/* ===== Lint — Brand Stylesheet ===== */
:root {
  --teal-50: #f0fdfa;
  --teal-100: #ccfbf1;
  --teal-200: #99f6e4;
  --teal-400: #2dd4bf;
  --teal-500: #0d9488;
  --teal-600: #0f766e;
  --teal-700: #115e59;
  --teal-800: #134e4a;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --cyan-600: #0891b2;
  --red-400: #f87171;
  --red-500: #ef4444;
  --red-50: #fef2f2;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --white: #ffffff;
  --bg: var(--white);
  --bg-secondary: var(--slate-50);
  --bg-tertiary: var(--slate-100);
  --text-primary: var(--slate-900);
  --text-secondary: var(--slate-500);
  --text-tertiary: var(--slate-400);
  --border: var(--slate-200);
  --border-hover: var(--slate-300);
  --card-bg: var(--white);
}

[data-theme="dark"] {
  --bg: var(--slate-900);
  --bg-secondary: var(--slate-800);
  --bg-tertiary: var(--slate-700);
  --text-primary: var(--slate-100);
  --text-secondary: var(--slate-400);
  --text-tertiary: var(--slate-500);
  --border: var(--slate-700);
  --border-hover: var(--slate-600);
  --card-bg: var(--slate-800);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}
a { color: var(--teal-500); text-decoration: none; }
a:hover { color: var(--teal-600); }
.container { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 0.5px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.navbar .container {
  display: flex; align-items: center;
  height: 60px; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 6px; text-decoration: none; color: var(--text-primary); }
.logo-mark { width: 28px; height: 28px; flex-shrink: 0; }
.logo-text { font-size: 16px; font-weight: 600; letter-spacing: -0.3px; }
.logo-badge {
  font-size: 10px; font-weight: 500;
  background: var(--teal-100); color: var(--teal-700);
  padding: 2px 8px; border-radius: 4px;
  margin-left: 2px;
}
[data-theme="dark"] .logo-badge { background: var(--teal-800); color: var(--teal-400); }
.nav-links { display: flex; gap: 24px; }
.nav-links a { font-size: 13px; color: var(--text-secondary); transition: color 0.2s; }
.nav-links a:hover { color: var(--text-primary); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-email { font-size: 12px; color: var(--text-secondary); max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.theme-toggle {
  background: none; border: 0.5px solid var(--border); border-radius: 8px;
  width: 36px; height: 36px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--text-secondary);
  transition: all 0.2s;
}
.theme-toggle:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: inherit; font-size: 13px; font-weight: 500;
  padding: 8px 20px; border-radius: 8px; border: 0.5px solid var(--border);
  cursor: pointer; transition: all 0.2s;
  background: var(--card-bg); color: var(--text-primary);
  line-height: 1;
  white-space: nowrap;
}
.btn:hover { border-color: var(--border-hover); }
.btn-primary { background: var(--teal-500); color: var(--white); border-color: transparent; }
.btn-primary:hover { background: var(--teal-600); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 6px 14px; font-size: 12px; }

/* ===== Tool Page ===== */
.tool-page { padding: 0 0 48px; }
.tool-breadcrumb { font-size: 12px; color: var(--text-tertiary); margin-bottom: 8px; padding-top: 24px; }
.tool-breadcrumb a { color: var(--text-tertiary); }
.tool-breadcrumb a:hover { color: var(--teal-500); }
.tool-header-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.tool-header h1 { font-size: 22px; font-weight: 600; letter-spacing: -0.3px; }
.tool-header p { font-size: 13px; color: var(--text-secondary); margin-top: 4px; max-width: 500px; }

.usage-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 20px;
  font-size: 12px; white-space: nowrap;
  background: var(--teal-50); color: var(--teal-700);
  border: 0.5px solid var(--teal-200);
}
[data-theme="dark"] .usage-badge { background: #134e4a; color: var(--teal-400); border-color: var(--teal-800); }

/* ===== Tool Workspace ===== */
.tool-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 20px 0;
}
.tool-panel {
  background: var(--card-bg);
  border: 0.5px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  min-height: 400px;
}
.panel-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.panel-header h2 { font-size: 13px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.3px; }
.panel-header .char-count { font-size: 11px; color: var(--text-tertiary); }

/* Input */
.tool-input {
  width: 100%; min-height: 280px; padding: 12px;
  border: 0.5px solid var(--border); border-radius: 10px;
  background: var(--bg-secondary); color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; line-height: 1.7;
  resize: vertical;
  transition: border-color 0.2s;
}
.tool-input:focus { outline: none; border-color: var(--teal-500); }
.tool-input::placeholder { color: var(--text-tertiary); font-family: 'Inter', sans-serif; }

.tool-actions {
  display: flex; gap: 8px; align-items: center;
  margin-top: 12px; flex-wrap: wrap;
}
.tool-select {
  padding: 7px 12px; border-radius: 8px;
  border: 0.5px solid var(--border);
  background: var(--card-bg); color: var(--text-primary);
  font-family: inherit; font-size: 12px;
  cursor: pointer;
}

/* Result Panel */
.result-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 300px; color: var(--text-tertiary);
  text-align: center;
}
.lang-badge {
  font-size: 10px; background: var(--teal-50); color: var(--teal-600);
  padding: 2px 8px; border-radius: 4px; font-weight: 500;
}
[data-theme="dark"] .lang-badge { background: var(--teal-800); color: var(--teal-400); }
.result-empty svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.4; }
.result-empty p { font-size: 13px; }

/* Loading */
.loading-spinner {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 200px; gap: 12px;
}
.spinner-ring {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--teal-500); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-spinner p { font-size: 12px; color: var(--text-secondary); }

/* Result Content */
.result-text {
  padding: 12px; border-radius: 10px;
  background: var(--bg-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px; line-height: 1.8;
  min-height: 180px;
  max-height: 400px;
  overflow-y: auto;
}
.diff-line { display: flex; gap: 8px; padding: 1px 4px; border-radius: 3px; }
.diff-added { background: var(--teal-100); }
[data-theme="dark"] .diff-added { background: #134e4a; }
.diff-removed { background: var(--red-50); text-decoration: line-through; color: var(--red-400); }
[data-theme="dark"] .diff-removed { background: #450a0a; }
.diff-unchanged { color: var(--text-primary); }
.diff-marker { width: 16px; flex-shrink: 0; font-family: 'JetBrains Mono', monospace; font-size: 11px; }
.diff-added .diff-marker { color: var(--teal-600); }
.diff-removed .diff-marker { color: var(--red-400); }

/* Stats Bar */
.stats-bar {
  display: flex; gap: 20px; padding: 12px 0;
  margin-top: 12px;
  border-top: 0.5px solid var(--border);
  flex-wrap: wrap;
}
.stat-item { display: flex; align-items: center; gap: 6px; }
.stat-item .num { font-size: 16px; font-weight: 600; color: var(--teal-500); }
.stat-item .num.errors { color: var(--red-400); }
.stat-item .label { font-size: 12px; color: var(--text-secondary); margin-left: 2px; }
.stat-divider { width: 0.5px; height: 20px; background: var(--border); }

/* Result Actions */
.result-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; align-items: center; }

/* Conversion Card */
.conversion-card {
  margin-top: 16px;
  padding: 16px 20px; border-radius: 12px;
  background: var(--teal-50);
  border: 0.5px solid var(--teal-200);
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
[data-theme="dark"] .conversion-card { background: #134e4a; border-color: var(--teal-800); }
.conversion-card-text h3 { font-size: 14px; font-weight: 600; color: var(--teal-800); }
.conversion-card-text p { font-size: 12px; color: var(--teal-700); margin-top: 2px; }
[data-theme="dark"] .conversion-card-text h3 { color: var(--teal-400); }
[data-theme="dark"] .conversion-card-text p { color: var(--teal-400); }
.conversion-card .btn { flex-shrink: 0; }

/* Email Report */
.email-report-inline {
  margin-top: 12px;
  display: flex; gap: 8px; align-items: center;
  flex-wrap: wrap;
}
.email-input {
  padding: 8px 12px; border-radius: 8px;
  border: 0.5px solid var(--border);
  background: var(--card-bg); color: var(--text-primary);
  font-family: inherit; font-size: 12px;
  width: 200px;
}
.email-input:focus { outline: none; border-color: var(--teal-500); }
.email-privacy { font-size: 11px; color: var(--text-tertiary); margin-left: 4px; }

/* ===== Modals ===== */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4); z-index: 1000;
  display: flex; align-items: center; justify-content: center;
}
.modal {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 2rem;
  max-width: 400px; width: 90%;
  text-align: center;
}
.modal h2 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.modal-sub { font-size: 13px; color: var(--text-secondary); margin-bottom: 20px; }
.modal-body { display: flex; flex-direction: column; gap: 10px; }
.modal-input {
  padding: 10px 14px; border-radius: 8px;
  border: 0.5px solid var(--border);
  font-family: inherit; font-size: 13px;
  background: var(--bg-secondary); color: var(--text-primary);
}
.modal-input:focus { outline: none; border-color: var(--teal-500); }
.modal-btn { justify-content: center; width: 100%; }
.modal-skip {
  background: none; border: none; cursor: pointer;
  font-family: inherit; font-size: 12px; color: var(--text-tertiary);
  padding: 8px;
}
.modal-skip:hover { color: var(--text-secondary); }
.modal-legal { font-size: 11px; color: var(--text-tertiary); margin-top: 4px; }
.modal-option-link {
  display: block; padding: 12px 16px; border-radius: 10px;
  border: 0.5px solid var(--border); text-decoration: none;
  text-align: left; transition: border-color 0.2s;
}
.modal-option-link:hover { border-color: var(--teal-500); }
.modal-option-link strong { display: block; font-size: 14px; color: var(--text-primary); }
.modal-option-link span { font-size: 12px; color: var(--text-secondary); }
.modal-option-link.primary { background: var(--teal-50); border-color: var(--teal-200); }
[data-theme="dark"] .modal-option-link.primary { background: #134e4a; border-color: var(--teal-800); }

/* ===== Cookie Consent ===== */
.cookie-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--slate-900); color: var(--slate-100);
  padding: 14px 0; z-index: 999;
  display: none;
  font-size: 12px;
}
[data-theme="dark"] .cookie-bar { background: var(--slate-800); }
.cookie-bar.show { display: block; }
.cookie-bar .container { display: flex; align-items: center; gap: 16px; justify-content: space-between; }
.cookie-bar p { color: var(--slate-300); font-size: 12px; }
.cookie-bar a { color: var(--teal-400); text-decoration: underline; }
.cookie-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* ===== Footer ===== */
footer {
  border-top: 0.5px solid var(--border);
  padding: 40px 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
footer h4 { font-size: 12px; font-weight: 600; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-secondary); }
footer a, footer p { font-size: 13px; color: var(--text-secondary); }
footer a { display: block; margin-bottom: 6px; }
footer a:hover { color: var(--teal-500); }
.footer-bottom {
  border-top: 0.5px solid var(--border);
  margin-top: 32px; padding-top: 20px;
  display: flex; justify-content: space-between;
  font-size: 12px; color: var(--text-tertiary);
}
.footer-bottom a { display: inline; color: var(--text-tertiary); }
.footer-bottom a:hover { color: var(--teal-500); }

/* ===== Tools Index Page ===== */
.tools-index { padding: 60px 0; }
.hero-area { text-align: center; padding-bottom: 48px; }
.hero-area h1 { font-size: 32px; font-weight: 700; letter-spacing: -0.5px; }
.hero-area h1 span { color: var(--teal-500); }
.hero-area p { font-size: 14px; color: var(--text-secondary); max-width: 500px; margin: 12px auto 0; }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  padding-top: 32px;
}
.tool-card {
  background: var(--card-bg);
  border: 0.5px solid var(--border);
  border-radius: 14px; padding: 28px;
  transition: all 0.25s;
  cursor: pointer;
}
.tool-card:hover {
  border-color: var(--teal-500);
  transform: translateY(-2px);
}
.tool-card-icon {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 600; margin-bottom: 14px;
}
.tool-card-icon.green { background: var(--teal-100); color: var(--teal-600); }
.tool-card-icon.cyan { background: #e0f2fe; color: var(--cyan-600); }
.tool-card-icon.purple { background: #f3e8ff; color: #7c3aed; }
.tool-card-icon.teal { background: #ccfbf1; color: #0f766e; }
[data-theme="dark"] .tool-card-icon.green { background: #134e4a; color: var(--teal-400); }
[data-theme="dark"] .tool-card-icon.cyan { background: #0c4a6e; color: var(--cyan-400); }
[data-theme="dark"] .tool-card-icon.purple { background: #3b0764; color: #a78bfa; }
[data-theme="dark"] .tool-card-icon.teal { background: #134e4a; color: #5eead4; }
.tool-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.tool-card p { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.5; }
.tool-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tool-tag { font-size: 11px; padding: 4px 10px; border-radius: 6px; background: var(--bg-tertiary); color: var(--text-secondary); }

/* ===== Index Page: Hero Tabs ===== */
.hero { text-align:center; padding:72px 0 56px; background:linear-gradient(180deg,var(--bg) 0%,var(--bg-secondary) 100%); }
.hero h1 { font-size:32px; font-weight:700; letter-spacing:-0.5px; margin-bottom:12px; }
.hero h1 span { color:var(--teal-500); }
.hero p { font-size:14px; color:var(--text-secondary); max-width:520px; margin:0 auto 32px; }
.tool-tabs { display:inline-flex; gap:4px; background:var(--bg-tertiary); padding:4px; border-radius:10px; margin-bottom:16px; }
.tool-tab { padding:8px 20px; border-radius:8px; border:none; font-family:inherit; font-size:13px; font-weight:500; cursor:pointer; transition:all 0.2s; background:transparent; color:var(--text-secondary); }
.tool-tab.active { background:var(--card-bg); color:var(--text-primary); box-shadow:0 1px 3px rgba(0,0,0,0.06); }
[data-theme="dark"] .tool-tab.active { box-shadow:0 1px 3px rgba(0,0,0,0.3); }
.hero-input-area { display:flex; gap:8px; max-width:560px; margin:0 auto; }
.hero-input-area textarea { flex:1; padding:12px 16px; border-radius:10px; border:0.5px solid var(--border); background:var(--card-bg); color:var(--text-primary); font-family:inherit; font-size:13px; resize:vertical; min-height:48px; max-height:100px; transition:border-color 0.2s; }
.hero-input-area textarea:focus { outline:none; border-color:var(--teal-500); }
.hero-input-area textarea::placeholder { color:var(--text-tertiary); }
.hero-input-area .btn { height:48px; padding:0 28px; font-size:14px; }
.hero-remaining { font-size:12px; color:var(--teal-600); margin-top:12px; }
[data-theme="dark"] .hero-remaining { color:var(--teal-400); }

/* ===== Index Page: Section Common ===== */
section { padding:64px 0; }
.section-title { font-size:20px; font-weight:600; text-align:center; margin-bottom:8px; }
.section-subtitle { font-size:14px; color:var(--text-secondary); text-align:center; margin-bottom:40px; }
.comparison-section { background:var(--bg-secondary); }

/* ===== Comparison ===== */
.comparison-grid { display:grid; grid-template-columns:1fr 1fr; gap:40px; max-width:720px; margin:0 auto; }
.comparison-col h3 { font-size:15px; font-weight:600; margin-bottom:20px; padding-bottom:12px; border-bottom:0.5px solid var(--border); }
.comparison-col h3.us { color:var(--teal-500); }
.comparison-col h3.them { color:var(--text-tertiary); }
.comparison-item { display:flex; gap:10px; margin-bottom:14px; font-size:13px; line-height:1.5; }
.comparison-item .check { color:var(--teal-500); flex-shrink:0; }
.comparison-item .cross { color:var(--red-400); flex-shrink:0; }

/* ===== Stats ===== */
.stats-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; max-width:640px; margin:0 auto; }
.stat-card { text-align:center; padding:32px 20px; background:var(--card-bg); border:0.5px solid var(--border); border-radius:12px; }
.stat-number { font-size:32px; font-weight:700; color:var(--teal-500); }
.stat-label { font-size:13px; color:var(--text-secondary); margin-top:8px; }

/* ===== Pricing ===== */
.pricing-section { background:var(--bg-secondary); }
.pricing-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; max-width:800px; margin:0 auto; }
.pricing-card { background:var(--card-bg); border:0.5px solid var(--border); border-radius:14px; padding:28px 20px; text-align:center; transition:border-color 0.2s; }
.pricing-card.featured { border:1.5px solid var(--teal-500); }
.pricing-card h3 { font-size:14px; font-weight:600; margin-bottom:4px; }
.pricing-card .price { font-size:28px; font-weight:700; color:var(--teal-500); }
.pricing-card .price span { font-size:13px; color:var(--text-secondary); font-weight:400; }
.pricing-card ul { list-style:none; margin:16px 0; }
.pricing-card li { font-size:12px; color:var(--text-secondary); padding:4px 0; }

/* ===== CTA ===== */
.cta-section { background:var(--teal-500); text-align:center; padding:64px 0; }
.cta-section h2 { font-size:22px; color:var(--white); margin-bottom:12px; }
.cta-section p { font-size:14px; color:rgba(255,255,255,0.8); margin-bottom:28px; }
.cta-section .btn { background:var(--white); color:var(--teal-600); border:none; }
.cta-section .btn:hover { background:var(--slate-100); }

/* ===== Email Writer ===== */
.email-workspace { display:grid; grid-template-columns:1fr 1fr; gap:20px; padding:24px 0; }
.email-card { background:var(--card-bg); border:0.5px solid var(--border); border-radius:14px; padding:24px; }
.email-card h3 { font-size:15px; font-weight:600; margin-bottom:16px; }
.form-group { margin-bottom:12px; }
.form-group label { display:block; font-size:12px; color:var(--text-secondary); margin-bottom:4px; font-weight:500; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .tool-workspace { grid-template-columns: 1fr; }
  .email-workspace { grid-template-columns: 1fr; }
  .tool-header-row { flex-direction: column; }
  .tool-actions { flex-direction: column; }
  .tool-actions .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .cookie-bar .container { flex-direction: column; text-align: center; }
  .stats-bar { gap: 12px; }
  .email-report-inline { flex-direction: column; align-items: stretch; }
  .email-input { width: 100%; }
  .hero h1 { font-size:24px; }
  .hero-input-area { flex-direction:column; }
  .hero-input-area textarea { min-height:64px; }
  .comparison-grid { grid-template-columns:1fr; gap:24px; }
  .stats-grid { grid-template-columns:1fr; }
  .pricing-grid { grid-template-columns:repeat(2,1fr); }
  section { padding:40px 0; }
}
@media (max-width: 480px) {
  .tool-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding:40px 0 32px; }
  .hero h1 { font-size:20px; }
  .pricing-grid { grid-template-columns:1fr; }
  .hero-area h1 { font-size: 24px; }
}