/* Theme tokens on :root — app.js swaps the whole palette at once.
   Transitions are on individual elements; the corner-to-corner "wave"
   wipe sits on a fixed overlay (.wave) so it doesn't shift layout. */
:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --primary: #22d3ee;
  --primary-soft: #2dd4bf;
  --accent: #f59e0b;
  --success: #22c55e;
  --border: #30363d;
  --border-bright: #3a4754;

  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --theme-transition: 750ms cubic-bezier(0.4, 0, 0.2, 1);
  --wave-duration: 1100ms;
  --shadow-glow: 0 0 32px color-mix(in srgb, var(--primary) 12%, transparent),
    0 0 96px color-mix(in srgb, var(--primary) 6%, transparent);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color var(--theme-transition), color var(--theme-transition);
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  position: relative;
  isolation: isolate;
}

.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 2px,
    rgba(255, 255, 255, 0.012) 2px,
    rgba(255, 255, 255, 0.012) 3px
  );
  mix-blend-mode: screen;
}

.vignette {
  position: fixed;
  inset: -10%;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(ellipse at center, transparent 30%, rgba(0, 0, 0, 0.7) 100%);
}

/* ===== Wave transition =================================================
   Fixed full-viewport overlay. On a theme swap we paint the NEXT theme's
   bg into this overlay, then animate its `clip-path` from a corner so it
   reveals the new palette like a tide rolling across the page. After the
   wipe finishes JS commits the palette to :root and resets the overlay.
   `--wave-corner` rotates each cycle (TL → TR → BR → BL).
   `--wave-bg` is set by JS just before activation. */
.wave {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: var(--wave-bg, transparent);
  clip-path: var(--wave-clip-start, circle(0% at 0% 0%));
  opacity: 0;
}

.wave.is-running {
  opacity: 1;
  clip-path: var(--wave-clip-end, circle(150% at 0% 0%));
  transition:
    clip-path var(--wave-duration) cubic-bezier(0.65, 0, 0.35, 1),
    opacity 250ms ease-out;
}

.terminal {
  position: relative;
  z-index: 3;
  width: min(760px, 100%);
  border: 1px solid var(--border-bright);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg) 100%);
  box-shadow: var(--shadow-glow);
  overflow: hidden;
  transition:
    border-color var(--theme-transition),
    background var(--theme-transition),
    box-shadow var(--theme-transition);
}

/* ===== Terminal chrome with tabs ====================================== */
.terminal__chrome {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 0 10px;
  background: color-mix(in srgb, var(--bg) 90%, black);
  border-bottom: 1px solid var(--border);
  transition: background var(--theme-transition), border-color var(--theme-transition);
}

.dots { display: flex; gap: 8px; padding-bottom: 8px; flex-shrink: 0; }

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.4);
}

.dot--red { background: #ff5f57; }
.dot--amber { background: #febc2e; }
.dot--green { background: #28c840; }

/* Tab strip: looks like macOS Terminal.app — pills with bottom-rounded
   corners that sit on top of the body. Active tab "merges" into the
   body by drawing same background and no bottom border. */
.tabs {
  display: flex;
  gap: 2px;
  flex: 1;
  min-width: 0;
  align-items: flex-end;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
  cursor: pointer;
  position: relative;
  bottom: -1px;
  max-width: 220px;
  overflow: hidden;
  transition:
    color var(--theme-transition),
    background var(--theme-transition),
    border-color var(--theme-transition),
    transform 160ms ease;
}

.tab:hover { color: var(--fg); transform: translateY(-1px); }

.tab.is-active {
  color: var(--primary);
  background: var(--bg-elevated);
  border-color: var(--border-bright);
}

.tab__title { font-weight: 500; }
.tab__shell { color: var(--fg-dim); font-size: 11px; }
.tab.is-active .tab__shell { color: var(--fg-dim); }

.tab:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== Theme toggle (top-right of chrome) ============================ */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  cursor: pointer;
  flex-shrink: 0;
  /* Subtle continuous bounce so the affordance reads as interactive,
     not as decoration. 4s loop is slow enough to be peripheral. */
  animation: toggle-bounce 4s ease-in-out infinite;
  transition:
    color var(--theme-transition),
    border-color var(--theme-transition),
    background-color 160ms ease,
    transform 160ms ease;
}

@keyframes toggle-bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-2px); }
}

.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  animation-play-state: paused;
  transform: translateY(-3px);
}

.theme-toggle:active { transform: translateY(0); }

.theme-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.theme-toggle__icon {
  color: var(--primary);
  font-size: 12px;
  /* Slow spin on the half-circle so it reads as "in motion" without
     becoming a distracting fidget. */
  animation: toggle-spin 12s linear infinite;
  display: inline-block;
  transition: color var(--theme-transition);
}

@keyframes toggle-spin {
  to { transform: rotate(360deg); }
}

.theme-toggle__label {
  text-transform: lowercase;
  letter-spacing: 0.04em;
}

/* ===== Views (vigil / preview) ======================================== */
.terminal__body { padding: clamp(20px, 4vw, 40px) clamp(18px, 4vw, 36px); }
.view[hidden] { display: none; }
.view:not(.is-active) { display: none; }

.logo {
  margin: 0 0 20px 0;
  font-family: var(--font-mono);
  font-size: clamp(8px, 1.6vw, 13px);
  line-height: 1.05;
  color: var(--primary);
  text-shadow:
    0 0 6px color-mix(in srgb, var(--primary) 45%, transparent),
    0 0 18px color-mix(in srgb, var(--primary) 25%, transparent);
  white-space: pre;
  overflow-x: auto;
  scrollbar-width: none;
  transition: color var(--theme-transition), text-shadow var(--theme-transition);
}

.logo::-webkit-scrollbar { display: none; }

.tagline {
  margin: 0 0 20px 0;
  color: var(--fg);
  font-size: clamp(14px, 1.8vw, 16px);
  letter-spacing: 0.01em;
  transition: color var(--theme-transition);
}

.tagline__muted { color: var(--primary-soft); margin-right: 6px; transition: color var(--theme-transition); }
.tagline__sep { color: var(--fg-dim); margin: 0 4px; transition: color var(--theme-transition); }

.features {
  list-style: none;
  margin: 0 0 28px 0;
  padding: 0;
  display: grid;
  gap: 6px;
  font-size: clamp(12px, 1.6vw, 14px);
  color: var(--fg-dim);
  transition: color var(--theme-transition);
}

.features li { padding-left: 4px; }
.features__chk { color: var(--success); margin-right: 8px; font-weight: 700; transition: color var(--theme-transition); }

/* ===== Install widget ================================================= */
.install {
  border: 1px dashed var(--border-bright);
  border-radius: 6px;
  padding: 14px;
  margin-bottom: 22px;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  transition: border-color var(--theme-transition), background-color var(--theme-transition);
}

.install__tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 12px; }

.install__tab {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  cursor: pointer;
  letter-spacing: 0.03em;
  transition:
    color var(--theme-transition),
    border-color var(--theme-transition),
    background-color 140ms ease,
    transform 140ms ease;
}

.install__tab:hover { color: var(--fg); border-color: var(--border-bright); transform: translateY(-1px); }
.install__tab.is-active {
  color: var(--primary);
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}
.install__tab:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.install__panel { display: block; }
.install__panel[hidden] { display: none; }
.install__hint { margin: 4px 0 12px 0; font-size: 12px; color: var(--fg-dim); transition: color var(--theme-transition); }

.install__binary-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.binary {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 12px;
  text-decoration: none;
  color: var(--fg);
  background: transparent;
  transition:
    color var(--theme-transition),
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.binary:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  transform: translateY(-1px);
}
.binary:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.binary__os { font-size: 13px; font-weight: 500; }
.binary__arch { font-size: 11px; color: var(--fg-dim); transition: color var(--theme-transition); }
.binary:hover .binary__arch { color: var(--primary-soft); }

.cmd {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: transparent;
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.5vw, 14px);
  color: var(--fg);
  text-align: left;
  cursor: pointer;
  transition: color var(--theme-transition), border-color var(--theme-transition), background-color 160ms ease;
}

.cmd:hover { background: color-mix(in srgb, var(--primary) 6%, transparent); border-color: var(--primary); }
.cmd:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.cmd__prompt {
  color: var(--primary);
  font-weight: 700;
  text-shadow: 0 0 8px color-mix(in srgb, var(--primary) 60%, transparent);
  transition: color var(--theme-transition), text-shadow var(--theme-transition);
}

.cmd__bracket { color: var(--fg-dim); transition: color var(--theme-transition); }

.cmd__text {
  color: var(--primary);
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  transition: color var(--theme-transition);
}

.cmd__text::-webkit-scrollbar { display: none; }

.cmd__copy {
  margin-left: auto;
  font-size: 11px;
  color: var(--fg-dim);
  padding: 1px 6px;
  border: 1px solid var(--border-bright);
  border-radius: 3px;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  transition: color var(--theme-transition), border-color var(--theme-transition), background-color 160ms ease;
}

.cmd.is-copied { border-color: var(--success); }
.cmd.is-copied .cmd__text, .cmd.is-copied .cmd__copy { color: var(--success); }
.cmd.is-copied .cmd__copy { border-color: var(--success); background: color-mix(in srgb, var(--success) 12%, transparent); }

.cta-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

.cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 0;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.5vw, 14px);
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
  cursor: pointer;
  border-radius: 4px;
  transition: color var(--theme-transition), background-color 120ms ease, transform 120ms ease;
}

.cta__bracket { color: var(--fg-dim); transition: color var(--theme-transition); }
.cta__label { color: var(--primary); transition: color var(--theme-transition); }
.cta:hover { background: color-mix(in srgb, var(--primary) 6%, transparent); transform: translateY(-1px); }
.cta:hover .cta__bracket { color: var(--primary); }
.cta:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.cta--secondary .cta__label { color: var(--fg); }
.cta--secondary:hover .cta__label { color: var(--primary); }

.cursor-line {
  margin: 14px 0 0 0;
  color: var(--fg-dim);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--theme-transition);
}

.cursor-line__prompt { color: var(--primary-soft); transition: color var(--theme-transition); }
.cursor-line__cursor {
  display: inline-block;
  width: 8px;
  background: var(--primary);
  color: transparent;
  animation: blink 1.1s steps(2, end) infinite;
  box-shadow: 0 0 6px color-mix(in srgb, var(--primary) 60%, transparent);
  transition: background-color var(--theme-transition), box-shadow var(--theme-transition);
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ===== Preview (asciinema) ============================================ */
.view--preview { padding-top: 18px; }

.player {
  width: 100%;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: border-color var(--theme-transition), background var(--theme-transition);
}

/* Asciinema's default player UI doesn't pick up our palette — override
   the few CSS vars it exposes plus the most visible classes. */
.ap-wrapper { background: var(--bg-elevated) !important; }
.ap-terminal { background: var(--bg) !important; }
.ap-control-bar { background: color-mix(in srgb, var(--bg) 90%, black) !important; }

.player__caption {
  margin: 12px 0 0 0;
  color: var(--fg-dim);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--theme-transition);
}

.player__caption-prompt { color: var(--primary); transition: color var(--theme-transition); }
.player__caption code {
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent);
  transition: color var(--theme-transition), background-color var(--theme-transition), border-color var(--theme-transition);
}

/* ===== Footer ========================================================= */
.terminal__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 70%, black);
  color: var(--fg-dim);
  font-size: 12px;
  transition: background var(--theme-transition), border-color var(--theme-transition), color var(--theme-transition);
}

.terminal__footer a {
  color: var(--fg-dim);
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: color var(--theme-transition), border-color 160ms ease;
}

.terminal__footer a:hover { color: var(--primary); border-bottom-color: var(--primary); }
.terminal__footer .sep { opacity: 0.4; }

@media (prefers-reduced-motion: reduce) {
  .cursor-line__cursor,
  .theme-toggle,
  .theme-toggle__icon { animation: none; }
  :root { --theme-transition: 0ms; --wave-duration: 0ms; }
  .wave { display: none; }
}

@media (max-width: 540px) {
  .terminal__body { padding: 18px 14px; }
  .terminal__chrome { padding: 6px 8px 0 8px; gap: 6px; }
  .dots { padding-bottom: 6px; }
  .tab { padding: 5px 8px; font-size: 11px; max-width: 130px; }
  .tab__shell { display: none; }
  .install { padding: 10px; }
  .install__tab { font-size: 10px; padding: 4px 8px; }
  .theme-toggle__label { display: none; }
}