@font-face {
  font-family: "BigBlueTerm";
  src: url("fonts/BigBlueTerm437NerdFontMono-Regular.ttf") format("truetype");
  font-display: swap;
}

:root {
  --primary-color: #233c4b;
  --secondary-color: #fac846;
  --accent-color: #ff7d2d;
  --bg-color: #1a2c38;
  --card-bg: #2a4456;
  --text-color: #f5f5f5;
  --text-light: #b8c5cf;
  --border-color: #3d5a6f;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.4);
}

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

body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system,
    sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.header {
  background: #1a2c38;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-color);
}

.brand-logo {
  height: 36px;
  width: auto;
}

/* Main */
.main {
  flex: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.intro h1 {
  font-size: 1.75rem;
  color: var(--secondary-color);
  margin-bottom: 0.6rem;
}

.intro p {
  color: var(--text-light);
}

.intro strong {
  color: var(--text-color);
}

/* Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin: 1.75rem 0 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.toolbar-actions {
  display: flex;
  gap: 0.5rem;
}

.toolbar-status {
  color: var(--text-light);
  font-size: 0.9rem;
}

#count-label {
  font-weight: 600;
  color: var(--secondary-color);
}

/* Buttons */
.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, opacity 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  color: var(--text-color);
  border-color: var(--secondary-color);
}

.btn-primary {
  background: var(--secondary-color);
  color: var(--primary-color);
}

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

.btn-primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.load-error {
  background: var(--card-bg);
  border: 1px solid var(--accent-color);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  color: var(--text-light);
}

/* Feed groups */
.feed-groups {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.feed-group {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.feed-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  background: rgba(35, 60, 75, 0.45);
  border-bottom: 1px solid var(--border-color);
}

.feed-group-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--secondary-color);
}

.feed-group-toggle {
  background: none;
  border: none;
  color: var(--text-light);
  font-family: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 6px;
}

.feed-group-toggle:hover {
  color: var(--accent-color);
}

.feed-list {
  list-style: none;
}

.feed-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.1rem;
  border-top: 1px solid rgba(61, 90, 111, 0.4);
  cursor: pointer;
  transition: background 0.12s ease;
}

.feed-item:first-child {
  border-top: none;
}

.feed-item:hover {
  background: rgba(255, 125, 45, 0.06);
}

.feed-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-color);
  cursor: pointer;
  flex-shrink: 0;
}

.feed-item-text {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.feed-copy {
  flex-shrink: 0;
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.feed-copy:hover {
  color: var(--text-color);
  border-color: var(--secondary-color);
}

.feed-copy.copied {
  color: var(--primary-color);
  background: var(--secondary-color);
  border-color: var(--secondary-color);
}

.feed-name {
  font-weight: 600;
}

.feed-url {
  font-size: 0.78rem;
  color: var(--text-light);
  word-break: break-all;
}

/* Download bar */
.download-bar {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.download-bar .btn-primary {
  font-size: 1.05rem;
  padding: 0.8rem 2rem;
}

.hint {
  color: var(--text-light);
  font-size: 0.85rem;
}

@media (max-width: 560px) {
  .intro h1 {
    font-size: 1.45rem;
  }
}