:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #141c32;
  --border: #2a385a;
  --text: #f4f7ff;
  --muted: #aab7d4;
  --accent: #7c5cff;
  --accent2: #22d3ee;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; font-family: Inter, ui-sans-serif, system-ui, Arial, sans-serif;
  color: var(--text); background: radial-gradient(ellipse at top, #1c2850 0, var(--bg) 60%);
}
.shell { width: min(760px, calc(100% - 28px)); margin: 0 auto; padding: 44px 0 28px; }
header { text-align: center; margin-bottom: 28px; }
.logo { font-size: 42px; }
.eyebrow { color: var(--accent2); letter-spacing: .16em; font-size: .75rem; font-weight: 800; }
h1 { font-size: clamp(2.1rem, 7vw, 3.5rem); margin: 8px 0; letter-spacing: -.04em; }
h2 { margin-top: 0; }
.intro, .help, #rotationInfo, li { color: var(--muted); line-height: 1.6; }
.panel { background: rgba(20, 28, 50, .94); border: 1px solid var(--border); border-radius: 18px; padding: 24px; margin: 16px 0; box-shadow: 0 12px 34px #0002; }
.current { text-align: center; border-color: #5144a0; }
.current h2 { overflow-wrap: anywhere; font-size: clamp(1.2rem, 4vw, 2rem); }
textarea { width: 100%; resize: vertical; padding: 14px; color: var(--text); background: #0b1225; border: 1px solid var(--border); border-radius: 12px; font: 1rem/1.6 ui-monospace, monospace; }
textarea:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.button { display: inline-block; border: 0; border-radius: 10px; padding: 12px 16px; font-weight: 800; cursor: pointer; text-decoration: none; text-align: center; }
.primary { color: white; background: linear-gradient(100deg, var(--accent), #4d8dff); }
.secondary { color: var(--text); background: #263453; }
.button:hover { filter: brightness(1.12); }
.hidden { display: none; }
.status { min-height: 1.5em; color: var(--accent2); }
ul { padding-left: 22px; }
li { margin: 8px 0; }
footer { text-align: center; padding: 20px; color: #7f8eaf; font-size: .85rem; }
@media (max-width: 520px) { .shell { padding-top: 24px; } .panel { padding: 18px; } .actions .button { width: 100%; } }