:root {
  --bg: #000000;
  --surface: rgba(0, 0, 0, 0.75);
  --border: rgba(255, 255, 255, 0.15);
  --muted: rgba(255, 255, 255, 0.5);
  --terminal-color: #00ff66; /* default, overridden by theme classes */
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body.terminal {
  margin: 0;
  background: var(--bg);
  color: var(--terminal-color);
  font-family: "Courier New", Courier, "Lucida Console", monospace;
  line-height: 1.5;
  text-shadow: 0 0 2px color-mix(in oklab, var(--terminal-color) 80%, transparent), 0 0 8px color-mix(in oklab, var(--terminal-color) 30%, transparent);
}

/* Theme color classes */
.theme-white { --terminal-color: #e6e6e6; }
.theme-green { --terminal-color: #00ff66; }
.theme-amber { --terminal-color: #ffbf00; }
.theme-cyan  { --terminal-color: #00ffff; }

/* CRT scanline overlay */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom,
      rgba(0,0,0,0.15) 0%,
      rgba(0,0,0,0.15) 100%),
    repeating-linear-gradient(
      to bottom,
      rgba(255,255,255,0.02) 0px,
      rgba(255,255,255,0.02) 2px,
      rgba(0,0,0,0.02) 3px,
      rgba(0,0,0,0.02) 6px
    );
  mix-blend-mode: multiply;
  z-index: 1;
}

/* Layout */
.terminal-header, .terminal-footer {
  position: relative;
  z-index: 2;
  padding: 16px;
  border-bottom: 1px dashed var(--border);
}

.terminal-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-block {
  display: inline-block;
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  letter-spacing: 1px;
}

.brand-sub {
  color: var(--muted);
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 10px;
}

.control-label {
  color: var(--muted);
  margin-right: 4px;
}

.color-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-btn {
  cursor: pointer;
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--terminal-color);
  text-shadow: inherit;
  letter-spacing: 1px;
}

.color-btn:focus-visible {
  outline: 2px solid var(--terminal-color);
  outline-offset: 2px;
}

.color-btn.active {
  background: rgba(255,255,255,0.05);
}

.terminal-main {
  position: relative;
  z-index: 2;
  padding: 16px;
}

.section-title {
  margin: 0 0 12px 0;
  color: var(--muted);
  font-weight: normal;
  letter-spacing: 1px;
}

.programs {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 12px;
}

/* Program grid */
.program-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

@media (min-width: 600px) {
  .program-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 900px) {
  .program-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.program-item {
  border: 1px dashed var(--border);
}

.program-link {
  display: flex;
  justify-content: space-between;
  padding: 10px 12px;
  color: var(--terminal-color);
  text-decoration: none;
  transition: background 0.2s ease, transform 0.05s ease;
}

.program-link:hover {
  background: rgba(255,255,255,0.06);
}

.program-link:active {
  transform: translateY(1px);
}

.program-name {
  letter-spacing: 1px;
}

.program-path {
  color: var(--muted);
}

/* Footer */
.terminal-footer {
  border-top: 1px dashed var(--border);
  border-bottom: none;
}

.status-line {
  letter-spacing: 2px;
}

.footer-note {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

/* Subtle flicker animation (very light) */
@keyframes flicker {
  0%, 19%, 21%, 49%, 51%, 100% { opacity: 1; }
  20%, 50% { opacity: 0.98; }
}

body.terminal {
  animation: flicker 12s infinite;
}