:root {
  --bg: #0b1020;
  --bg-elev: #121a31;
  --bg-soft: #182241;
  --card: rgba(255,255,255,0.06);
  --card-border: rgba(255,255,255,0.10);
  --text: #eef2ff;
  --muted: #a8b3cf;
  --accent: #7c9cff;
  --accent-2: #56e0c5;
  --danger: #ff7a9e;
  --warning: #f4c96b;
  --success: #6ee7a8;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --radius-sm: 12px;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(124,156,255,0.15), transparent 28%),
    radial-gradient(circle at top right, rgba(86,224,197,0.10), transparent 22%),
    linear-gradient(180deg, #08101f 0%, var(--bg) 100%);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea {
  font: inherit;
}
button {
  cursor: pointer;
  border: 0;
}

.container {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(8, 16, 31, 0.72);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #08101f;
  font-weight: 900;
  box-shadow: var(--shadow);
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-link {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid transparent;
  transition: 150ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  border-color: rgba(255,255,255,0.1);
  background: rgba(124,156,255,0.12);
}

.hero {
  padding: 48px 0 28px;
}

.hero-grid {
  display: grid;
  gap: 22px;
  align-items: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(124,156,255,0.12);
  color: #dce4ff;
  border: 1px solid rgba(124,156,255,0.18);
  font-size: 0.92rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.05;
  margin: 16px 0 14px;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 760px;
  line-height: 1.65;
}

.page-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 30px 0 10px;
}

.page-title h1 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  margin: 0;
}

.page-subtitle {
  margin: 0 0 26px;
  color: var(--muted);
  max-width: 860px;
  line-height: 1.65;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  padding-bottom: 36px;
}

.card, .panel {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card-icon {
  font-size: 1.6rem;
}

.card h2, .panel h2, .panel h3 {
  margin: 0;
}

.card p,
.muted,
.helper,
small,
label small {
  color: var(--muted);
}

.card-action {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(124,156,255,0.95), rgba(86,224,197,0.9));
  color: #08101f;
  font-weight: 700;
}

.main-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 360px minmax(0, 1fr);
  align-items: start;
  padding-bottom: 40px;
}

.panel {
  padding: 20px;
}

.form-grid {
  display: grid;
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

label {
  font-weight: 600;
}

input[type="text"], input[type="number"], select, textarea {
  width: 100%;
  min-height: 46px;
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 12px 14px;
  outline: none;
}

select, option, optgroup {
  background: var(--bg-elev);
  color: var(--text);
}

select:focus, input:focus, textarea:focus {
  border-color: rgba(124,156,255,0.55);
  box-shadow: 0 0 0 3px rgba(124,156,255,0.14);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input[type="range"] {
  width: 100%;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  font-weight: 500;
}

.checkbox input {
  width: 18px;
  height: 18px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  min-height: 46px;
  padding: 0 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.07);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  font-weight: 700;
}

.btn.primary {
  background: linear-gradient(135deg, rgba(124,156,255,0.95), rgba(86,224,197,0.9));
  color: #08101f;
  border-color: transparent;
}

.btn.danger {
  background: rgba(255,122,158,0.12);
  color: #ffd5df;
  border-color: rgba(255,122,158,0.16);
}

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

.output-box {
  border-radius: 14px;
  background: rgba(7, 10, 18, 0.7);
  border: 1px solid rgba(255,255,255,0.09);
  padding: 16px;
  overflow: auto;
}

.output-line {
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.97rem;
  line-height: 1.65;
}

.output-line + .output-line {
  margin-top: 8px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.metric {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 700;
}

.badge.weak { background: rgba(255,122,158,0.16); color: #ffd5df; }
.badge.medium { background: rgba(244,201,107,0.16); color: #ffe4a5; }
.badge.strong { background: rgba(110,231,168,0.16); color: #d4ffe4; }
.badge.info { background: rgba(124,156,255,0.16); color: #dde6ff; }

.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.tab-btn {
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  color: var(--muted);
  border: 1px solid rgba(255,255,255,0.08);
  font-weight: 700;
}

.tab-btn.active {
  background: rgba(124,156,255,0.14);
  color: var(--text);
  border-color: rgba(124,156,255,0.22);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.hidden { display: none !important; }

.swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.swatch {
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}

.swatch-color {
  height: 110px;
}

.swatch-meta {
  padding: 12px;
  display: grid;
  gap: 6px;
}

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-all;
}

.footer-note {
  padding: 0 0 40px;
  color: var(--muted);
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: rgba(8, 16, 31, 0.96);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 12px 14px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  .checkbox-grid {
    grid-template-columns: 1fr;
  }
  .header-row {
    flex-direction: column;
    justify-content: center;
    padding: 14px 0;
  }
}