/* ── River layout ── */
.river-main {
  margin-top: var(--header-height);
  padding: 32px 20px 80px;
  display: flex;
  justify-content: center;
  background: #1a2433;
  min-height: calc(100vh - var(--header-height));
}

.river-stream {
  width: 100%;
  max-width: 660px;
}

/* ── River mode tabs ── */
.river-modes {
  display: flex;
  align-items: center;
  gap: 2px;
}

.river-mode-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--header-control-height);
  padding: 0 10px;
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  font-size: var(--header-control-font-size);
  border: 2px solid transparent;
  box-sizing: border-box;
  transition: color 0.15s ease;
}

.river-mode-link:hover {
  color: var(--color-text);
}

.river-mode-link.active {
  color: #fff;
  border-bottom: 2px solid var(--color-accent);
  background: none;
}

/* Override dropdown-link styles for Topics button inside river-modes */
.river-modes .dropdown-container {
  display: inline-flex;
}

.river-modes .dropdown-container > button.river-mode-link {
  background: none;
  border: 2px solid transparent;
  border-bottom-color: transparent;
  padding: 0 10px;
  cursor: pointer;
  font-family: inherit;
}

.river-modes .dropdown-container > button.river-mode-link:hover {
  color: var(--color-text);
  background: none;
  border: 2px solid transparent;
}

.river-modes .dropdown-container > button.river-mode-link.active {
  color: #fff;
  border: 2px solid transparent;
  border-bottom: 2px solid var(--color-accent);
  background: none;
}

.river-modes-sep {
  display: inline-block;
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.15);
  margin: 0 6px;
  vertical-align: middle;
}

/* ── Header left ── */
.river-back-link {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.5);
  margin-right: 10px;
}

.river-back-link:hover {
  color: #fff;
}

.river-title {
  font-size: var(--header-control-font-size);
  color: var(--color-text);
  white-space: nowrap;
}

/* ── Cards ── */
.river-card {
  display: block;
  padding: 22px 24px;
  margin-bottom: 2px;
  background: rgba(255, 255, 255, 0.025);
  border-left: 3px solid transparent;
  border-radius: 2px;
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.15s ease, border-left-color 0.15s ease;
}

.river-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--color-accent);
}

.river-card-link {
  text-decoration: none;
  color: inherit;
}

.river-card:focus-within {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
}

/* ── Title ── */
.river-card-title {
  margin: 0 0 6px;
  font-size: 21px;
  font-weight: 400;
  line-height: 1.35;
  color: #fff;
}

.river-card:hover .river-card-title {
  color: #fff;
}

/* ── Meta line ── */
.river-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 7px;
  font-size: 14px;
  color: #607080;
  margin-bottom: 10px;
}

.river-card-sep {
  color: #3d4f5f;
}

.river-card-domain {
  color: #7a8d9e;
}

.river-card-date {
  color: #607080;
}

.river-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 13px;
  color: #7a8d9e;
  background: rgba(255, 255, 255, 0.045);
  padding: 2px 8px;
  border-radius: 2px;
}

/* ── Feed icon ── */
.river-card-feed {
  display: inline-flex;
  align-items: center;
  color: #607080;
  transition: color 0.15s ease;
}

.river-card-feed:hover {
  color: #f5a623;
}

/* ── Excerpt ── */
.river-card-excerpt {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 14.5px;
  line-height: 1.75;
  color: #a0aebb;
  letter-spacing: 0.005em;
}

/* ── Load more ── */
.river-load-more {
  padding: 36px 0;
  text-align: center;
}

.river-load-btn {
  display: inline-block;
  padding: 12px 36px;
  font-size: 18px;
  border: 2px solid transparent;
  border-color: var(--color-bg);
  border-right-color: var(--color-text);
  border-bottom-color: var(--color-text);
  transition: background-color 0.12s ease, transform 0.12s ease;
}

.river-load-btn:hover {
  transform: translate(1px, 1px);
  border-top-color: var(--color-text);
  border-left-color: var(--color-text);
  border-right-color: var(--color-bg);
  border-bottom-color: var(--color-bg);
}

/* ── Empty / end states ── */
.river-empty,
.river-end {
  padding: 64px 0;
  text-align: center;
  color: #506070;
  font-size: 18px;
}

/* ── Topic dropdown selected state ── */
.river-topics-dropdown .share-option.selected {
  background: var(--color-accent-light);
}

/* ── Light mode (toggled via header-dark-mode.js injecting #global-dark-mode-style) ── */
html:has(#global-dark-mode-style) .river-main {
  background: #f4f1ec;
}

html:has(#global-dark-mode-style) .river-card {
  background: #fff;
  border-left-color: transparent;
}

html:has(#global-dark-mode-style) .river-card:hover {
  background: #fff;
  border-left-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

html:has(#global-dark-mode-style) .river-card-title {
  color: #1a1a2e;
}

html:has(#global-dark-mode-style) .river-card:hover .river-card-title {
  color: #1a1a2e;
}

html:has(#global-dark-mode-style) .river-card-excerpt {
  color: #555e6a;
}

html:has(#global-dark-mode-style) .river-card-meta {
  color: #8a919a;
}

html:has(#global-dark-mode-style) .river-card-sep {
  color: #c0c5cb;
}

html:has(#global-dark-mode-style) .river-card-domain {
  color: #6a7580;
}

html:has(#global-dark-mode-style) .river-card-date {
  color: #8a919a;
}

html:has(#global-dark-mode-style) .river-card-badge {
  color: #6a7580;
  background: rgba(0, 0, 0, 0.05);
}

html:has(#global-dark-mode-style) .river-card-feed {
  color: #8a919a;
}

html:has(#global-dark-mode-style) .river-modes-sep {
  background: rgba(0, 0, 0, 0.15);
}

html:has(#global-dark-mode-style) .river-load-btn {
  background: #fff;
  color: #1a1a2e;
}

html:has(#global-dark-mode-style) .river-empty,
html:has(#global-dark-mode-style) .river-end {
  color: #8a919a;
}

/* ── Responsive ── */
@media (max-width: 800px) {
  .river-main {
    padding: 20px 8px 48px;
  }

  .right > .badge-link {
    display: none;
  }

  .river-card {
    padding: 18px 16px;
  }

  .river-card-title {
    font-size: 19px;
  }

  .river-card-excerpt {
    font-size: 14px;
  }
}

@media (max-width: 600px) {
  .river-modes {
    gap: 0;
  }

  .river-mode-link {
    padding: 0 6px;
    font-size: 16px;
  }

  .right > #dark-mode-toggle {
    display: none;
  }

  .river-card {
    padding: 16px 14px;
  }
}