:root {
  --bg: #0b1220;
  --surface: #121a2b;
  --border: #1f2a44;
  --text: #e8eefc;
  --muted: #8b9bb8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

.header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo span { color: var(--accent); }

.nav { display: flex; gap: 1.5rem; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav a:hover { color: var(--text); }

.btn {
  border: none;
  border-radius: 10px;
  padding: 0.65rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-sm { padding: 0.5rem 0.9rem; font-size: 0.85rem; display: inline-block; }
.btn-block { width: 100%; margin-top: 0.5rem; }

.hero { padding: 4rem 0 3rem; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
}

.badge {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent);
  background: rgba(59, 130, 246, 0.12);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.hero h1 { font-size: clamp(2rem, 4vw, 2.75rem); line-height: 1.15; margin-bottom: 1rem; }
.lead { color: var(--muted); max-width: 32rem; margin-bottom: 1.5rem; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 2rem; }

.stats { list-style: none; display: flex; gap: 2rem; flex-wrap: wrap; }
.stats strong { display: block; font-size: 1.25rem; }
.stats span { color: var(--muted); font-size: 0.85rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.upload-card h2 { font-size: 1.2rem; margin-bottom: 0.25rem; }
.muted { color: var(--muted); font-size: 0.9rem; margin-bottom: 1rem; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--muted);
}

.dropzone svg { color: var(--accent); margin-bottom: 0.75rem; }
.dropzone p { margin-bottom: 1rem; }

.login-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

.login-form input {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.form-note { font-size: 0.8rem; color: var(--muted); margin-top: 0.75rem; }

.features { padding: 3rem 0 4rem; border-top: 1px solid var(--border); }
.features h2 { text-align: center; margin-bottom: 2rem; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.feature-grid article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature-grid h3 { margin-bottom: 0.5rem; font-size: 1.05rem; }
.feature-grid p { color: var(--muted); font-size: 0.92rem; }

.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); }