.block-tag.tag-li { background: #fdf4ff; color: #7e22ce; }

.block-label {
  font-size: 12px;
  color: var(--color-muted);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.block-actions { display: flex; gap: 4px; flex-shrink: 0; }

.block-body { padding: 0 10px 10px; }
.block-textarea {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
  line-height: 1.55;
  resize: vertical;
  min-height: 52px;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color .15s;
}
.block-textarea:focus { outline: none; border-color: var(--color-primary); background: #fff; }
.block-textarea.modified { background: #fffbeb; border-color: var(--color-dirty); }

/* Form actions section */
.form-actions-section {
  margin-top: 20px;
}
.form-action-row {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px;
  margin-bottom: 8px;
}
.form-action-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: 4px;
}
.form-action-input {
  width: 100%;
  padding: 6px 9px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 13px;
  font-family: monospace;
  color: var(--color-text);
  background: var(--color-bg);
}
.form-action-input:focus { outline: none; border-color: var(--color-primary); }

/* ─── Empty / Loading States ─────────────────────────────────────────────── */
.empty-state {
  padding: 40px 16px;
  text-align: center;
  color: var(--color-muted);
  font-size: 14px;
}
.loading-state {
  padding: 32px 16px;
  text-align: center;
  color: var(--color-muted);
  font-size: 14px;
}

/* ─── Modal ──────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--color-surface);
  border-radius: 10px;
  padding: 32px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal-title { font-size: 18px; font-weight: 600; margin-bottom: 14px; }
.modal-body { font-size: 14px; line-height: 1.6; color: var(--color-muted); margin-bottom: 24px; }
.modal-body strong { color: var(--color-text); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; }

/* ─── Toast ──────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  background: #1f2937;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
  transform: translateY(80px);
  opacity: 0;
  transition: transform .25s, opacity .25s;
  z-index: 300;
  pointer-events: none;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: var(--color-publish); }
.toast.error { background: var(--color-danger); }