/* Page shell: content column, header, identity, footer.
   Mobile-first; gutters scale with the viewport. */

html, body { overflow-x: hidden; }

/* CRT vignette (dark mode only via --vignette) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 60%, var(--vignette) 100%);
  pointer-events: none;
  z-index: 9998;
}

.shell {
  position: relative;
  z-index: 1;
  width: min(100%, var(--shell-max));
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) clamp(1rem, 4vw, 3rem) 5rem;
  min-height: 100vh;
  background: var(--shell-bg);
}

/* ---------- Header ---------- */
.header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-control-border);
  padding-bottom: 1.5rem;
}

.header-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.prompt-line {
  color: var(--color-text-muted);
  font-size: var(--text-min);
  letter-spacing: 0.04em;
}
.prompt-line span { color: var(--color-accent); }

/* Header controls: always-visible row on wide screens; collapsed behind a
   [ display ] disclosure on phones. */
.controls { position: relative; }
.controls-menu { display: flex; flex-wrap: wrap; gap: 0.5rem; }
#controls-toggle { display: none; }

@media (max-width: 599px) {
  #controls-toggle { display: inline-block; }
  .controls-menu { display: none; }
  .controls.open .controls-menu {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    margin-top: 0.5rem;
  }
  .controls.open .controls-menu .ctrl-btn { text-align: left; }
}

@media (min-width: 768px) {
  .header-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    flex-wrap: wrap;
  }
}

.site-name {
  font-size: var(--text-title);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
  text-transform: uppercase;
  overflow-wrap: anywhere;
}

.tagline {
  color: var(--color-warning);
  font-size: var(--text-small);
  margin-top: 0.3rem;
  letter-spacing: 0.08em;
}

.subline {
  color: var(--color-text-muted);
  font-size: var(--text-min);
  margin-top: 0.4rem;
  letter-spacing: 0.05em;
  line-height: var(--leading-normal);
}
.subline a { color: var(--color-text-soft); text-decoration: none; }
.subline a:hover { color: var(--color-accent); }

/* Glitch effect (dark mode flourish; disabled for reduced motion) */
.glitch { position: relative; }
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 100%;
  opacity: 0;
}
.glitch::before {
  color: var(--color-danger);
  animation: glitch-1 3.5s infinite;
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}
.glitch::after {
  color: var(--color-text);
  animation: glitch-2 3.5s infinite;
  clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
}
[data-theme="light"] .glitch::before,
[data-theme="light"] .glitch::after { opacity: 0; animation: none; }

@keyframes glitch-1 {
  0%, 90%, 100% { transform: none; opacity: 0; }
  91% { transform: translate(-4px, 1px); opacity: 0.85; }
  93% { transform: translate(4px, -2px); opacity: 0.85; }
  95% { transform: translate(-2px, 3px); opacity: 0.7; }
  96% { transform: none; opacity: 0; }
}
@keyframes glitch-2 {
  0%, 90%, 100% { transform: none; opacity: 0; }
  90.5% { transform: translate(4px, -2px); opacity: 0.8; }
  92.5% { transform: translate(-4px, 2px); opacity: 0.85; }
  94.5% { transform: translate(3px, 1px); opacity: 0.7; }
  95.5% { transform: none; opacity: 0; }
}

/* Blink cursor */
.cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  background: var(--color-accent);
  vertical-align: text-bottom;
  animation: blink 1.1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  .glitch::before, .glitch::after { animation: none; opacity: 0; }
  .cursor { animation: none; }
}

/* ---------- Footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  color: var(--color-text-muted);
  font-size: var(--text-min);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
footer.site-footer a { color: var(--color-text-soft); text-decoration: none; }
footer.site-footer a:hover { color: var(--color-accent); }