/* ============================================================
   silentos.net — single dark engineered theme.
   Single-theme is deliberate: the page commits to its world.
   No external resources of any kind. System font stacks only.
   ============================================================ */

:root {
  /* ground: near-black with a slight purple bias, never pure black */
  --bg:        #0a070f;
  --bg-raise:  #100b18;
  --bg-sink:   #070510;

  --ink:       #e9e5f0;
  --ink-mid:   #a79ebb;
  --ink-dim:   #6f6683;

  --accent:    #b45cf6;
  --accent-dim:#7b3fab;

  --rule:      #221a30;
  --rule-lit:  #3a2b52;

  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
          "Liberation Mono", "DejaVu Sans Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
          Arial, "Noto Sans", sans-serif;

  --measure: 62ch;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(120ch 60ch at 12% -10%, rgba(180, 92, 246, .085), transparent 65%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1rem, .96rem + .2vw, 1.075rem);
  line-height: 1.62;
  letter-spacing: .002em;
  -webkit-font-smoothing: antialiased;
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: 68rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 46rem; }

.section {
  padding-block: clamp(3.5rem, 9vw, 7rem);
  border-top: 1px solid var(--rule);
}

/* ---------- type primitives ---------- */

h1, h2, h3 { line-height: 1.16; letter-spacing: -.015em; margin: 0; text-wrap: balance; }

h2 {
  font-size: clamp(1.65rem, 1.15rem + 2vw, 2.5rem);
  font-weight: 600;
  margin-block: .35rem .9rem;
}

p { margin: 0 0 1rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 .35rem;
}

.lede {
  color: var(--ink-mid);
  max-width: var(--measure);
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- links & focus ---------- */

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}
a:hover { color: #cf90ff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10;
  font-family: var(--mono);
  font-size: .8rem;
  background: var(--accent);
  color: #0a070f;
  padding: .6rem 1rem;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---------- 1. hero ---------- */

.hero {
  padding-block: clamp(3rem, 10vw, 7.5rem) clamp(3.5rem, 9vw, 6.5rem);
}

.hero__id {
  display: flex;
  align-items: center;
  gap: .9rem;
  margin-bottom: clamp(1.75rem, 5vw, 2.75rem);
}

/* the one controlled-glow moment on the page */
.mark {
  display: inline-flex;
  color: var(--accent);
  filter: drop-shadow(0 0 10px rgba(180, 92, 246, .38));
}
.mark svg { display: block; width: 2.35rem; height: 2.35rem; }

.hero__id .eyebrow { margin: 0; color: var(--ink-dim); }

.hero__name {
  font-size: clamp(2.4rem, 1.2rem + 5.6vw, 4.75rem);
  font-weight: 600;
  letter-spacing: -.03em;
}

.hero__role {
  font-family: var(--mono);
  font-size: clamp(.78rem, .72rem + .3vw, .9rem);
  letter-spacing: .06em;
  color: var(--ink-dim);
  margin-block: .7rem clamp(2rem, 5vw, 3rem);
}

.spine {
  font-size: clamp(1.12rem, 1rem + .75vw, 1.5rem);
  line-height: 1.5;
  max-width: 46ch;
  color: var(--ink-mid);
  border-left: 2px solid var(--accent);
  padding-left: clamp(1rem, 3vw, 1.75rem);
  margin-bottom: 2rem;
}
.spine strong { color: var(--ink); font-weight: 600; }

.hero__nav {
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin: 0;
}
.hero__nav a { text-decoration: none; border-bottom: 1px solid var(--accent-dim); padding-bottom: .2rem; }
.hero__nav a::after { content: " \2192"; }

/* ---------- 2. pillars ---------- */

.pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  grid-template-columns: 1fr;
}
@media (min-width: 46rem) {
  .pillars { grid-template-columns: 1fr 1fr; }
}

.pillar {
  background: var(--bg-raise);
  padding: clamp(1.4rem, 3.5vw, 2.1rem);
  transition: background 160ms linear, box-shadow 160ms linear;
}
.pillar:hover {
  background: #140e1e;
  box-shadow: inset 2px 0 0 var(--accent);
}

.pillar__n {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--accent-dim);
  margin: 0 0 .8rem;
}
.pillar__h {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: .55rem;
}
.pillar__b {
  color: var(--ink-mid);
  font-size: .965rem;
  margin: 0;
  max-width: 46ch;
}

/* ---------- 3. project cards ---------- */

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(.9rem, 2vw, 1.15rem);
  grid-template-columns: 1fr;
}
@media (min-width: 52rem) {
  .cards { grid-template-columns: 1fr 1fr; }
  .cards > li:last-child { grid-column: 1 / -1; }
}

.card {
  height: 100%;
  background: var(--bg-sink);
  border: 1px solid var(--rule);
  padding: clamp(1.35rem, 3.5vw, 1.9rem);
  transition: border-color 160ms linear;
}
.card:hover { border-color: var(--rule-lit); }

.card__h {
  font-family: var(--mono);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--accent);
  margin-bottom: .6rem;
}
.card__b {
  color: var(--ink-mid);
  font-size: .965rem;
  margin: 0;
  max-width: 56ch;
}

.card--anam {
  border-color: var(--rule-lit);
  border-left: 2px solid var(--accent-dim);
}
.card--anam .card__b { color: var(--ink); }

/* ---------- 4. contact ---------- */

/* Keep the contact section on the SAME left rail as every other section —
   constrain the measure, don't re-center the column. */
.section--contact .wrap--narrow { max-width: 68rem; }
.section--contact .wrap--narrow > * { max-width: 42rem; }

.form { margin-top: .5rem; }

.field { margin-bottom: 1.15rem; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: .45rem;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--bg-sink);
  border: 1px solid var(--rule-lit);
  border-radius: 2px;
  padding: .7rem .8rem;
  transition: border-color 140ms linear, box-shadow 140ms linear;
}
textarea { resize: vertical; min-height: 8rem; }

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 14px rgba(180, 92, 246, .22);
  outline: none;
}

/* honeypot — off-screen, never focusable, never announced */
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.btn {
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #0a070f;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: .75rem 1.6rem;
  cursor: pointer;
  transition: background 140ms linear, box-shadow 140ms linear;
}
.btn:hover {
  background: #c880ff;
  box-shadow: 0 0 18px rgba(180, 92, 246, .35);
}
.btn[disabled] { opacity: .55; cursor: progress; }

.form__status {
  font-family: var(--mono);
  font-size: .82rem;
  margin: 1rem 0 0;
  min-height: 1.4em;
  color: var(--ink-mid);
}
.form__status[data-state="ok"]  { color: var(--accent); }
.form__status[data-state="err"] { color: #ff8f8f; }

/* ---------- footer ---------- */

.foot {
  border-top: 1px solid var(--rule);
  padding-block: clamp(2.5rem, 6vw, 4rem);
  color: var(--ink-dim);
}
.foot .eyebrow { color: var(--ink-dim); }
.foot__b { font-family: var(--mono); font-size: .78rem; margin: .4rem 0 0; }

/* ---------- thanks page ---------- */

.thanks {
  min-height: 100svh;
  display: flex;
  align-items: center;
}
.thanks h1 {
  font-size: clamp(1.8rem, 1.2rem + 3vw, 3rem);
  font-weight: 600;
  margin-block: .4rem 1rem;
}
.thanks p { color: var(--ink-mid); max-width: 44ch; }

/* ---------- motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}