@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-0: #06080f;
  --bg-1: #0c0f1a;
  --bg-2: #111522;
  --bg-3: #161b2e;
  --bg-hover: #1c2238;
  --border: #1e2638;
  --border-strong: #293452;
  --text-1: #eef0f8;
  --text-2: #9ba4bf;
  --text-3: #5a6382;
  --blue: #5b8cf7;
  --blue-dim: #3a6ae8;
  --purple: #9d71f5;
  --purple-dim: #7c52d4;
  --green: #3ecf8e;
  --orange: #f97316;
  --red: #f7605b;
  --yellow: #fbbf24;
  --cyan: #22d3ee;
  --gradient: linear-gradient(135deg, #5b8cf7 0%, #9d71f5 100%);
  --gradient-warm: linear-gradient(135deg, #f97316 0%, #f7605b 100%);
  --gradient-green: linear-gradient(135deg, #3ecf8e 0%, #22d3ee 100%);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --r: 8px;
  --r-sm: 5px;
  --r-lg: 14px;
  --r-xl: 20px;
  --shadow: 0 2px 16px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.7);
  --t: .18s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-0);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ─── NAVBAR ─────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: rgba(6,8,15,.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  gap: 20px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -.3px;
  white-space: nowrap;
}

.navbar-brand .logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--gradient);
  background-image: url('../img/convsta-logo.svg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  line-height: 0;
}

.navbar-search {
  flex: 1;
  max-width: 400px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 0 12px 0 10px;
  transition: var(--t);
}

.navbar-search:focus-within { border-color: var(--blue); background: var(--bg-1); }

.navbar-search svg {
  color: var(--text-3);
  flex-shrink: 0;
  pointer-events: none;
}

.navbar-search input {
  flex: 1;
  height: 34px;
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-1);
  font-family: var(--font);
  font-size: 13px;
  outline: none;
}

.navbar-search input::placeholder { color: var(--text-3); }

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  padding: 5px 12px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: var(--t);
  cursor: pointer;
}

.nav-link:hover { color: var(--text-1); background: var(--bg-hover); }
.nav-link.active { color: var(--text-1); background: var(--bg-3); }

/* ─── TOOL NAV (inside tools) ────────────────────── */
.tool-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  height: 56px;
  background: rgba(6,8,15,.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.tool-nav .back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: 13px;
  transition: var(--t);
  cursor: pointer;
  border: 1px solid transparent;
}

.tool-nav .back-btn:hover {
  color: var(--text-1);
  background: var(--bg-2);
  border-color: var(--border);
}

.tool-nav .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-right: auto;
}

.tool-nav .logo-icon {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  flex-shrink: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-3);
}

.breadcrumb span { color: var(--text-2); }

/* ─── HERO ───────────────────────────────────────── */
.hero {
  padding: 72px 24px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(91,140,247,.12) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(157,113,245,.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(91,140,247,.12);
  border: 1px solid rgba(91,140,247,.25);
  color: var(--blue);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .5px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 16px;
  color: var(--text-2);
  max-width: 480px;
  margin: 0 auto 40px;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 520px;
  margin: 0 auto;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  padding: 0 20px 0 16px;
  transition: var(--t);
}

.search-bar:focus-within {
  border-color: var(--blue);
  background: var(--bg-1);
  box-shadow: 0 0 0 3px rgba(91,140,247,.15);
}

.search-bar svg {
  color: var(--text-3);
  flex-shrink: 0;
}

.search-bar input {
  flex: 1;
  height: 50px;
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-1);
  font-family: var(--font);
  font-size: 15px;
  outline: none;
}

.search-bar input::placeholder { color: var(--text-3); }

.search-hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-3);
}

/* ─── MAIN LAYOUT ────────────────────────────────── */
.main {
  flex: 1;
  min-width: 0;
  padding: 0 24px 80px;
}

/* ─── CATEGORIES ─────────────────────────────────── */
.categories {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.cat-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--t);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  letter-spacing: .2px;
}

.cat-btn:hover { border-color: var(--border-strong); color: var(--text-1); background: var(--bg-2); }

.cat-btn.active {
  background: var(--bg-3);
  border-color: var(--border-strong);
  color: var(--text-1);
}

.cat-btn .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

/* ─── SECTION ────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .8px;
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ─── TOOL GRID ──────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  cursor: pointer;
  transition: var(--t);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: var(--t);
}

.tool-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.tool-card:hover::before { opacity: 1; }

.tool-card-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.tool-card-body { flex: 1; }

.tool-card-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-1);
}

.tool-card-desc {
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.5;
}

.tool-card-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  width: fit-content;
}

.tool-card-arrow {
  position: absolute;
  top: 18px;
  right: 18px;
  color: var(--text-3);
  opacity: 0;
  transition: var(--t);
  transform: translateX(-4px);
}

.tool-card:hover .tool-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ─── TOOL PAGE ──────────────────────────────────── */
.tool-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.tool-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.tool-header-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--r-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.tool-header-info h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.4px;
  margin-bottom: 4px;
}

.tool-header-info p {
  font-size: 14px;
  color: var(--text-2);
}

/* ─── PANELS ─────────────────────────────────────── */
.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.panel-grid.single { grid-template-columns: 1fr; }

@media (max-width: 768px) { .panel-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}

.panel-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: .6px;
}

.panel-actions { display: flex; gap: 6px; align-items: center; }

.panel-body { padding: 16px; }

/* ─── INPUTS & TEXTAREAS ─────────────────────────── */
textarea, input[type="text"], input[type="number"], input[type="url"], input[type="email"], select {
  width: 100%;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text-1);
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 12px;
  outline: none;
  transition: var(--t);
  resize: vertical;
}

input[type="text"], input[type="number"], input[type="url"], input[type="email"] { resize: none; }

textarea:focus, input[type="text"]:focus, input[type="number"]:focus, input[type="url"]:focus, select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(91,140,247,.15);
}

textarea::placeholder, input::placeholder { color: var(--text-3); }

select {
  font-family: var(--font);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235a6382' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.code-area {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  min-height: 200px;
  background: var(--bg-0);
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px;
  resize: vertical;
  width: 100%;
  outline: none;
  transition: var(--t);
}

.code-area:focus { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(91,140,247,.15); }

/* ─── BUTTONS ────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--r-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--t);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: white;
}

.btn-primary:hover { opacity: .88; transform: translateY(-1px); }

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

.btn-secondary:hover { background: var(--bg-3); border-color: var(--border-strong); color: var(--text-1); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
}

.btn-ghost:hover { background: var(--bg-2); color: var(--text-1); }

.btn-danger {
  background: rgba(247,96,91,.12);
  border-color: rgba(247,96,91,.25);
  color: var(--red);
}

.btn-danger:hover { background: rgba(247,96,91,.2); }

.btn-sm { padding: 4px 10px; font-size: 12px; border-radius: var(--r-sm); }
.btn-lg { padding: 10px 22px; font-size: 14px; }
.btn-icon { width: 30px; height: 30px; padding: 0; justify-content: center; }

/* ─── CONTROLS ROW ───────────────────────────────── */
.controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
}

.toggle-group {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
}

.toggle-btn {
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--t);
  background: transparent;
  color: var(--text-2);
  border: none;
  font-family: var(--font);
}

.toggle-btn:hover { background: var(--bg-2); color: var(--text-1); }
.toggle-btn.active { background: var(--bg-3); color: var(--text-1); }

/* ─── BADGES & TAGS ──────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2px;
}

.badge-blue { background: rgba(91,140,247,.15); color: var(--blue); border: 1px solid rgba(91,140,247,.2); }
.badge-purple { background: rgba(157,113,245,.15); color: var(--purple); border: 1px solid rgba(157,113,245,.2); }
.badge-green { background: rgba(62,207,142,.15); color: var(--green); border: 1px solid rgba(62,207,142,.2); }
.badge-orange { background: rgba(249,115,22,.15); color: var(--orange); border: 1px solid rgba(249,115,22,.2); }
.badge-red { background: rgba(247,96,91,.15); color: var(--red); border: 1px solid rgba(247,96,91,.2); }
.badge-cyan { background: rgba(34,211,238,.15); color: var(--cyan); border: 1px solid rgba(34,211,238,.2); }

/* ─── ALERTS / STATUS ────────────────────────────── */
.alert {
  padding: 10px 14px;
  border-radius: var(--r);
  font-size: 13px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.alert-success { background: rgba(62,207,142,.1); border: 1px solid rgba(62,207,142,.2); color: var(--green); }
.alert-error { background: rgba(247,96,91,.1); border: 1px solid rgba(247,96,91,.2); color: var(--red); }
.alert-info { background: rgba(91,140,247,.1); border: 1px solid rgba(91,140,247,.2); color: var(--blue); }
.alert-warn { background: rgba(251,191,36,.1); border: 1px solid rgba(251,191,36,.2); color: var(--yellow); }

/* ─── STATS GRID ─────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}

.stat-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 12px 14px;
  text-align: center;
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.5px;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label { font-size: 11px; color: var(--text-3); margin-top: 2px; text-transform: uppercase; letter-spacing: .5px; }

/* ─── RESULT DISPLAY ─────────────────────────────── */
.result-box {
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  word-break: break-all;
  min-height: 40px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.result-row:last-child { border-bottom: none; }

.result-label { font-size: 12px; color: var(--text-3); font-weight: 500; flex-shrink: 0; }
.result-value { font-family: var(--mono); font-size: 12.5px; color: var(--text-1); word-break: break-all; }

/* ─── CHECKBOX & RADIO ───────────────────────────── */
.check-group {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-2);
}

.check-group input { width: 14px; height: 14px; accent-color: var(--blue); cursor: pointer; }
.check-group:hover { color: var(--text-1); }

/* ─── RANGE SLIDER ───────────────────────────────── */
input[type="range"] {
  accent-color: var(--blue);
  height: 4px;
  cursor: pointer;
  background: transparent;
}

/* ─── COLOR SWATCH ───────────────────────────────── */
.color-swatch {
  width: 100%;
  height: 80px;
  border-radius: var(--r);
  border: 1px solid var(--border);
  transition: var(--t);
}

/* ─── QR OUTPUT ──────────────────────────────────── */
#qr-output {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: white;
  border-radius: var(--r-lg);
  min-height: 200px;
}

/* ─── DIFF VIEW ──────────────────────────────────── */
.diff-line {
  display: flex;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
}

.diff-line.added { background: rgba(62,207,142,.1); }
.diff-line.removed { background: rgba(247,96,91,.1); }
.diff-line.unchanged { color: var(--text-2); }

.diff-gutter {
  width: 36px;
  flex-shrink: 0;
  text-align: right;
  padding-right: 10px;
  color: var(--text-3);
  font-size: 11px;
  border-right: 1px solid var(--border);
  margin-right: 12px;
  user-select: none;
}

.diff-sign {
  width: 14px;
  flex-shrink: 0;
  font-weight: 600;
}

.diff-line.added .diff-sign { color: var(--green); }
.diff-line.removed .diff-sign { color: var(--red); }

/* ─── JWT SECTIONS ───────────────────────────────── */
.jwt-section {
  border-radius: var(--r);
  padding: 12px 14px;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  word-break: break-all;
}

.jwt-header { background: rgba(249,115,22,.08); border: 1px solid rgba(249,115,22,.2); }
.jwt-payload { background: rgba(157,113,245,.08); border: 1px solid rgba(157,113,245,.2); }
.jwt-signature { background: rgba(62,207,142,.08); border: 1px solid rgba(62,207,142,.2); }

.jwt-section-title {
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 8px;
}

.jwt-header .jwt-section-title { color: var(--orange); }
.jwt-payload .jwt-section-title { color: var(--purple); }
.jwt-signature .jwt-section-title { color: var(--green); }

/* ─── MATCH HIGHLIGHT ────────────────────────────── */
mark.match {
  background: rgba(251,191,36,.3);
  color: var(--yellow);
  border-radius: 2px;
  padding: 0 1px;
}

/* ─── STRENGTH BAR ───────────────────────────────── */
.strength-bar {
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  overflow: hidden;
  margin-top: 6px;
}

.strength-fill {
  height: 100%;
  border-radius: 2px;
  transition: width .3s ease, background .3s ease;
}

/* ─── AD BANNERS ─────────────────────────────────── */
.ad-banner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-1);
}
.ad-banner-top  { border-bottom: 1px solid var(--border); }
.ad-banner-bottom { border-top: 1px solid var(--border); margin-top: 8px; }
.ad-leaderboard {
  width: 728px;
  max-width: 100%;
  height: 90px;
  background: var(--bg-2);
  border: 1px dashed var(--border);
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: .4px;
}

/* ─── FOOTER ─────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
}

.site-footer a { color: var(--blue); }
.site-footer a:hover { text-decoration: underline; }

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

/* ─── UTIL ───────────────────────────────────────── */
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.w-full { width: 100%; }
.font-mono { font-family: var(--mono); }
.text-sm { font-size: 12px; }
.text-muted { color: var(--text-3); }
.text-secondary { color: var(--text-2); }
.hidden { display: none !important; }
.overflow-auto { overflow: auto; }

/* ─── COPY TOAST ─────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--bg-3);
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  z-index: 9999;
  white-space: nowrap;
  box-shadow: var(--shadow);
}

#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ─── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 640px) {
  .hero { padding: 48px 16px 40px; }
  .hero h1 { font-size: 28px; }
  .main { padding: 0 16px 60px; }
  .navbar { padding: 0 16px; }
  .tools-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 400px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ─── MOBILE BOTTOM AD ROW ───────────────────────── */
.mobile-ad-row {
  display: none;
  width: 100%;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.ad-mobile-slot {
  max-width: 380px;
  margin: 0 auto;
  padding: 16px 0 24px;
  text-align: center;
}
.ad-mobile-slot span {
  display: block;
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: .4px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
@media (max-width: 768px) {
  .mobile-ad-row { display: block; }
}

/* ─── ICON COLORS ────────────────────────────────── */
.icon-blue { background: rgba(91,140,247,.12); }
.icon-purple { background: rgba(157,113,245,.12); }
.icon-green { background: rgba(62,207,142,.12); }
.icon-orange { background: rgba(249,115,22,.12); }
.icon-red { background: rgba(247,96,91,.12); }
.icon-cyan { background: rgba(34,211,238,.12); }
.icon-yellow { background: rgba(251,191,36,.12); }