@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;700;900&family=Share+Tech+Mono&display=swap');

:root {
  --bg: #050510;
  --bg-2: #0a0a20;
  --surface: #0f0f25;
  --surface-2: #151538;
  --border: #2a2a6b;
  --text: #e0e0ff;
  --muted: #7b7bff;
  --accent: #00f0ff;
  --accent-2: #ff00ff;
  --accent-3: #39ff14;
  --danger: #ff2a6d;
  --warning: #ffee00;
  --radius: 16px;
  --glow: 0 0 10px currentColor, 0 0 20px currentColor;
  --font: 'Orbitron', system-ui, sans-serif;
  --mono: 'Share Tech Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(circle at 15% 20%, rgba(0, 240, 255, 0.12) 0%, transparent 35%),
    radial-gradient(circle at 85% 80%, rgba(255, 0, 255, 0.12) 0%, transparent 35%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-2) 50%, var(--surface) 100%);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  min-height: 100vh;
  text-shadow: 0 0 5px rgba(224, 224, 255, 0.25);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px;
}

header {
  text-align: center;
  margin-bottom: 32px;
  position: relative;
}

header h1 {
  margin: 0 0 8px;
  font-size: 3.6rem;
  font-weight: 900;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  text-shadow:
    0 0 10px var(--accent),
    0 0 25px var(--accent),
    0 0 50px var(--accent),
    0 0 80px var(--accent-2);
  animation: titlePulse 3s ease-in-out infinite alternate;
}

@keyframes titlePulse {
  from {
    text-shadow:
      0 0 10px var(--accent),
      0 0 25px var(--accent),
      0 0 50px var(--accent),
      0 0 80px var(--accent-2);
  }
  to {
    text-shadow:
      0 0 15px var(--accent),
      0 0 35px var(--accent),
      0 0 70px var(--accent),
      0 0 110px var(--accent-2);
  }
}

header p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  letter-spacing: 1px;
}

.io-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}

@media (max-width: 760px) {
  .io-panels {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: rgba(15, 15, 37, 0.7);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow:
    0 0 20px rgba(0, 240, 255, 0.08),
    inset 0 0 30px rgba(0, 240, 255, 0.04);
  backdrop-filter: blur(8px);
  transition: box-shadow 0.25s, border-color 0.25s;
}

.panel:focus-within,
.panel:hover {
  border-color: var(--accent);
  box-shadow:
    0 0 25px rgba(0, 240, 255, 0.18),
    inset 0 0 40px rgba(0, 240, 255, 0.08);
}

.panel-header,
.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: linear-gradient(90deg, var(--surface-2), var(--surface));
  border-bottom: 1px solid var(--border);
}

.panel-header label,
.control-row label {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
}

.output-panel .panel-header label {
  color: var(--accent-2);
}

textarea {
  width: 100%;
  min-height: 240px;
  padding: 16px;
  background: rgba(10, 10, 32, 0.85);
  color: var(--text);
  border: none;
  resize: vertical;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.5;
  outline: none;
  caret-color: var(--accent);
}

textarea::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

textarea:focus {
  background: rgba(10, 10, 32, 0.95);
}

.panel-footer {
  color: var(--muted);
  font-size: 0.85rem;
  font-family: var(--mono);
  border-bottom: none;
  border-top: 1px solid var(--border);
}

.status {
  font-size: 0.85rem;
  min-height: 1.2em;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.status.ok {
  color: var(--accent-3);
  text-shadow: 0 0 8px var(--accent-3);
}

.status.error {
  color: var(--danger);
  text-shadow: 0 0 8px var(--danger);
}

.controls {
  background: rgba(15, 15, 37, 0.7);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 22px;
  box-shadow:
    0 0 20px rgba(255, 0, 255, 0.08),
    inset 0 0 30px rgba(255, 0, 255, 0.04);
  backdrop-filter: blur(8px);
}

.control-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.control-row:last-child {
  margin-bottom: 0;
}

select,
input[type="number"] {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: var(--font);
  font-size: 0.95rem;
  outline: none;
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.05);
  transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus,
input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

select {
  flex: 1;
}

select optgroup {
  background: var(--surface-2);
  color: var(--accent-2);
  font-weight: 700;
}

select option {
  background: var(--surface);
  color: var(--text);
}

input[type="number"] {
  width: 90px;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

button {
  cursor: pointer;
  border: 1.5px solid currentColor;
  border-radius: 10px;
  padding: 10px 16px;
  background: transparent;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: -1;
}

button:hover {
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

button:hover::before {
  opacity: 0.12;
}

button:active {
  transform: translateY(1px);
}

button.small {
  padding: 5px 12px;
  font-size: 0.75rem;
  border-radius: 8px;
}

button.primary {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
}

button.primary:hover {
  background: rgba(0, 240, 255, 0.12);
  box-shadow:
    0 0 15px var(--accent),
    0 0 30px var(--accent);
}

button.secondary {
  color: var(--accent-2);
  border-color: var(--accent-2);
  box-shadow: 0 0 12px rgba(255, 0, 255, 0.2);
}

button.secondary:hover {
  background: rgba(255, 0, 255, 0.12);
  box-shadow:
    0 0 15px var(--accent-2),
    0 0 30px var(--accent-2);
}

.history {
  background: rgba(15, 15, 37, 0.7);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow:
    0 0 20px rgba(57, 255, 20, 0.06),
    inset 0 0 30px rgba(57, 255, 20, 0.03);
  backdrop-filter: blur(8px);
}

.history h2 {
  margin: 0 0 14px;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--accent-3);
  text-shadow: 0 0 10px var(--accent-3);
  letter-spacing: 1px;
}

#history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 220px;
  overflow-y: auto;
}

#history-list li {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  transition: background 0.15s, color 0.15s;
  font-family: var(--mono);
}

#history-list li:last-child {
  border-bottom: none;
}

#history-list li:hover {
  background: rgba(0, 240, 255, 0.08);
  color: var(--text);
}

#history-list .h-mode {
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
  text-shadow: 0 0 6px var(--accent);
}

#history-list .h-preview {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

footer {
  text-align: center;
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

[hidden] {
  display: none !important;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--surface);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* Scanline overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(0, 240, 255, 0.03) 0px,
      rgba(0, 240, 255, 0.03) 1px,
      transparent 1px,
      transparent 3px
    );
  z-index: 9999;
}