/* Listen to PyPI — Styles */

:root {
  /*
   * Color palette — derived from PyPI's brand colors:
   * Primary blue: #006dad  Highlight yellow: #ffd343
   * Logo blues: #3775A9, #4B8BBE, #306998
   * Source: warehouse/static/sass/settings/_colours.scss
   */
  --bg-deep: #0b1120;
  --bg-surface: rgba(11, 17, 32, 0.92);
  --border: #1a2744;
  --text-primary: #e6edf3;
  --text-body: #b8c4d0;
  --text-muted: #7a8da0;
  --text-faint: #7d8fa2; /* 5.7:1 contrast on --bg-deep */
  --text-footer: #6d7f92; /* 4.6:1 contrast on --bg-deep */
  --accent: #4b8bbe; /* PyPI logo mid-blue */
  --btn-green: #148024; /* PyPI $success-color */
  --btn-green-hover: #1a9a2e;

  /* Event type colors — match JS getColor() in visual.js
   * New packages use PyPI highlight yellow, others use logo blues */
  --color-new: #ffd343; /* PyPI $highlight-color */
  --color-major: #4b8bbe; /* PyPI logo blue */
  --color-minor: #3775a9; /* PyPI logo teal-blue */
  --color-patch: #7a8da0;

  /* Log link colors (slightly muted versions of event colors) */
  --log-new: #e6b830;
  --log-major: #5a9cc5; /* 6.3:1 contrast on --bg-deep */
  --log-minor: #4a85aa; /* 4.7:1 contrast on --bg-deep */
  --log-patch: #7a8b9c; /* 5.4:1 contrast on --bg-deep */

  /* Animation durations */
  --circle-life: 12s;
  --label-life: 5s;

  /* Fonts — Source Sans 3 matches PyPI's own typography */
  --font-sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
}

/* ── Reset ── */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Visually hidden but still accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Visible focus indicator for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Respect user preference for reduced motion.
 * !important is intentional — must override all animation declarations
 * regardless of specificity. Standard a11y pattern per WCAG 2.3.3.
 * noImportantStyles rule disabled in biome.json for this reason. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

html,
body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  color: var(--text-body);
  font-family: var(--font-sans);
}

body {
  display: flex;
  flex-direction: column;
}

/* ── Header ── */

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  flex-shrink: 0;
  animation: fade-in 0.6s ease-out;
}

header h1 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo {
  height: 26px;
  width: auto;
}

/* Color swatches used in the help dialog legend */
.swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 2px;
}
.swatch-new {
  background: var(--color-new);
}
.swatch-major {
  background: var(--color-major);
}
.swatch-minor {
  background: var(--color-minor);
}
.swatch-patch {
  background: var(--color-patch);
}

/* Controls pushed to the right of the header */
.controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 8px;
}
.volume-control label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.drone-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
}

/* Toggle switch — hides the native checkbox and draws a pill track + knob */
.drone-toggle input {
  appearance: none;
  width: 32px;
  height: 18px;
  border-radius: 9px;
  background: var(--border);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}
.drone-toggle input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-muted);
  transition:
    transform 0.2s,
    background 0.2s;
}
.drone-toggle input:checked {
  background: var(--accent);
}
.drone-toggle input:checked::after {
  transform: translateX(14px);
  background: #fff;
}

/* ── Canvas (fills remaining viewport between header and footer) ── */

main {
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* ── Footer (muted — should recede into the background) ── */

footer {
  padding: 6px 20px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-footer);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 10;
}

footer a {
  color: var(--text-faint);
  text-decoration: none;
}
footer a:hover {
  color: var(--text-muted);
  text-decoration: underline;
}

/* ── Entrance animation ── */

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── SVG circle animations ── */

.event-circle {
  animation: circle-life var(--circle-life) ease-out forwards;
}

.event-label {
  animation: label-fade var(--label-life) ease-out forwards;
  pointer-events: none;
}

/* Event log entry description text */
.log-desc {
  color: var(--text-faint);
  font-size: 0.7rem;
}

/* Log entry link colors by event type */
.log-new a {
  color: var(--log-new);
}
.log-major a {
  color: var(--log-major);
}
.log-minor a {
  color: var(--log-minor);
}
.log-patch a {
  color: var(--log-patch);
}

@keyframes circle-life {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }
  4% {
    transform: scale(1);
  }
  6% {
    opacity: 0.85;
  }
  50% {
    opacity: 0.4;
  }
  100% {
    opacity: 0;
  }
}

@keyframes label-fade {
  0% {
    opacity: 0;
  }
  6% {
    opacity: 1;
  }
  60% {
    opacity: 0.8;
  }
  100% {
    opacity: 0;
  }
}

/* New log entries slide up from below */
@keyframes log-appear {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/*
 * ── ID selectors ──
 * Ordered by ascending specificity to satisfy biome's
 * noDescendingSpecificity rule. Element/class selectors above,
 * ID selectors below.
 */

/* Help button in the header — small, unobtrusive circle with "?" */
#help-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  transition: color 0.15s;
}
#help-btn:hover {
  color: var(--accent);
}

/* Help dialog — native <dialog> styled to match the app's dark theme */
#help-dialog {
  max-width: 480px;
  margin: auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-deep);
  color: var(--text-body);
  font-family: var(--font-sans);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

#help-dialog .dialog-body {
  padding: 28px 32px;
}

/* Dim the page behind the dialog */
#help-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

#help-dialog h2 {
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

#help-dialog h3 {
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-top: 16px;
  margin-bottom: 6px;
}

#help-dialog p {
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

#help-dialog ul {
  font-size: 0.85rem;
  line-height: 1.6;
  padding-left: 20px;
  margin-bottom: 8px;
}

#help-dialog form {
  text-align: right;
  margin-top: 20px;
}

#help-dialog button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 24px;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}
#help-dialog button:hover {
  background: #5a9dcf;
}

/* Hero play button — large centered prompt shown before first start.
 * Pulses gently to draw attention. Fades out when playback begins. */
#hero-play {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 8;
  animation: fade-in 0.8s ease-out 0.3s both;
  transition: opacity 0.5s ease-out;
}

/* Exit animation is handled by the Web Animations API in app.js,
 * which calculates the exact pixel position of the header play button
 * and animates the hero toward it. */

#hero-play-btn {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: rgba(75, 139, 190, 0.1);
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-left: 6px; /* visually center the play triangle */
  transition:
    transform 0.2s,
    background 0.2s;
}

/* Pulse glow — uses opacity (compositable) instead of box-shadow */
#hero-play-btn::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(75, 139, 190, 0.25) 0%, transparent 70%);
  animation: hero-pulse 3s ease-in-out infinite;
  pointer-events: none;
}

#hero-play-btn:hover {
  transform: scale(1.08);
  background: rgba(75, 139, 190, 0.2);
}

#hero-play-btn:active {
  transform: scale(0.96);
}

.hero-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

@keyframes hero-pulse {
  0%,
  100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

/* Play / Pause icon button */
#play-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-body);
  cursor: pointer;
  transition:
    color 0.15s,
    border-color 0.15s;
}
#play-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
#play-btn:disabled {
  opacity: 0.5;
  cursor: wait;
}

#volume {
  width: 100px;
  accent-color: var(--accent);
}

/* Error status — only shown when something goes wrong */
#status {
  font-size: 0.8rem;
  color: var(--text-muted);
}

#canvas {
  width: 100%;
  height: 100%;
  display: block;
}
#canvas a {
  cursor: pointer;
}
#canvas a:hover circle {
  opacity: 0.9;
}

/* Event log overlay — anchored to bottom-left of the canvas.
 * Uses column-reverse so new entries appear at the bottom and
 * older entries scroll upward. */
#event-log {
  position: absolute;
  bottom: 40px;
  left: 12px;
  max-width: 420px;
  max-height: 260px;
  overflow: hidden;
  pointer-events: none;
  z-index: 5;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

#log-list {
  list-style: none;
  display: flex;
  flex-direction: column;
}

#log-list li {
  font-size: 0.75rem;
  padding: 2px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  animation: log-appear 0.3s ease-out;
  pointer-events: auto;
  transition: opacity 0.2s;
}

/* Fade older entries — newest (last-child) is brightest,
 * older entries at the top fade out. Hover/focus restores any entry. */
#log-list li {
  opacity: 0.45;
}
#log-list li:nth-last-child(1) {
  opacity: 0.95;
}
#log-list li:nth-last-child(2) {
  opacity: 0.85;
}
#log-list li:nth-last-child(3) {
  opacity: 0.7;
}
#log-list li:nth-last-child(4) {
  opacity: 0.6;
}
#log-list li:nth-last-child(5) {
  opacity: 0.5;
}
#log-list li:hover,
#log-list li:focus-within {
  opacity: 1;
}

#log-list li a {
  color: var(--accent);
  text-decoration: none;
}
#log-list li a:hover {
  text-decoration: underline;
}

/* Stats sit below the event log */
#stats-bar {
  display: flex;
  gap: 12px;
  font-size: 0.7rem;
  color: var(--text-faint);
  padding: 4px 0;
  margin-top: 2px;
}

/* ── Responsive ── */

@media (max-width: 600px) {
  header {
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
  }
  header h1 {
    font-size: 1rem;
  }
  .volume-control label,
  .drone-toggle span {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  #volume {
    width: 72px;
  }
  #status {
    width: 100%;
    margin-left: 0;
    font-size: 0.7rem;
  }
  footer {
    font-size: 0.7rem;
    padding: 6px 12px;
  }
  #help-dialog {
    max-width: calc(100vw - 32px);
  }
  #help-dialog .dialog-body {
    padding: 20px;
  }
  #help-dialog p,
  #help-dialog ul {
    font-size: 0.9rem;
  }
  #event-log {
    max-width: 90vw;
  }
  #log-list li {
    font-size: 0.8rem;
  }
  #stats-bar {
    font-size: 0.75rem;
  }
}