:root {
  --bg: #07111f;
  --panel: rgba(10, 22, 39, 0.9);
  --panel-border: rgba(163, 196, 243, 0.14);
  --text: #e8f1ff;
  --muted: #93a7c4;
  --accent: #ffb347;
  --accent-strong: #ff8c42;
  --danger: #ff7b72;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(255, 179, 71, 0.18), transparent 28%),
    radial-gradient(circle at bottom left, rgba(74, 144, 226, 0.22), transparent 24%),
    linear-gradient(160deg, #030913, #091a2d 55%, #06101d);
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
  padding: 24px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.sidebar,
.content {
  display: grid;
  gap: 20px;
  align-content: start;
}

.sidebar .panel,
.player-card,
.toolbar {
  padding: 20px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 2rem;
}

p,
small {
  color: var(--muted);
}

.source-form {
  display: grid;
  gap: 16px;
}

.form-grid,
.form-row {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(163, 196, 243, 0.14);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(4, 11, 21, 0.75);
  color: var(--text);
}

textarea {
  resize: vertical;
}

button {
  border: 0;
  cursor: pointer;
}

.primary {
  padding: 14px 16px;
  border-radius: 16px;
  color: #09111d;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-weight: 700;
}

.source-list,
.group-list,
.channel-grid {
  display: grid;
  gap: 12px;
}

.source-item,
.channel-item,
.group-pill {
  width: 100%;
  text-align: left;
  background: rgba(7, 17, 31, 0.72);
  border: 1px solid transparent;
  color: var(--text);
  border-radius: 18px;
}

.source-item {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 16px;
}

.source-item.active,
.channel-item.active,
.group-pill.active {
  border-color: rgba(255, 179, 71, 0.7);
  box-shadow: inset 0 0 0 1px rgba(255, 179, 71, 0.3);
}

.source-remove {
  position: absolute;
  top: 14px;
  right: 16px;
  color: var(--danger);
  font-size: 0.85rem;
}

.player-card {
  display: grid;
  gap: 16px;
}

.player-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.status {
  align-self: start;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 179, 71, 0.12);
  color: var(--accent);
}

.status[data-error="true"] {
  background: rgba(255, 123, 114, 0.12);
  color: var(--danger);
}

video {
  width: 100%;
  min-height: 420px;
  border-radius: 20px;
  background: #000;
}

.toolbar {
  display: grid;
  gap: 16px;
}

.group-list {
  grid-template-columns: repeat(auto-fit, minmax(120px, max-content));
}

.group-pill {
  padding: 10px 14px;
}

.channel-grid {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.channel-item {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px;
}

.channel-item img {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.05);
}

.channel-item span {
  display: grid;
  gap: 4px;
}

.empty-state {
  text-align: center;
  padding: 24px;
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 14px;
  }

  .player-header {
    flex-direction: column;
  }

  video {
    min-height: 260px;
  }
}