:root {
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --surface: #ffffff;
  --surface-2: #f6f8fa;
  --border: #d0d7de;
  --border-muted: #d8dee4;
  --text: #1f2328;
  --text-2: #57606a;
  --text-3: #8b949e;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --accent-subtle: #ddf4ff;
  --accent-light: #e8f0fe;
  --success: #1a7f37;
  --success-subtle: #dafbe1;
  --danger: #cf222e;
  --danger-subtle: #ffebe9;
  --warning: #9a6700;
  --warning-subtle: #fff8c5;
  --radius: 6px;
  --radius-lg: 8px;
  --radius-md: 6px;
  --shadow: 0 1px 0 rgba(31,35,40,0.04);
  --shadow-md: 0 3px 10px rgba(31,35,40,0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --ease: .15s ease;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --surface: #161b22;
  --surface-2: #21262d;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #e6edf3;
  --text-2: #8b949e;
  --text-3: #6e7681;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --accent-subtle: #388bfd26;
  --accent-light: #388bfd1a;
  --success: #3fb950;
  --success-subtle: #238636;
  --danger: #f85149;
  --danger-subtle: #f8514933;
  --warning: #d29922;
  --warning-subtle: #9e6a03;
  --shadow: 0 1px 0 rgba(0,0,0,0.3);
  --shadow-md: 0 3px 10px rgba(0,0,0,0.4);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.5; transition: background var(--ease), color var(--ease); min-height: 100vh; display: flex; flex-direction: column; }
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--accent-hover); text-decoration: underline; }
button { font-family: var(--font); cursor: pointer; }
input, select, textarea { font-family: var(--font); }

.container { max-width: 960px; margin: 0 auto; padding: 0 1rem; width: 100%; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 100; background: var(--bg-subtle); border-bottom: 1px solid var(--border-muted); backdrop-filter: blur(12px); }
.nav-inner { max-width: 960px; margin: 0 auto; padding: 0 1rem; display: flex; align-items: center; gap: 1rem; height: 48px; }
.nav-logo { display: flex; align-items: center; gap: .5rem; font-weight: 600; font-size: .95rem; color: var(--text); white-space: nowrap; }
.nav-logo .status-badge { font-size: .55rem; padding: .1rem .4rem; }
.nav-logo-icon { width: 22px; height: 22px; border-radius: 4px; }
.nav-links { display: flex; gap: .15rem; margin-left: auto; align-items: center; }
.nav-link { background: none; border: none; padding: .35rem .65rem; border-radius: var(--radius-md); font-size: .8rem; font-weight: 500; color: var(--text-2); transition: var(--ease); text-decoration: none; white-space: nowrap; cursor: pointer; border: 1px solid transparent; }
.nav-link:hover { color: var(--text); background: var(--surface-2); }
.nav-link.active { color: var(--text); background: var(--surface); border-color: var(--border-muted); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: .5rem; margin-left: auto; }
.icon-btn { width: 32px; height: 32px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--surface); color: var(--text-2); display: grid; place-items: center; transition: var(--ease); font-size: .8rem; }
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* Dropdowns */
.dropdown { position: relative; }
.dropdown-toggle { display: flex; align-items: center; gap: .25rem; }
.dropdown-toggle span { display: block; }
.dropdown-toggle i { font-size: .6rem; transition: transform .2s ease; }
.dropdown:hover .dropdown-toggle i { transform: rotate(180deg); }
.dropdown-menu { position: absolute; top: calc(100% + 4px); left: 50%; transform: translateX(-50%); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); min-width: 220px; padding: .35rem; opacity: 0; visibility: hidden; transition: opacity .15s ease, visibility .15s ease; z-index: 200; }
.dropdown-menu.right { left: auto; right: 0; transform: none; }
.dropdown:hover .dropdown-menu, .dropdown.open .dropdown-menu { opacity: 1; visibility: visible; }
.dropdown-item { display: block; padding: .5rem .65rem; border-radius: var(--radius-md); font-size: .8rem; font-weight: 400; color: var(--text-2); text-decoration: none; transition: var(--ease); }
.dropdown-item:hover { background: var(--accent-subtle); color: var(--accent); border-color: transparent; }
.dropdown-item.active { background: var(--accent-subtle); color: var(--accent); font-weight: 600; }
.dropdown-divider { height: 1px; background: var(--border); margin: .35rem .5rem; }
.dropdown-label { padding: .35rem .65rem .15rem; font-size: .65rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-3); }

/* Mega Menu */
.dropdown.mega .dropdown-menu { left: 0; transform: none; left: 50%; transform: translateX(-50%); max-width: 640px; width: max-content; }
.mega-menu-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .25rem; }
.mega-menu-grid .dropdown-label { grid-column: span 2; padding: .5rem .65rem .25rem; font-size: .75rem; }
.mega-menu-grid .dropdown-item { padding: .45rem .65rem; display: flex; align-items: center; gap: .5rem; }
.mega-menu-grid .dropdown-item i { width: 18px; color: var(--accent); }
.dropdown.mega:hover .dropdown-menu { opacity: 1; visibility: visible; }
.dropdown-item div { display: flex; flex-direction: column; line-height: 1.3; flex: 1; }
.dropdown-item small { font-size: .65rem; color: var(--text-3); font-weight: 400; }
.dropdown-item .badge { display: inline-block; font-size: .55rem; font-weight: 600; padding: .1rem .35rem; border-radius: 99px; background: var(--accent-subtle); color: var(--accent); margin-left: .35rem; vertical-align: middle; }
.dropdown-footer { padding: .5rem .65rem; border-top: 1px solid var(--border); margin-top: .25rem; }

@media (min-width: 769px) {
  .dropdown.mega .dropdown-menu { left: 50%; transform: translateX(-50%); }
}

/* Status Badge */
.status-badge { display: inline-flex; align-items: center; gap: .35rem; font-size: .7rem; font-weight: 500; padding: .25rem .5rem; border-radius: 99px; background: var(--success-subtle); color: var(--success); }
.status-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-badge.offline { background: var(--danger-subtle); color: var(--danger); }

/* Code Blocks */
.code-block { background: var(--bg-subtle); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1rem; font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, monospace; font-size: .8rem; overflow-x: auto; }
.code-block code { color: var(--text); }
.code-block .keyword { color: #cf222e; }
.code-block .string { color: #0a3069; }
.code-block .comment { color: var(--text-3); font-style: italic; }
.code-block .function { color: #8250df; }
.code-block .number { color: #0550ae; }

/* Command Palette */
.cmd-palette-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1000; display: none; align-items: flex-start; justify-content: center; padding-top: 10vh; }
.cmd-palette-backdrop.open { display: flex; }
.cmd-palette { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); width: 100%; max-width: 560px; box-shadow: var(--shadow-lg); overflow: hidden; }
.cmd-palette-input { width: 100%; padding: .85rem 1rem; border: none; border-bottom: 1px solid var(--border); background: var(--surface); color: var(--text); font-size: 1rem; }
.cmd-palette-input:focus { outline: none; }
.cmd-palette-results { max-height: 360px; overflow-y: auto; padding: .35rem; }
.cmd-result { display: flex; align-items: center; gap: .65rem; padding: .5rem .65rem; border-radius: var(--radius-md); cursor: pointer; color: var(--text-2); font-size: .85rem; }
.cmd-result:hover, .cmd-result.selected { background: var(--accent-subtle); color: var(--accent); }
.cmd-result i { width: 18px; color: var(--text-3); }
.cmd-result small { margin-left: auto; font-size: .7rem; color: var(--text-3); }
.cmd-result-kbd { font-size: .65rem; padding: .15rem .35rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: 4px; color: var(--text-3); }

/* Keyboard Shortcut Hint */
.kbd-hint { position: fixed; bottom: 1rem; right: 1rem; font-size: .7rem; color: var(--text-3); background: var(--surface); border: 1px solid var(--border); padding: .25rem .5rem; border-radius: var(--radius-md); }
.kbd-hint kbd { background: var(--surface-2); border: 1px solid var(--border); border-radius: 3px; padding: .1rem .3rem; margin-left: .35rem; font-family: inherit; }

/* Mobile hamburger */
.mobile-toggle { display: none; width: 32px; height: 32px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--surface); color: var(--text-2); align-items: center; justify-content: center; margin-left: auto; }
.mobile-menu { display: none; position: fixed; top: 48px; left: 0; right: 0; bottom: 0; z-index: 99; background: var(--bg); padding: 1rem; flex-direction: column; gap: .25rem; overflow-y: auto; }
.mobile-menu.open { display: flex; }
.mobile-menu a { display: block; padding: .65rem .75rem; border-radius: var(--radius-md); font-size: .9rem; font-weight: 500; color: var(--text-2); text-decoration: none; border: 1px solid transparent; }
.mobile-menu a:hover, .mobile-menu a.active { background: var(--accent-subtle); color: var(--accent); }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: flex; }
}

/* Hero */
.hero { background: var(--bg); border-bottom: 1px solid var(--border-muted); padding: 3.5rem 1rem 3rem; }
.hero-inner { max-width: 640px; margin: 0 auto; text-align: center; }
.hero-title { font-size: 2rem; font-weight: 600; margin-bottom: .75rem; letter-spacing: -.02em; line-height: 1.25; }
.hero-subtitle { color: var(--text-2); font-size: 1rem; margin-bottom: 1.75rem; line-height: 1.65; max-width: 540px; margin-left: auto; margin-right: auto; }

/* Section */
.section { padding: 2.5rem 0; }
.section-sm { padding: 1.75rem 0; }
.section-title { font-size: 1.25rem; font-weight: 600; margin-bottom: .25rem; }
.section-sub { color: var(--text-2); font-size: .88rem; margin-bottom: 1.5rem; }
.divider { border: none; border-top: 1px solid var(--border-muted); margin: 1.75rem 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .35rem; padding: .45rem 1rem; border-radius: var(--radius-md); font-size: .8rem; font-weight: 600; border: 1px solid rgba(27,31,36,0.15); transition: .2s cubic-bezier(0.3, 0, 0.5, 1); text-decoration: none; cursor: pointer; }
.btn-primary { background: #0969da; color: #ffffff; border-color: rgba(27,31,36,0.15); }
.btn-primary:hover { background: #0550ae; color: #ffffff; }
.btn-outline { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--surface-2); color: var(--text); border-color: var(--text-2); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); border-color: transparent; }
.btn-danger { background: var(--danger); color: #ffffff; border-color: rgba(27,31,36,0.15); }
.btn-danger:hover { background: #cf222e; color: #ffffff; }
.btn-sm { padding: .3rem .75rem; font-size: .75rem; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.25rem; transition: var(--ease); }

/* Feature grid */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.feature-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1rem; transition: var(--ease); }
.feature-card:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
.feature-icon { width: 32px; height: 32px; border-radius: var(--radius-md); background: var(--surface-2); display: grid; place-items: center; margin-bottom: .65rem; font-size: .85rem; color: var(--accent); }
.feature-title { font-size: .88rem; font-weight: 600; margin-bottom: .35rem; }
.feature-desc { font-size: .8rem; color: var(--text-2); line-height: 1.55; }

/* Bullet list */
.bullet-list { margin: 1rem 0; display: flex; flex-direction: column; gap: .45rem; }
.bullet-item { display: flex; gap: .5rem; align-items: flex-start; font-size: .88rem; }
.bullet-dot { color: var(--text-3); font-weight: 600; flex-shrink: 0; margin-top: 1px; }

/* Price table */
.price-table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .85rem; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.price-table tr { border-bottom: 1px solid var(--border); }
.price-table td { padding: .6rem .75rem; }
.price-table tr:last-child { border-bottom: none; }
.price-highlight { background: var(--accent-subtle); }
.price-highlight td { font-weight: 600; }
.text-accent { color: var(--accent); font-weight: 600; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: .8rem; font-weight: 600; margin-bottom: .35rem; color: var(--text); }
.form-input, .form-textarea, .form-select { width: 100%; padding: .5rem .65rem; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface); color: var(--text); font-size: .85rem; transition: var(--ease); }
.form-input:focus, .form-textarea:focus, .form-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-subtle); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-row { display: flex; gap: 1rem; align-items: flex-start; }
.form-row-label { flex: 0 0 110px; padding-top: .5rem; font-size: .8rem; font-weight: 600; color: var(--text); }
.form-row-field { flex: 1; max-width: 400px; }
@media (max-width: 768px) {
  .form-row { flex-direction: column; }
  .form-row-label { flex: none; padding-top: 0; }
  .form-row-field { max-width: 100%; }
}

/* Radio group */
.radio-group { display: flex; flex-direction: column; gap: .45rem; }
.radio-label { display: flex; align-items: center; gap: .45rem; font-size: .85rem; cursor: pointer; }
.radio-label input { accent-color: var(--accent); }

/* Contact table */
.contact-table { width: 100%; max-width: 480px; }
.contact-table td { padding: .4rem .5rem; font-size: .85rem; vertical-align: top; }
.contact-table td:first-child { font-weight: 600; text-align: right; color: var(--text-2); white-space: nowrap; }

/* FAQ */
.faq-item { margin-bottom: 1.25rem; border-bottom: 1px solid var(--border-muted); padding-bottom: 1.25rem; }
.faq-item:last-child { border-bottom: none; }
.faq-q { font-weight: 600; font-size: .9rem; margin-bottom: .35rem; }
.faq-a { font-size: .85rem; color: var(--text-2); line-height: 1.65; }

/* Hero image float */
.img-float { float: right; margin: 0 0 1rem 1.5rem; border-radius: var(--radius); }
@media (max-width: 768px) {
  .img-float { float: none; margin: 0 0 1rem 0; }
}

/* Footer */
.footer { border-top: 1px solid var(--border-muted); padding: 1.25rem 0; text-align: center; color: var(--text-3); font-size: .75rem; margin-top: auto; }
.footer a { color: var(--text-3); text-decoration: none; }
.footer a:hover { color: var(--accent); text-decoration: underline; }

/* Animations */
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp .35s ease both; }

/* Quiz / Assessment */
.quiz-container { max-width: 640px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; box-shadow: var(--shadow); }
.progress-container { margin-bottom: 1.75rem; }
.progress-bar { width: 100%; height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); transition: width .3s ease; }
.progress-text { text-align: center; font-size: .75rem; color: var(--text-3); margin: .35rem 0 0; }
.quiz-step { display: none; }
.quiz-step.active { display: block; animation: fadeUp .35s ease both; }
.checkbox-group { display: flex; flex-direction: column; gap: .45rem; }
.checkbox-label { display: flex; align-items: flex-start; gap: .5rem; font-size: .85rem; font-weight: 400; cursor: pointer; padding: .5rem; border-radius: var(--radius-md); transition: background var(--ease); background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.checkbox-label:hover { background: var(--surface-2); }
.checkbox-label input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; margin-top: 2px; }
.form-actions { display: flex; gap: .65rem; justify-content: flex-end; margin-top: 1.75rem; }
.required { color: var(--danger); }

@media (max-width: 768px) {
  .quiz-container { padding: 1rem; }
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; justify-content: center; }
}

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 2.5rem 1rem 2rem; }
  .hero-title { font-size: 1.65rem; }
  .section { padding: 1.75rem 0; }
  .container { padding: 0 .75rem; }
  .feature-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.4rem; }
}

/* City List Styles */
.city-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.city-list a {
  display: block;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: all var(--ease);
}

.city-list a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.cities-grid {
  margin: 2rem 0;
}