/* Richard Craig Lissaman, professional personal site
   Calm, credible cybersecurity positioning */

:root {
  --bg: #f8fafc;
  --bg-elevated: #ffffff;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #e2e8f0;
  --accent: #0e7490;
  --accent-hover: #155e75;
  --accent-soft: #ecfeff;
  --danger-soft: #fef2f2;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.08);
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --max: 68rem;
  --space: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--text);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.logo span {
  display: block;
  font-weight: 500;
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0;
}

.nav-toggle {
  display: none;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.45rem 0.65rem;
  font: inherit;
  cursor: pointer;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent);
}

@media (max-width: 860px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
  }

  .nav a:last-child {
    border-bottom: 0;
  }
}

/* Hero & sections */
.hero {
  padding: clamp(2.5rem, 5vw, 4rem) 0 2rem;
}

.hero__grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 880px) {
  .hero__grid {
    grid-template-columns: 1.25fr 1fr;
    gap: 3rem;
  }
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.5rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
}

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 36em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.15rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

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

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

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

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.trust-strip strong {
  color: var(--text);
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.35rem 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card p:last-child {
  margin-bottom: 0;
}

.section {
  padding: 2.75rem 0;
}

.section--alt {
  background: linear-gradient(180deg, #f1f5f9 0%, var(--bg) 100%);
}

.section__head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section__head h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.section__head p {
  margin: 0;
  color: var(--text-muted);
}

.grid-3 {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-2 {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 720px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature h3 {
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
}

.feature p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
}

.pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  margin-bottom: 0.5rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.site-footer__grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.site-footer strong {
  color: var(--text);
}

.site-footer a {
  font-weight: 500;
}

/* Prose */
.prose {
  max-width: 44rem;
}

.prose h2 {
  margin-top: 2.25rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.prose h3 {
  margin-top: 1.75rem;
  font-size: 1.1rem;
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.prose li {
  margin: 0.35rem 0;
}

.page-hero {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.page-hero h1 {
  margin-bottom: 0.5rem;
}

.page-hero .lead {
  margin-bottom: 0;
}

.page-body {
  padding: 2rem 0 3rem;
}

.callout {
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  font-size: 0.98rem;
}

.callout--warn {
  border-left-color: #dc2626;
  background: var(--danger-soft);
}

.timeline {
  border-left: 2px solid var(--border);
  margin: 0;
  padding-left: 1.5rem;
}

.timeline__item {
  position: relative;
  padding-bottom: 1.75rem;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: -5px;
  border: 2px solid var(--bg-elevated);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__meta {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0 0 0.25rem;
}

.contact-form label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin: 1rem 0 0.35rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  max-width: 32rem;
  padding: 0.6rem 0.75rem;
  font: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.contact-form textarea {
  min-height: 8rem;
  resize: vertical;
}

.contact-form small {
  display: block;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-size: 0.85rem;
}

.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.blog-list li {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}

.blog-list a {
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.blog-list a:hover {
  color: var(--accent);
}

.blog-meta {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0.25rem 0 0;
}

table.cert-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

table.cert-table th,
table.cert-table td {
  border: 1px solid var(--border);
  padding: 0.65rem 0.85rem;
  text-align: left;
}

table.cert-table th {
  background: var(--bg-elevated);
  font-weight: 600;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: #e2e8f0;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

/* FAQ */
.faq {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.faq h2 {
  margin-top: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.6rem);
}

.faq-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-item {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: 0;
}

.faq-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.35;
  color: var(--text);
}

.faq-item p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.6;
}