/* Resilient Tech — minimal, calm, systems-first */

:root{
  --bg: #f8fafc;
  --fg: #0b1220;
  --muted: #475569;
  --muted-2: #64748b;
  --border: #e2e8f0;
  --panel: #ffffff;

  --accent: #2563eb;
  --accent-2: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --accent-soft-2: rgba(37, 99, 235, 0.12);
  --accent-border: rgba(37, 99, 235, 0.28);
  --accent-border-strong: rgba(37, 99, 235, 0.55);
  --focus-ring: rgba(96, 165, 250, 0.70);

  --header-bg: rgba(248, 250, 252, 0.86);
  --hero-glow: rgba(37, 99, 235, 0.10);

  --input-bg: rgba(255, 255, 255, 0.78);

  --radius: 12px;
  --radius-sm: 10px;

  --max: 1100px;
  --gutter: clamp(1.1rem, 3vw, 1.75rem);
  --section-pad: clamp(3.25rem, 6vw, 4.75rem);
  --header-h: 72px;

  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --shadow-soft: 0 8px 24px rgba(2, 6, 23, 0.05);
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg: #0b1220;
    --fg: #e5e7eb;
    --muted: #94a3b8;
    --muted-2: #cbd5e1;
    --border: #1f2937;
    --panel: #0f172a;

    --accent: #60a5fa;
    --accent-2: #93c5fd;
    --accent-soft: rgba(96, 165, 250, 0.08);
    --accent-soft-2: rgba(96, 165, 250, 0.14);
    --accent-border: rgba(96, 165, 250, 0.32);
    --accent-border-strong: rgba(96, 165, 250, 0.62);
    --focus-ring: rgba(147, 197, 253, 0.72);

    --header-bg: rgba(11, 18, 32, 0.86);
    --hero-glow: rgba(96, 165, 250, 0.16);

    --input-bg: rgba(15, 23, 42, 0.82);

    --shadow-soft: 0 10px 28px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"]{
  --bg: #0b1220;
  --fg: #e5e7eb;
  --muted: #94a3b8;
  --muted-2: #cbd5e1;
  --border: #1f2937;
  --panel: #0f172a;

  --accent: #60a5fa;
  --accent-2: #93c5fd;
  --accent-soft: rgba(96, 165, 250, 0.08);
  --accent-soft-2: rgba(96, 165, 250, 0.14);
  --accent-border: rgba(96, 165, 250, 0.32);
  --accent-border-strong: rgba(96, 165, 250, 0.62);
  --focus-ring: rgba(147, 197, 253, 0.72);

  --header-bg: rgba(11, 18, 32, 0.86);
  --hero-glow: rgba(96, 165, 250, 0.16);

  --input-bg: rgba(15, 23, 42, 0.82);

  --shadow-soft: 0 10px 28px rgba(0, 0, 0, 0.35);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ transition: none !important; animation: none !important; }
}
body{
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a{
  color: inherit;
  text-decoration-color: var(--accent-border);
  text-underline-offset: 0.2em;
}
a:hover{ text-decoration-color: var(--accent); }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible{
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 8px;
}

.skip-link{
  position: absolute;
  left: -999px;
  top: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  z-index: 100;
}
.skip-link:focus{ left: 0.75rem; }

.container{
  width: 100%;
  max-width: var(--max);
  padding: 0 var(--gutter);
  margin: 0 auto;
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.06);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1.2rem;
}
.brand{
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}
.brand-mark{
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.85rem;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-soft-2));
  border: 1px solid var(--accent-border);
  box-shadow: 0 8px 18px rgba(2, 6, 23, 0.10);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-name{
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-nav{
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}
.site-nav a{
  text-decoration: none;
  color: var(--muted);
  font-size: 1rem;
  padding: 0.45rem 0.25rem;
}
.site-nav a:hover{ color: var(--fg); }
.site-nav .nav-cta{
  color: var(--fg);
  border: 1px solid var(--accent-border);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
}
.site-nav .nav-cta:hover{
  border-color: var(--accent-border-strong);
}

.theme-toggle{
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  cursor: pointer;
}
.theme-toggle:hover{
  border-color: var(--accent-border);
}
.theme-toggle svg{ width: 1.05rem; height: 1.05rem; }

main{ display: block; }
section{ scroll-margin-top: calc(var(--header-h) + 24px); }

.hero{
  padding: calc(var(--section-pad) * 0.9) 0 var(--section-pad);
  background:
    radial-gradient(900px circle at 12% 0%, var(--hero-glow), transparent 60%),
    radial-gradient(700px circle at 85% 20%, var(--accent-soft-2), transparent 65%);
  border-bottom: 1px solid var(--border);
}
.hero h1{
  font-family: var(--font-serif);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  margin: 0 0 0.7rem 0;
}
.hero .lede{
  margin: 0 0 1.3rem 0;
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 62ch;
}
.hero .sublede{
  margin: 0 0 1.7rem 0;
  color: var(--muted);
  max-width: 70ch;
}
.hero-actions{
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: center;
}
.button{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--accent-border-strong);
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.button:hover{ background: var(--accent-2); }
.button.secondary{
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.button.secondary:hover{
  border-color: var(--accent-border);
  background: var(--accent-soft);
}
.micro{
  margin-top: 1.2rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.tag{
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.25);
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
}
:root[data-theme="dark"] .tag{ background: rgba(255, 255, 255, 0.04); }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .tag{ background: rgba(255, 255, 255, 0.04); }
}
.tag .dot{
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
}

.section{
  padding: var(--section-pad) 0;
  border-bottom: 1px solid var(--border);
}
.section:last-of-type{ border-bottom: 0; }

.kicker{
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 0.5rem 0;
}
.section h2{
  font-family: var(--font-serif);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  margin: 0 0 0.85rem 0;
}
.section p{
  margin: 0 0 1rem 0;
  max-width: 75ch;
  color: var(--muted);
}

.grid{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1rem;
}
.card{
  grid-column: span 12;
  padding: 1.1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
@media (min-width: 760px){
  .card.half{ grid-column: span 6; }
  .card.third{ grid-column: span 4; }
}

.card h3{
  margin: 0 0 0.5rem 0;
  font-size: 1.05rem;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.card p{ margin: 0 0 0.8rem 0; color: var(--muted); }
.card ul{
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}
.card li{ margin: 0.25rem 0; }

.split{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 900px){
  .split{ grid-template-columns: 1.1fr 0.9fr; gap: 1.5rem; align-items: start; }
}

.principles{
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}
.principles li{ margin: 0.35rem 0; }

.steps{
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}
.steps li{ margin: 0.5rem 0; }

.notice{
  border-radius: var(--radius);
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  padding: 0.9rem 1rem;
  color: var(--muted);
}

.form{
  display: grid;
  gap: 0.9rem;
  margin-top: 0.8rem;
}
.field{
  display: grid;
  gap: 0.35rem;
}
label{
  font-size: 0.95rem;
  color: var(--fg);
  font-weight: 600;
}
input[type="text"], input[type="email"], textarea{
  width: 100%;
  padding: 0.75rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--fg);
  font: inherit;
}
textarea{ min-height: 170px; resize: vertical; }

.help{
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0;
}
.form-actions{
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}
.form .button{ border: 0; cursor: pointer; }
.form .button:focus-visible{ outline-offset: 4px; }

.honeypot{
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

.pgp{
  margin-top: 1rem;
}
.pgp-summary{
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  font-weight: 600;
}
.pgp-summary::-webkit-details-marker{ display: none; }
.pgp-summary::after{
  content: "+";
  font-weight: 700;
}
.pgp[open] .pgp-summary::after{
  content: "-";
}
.pgp-body{
  margin-top: 0.75rem;
}
.pgp pre{
  margin: 0.6rem 0 0 0;
  padding: 0.9rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--input-bg);
  overflow: auto;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
}
.pgp-meta{
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  align-items: center;
}
.pgp-meta .mini{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
}
.copy-btn{
  appearance: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--fg);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  font-weight: 600;
}
.copy-btn:hover{
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

.site-footer{
  padding: 1.6rem 0 2.4rem;
  border-top: 1px solid var(--border);
}
.footer-inner{
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.footer-privacy{
  margin: 0;
  color: var(--muted);
  max-width: 85ch;
}
.footer-meta{
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.sr-only{
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}