/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --accent: #4f46e5;        /* indigo */
  --accent-glow: #6366f1;
  --text: #1e293b;          /* slate-800 */
  --muted: #64748b;         /* slate-500 */
  --border: #e2e8f0;        /* slate-200 */
  --bg: #f8fafc;            /* slate-50 */
  --card-bg: #ffffff;       /* white */
  --radius: 12px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
}

html {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  /* subtle warm gradient */
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(79, 70, 229, 0.05) 0%, transparent 55%),
    radial-gradient(ellipse at 50% 100%, rgba(139, 92, 246, 0.04) 0%, transparent 60%);
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: underline;
}

a:hover {
  opacity: 0.8;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 4rem;
  max-width: 700px;
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.lede {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

/* How it works */
.how-it-works {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}

.how-it-works h2 {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
  color: var(--text);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
}

.card-number {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.card p {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.55;
}

/* Flowchart */
.flow-section {
  margin-top: 3.5rem;
  text-align: center;
}

.flow-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
}

.flowchart {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.flow-node {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 1.75rem;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.4;
  min-width: 260px;
  text-align: left;
}

.flow-node--start {
  border-color: var(--accent);
  border-width: 2px;
  box-shadow: 0 0 12px rgba(79, 70, 229, 0.15);
}

.flow-node--end {
  border-color: var(--accent);
  border-width: 2px;
  background: color-mix(in srgb, var(--accent) 8%, var(--card-bg));
  box-shadow: 0 0 16px rgba(79, 70, 229, 0.18);
}

.flow-node--decision {
  background: color-mix(in srgb, var(--accent) 6%, var(--card-bg));
  border-style: dashed;
}

.flow-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.flow-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  line-height: 1;
  padding: 0.15rem 0;
  opacity: 0.6;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.875rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}