/* Cipher Machine — TARGET-OS skin (matches the Operation Ciphertext game:
 * night-grid palette, Space Grotesk/Mono, panel + keycap primitives). */

:root{
  --bg:#0e1220; --bg-glow:#171c30; --edge:#262b52; --tile:#232a4a;
  --ink:#eaecff; --muted:#8a91b4; --accent:#53e0e0; --win:#c6f94f;
  --danger:#ff4757; --plate:#f5a623;
  --font-ui:'Space Grotesk',sans-serif; --font-mono:'Space Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0}

body{
  min-height:100vh;padding:26px 18px;
  font-family:var(--font-ui);color:var(--ink);
  background:
    radial-gradient(1.5px 1.5px at 22% 18%, rgba(255,255,255,.14) 50%, transparent 51%),
    radial-gradient(1px 1px at 68% 62%, rgba(255,255,255,.1) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 85% 30%, rgba(255,255,255,.08) 50%, transparent 51%),
    radial-gradient(ellipse at 70% 20%, #182040 0%, var(--bg) 55%);
  background-size:260px 260px, 200px 200px, 320px 320px, 100% 100%;
  display:grid;place-items:start center;
}
.wrap{width:min(600px,100%);display:flex;flex-direction:column;gap:14px}

.head{margin-bottom:2px}
.app-title{
  font-size:22px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
}
.app-title::after{
  content:'';display:inline-block;width:8px;height:8px;margin-left:10px;
  border-radius:50%;background:var(--accent);vertical-align:middle;
}
.sub{color:var(--muted);font-size:14px;margin-top:6px;line-height:1.5}
b.win{color:var(--win)}
b.accent{color:var(--accent)}

.panel{
  background:var(--bg-glow);border:1px solid var(--edge);border-radius:16px;
  box-shadow:0 8px 24px rgba(0,0,0,.35);padding:14px 16px;
}
.panel > label, .keybox > label, .modebox > label, .resultHead label{
  display:block;font-size:10.5px;font-weight:700;letter-spacing:.18em;
  color:var(--muted);margin-bottom:9px;
}

textarea{
  width:100%;font-family:var(--font-mono);font-size:15px;color:var(--ink);
  background:rgba(14,18,32,.7);border:1px solid var(--edge);border-radius:9px;
  padding:10px 12px;resize:vertical;
}
textarea:focus-visible{outline:2px solid var(--accent);outline-offset:1px}

/* ─── controls row ─── */
.controls{display:flex;gap:14px;flex-wrap:wrap}
.keybox{flex:0 0 auto;display:flex;flex-direction:column;align-items:center}
.modebox{flex:1;min-width:240px;display:flex;flex-direction:column}

.keypad{display:flex;align-items:center;gap:10px}
.step{
  width:52px;height:52px;font-size:18px;color:var(--ink);cursor:pointer;
  background:var(--tile);border:1px solid var(--edge);border-radius:12px;
  transition:transform 100ms, filter 100ms;
}
.step:hover{filter:brightness(1.25);transform:translateY(-1px)}
.step:active{transform:translateY(1px)}
#keyValue{
  min-width:76px;text-align:center;font-family:var(--font-mono);font-weight:700;
  font-size:38px;color:var(--win);background:rgba(14,18,32,.7);
  border:1px solid var(--edge);border-radius:12px;padding:4px 10px;
}
#keyValue:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.unit{color:var(--muted);font-family:var(--font-mono);font-size:11px;margin-top:9px}

.modes{display:flex;gap:10px}
.btn{
  font-family:var(--font-ui);font-weight:700;letter-spacing:.04em;cursor:pointer;
  border-radius:9px;border:1px solid var(--edge);color:var(--ink);background:#222948;
  transition:transform 120ms, filter 120ms;
}
.btn:hover{transform:translateY(-1px);filter:brightness(1.15)}
.btn.mode{flex:1;padding:14px 10px;font-size:15px}
.btn.mode.encrypt.is-active{background:var(--win);border-color:var(--win);color:#10250f}
.btn.mode.decrypt.is-active{background:var(--accent);border-color:var(--accent);color:#06222b}
.btn.small{padding:6px 14px;font-size:12px;background:var(--tile)}

/* ─── result ─── */
.resultHead{display:flex;justify-content:space-between;align-items:center}
.resultHead label{margin-bottom:0}
.output{
  margin-top:10px;min-height:58px;
  font-family:var(--font-mono);font-size:16px;line-height:1.7;color:var(--plate);
  background:rgba(14,18,32,.7);border:1px dashed var(--edge);border-radius:9px;
  padding:12px;word-break:break-word;white-space:pre-wrap;user-select:text;
}

.hint{color:var(--muted);font-size:13px;line-height:1.6}