:root{
  --bg:#1c1c1c;
  --panel:#2a2a2a;
  --muted:#b0b0b0;
  --text:#f5f5f5;
  --btn-success:#81C784;
  --btn-danger:#E57373;
  --btn-enter:#FFD54F;
  --btn-clear:#757575;
  --btn-cancel:#B71C1C;
  --kbd-bg:#333333;
  --border-black:#000000;
  --radius:10px;
  --shadow: 0 8px 20px rgba(0,0,0,0.6);
  --overlay-bg: rgba(20,20,20,0.92);
  --ready-color: #E0E0E0;
  --touch-size: min(64px, 12vw);
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial;background:var(--bg);color:var(--text)}
.wrap{width:94%;max-width:1000px;margin:16px auto;padding:8px}
.card{background:var(--panel);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:12px;min-width:0;flex:1 1 auto}
.logo{width:56px;height:56px;border-radius:12px;display:block;object-fit:contain;background:#1f1f1f}
.titles{min-width:0}
.titles h1{margin:0;font-size:18px;line-height:1.15;overflow-wrap:anywhere}
.titles .tagline{margin:0;color:var(--muted);font-size:13px;line-height:1.2;overflow-wrap:anywhere}
.terminal-header-actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin-left:auto;flex:0 0 auto}
.header-link{display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:7px 10px;border:2px solid var(--border-black);border-radius:8px;background:#333;color:var(--text);font-size:12px;font-weight:800;text-decoration:none;line-height:1.1}
.header-link:hover,.header-link:focus-visible{background:#454545;outline:2px solid var(--btn-enter);outline-offset:2px}

/* clock area */
.clock-area{text-align:center;margin-bottom:12px}
.clock-top{display:flex;align-items:center;gap:12px;justify-content:center}
.clock-left{display:flex;align-items:center;flex:0 0 48px}
.status-light{width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#444;border:2px solid var(--border-black)}
.status-light .led-inner{width:10px;height:10px;border-radius:50%;display:block}
.status-light.green{background:linear-gradient(180deg,var(--btn-success),#60A867)}
.status-light.red{background:linear-gradient(180deg,var(--btn-cancel),#9b1a1a)}
.status-light.amber{background:linear-gradient(180deg,#F4B400,#D9A000)}
.status-light.flash{animation:flash 0.5s linear infinite}
@keyframes flash{0%{opacity:1}50%{opacity:.15}100%{opacity:1}}

.clock-main{display:flex;flex-direction:column;align-items:center}
.clock{font-weight:800;font-size:22px;color:var(--text);font-family:"Roboto Mono",monospace}
.clock-sub{font-size:13px;color:var(--muted);margin-top:6px}

/* overlay */
.overlay{position:relative;margin-top:10px;height:88px;display:flex;align-items:center;justify-content:center}
.msg{position:absolute;left:50%;transform:translateX(-50%);top:0;width:100%;max-width:840px;background:var(--overlay-bg);padding:12px 16px;border-radius:10px;color:var(--text);font-weight:700;font-size:15px;display:none;white-space:pre-line;text-align:center;border:2px solid var(--border-black)}
.msg.show{display:block;animation:fade .12s ease-out}
@keyframes fade{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}

/* layout grid - mobile first */
.grid{display:grid;grid-template-columns:1fr;gap:12px;align-items:start}
@media (min-width:900px){ .grid{grid-template-columns:1fr 360px} }
@media (max-width:560px){
  .header{gap:8px}
  .brand{gap:9px}
  .logo{width:48px;height:48px;border-radius:10px}
  .titles h1{font-size:16px}
  .titles .tagline{font-size:12px}
  .header-link{min-height:32px;padding:7px 8px;white-space:nowrap}
}

/* terminal & keypad */
.terminal{background:var(--panel);padding:12px;border-radius:12px;border:1px solid rgba(255,255,255,0.03)}
.display{background:#232323;padding:10px;border-radius:10px;text-align:center;margin-bottom:10px;font-weight:700;font-size:16px;letter-spacing:1px;color:var(--text);display:flex;flex-direction:column;gap:8px;align-items:center}
.prompt{font-size:13px;color:var(--ready-color);font-weight:800}
.masked{font-family:monospace;letter-spacing:10px;display:inline-block;transition:all 140ms ease;font-size:20px;color:var(--ready-color)}

/* keypad */
.numpad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:12px}
.key{padding:calc(var(--touch-size) * 0.28);border-radius:10px;background:var(--kbd-bg);border:2px solid var(--border-black);font-weight:800;font-size:18px;cursor:pointer;color:var(--text);text-shadow:1px 1px 0 var(--border-black);transition:transform .06s, box-shadow .08s;min-height:var(--touch-size)}
.key:active{transform:translateY(2px)}
.key.clear{background:var(--btn-clear);color:#fff}
.key.blank{background:transparent;border:none}
.helper{font-size:12px;color:var(--muted);margin-top:6px;text-align:center}

/* secondary actions */
.secondary-actions{display:flex;gap:10px;justify-content:center;margin-bottom:10px;flex-wrap:wrap}
.btn-enter{background:var(--btn-enter);color:#000;padding:12px 18px;border-radius:10px;border:2px solid var(--border-black);font-weight:800;cursor:pointer;min-width:120px}
.btn-cancel{background:var(--btn-cancel);color:#fff;padding:12px 18px;border-radius:10px;border:2px solid var(--border-black);font-weight:800;cursor:pointer;min-width:120px}

/* actions column (main punch buttons) */
.actions{display:flex;flex-direction:row;gap:8px;flex-wrap:wrap;justify-content:center}
.actions .btn{flex:1 1 140px;padding:14px;border-radius:10px;border:2px solid var(--border-black);font-weight:800;color:#fff;font-size:15px;cursor:pointer;min-height:52px}
.btn.in{background:var(--btn-success);color:#fff;text-shadow:1px 1px 0 var(--border-black)}
.btn.out{background:var(--btn-danger);color:#fff;text-shadow:1px 1px 0 var(--border-black)}
.btn.menu{background:#5f5f5f;color:#fff;text-shadow:1px 1px 0 var(--border-black)}

/* footer */
footer{margin-top:12px;text-align:center;color:var(--muted);font-size:12px}
.f-brand{font-size:11px;color:var(--muted);margin-top:6px}
.f-copy{font-size:11px;color:var(--muted);margin-top:6px}

/* accessible reduces */
@media (prefers-reduced-motion:reduce){ *{transition:none!important} }