:root {
  color-scheme: light;
  --bg: #f0f9ff;
  --bg-alt: #e0f2fe;
  --text: #0c2a3d;
  --muted: #3d5a6e;
  --border: #bae6fd;
  --accent: #0369a1;
  --accent-hover: #075985;
  --accent-text: #ffffff;
  --card: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

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

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6em; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 3.5rem; }
.nav nav { display: flex; align-items: center; gap: 1.25rem; }
.nav nav a:not(.btn) { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav nav a:not(.btn):hover { color: var(--text); }
.brand { font-weight: 700; color: var(--text); text-decoration: none; }

/* Buttons */
.btn {
  display: inline-block; cursor: pointer;
  padding: 0.75rem 1.25rem; border-radius: 8px; border: 2px solid var(--accent);
  background: var(--accent); color: var(--accent-text);
  font: inherit; font-weight: 600; text-decoration: none;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-small { padding: 0.4rem 0.9rem; font-size: 0.9rem; }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--bg-alt); color: var(--accent-hover); }
.nav nav a.btn { color: var(--accent-text); }

/* Hero */
.hero { background: linear-gradient(180deg, #bae6fd 0%, var(--bg) 100%); padding: clamp(3rem, 9vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.eyebrow { color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.8rem; margin: 0 0 1rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 44rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.75rem; }

/* Sections */
.section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.section-alt { background: var(--bg-alt); }
.section-lead { color: var(--muted); max-width: 44rem; margin: 0 0 2rem; }

/* Cards */
.grid { display: grid; gap: 1rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 1.25rem;
}
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.card-cta { border-style: dashed; }

/* Leaks */
.leaks { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.leaks li { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; padding: 0.9rem 1rem; color: var(--muted); }
.leaks strong { color: var(--text); }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.5rem; max-width: 46rem; }
.steps li { display: flex; gap: 1rem; align-items: flex-start; }
.steps h3 { margin-bottom: 0.25rem; }
.steps p { margin: 0; color: var(--muted); }
.step-num {
  flex: none; width: 2.25rem; height: 2.25rem; border-radius: 50%;
  display: grid; place-items: center; font-weight: 700;
  background: var(--accent); color: var(--accent-text);
}

/* Principles */
.principles { margin-top: 2.5rem; max-width: 46rem; }
.principles ul { padding-left: 1.2rem; color: var(--muted); }
.principles li { margin-bottom: 0.5rem; }
.principles strong { color: var(--text); }

/* Contact */
.contact { display: grid; gap: 2rem; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
.form { display: grid; gap: 1rem; }
.form label { display: grid; gap: 0.35rem; font-weight: 600; font-size: 0.95rem; }
.form input, .form select, .form textarea {
  font: inherit; font-weight: 400; color: var(--text);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.65rem 0.75rem; width: 100%;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
.form .btn { justify-self: start; }
.form-note { margin: 0; min-height: 1.4em; color: var(--muted); font-size: 0.9rem; }

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

@media (max-width: 560px) {
  .nav nav a:not(.btn) { display: none; }
}