/* ============================================================
   CSS VARIABLES
   ============================================================ */
:root {
  --color-light: #f3f4f6;
  --color-dark: #212121;
  --color-white: #ffffff;
  --color-black: #000000;

  --background-color: var(--color-light);
  --border-color: var(--color-dark);
  --content-color: var(--color-white);
  --text-color: var(--color-dark);

  --green-color: #28a745;
  --yellow-color: #ffc107;
  --red-color: #dc3545;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background-color: var(--color-dark);
    --border-color: var(--color-light);
    --content-color: var(--color-black);
    --text-color: var(--color-light);
  }

  header > img {
    filter: brightness(0) invert(1);
  }
}

/* ============================================================
   RESET
   ============================================================ */
* {
  margin: 0;
  box-sizing: border-box;
}

/* ============================================================
   BASE ELEMENTS
   ============================================================ */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
}

img {
  background-color: transparent;
  border-radius: 8px;
}

a {
  color: var(--text-color);
  text-decoration: none;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}

a:hover {
  border-color: transparent;
}

button {
  all: unset;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s;
}

button:hover {
  background-color: var(--hover-bg, var(--content-color));
  color: var(--hover-color, inherit);
}

button:disabled {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--border-color);
  outline-offset: 2px;
}

p, ul, li {
  margin-top: 8px;
  line-height: 1.5;
}

h1 {
  margin-top: 8px;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.wrapper {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
  padding: 32px 0;
}

header, main, footer {
  display: flex;
  gap: 32px;
  padding: 16px;
}

main, main > header {
  flex-direction: column;
}

main > header {
  padding: 16px 0;
  gap: 0;
}

footer {
  flex-direction: column;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

/* ============================================================
   DEMO LAYOUT
   ============================================================ */
.demo {
  display: flex;
  gap: 64px;
}

@media (max-width: 600px) {
  .demo {
    flex-direction: column;
    align-items: center;
  }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  white-space: nowrap;
}

/* Control buttons */
.controls .btn {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-color);
  background-color: transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.controls .btn:hover:not(:disabled) {
  background-color: var(--content-color);
  color: var(--text-color);
}

/* URL list buttons */
.url-list li .btn {
  height: 40px;
  padding: 0 4px;
  font-size: 14px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.url-list li .btn-url {
  flex: 1 1 0%;
  min-width: 0;
  padding: 0 8px;
  display: block;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-color);
  background-color: var(--content-color);
  line-height: 40px;
}

.url-list li .btn-url:focus-visible {
  outline: none;
  border-color: var(--border-color);
  box-shadow: 0 0 0 2px var(--background-color), 0 0 0 4px var(--border-color);
}

.url-list li .btn-delete {
  width: 32px;
  justify-content: center;
  font-weight: 700;
  color: var(--color-white);
  background-color: var(--red-color);
}

.url-list li .btn-delete:focus-visible {
  outline: none;
  background-color: var(--red-color);
  color: var(--color-white);
  box-shadow: 0 0 0 2px var(--background-color), 0 0 0 4px var(--red-color);
}

/* ============================================================
   MINI RADIO PLAYER
   ============================================================ */
.mini-radio {
  display: grid;
  grid-template-areas:
      "image title button"
      "image description button";
  grid-template-columns: 64px 128px 64px;
  gap: 0 8px;
  padding: 4px;
  background-color: var(--content-color);
  border-radius: 8px;
}

.mini-radio__image {
  grid-area: image;
  width: 64px;
  height: 64px;
  border-radius: 4px;
}

.mini-radio__title {
  grid-area: title;
  width: 128px;
  margin-top: 8px;
  font-size: 16px;
  line-height: 24px;
  font-weight: 600;
}

.mini-radio__description {
  grid-area: description;
  width: 128px;
  margin: 0 0 16px 0;
  font-size: 12px;
  line-height: 16px;
  opacity: 0.8;
}

.mini-radio__play {
  grid-area: button;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-left: auto;
  padding: 0;
  position: relative;
}

.mini-radio__play:hover {
  background-color: var(--background-color);
}

.mini-radio__play::before,
.mini-radio__play::after {
  position: absolute;
  background-color: var(--border-color);
  content: '';
}

/* Play state */
.mini-radio__play--play::before {
  width: 0;
  height: 0;
  background-color: transparent;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 14px solid var(--border-color);
}

/* Pause state */
.mini-radio__play--pause::before,
.mini-radio__play--pause::after {
  top: 24px;
  width: 5px;
  height: 16px;
  border: none;
}

.mini-radio__play--pause::before { left: 25px; }
.mini-radio__play--pause::after { right: 25px; }

/* Loading state */
.mini-radio__play--loading { --offset: 4px; }

.mini-radio__play--loading::before,
.mini-radio__play--loading::after {
  width: 8px;
  height: 8px;
  animation: spinDot 1s steps(4, end) infinite;
}

.mini-radio__play--loading::after { animation-delay: -0.5s; }

@keyframes spinDot {
  0%   { transform: translate(var(--offset), var(--offset)); }
  25%  { transform: translate(calc(var(--offset) * -1), var(--offset)); }
  50%  { transform: translate(calc(var(--offset) * -1), calc(var(--offset) * -1)); }
  75%  { transform: translate(var(--offset), calc(var(--offset) * -1)); }
  100% { transform: translate(var(--offset), var(--offset)); }
}

/* ============================================================
   PLAYER
   ============================================================ */
.player {
  display: flex;
  flex-direction: column;
  gap: 32px;
  width: 280px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  color: var(--text-color);
  background-color: var(--content-color);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.badge.ok,
.badge.bad,
.badge.loading {
  color: var(--color-black);
}

.badge.ok { background-color: var(--green-color); }
.badge.bad { background-color: var(--red-color); }
.badge.loading { background-color: var(--yellow-color); }

/* ============================================================
   STREAM HISTORY
   ============================================================ */
.stream-history {
  flex: 1;
  min-width: 0;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#urlInput {
  width: 100%;
  height: 40px;
  padding: 8px;
  font-size: 13px;
  color: var(--text-color);
  background-color: var(--color-white);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#urlInput::placeholder {
  opacity: 0.6;
}

.msg {
  margin: 0;
  font-size: 12px;
  line-height: 16px;
}

.url-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.url-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  max-width: 100%;
}

/* ============================================================
   UTILITIES
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}