:root {
  color-scheme: dark;
  --scene-bg: #080b10;
  --scene-text: #e6edf3;
  --scene-border: #1f6f7a;
  --scene-selection: #17313b;
  --brand-primary: #25d9ff;
  --brand-secondary: #ff3b81;
  --brand-accent: #63e67b;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: #07090d; color: #edf3f7; }
button, input, select { font: inherit; }
button, input, select { border: 1px solid #36414a; border-radius: 10px; background: #111820; color: #edf3f7; padding: .7rem .8rem; }
button { cursor: pointer; }
button:hover { border-color: var(--brand-primary); }
input[type="color"] { padding: .2rem; width: 3rem; height: 2.5rem; }
input[type="range"] { padding: 0; }
a { color: var(--brand-primary); }

.site-header, main, footer { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
.site-header { display: flex; align-items: end; justify-content: space-between; gap: 2rem; padding: 3rem 0 2rem; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: .4rem; font-size: clamp(2rem, 7vw, 4.8rem); line-height: .95; }
h2 { margin-bottom: .4rem; }
.eyebrow { color: var(--brand-secondary); font: 700 .78rem/1 ui-monospace, monospace; letter-spacing: .18em; }

.controls, .screensaver, .export-panel { border-top: 1px solid #26303a; padding: 1.5rem 0; }
.section-heading, .screensaver, .export-panel { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
#status { max-width: 36rem; color: #b7c3cc; text-align: right; }
#status[data-tone="success"] { color: var(--brand-accent); }
#status[data-tone="error"] { color: #ff6978; }
.control-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
label { display: grid; gap: .45rem; color: #c4ced5; }
.input-row { display: grid; grid-template-columns: 1fr auto; gap: .5rem; }
.color-row { display: flex; flex-wrap: wrap; align-items: end; gap: 1rem; margin-top: 1rem; }
.color-row label { display: flex; align-items: center; gap: .5rem; }

.terminal-shell { overflow: hidden; margin: 1.5rem 0; border: 1px solid var(--scene-border); border-radius: 24px; background: var(--scene-bg); color: var(--scene-text); box-shadow: inset 0 0 70px color-mix(in srgb, var(--brand-primary) 7%, transparent); transition: background .35s, border-color .35s, color .35s; }
.terminal-topbar { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; padding: .8rem 1rem; border-bottom: 1px solid var(--scene-border); font: .75rem/1.3 ui-monospace, monospace; }
.terminal-topbar > :last-child { text-align: right; color: color-mix(in srgb, var(--scene-text) 60%, transparent); }
.dot { display: inline-block; width: .65rem; height: .65rem; margin-right: .35rem; border-radius: 50%; background: var(--brand-primary); }
.dot:nth-child(2) { background: var(--brand-secondary); }
.dot:nth-child(3) { background: var(--brand-accent); }
.terminal-banner { display: flex; gap: 2rem; align-items: center; padding: 1.2rem; border-bottom: 1px solid var(--scene-border); }
.terminal-logo { margin: 0; color: var(--brand-secondary); font: 900 clamp(1.2rem, 4vw, 2.5rem)/.75 ui-monospace, monospace; letter-spacing: .08em; }
.terminal-banner h2 { color: var(--brand-primary); }
.terminal-banner p:last-child { margin: 0; color: var(--brand-accent); font: .78rem ui-monospace, monospace; }
.terminal-content { display: grid; grid-template-columns: minmax(280px, .9fr) minmax(280px, 1.1fr); gap: 1rem; padding: 1.25rem; }
.portrait-panel { position: relative; min-height: 390px; display: grid; place-items: center; overflow: hidden; border: 1px solid var(--scene-border); background: color-mix(in srgb, var(--scene-selection) 65%, transparent); }
#avatarPreview { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .06; filter: grayscale(1) contrast(1.25); }
#asciiPortrait { position: relative; z-index: 1; max-width: 100%; overflow: hidden; margin: 0; padding: 1rem; white-space: pre; font: 8px/.82 ui-monospace, "SFMono-Regular", Consolas, monospace; letter-spacing: 0; }
.telemetry { padding: .5rem; font: .92rem/1.55 ui-monospace, monospace; }
.telemetry .accent { color: var(--brand-secondary); font-weight: 700; margin-bottom: 0; }
.telemetry .signal { margin-top: 3rem; color: var(--brand-accent); }
.transport { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem; }
.transport label { display: flex; align-items: center; gap: .5rem; }
.transport input[type="number"] { width: 5.5rem; }
.check { grid-auto-flow: column; }
footer { padding: 2rem 0 4rem; color: #87949e; font-size: .9rem; }

@media (max-width: 760px) {
  .site-header, .section-heading, .screensaver, .export-panel { align-items: flex-start; flex-direction: column; }
  .control-grid, .terminal-content { grid-template-columns: 1fr; }
  #status { text-align: left; }
  .terminal-topbar { grid-template-columns: 1fr auto; }
  .terminal-topbar > :last-child { display: none; }
  .terminal-banner { align-items: flex-start; flex-direction: column; }
  .portrait-panel { min-height: 320px; }
}