/* ===== Design Tokens ===== */
:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #1e2130;
  --bg-filter: #12151e;
  --border: #2a2d3a;
  --border-light: #343747;
  --text-primary: #f0f2f8;
  --text-secondary: #8b90a7;
  --text-muted: #5a5f75;
  --accent: #4ade80;
  --accent-dim: rgba(74, 222, 128, 0.12);
  --accent-hover: #22c55e;
  --chip-bg: #1e2130;
  --chip-active-bg: #4ade80;
  --chip-active-text: #0a0f0d;
  --skeleton: #1e2130;
  --skeleton-shine: #252838;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
  --radius: 14px;
  --radius-sm: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="light"] {
  --bg: #f3f4f8;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9fc;
  --bg-filter: #eaecf2;
  --border: #e2e4ed;
  --border-light: #d0d3e0;
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  --accent: #16a34a;
  --accent-dim: rgba(22, 163, 74, 0.1);
  --accent-hover: #15803d;
  --chip-bg: #e8eaf0;
  --chip-active-bg: #16a34a;
  --chip-active-text: #ffffff;
  --skeleton: #e5e7ef;
  --skeleton-shine: #d1d5e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  transition: background 0.2s, color 0.2s;
}

a { color: inherit; text-decoration: none; }

/* ===== Sticky stack wrapper ===== */
#sticky-stack {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

/* ===== Header ===== */
.header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  font-size: 28px;
  line-height: 1;
  filter: drop-shadow(0 0 8px rgba(74, 222, 128, 0.5));
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.brand-tld {
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.1s;
}

.icon-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.icon-btn:active { transform: scale(0.93); }

.icon-btn.spinning svg {
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Filter Bar ===== */
.filter-bar {
  background: var(--bg-filter);
  border-bottom: 1px solid var(--border);
}

.filter-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.filter-inner::-webkit-scrollbar { display: none; }

.filter-chip {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 5px 14px;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  font-family: var(--font);
}

.filter-chip:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.filter-chip.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-text);
  border-color: transparent;
  font-weight: 600;
}

/* ===== Controls Bar ===== */
.controls-bar {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.controls-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 8px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.controls-inner::-webkit-scrollbar { display: none; }

.controls-inner--focus {
  padding-top: 6px;
  padding-bottom: 8px;
  border-top: 1px solid var(--border);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.control-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 2px;
  white-space: nowrap;
}

.ctrl-btn {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 4px 11px;
  border-radius: 99px;
  font-size: 0.76rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  font-family: var(--font);
}

.ctrl-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.ctrl-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}

.control-sep {
  width: 1px;
  height: 18px;
  background: var(--border);
  flex-shrink: 0;
  margin: 0 4px;
}

/* ===== Main Feed ===== */
.main {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 16px 80px;
  /* padding-top is set dynamically by JS based on #sticky-stack height */
}

.feed {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ===== Article Card ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  animation: fadeInUp 0.4s ease both;
  text-decoration: none;
  display: block;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card:active { transform: translateY(0); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* stagger */
.card:nth-child(1)  { animation-delay: 0.02s; }
.card:nth-child(2)  { animation-delay: 0.05s; }
.card:nth-child(3)  { animation-delay: 0.08s; }
.card:nth-child(4)  { animation-delay: 0.11s; }
.card:nth-child(5)  { animation-delay: 0.14s; }
.card:nth-child(6)  { animation-delay: 0.17s; }
.card:nth-child(7)  { animation-delay: 0.20s; }
.card:nth-child(8)  { animation-delay: 0.23s; }
.card:nth-child(9)  { animation-delay: 0.26s; }
.card:nth-child(10) { animation-delay: 0.29s; }

.card-body { padding: 16px 18px 0; }

/* Card header row */
.card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.source-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  overflow: hidden;
}

.source-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.source-info {
  flex: 1;
  min-width: 0;
}

.source-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.source-time {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.category-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Card title */
.card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Card image */
.card-image {
  width: 100%;
  aspect-ratio: 16 / 8;
  object-fit: cover;
  display: block;
  margin: 12px 0 0;
  background: var(--skeleton);
}

/* Card description */
.card-desc {
  padding: 12px 18px 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Card footer */
.card-footer {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 18px 14px;
  margin-top: 8px;
  border-top: 1px solid var(--border);
}

.read-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-action {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-family: var(--font);
}

.card-action:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

.card-action.bookmarked {
  color: var(--accent);
}

.card-open-btn {
  background: var(--accent-dim);
  border: 1px solid transparent;
  color: var(--accent);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font);
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: 4px;
}

.card-open-btn:hover {
  background: var(--accent);
  color: var(--chip-active-text);
}

/* ===== Skeleton Loader ===== */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sk {
  background: var(--skeleton);
  border-radius: 6px;
  animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-color: var(--skeleton); }
  50%       { background-color: var(--skeleton-shine); }
}

.sk-header { height: 34px; width: 55%; border-radius: 99px; }
.sk-title   { height: 18px; width: 95%; }
.sk-title.short { width: 70%; }
.sk-img     { height: 140px; width: 100%; border-radius: 10px; }
.sk-text    { height: 13px; width: 90%; }
.sk-text.short { width: 60%; }
.sk-footer  { height: 13px; width: 40%; margin-top: 4px; }

/* ===== Error / Empty State ===== */
.error-state {
  text-align: center;
  padding: 60px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.error-icon { font-size: 3rem; }

.error-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.error-msg {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 320px;
  line-height: 1.6;
}

.retry-btn {
  background: var(--accent);
  color: var(--chip-active-text);
  border: none;
  padding: 9px 22px;
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  margin-top: 8px;
  transition: opacity 0.15s;
}

.retry-btn:hover { opacity: 0.85; }

/* ===== Info Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 300;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px 40px;
  overflow-y: auto;
  animation: fadeIn 0.18s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  width: 100%;
  max-width: 560px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.22s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.modal-close {
  background: var(--chip-bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}

.modal-close:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.modal-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.info-section { display: flex; flex-direction: column; gap: 8px; }

.info-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.info-section p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.info-section p strong { color: var(--text-primary); }

.info-section a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-left: 4px;
}

.info-list li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1.5;
}

.info-list li::before {
  content: '–';
  color: var(--accent);
  flex-shrink: 0;
  font-weight: 700;
}

.info-list li strong { color: var(--text-primary); }

.info-code {
  font-family: 'SF Mono', 'Fira Code', 'Menlo', monospace !important;
  font-size: 0.78rem !important;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px !important;
  color: var(--accent) !important;
  line-height: 1.5 !important;
  word-break: break-word;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Menlo', monospace;
  font-size: 0.78em;
  background: var(--chip-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--accent);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-primary);
  color: var(--bg);
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
  z-index: 200;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Footer ===== */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 10px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  z-index: 90;
}

.footer a { color: var(--accent); }
.footer a:hover { text-decoration: underline; }

.bmc-link {
  color: var(--text-muted) !important;
  transition: color 0.15s;
}
.bmc-link:hover {
  color: #f59e0b !important;
  text-decoration: none !important;
}
.footer-sep { opacity: 0.4; }

kbd {
  background: var(--chip-bg);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.7rem;
  font-family: var(--font);
}

/* ===== Editor Mode ===== */

/* Banner */
#editor-banner {
  background: #7c3aed;
  border-bottom: 1px solid #6d28d9;
}

.editor-banner-inner {
  max-width: 680px;
  margin: 0 auto;
  padding: 8px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.editor-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.editor-counts {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.75);
  margin-right: auto;
}

.editor-banner-btn {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s;
}

.editor-banner-btn:hover {
  background: rgba(255,255,255,0.25);
}

.editor-banner-btn--exit {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
}

/* Card — pinned state */
.card--pinned {
  border-color: #7c3aed;
  box-shadow: 0 0 0 1px #7c3aed;
}

.pinned-bar {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #7c3aed;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

[data-theme="light"] .pinned-bar { color: #6d28d9; }
[data-theme="light"] .card--pinned { border-color: #6d28d9; box-shadow: 0 0 0 1px #6d28d9; }

.pinned-note {
  font-style: italic;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Editor toolbar on cards */
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px 10px;
  border-top: 1px solid var(--border);
  background: rgba(124, 58, 237, 0.06);
}

.editor-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.editor-pin-btn {
  background: rgba(124, 58, 237, 0.12);
  color: #7c3aed;
  border-color: rgba(124, 58, 237, 0.3);
}

.editor-pin-btn:hover {
  background: #7c3aed;
  color: #fff;
  border-color: #7c3aed;
}

.editor-hide-btn {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.25);
}

.editor-hide-btn:hover {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
}

.editor-unpin-btn {
  background: rgba(107, 114, 128, 0.12);
  color: var(--text-secondary);
  border-color: var(--border);
}

.editor-unpin-btn:hover {
  background: var(--border-light);
}

.editor-unhide-btn {
  background: rgba(74, 222, 128, 0.1);
  color: var(--accent);
  border-color: rgba(74, 222, 128, 0.25);
}

.editor-unhide-btn:hover {
  background: var(--accent-dim);
}

/* Card hide animation */
.card--removing {
  opacity: 0;
  transform: scale(0.97);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

/* Editor login modal */
.editor-login-modal { max-width: 400px; }

.editor-token-input {
  width: 100%;
  background: var(--chip-bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.875rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s;
}

.editor-token-input:focus {
  border-color: #7c3aed;
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.editor-login-error {
  font-size: 0.8rem;
  color: #ef4444;
  margin: 0;
}

/* Manage panel rows */
.manage-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.manage-row:last-child { border-bottom: none; }

.manage-row-info { flex: 1; min-width: 0; }

.manage-row-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.manage-row-url {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.manage-row-meta {
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Responsive ===== */
@media (max-width: 520px) {
  .brand-sub { display: none; }
  .card-title { font-size: 0.95rem; }
  .header-inner { padding: 12px 14px; }
  .filter-inner { padding: 8px 14px; }
  .controls-inner { padding: 6px 14px; }
  .main { padding-left: 10px; padding-right: 10px; padding-bottom: 80px; }
}