/* ═══════════════════════════════════════
   JSON Checker — styles
   Auto dark/light via prefers-color-scheme
═══════════════════════════════════════ */

/* ── Tokens ── */
:root {
  --font-ui: 'Syne', sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  --accent: #00c896;
  --accent-dim: #00c89622;
  --accent-hover: #00b085;
  --danger: #ff4d6a;
  --danger-dim: #ff4d6a22;
  --warning: #ffb347;

  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.18s ease;
}

/* ── Light theme ── */
:root, [data-theme="light"] {
  --bg: #f5f6f8;
  --bg-surface: #ffffff;
  --bg-surface2: #f0f1f3;
  --bg-header: #ffffffdd;
  --border: #e2e4e9;
  --text: #1a1d23;
  --text-2: #5a6070;
  --text-3: #9099aa;
  --tab-active-bg: #ffffff;
  --code-bg: #f8f9fb;
  --shadow: 0 2px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
}

/* ── Dark theme ── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --bg-surface: #181c26;
    --bg-surface2: #1e2330;
    --bg-header: #181c26dd;
    --border: #2a2f3d;
    --text: #e8eaf0;
    --text-2: #8b93a8;
    --text-3: #555e73;
    --tab-active-bg: #1e2330;
    --code-bg: #13161f;
    --shadow: 0 2px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  }
}

[data-theme="dark"] {
  --bg: #0f1117;
  --bg-surface: #181c26;
  --bg-surface2: #1e2330;
  --bg-header: #181c26dd;
  --border: #2a2f3d;
  --text: #e8eaf0;
  --text-2: #8b93a8;
  --text-3: #555e73;
  --tab-active-bg: #1e2330;
  --code-bg: #13161f;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
}

[data-theme="light"] {
  --bg: #f5f6f8;
  --bg-surface: #ffffff;
  --bg-surface2: #f0f1f3;
  --bg-header: #ffffffdd;
  --border: #e2e4e9;
  --text: #1a1d23;
  --text-2: #5a6070;
  --text-3: #9099aa;
  --tab-active-bg: #ffffff;
  --code-bg: #f8f9fb;
  --shadow: 0 2px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo-bracket { color: var(--accent); font-size: 1.3rem; font-weight: 800; }
.logo-text strong { color: var(--accent); }

/* Tab nav */
.tab-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-2);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.tab-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.tab-btn:hover { background: var(--bg-surface2); color: var(--text); }
.tab-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

/* Theme toggle */
.theme-toggle {
  background: var(--bg-surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
  cursor: pointer;
  color: var(--text-2);
  display: flex;
  align-items: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle svg { width: 17px; height: 17px; }
.icon-moon { display: none; }

[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-moon { display: block; }
}

/* ── Ad Slots ── */
.ad-slot--banner {
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 8px 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.ad-placeholder {
  position: relative;
  width: 100%;
  max-width: 728px;
  height: 90px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  display: block;
  color: var(--text-3);
  font-size: 0.75rem;
  font-family: var(--font-code);
  background: var(--bg-surface2);
  overflow: hidden;
}
.ad-placeholder .adsbygoogle {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
}
.ad-placeholder > span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1;
  pointer-events: none;
}

/* ── Mock Ad Styling (triggered when unfilled) ── */
.ad-placeholder.is-unfilled {
  background: var(--bg-surface);
  border: 1px solid var(--accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px;
  gap: 10px;
  cursor: pointer;
  transition: background var(--transition);
}
.ad-placeholder.is-unfilled:hover { background: var(--accent-dim); }
.ad-placeholder.is-unfilled .adsbygoogle { display: none !important; }
.ad-placeholder.is-unfilled > span { display: none; }

.mock-content { display: none; flex-direction: column; align-items: center; gap: 8px; }
.ad-placeholder.is-unfilled .mock-content { display: flex; }
.mock-icon { font-size: 1.5rem; }
.mock-title { font-weight: 800; color: var(--accent); font-size: 0.75rem; text-transform: uppercase; }
.mock-text { font-size: 0.7rem; color: var(--text-2); line-height: 1.3; }

.ad-placeholder--vertical {
  width: 160px;
  height: 600px;
  max-width: 100%;
}

/* ── Main layout ── */
.main-layout {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  grid-template-areas: "main-content right-sidebar";
  gap: 20px;
  align-items: start;
}

.tool-area {
  grid-area: main-content;
  min-width: 0; /* Prevents content from blowing out the grid width */
}

.ad-slot--right {
  grid-area: right-sidebar;
}

.ad-slot--side {
  position: sticky;
  top: 80px;
}

@media (max-width: 1200px) {
  .main-layout { 
    grid-template-columns: 1fr; 
    grid-template-areas: "main-content";
  }
  .ad-slot--side { display: none; }
}

/* ── Tool panels ── */
.tool-panel { display: none; }
.tool-panel.active { display: block; }

.tool-header { margin-bottom: 20px; }
.tool-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 4px;
}
.tool-desc { color: var(--text-2); font-size: 0.9rem; }

/* ── Editor layout ── */
.editor-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: start;
}

@media (max-width: 768px) {
  .editor-layout { grid-template-columns: 1fr; }
  .editor-center { display: flex; justify-content: center; }
}

.editor-pane {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface2);
  gap: 8px;
  flex-wrap: wrap;
}
.editor-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
}
.editor-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.code-editor {
  width: 100%;
  min-height: 320px;
  padding: 14px;
  background: var(--code-bg);
  color: var(--text);
  border: none;
  outline: none;
  font-family: var(--font-code);
  font-size: 0.82rem;
  line-height: 1.7;
  resize: vertical;
  tab-size: 2;
}
.code-editor--output { color: var(--text-2); }
.code-editor::placeholder { color: var(--text-3); }

/* ── Run button ── */
.editor-center { display: flex; flex-direction: column; align-items: center; justify-content: center; padding-top: 48px; }

.run-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 4px 14px var(--accent-dim);
}
.run-btn svg { width: 22px; height: 22px; }
.run-btn:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,200,150,0.35); }
.run-btn:active { transform: translateY(0); }
.run-btn--sm { flex-direction: row; padding: 6px 12px; font-size: 0.8rem; }
.run-btn--sm svg { width: 15px; height: 15px; }

/* ── Small buttons ── */
.btn-sm {
  padding: 4px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-sm:hover { border-color: var(--accent); color: var(--accent); }

.indent-label { font-size: 0.78rem; color: var(--text-2); display: flex; align-items: center; gap: 4px; }
.indent-select {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  padding: 2px 6px;
  cursor: pointer;
}

/* ── Output panel ── */
.output-panel {
  min-height: 320px;
  padding: 14px;
  font-family: var(--font-code);
  font-size: 0.82rem;
  line-height: 1.7;
  background: var(--code-bg);
}
.output-idle { display: flex; align-items: center; justify-content: center; }
.output-idle-msg {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-3);
  text-align: center;
  font-family: var(--font-ui);
  font-size: 0.875rem;
}
.output-idle-msg svg { width: 36px; height: 36px; opacity: 0.4; }

.output-success {
  background: color-mix(in srgb, var(--accent) 8%, var(--code-bg));
  border-left: 3px solid var(--accent);
  padding: 14px 14px 14px 16px;
}
.output-error {
  background: color-mix(in srgb, var(--danger) 8%, var(--code-bg));
  border-left: 3px solid var(--danger);
  padding: 14px 14px 14px 16px;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.result-badge.ok { color: var(--accent); }
.result-badge.err { color: var(--danger); }
.result-badge svg { width: 20px; height: 20px; }

.error-detail {
  color: var(--danger);
  font-size: 0.82rem;
  margin-top: 6px;
  white-space: pre-wrap;
}
.success-detail { color: var(--text-2); font-size: 0.82rem; margin-top: 4px; }

/* ── Savings badge ── */
.savings-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-code);
}

/* ── Tree layout ── */
.tree-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items: start;
}
@media (max-width: 768px) { .tree-layout { grid-template-columns: 1fr; } }

.tree-panel {
  min-height: 400px;
  max-height: 600px;
  overflow-y: auto;
  padding: 14px;
  background: var(--code-bg);
  font-family: var(--font-code);
  font-size: 0.82rem;
  line-height: 1.7;
}

/* Tree nodes */
.tree-node { margin: 0; padding: 0; }
.tree-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3);
  font-size: 0.7rem;
  padding: 0 3px;
  transition: color var(--transition);
}
.tree-toggle:hover { color: var(--accent); }
.tree-key { color: var(--accent); }
.tree-str { color: #e67e5a; }
.tree-num { color: #7ec8e3; }
.tree-bool { color: var(--warning); }
.tree-null { color: var(--text-3); font-style: italic; }
.tree-children { margin-left: 18px; border-left: 1px dashed var(--border); padding-left: 10px; }
.tree-children.collapsed { display: none; }
.tree-summary { color: var(--text-3); font-size: 0.75rem; cursor: pointer; }
.tree-summary:hover { color: var(--accent); }

/* ── FAQ ── */
.faq-section {
  margin-top: 32px;
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.faq-section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  margin-top: 18px;
}
.faq-section h2:first-child { margin-top: 0; }
.faq-section p { font-size: 0.875rem; color: var(--text-2); }

/* ── Footer ── */
.site-footer {
  margin-top: 40px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 20px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}
@media (max-width: 640px) { .footer-inner { grid-template-columns: 1fr; } }

.footer-brand .logo-bracket { color: var(--accent); }
.footer-brand p { margin-top: 8px; font-size: 0.85rem; color: var(--text-2); max-width: 280px; }

.footer-links h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-3); margin-bottom: 10px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 6px; }
.footer-links a { font-size: 0.875rem; color: var(--text-2); }
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-3); text-align: center; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── Animations ── */
.tool-panel.active { animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }