:root {
  color-scheme: light dark;
  font-family: 'Space Grotesk', 'Segoe UI', system-ui, sans-serif;
  line-height: 1.5;
  font-weight: 400;
  --bg: #0f172a;
  --card: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(148, 163, 184, 0.3);
  background-color: #020617;
  color: var(--text);
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.15), transparent 45%), var(--bg);
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-main {
  flex: 1;
  min-width: 0;
}

.container {
  width: min(1200px, 90vw);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
}

.branding {
  display: flex;
  flex-direction: column;
}

.nav-drawer {
  width: 270px;
  padding: 1.75rem 1.5rem;
  background: rgba(2, 6, 23, 0.92);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.nav-branding {
  margin-bottom: 2rem;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-list .nav-link {
  padding: 0.55rem 0.75rem;
  border-radius: 12px;
  font-size: 1rem;
  color: var(--text);
  background: rgba(15, 23, 42, 0.5);
}

.nav-list .nav-link:hover {
  background: rgba(56, 189, 248, 0.15);
}

.nav-list .nav-link.active {
  background: rgba(56, 189, 248, 0.25);
  color: var(--text);
}

.nav-toggle {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  cursor: pointer;
  display: none;
}

.nav-overlay {
  display: none;
}

.logo {
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: 0.06rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-link.active,
.nav-link:hover {
  color: var(--text);
}

.page-grid {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 2rem;
  padding: 2.5rem 0 3rem;
}

.content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.16), rgba(59, 130, 246, 0.08));
  border-radius: 24px;
  border: 1px solid var(--border);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2rem;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

p {
  color: var(--muted);
}

.primary-btn {
  margin-top: 1rem;
  border: none;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.primary-btn:hover {
  transform: translateY(-2px);
}

.primary-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.tool-form {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tool-input-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.tool-input {
  flex: 1 1 260px;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  font-size: 0.95rem;
}

.tool-input::placeholder {
  color: var(--muted);
}

.tool-textarea {
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  font-size: 0.95rem;
  resize: vertical;
  min-height: 140px;
}

.secondary-btn {
  background: rgba(148, 163, 184, 0.2);
  color: var(--text);
}

.secondary-btn:hover {
  transform: translateY(-2px);
}

.case-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.case-card .copy-btn {
  align-self: flex-start;
}

.case-results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tool-output {
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tool-range {
  flex: 1;
}

.range-value {
  min-width: 42px;
  text-align: center;
  font-weight: 600;
  color: var(--text);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
}

.tool-select {
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  padding: 0.6rem 0.85rem;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.meta-warnings {
  margin-top: 1rem;
}

.warning-list {
  margin: 0;
  padding-left: 1.2rem;
  color: #fecaca;
}

.ad-slot {
  border: 1px dashed var(--border);
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
  min-height: 150px;
}

.ad-frame--responsive {
  width: 100%;
}

.ad-slot.tall {
  min-height: 320px;
}

.fingerprint-card {
  background: var(--card);
  padding: 2rem;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.35);
}

.fingerprint-id {
  margin: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.fingerprint-id code {
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border-radius: 12px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
  word-break: break-all;
}

.label {
  text-transform: uppercase;
  letter-spacing: 0.2rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.data-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  background: rgba(15, 23, 42, 0.65);
}

.data-card h3 {
  margin-top: 0;
  font-size: 0.95rem;
}

.data-card p {
  margin: 0.35rem 0 0;
  color: var(--text);
  font-size: 0.95rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.muted {
  color: var(--muted);
}

.seo-copy {
  background: rgba(15, 23, 42, 0.7);
  border-radius: 24px;
  border: 1px solid var(--border);
  padding: 1.5rem 2rem;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: sticky;
  top: 90px;
  height: fit-content;
}

.tips {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.25rem;
  background: rgba(15, 23, 42, 0.8);
}

.tips ul {
  padding-left: 1.2rem;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-top: 2rem;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .nav-drawer {
    position: fixed;
    left: 0;
    top: 0;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 30;
  }

  .nav-open .nav-drawer {
    transform: translateX(0);
  }

  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.6);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 25;
  }

  .nav-open .nav-overlay {
    opacity: 1;
    pointer-events: auto;
  }

  .page-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 1024px) {
  .page-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

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

  nav {
    justify-content: flex-end;
  }
}