:root {
  --bg: #0f172a;
  --surface: #101828;
  --card: #0f172a;
  --panel: #1d2939;
  --text: #f8fafc;
  --muted: #cbd5f5;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --border: #1f2a3d;
  --success: #34d399;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', 'Inter var', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(7, 12, 24, 0.85);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text);
}

.nav__links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav__links a {
  color: var(--muted);
  font-weight: 500;
}

.nav__links a.is-active,
.nav__links a:hover {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.65rem 1.6rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  color: #0f172a;
}

.btn--primary:hover {
  background: var(--accent-dark);
  color: #fff;
}

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

.hero {
  padding: 4rem 0 2rem;
}

.hero__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 3.25rem);
  margin: 0.5rem 0 1rem;
}

.hero__panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 25px 60px rgba(10, 10, 30, 0.45);
}

.hero__stats {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.hero__stats li {
  min-width: 120px;
}

.hero__stats strong {
  font-size: 1.75rem;
  display: block;
}

.section {
  padding: 3.5rem 0;
}

.section--alt {
  background: #0b1222;
}

.section__head {
  max-width: 720px;
  margin-bottom: 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
}

.tool-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 30px 60px rgba(8, 8, 16, 0.6);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 18px;
  padding: 1.5rem;
  text-align: center;
  background: #0b1221;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.dropzone.is-dragover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
}

.dropzone input {
  display: none;
}

.select-row,
.action-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 1.25rem;
}

select,
.format-input {
  flex: 1;
  min-width: 200px;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0b1221;
  color: var(--text);
  font-size: 1rem;
}

.status-chip {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.status-chip.success {
  color: var(--success);
}

.status-chip.error {
  color: #f87171;
}

.result-card {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.6);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.faq-card {
  background: #0b1221;
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 1.25rem;
}

.code-block {
  background: #020617;
  border-radius: 16px;
  border: 1px solid #1e293b;
  padding: 1rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
}

.list {
  padding-left: 1.1rem;
}

.step-list {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.step-list li {
  counter-increment: step;
  margin-bottom: 1rem;
  position: relative;
  padding-left: 2.75rem;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #0f172a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.cta {
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  padding: 2.5rem;
  border-radius: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-footer {
  padding: 2rem 0 3rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .nav__links {
    display: none;
  }

  .hero {
    padding-top: 3rem;
  }

  .cta {
    flex-direction: column;
    text-align: center;
  }
}