:root {
  --bg: #0a0d12;
  --panel-blue: #1a3a52;
  --panel-blue2: #244d6b;
  --steel: #2b3a47;
  --card: #12171e;
  --card-border: #253141;
  --phosphor: #33ff66;
  --amber: #ffb020;
  --red: #ff3b30;
  --text: #c9d4de;
  --dim: #5a6b7a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(ellipse at top, #13202b 0%, var(--bg) 60%),
    var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  min-height: 100vh;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
}

/* ---------- Front Panel Header ---------- */
.panel-header {
  background: linear-gradient(180deg, var(--panel-blue2) 0%, var(--panel-blue) 55%, #12283a 100%);
  border: 1px solid #0c1a26;
  border-radius: 8px;
  padding: 16px 20px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 6px 20px rgba(0,0,0,0.5);
  margin-bottom: 16px;
  animation: bootFade 0.8s ease;
}
@keyframes bootFade { from { opacity:0; transform: translateY(-8px);} to {opacity:1;} }

.ph-top {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.ph-brand {
  font-family: 'Bricolage Grotesque', sans-serif;
  display: flex; align-items: baseline; gap: 8px;
}
.ph-logo {
  font-size: 32px; font-weight: 800; letter-spacing: 4px;
  color: #eaf2f8; text-shadow: 0 2px 4px rgba(0,0,0,0.6);
}
.ph-model {
  font-size: 20px; font-weight: 700; letter-spacing: 2px;
  color: var(--amber);
  border: 2px solid var(--amber); border-radius: 4px; padding: 0 6px;
}
.ph-status { display: flex; gap: 18px; }

.ph-leds {
  display: flex; gap: 32px; margin-top: 16px; flex-wrap: wrap;
}
.led-group { display: flex; flex-direction: column; gap: 6px; }
.led-title { font-size: 9px; letter-spacing: 2px; color: #a8c4d6; opacity: 0.7; }
.led-row { display: flex; gap: 5px; }

/* ---------- LEDs ---------- */
.led-wrap { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.led {
  width: 11px; height: 11px; border-radius: 50%;
  background: #1a1d22;
  border: 1px solid #000;
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.8);
  transition: box-shadow 0.05s;
}
.led-big { width: 14px; height: 14px; }
.led-on {
  background: var(--led-color);
  box-shadow: 0 0 8px var(--led-color), 0 0 3px var(--led-color), inset 0 0 2px rgba(255,255,255,0.5);
}
.led-label { font-size: 8px; letter-spacing: 1px; color: #cfe0ec; }

/* ---------- Controls ---------- */
.controls {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
  margin-bottom: 16px;
}
.btn {
  background: linear-gradient(180deg, #2c3a47 0%, #1c262f 100%);
  color: var(--text);
  border: 1px solid #3a4a58;
  border-radius: 5px;
  padding: 9px 16px;
  font-family: inherit; font-size: 12px; font-weight: 700;
  letter-spacing: 1px; cursor: pointer;
  box-shadow: 0 2px 0 #0c1319, inset 0 1px 0 rgba(255,255,255,0.06);
  transition: transform 0.05s, filter 0.1s;
}
.btn:hover:not(:disabled) { filter: brightness(1.2); }
.btn:active:not(:disabled) { transform: translateY(2px); box-shadow: none; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-upload { background: linear-gradient(180deg,#3a5a44,#25402e); border-color:#4a7256; color:#d4f0dc; }
.btn-run { background: linear-gradient(180deg,#2a6b3d,#1a4527); border-color:#34d058; color:#d4f0dc; }
.btn-stop { background: linear-gradient(180deg,#8a2a24,#5a1a16); border-color:#ff3b30; color:#f8d4d0; }
.btn-clear { background: linear-gradient(180deg,#3a2c2c,#241c1c); border-color:#5a4444; }

.sel {
  background: #1c262f; color: var(--text);
  border: 1px solid #3a4a58; border-radius: 5px;
  padding: 9px 10px; font-family: inherit; font-size: 11px; cursor: pointer;
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(280px, 1.4fr) minmax(320px, 1.6fr);
  gap: 16px;
}
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 14px;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.3);
}
.card-title {
  font-size: 11px; letter-spacing: 3px; color: var(--amber);
  margin-bottom: 12px; padding-bottom: 8px;
  border-bottom: 1px solid var(--card-border);
  font-weight: 700;
}

/* ---------- CPU Panel ---------- */
.reg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 8px; }
.reg-grid-wide { margin-bottom: 12px; }
.reg {
  display: flex; justify-content: space-between; align-items: center;
  background: #0b0f14; border: 1px solid #1e2833; border-radius: 4px;
  padding: 5px 10px;
}
.reg-name { font-size: 11px; color: var(--dim); font-weight: 700; }
.reg-val { font-size: 15px; color: var(--phosphor); font-weight: 700; text-shadow: 0 0 6px rgba(51,255,102,0.4); }

.flags { display: flex; gap: 6px; margin-bottom: 12px; }
.flag {
  flex: 1; text-align: center; padding: 6px 0;
  background: #0b0f14; border: 1px solid #1e2833; border-radius: 4px;
  font-size: 12px; font-weight: 700; color: var(--dim);
}
.flag-on {
  color: #0a0d12; background: var(--amber); border-color: var(--amber);
  box-shadow: 0 0 8px rgba(255,176,32,0.5);
}

.disasm {
  background: #0b0f14; border: 1px solid #1e2833; border-radius: 4px;
  padding: 8px 10px; font-size: 12px; margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.disasm-addr { color: var(--dim); }
.disasm-txt { color: var(--phosphor); font-weight: 700; }
.disasm-op { color: var(--dim); margin-left: auto; font-size: 10px; }

.stats { display: flex; justify-content: space-between; font-size: 11px; margin-bottom: 10px; }
.stat-label { color: var(--dim); }
.stat-val { color: var(--amber); font-weight: 700; }

.filename { font-size: 11px; color: var(--phosphor); }
.filename.dim { color: var(--dim); }

/* ---------- Terminal ---------- */
.terminal-title, .mem-title { display: flex; justify-content: space-between; align-items: center; }
.mini-btn {
  background: #1c262f; color: var(--text); border: 1px solid #3a4a58;
  border-radius: 3px; padding: 3px 8px; font-family: inherit; font-size: 9px;
  letter-spacing: 1px; cursor: pointer;
}
.mini-btn:hover { filter: brightness(1.3); }

.terminal {
  background: #020604;
  border: 1px solid #0c2a16;
  border-radius: 4px;
  height: 340px;
  padding: 12px;
  overflow-y: auto;
  color: var(--phosphor);
  font-size: 13px;
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-all;
  text-shadow: 0 0 4px rgba(51,255,102,0.5);
  outline: none;
  cursor: text;
  background-image: repeating-linear-gradient(0deg, rgba(0,0,0,0.15) 0px, rgba(0,0,0,0.15) 1px, transparent 1px, transparent 3px);
}
.terminal:focus { border-color: #33ff66; box-shadow: 0 0 8px rgba(51,255,102,0.2); }
.term-cursor { animation: blink 1s steps(2) infinite; }
@keyframes blink { 0%,50% { opacity:1; } 50.01%,100% { opacity:0; } }
.term-hint { font-size: 9px; color: var(--dim); margin-top: 6px; letter-spacing: 1px; }

/* ---------- Memory ---------- */
.mem-nav { display: flex; gap: 4px; align-items: center; }
.mem-jump-label { font-size: 11px; color: var(--dim); }
.mem-jump {
  width: 48px; background: #0b0f14; color: var(--phosphor);
  border: 1px solid #1e2833; border-radius: 3px; padding: 3px 5px;
  font-family: inherit; font-size: 11px; text-transform: uppercase;
}
.mem-dump { font-size: 12px; overflow-x: auto; }
.mem-row {
  display: flex; gap: 12px; align-items: center;
  padding: 1px 0; white-space: nowrap;
}
.mem-addr { color: var(--amber); font-weight: 700; }
.mem-bytes { display: flex; gap: 5px; }
.mem-byte { color: var(--text); }
.mem-byte.mem-zero { color: #35424f; }
.mem-byte.mem-pc {
  background: var(--phosphor); color: #020604; border-radius: 2px;
  padding: 0 1px; margin: 0 -1px; font-weight: 700;
}
.mem-ascii { color: var(--dim); letter-spacing: 1px; }

/* ---------- Footer ---------- */
.footer {
  margin-top: 20px; padding-top: 14px;
  border-top: 1px solid var(--card-border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px;
  font-size: 10px; color: var(--dim); letter-spacing: 1px;
}
.remix { color: var(--amber); text-decoration: none; font-weight: 700; }
.remix:hover { text-decoration: underline; }