:root {
  /* Palette */
  --bg-0: #0a0a0f;
  --bg-1: #0e0e16;
  --bg-2: #12121c;
  --bg-3: #181826;
  --bg-elev: #1a1a28;
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(0, 212, 255, 0.35);

  --text-0: #f5f6fa;
  --text-1: #c2c5d0;
  --text-2: #8a8d9b;
  --text-3: #5c5f6e;

  --accent: #00d4ff;
  --accent-soft: rgba(0, 212, 255, 0.12);
  --accent-glow: rgba(0, 212, 255, 0.35);
  --accent-2: #8b5cf6;

  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --info: #60a5fa;

  --green: #34d399;
  --blue: #60a5fa;
  --purple: #a78bfa;
  --amber: #fbbf24;
  --red: #f87171;
  --gray: #8a8d9b;
  --pink: #f472b6;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;

  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-2: 0 8px 28px rgba(0, 0, 0, 0.35);

  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  --maxw: 1200px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  font-family: var(--font);
  background: var(--bg-0);
  background-image:
    radial-gradient(900px 480px at 82% -8%, rgba(139, 92, 246, 0.07), transparent 70%),
    radial-gradient(820px 460px at 12% -4%, rgba(0, 212, 255, 0.06), transparent 70%);
  color: var(--text-1);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  display: flex;
  flex-direction: column;
}

h1 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }
button { font-family: inherit; }
[hidden], .hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0;
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  filter: drop-shadow(0 0 10px var(--accent-glow));
}
.logo img { display: block; width: 100%; height: 100%; }

.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text h1 { font-size: 17px; color: var(--text-0); }
.brand-sub {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: 4px;
  font-weight: 600;
}

.header-stats { display: flex; gap: 8px; flex-wrap: wrap; }
.stat-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  transition: border-color .2s, transform .2s;
}
.stat-pill:hover { border-color: var(--border-strong); }
.stat-pill .stat-ico { font-size: 12px; opacity: 0.7; }
.stat-pill .stat-label { color: var(--text-3); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; }
.stat-pill .stat-value { color: var(--text-0); font-weight: 600; font-variant-numeric: tabular-nums; min-width: 1ch; }
.stat-pill.download .stat-ico { color: var(--accent); }
.stat-pill.upload .stat-ico { color: var(--ok); }

/* ---------- Container / Toolbar ---------- */
.container {
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: 24px 24px 48px;
  flex: 1;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.filter-input {
  flex: 1 1 220px;
  min-width: 180px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-0);
  font-size: 14px;
  outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.filter-input::placeholder { color: var(--text-3); }
.filter-input:focus {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--bg-3);
}

.sort-group { display: flex; gap: 4px; background: var(--bg-2); padding: 4px; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.sort-btn {
  background: transparent;
  border: none;
  color: var(--text-2);
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.sort-btn:hover { color: var(--text-0); }
.sort-btn.active { color: var(--bg-0); background: var(--accent); }

.toolbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.interval-control { display: inline-flex; align-items: center; }
.refresh-select {
  color-scheme: dark;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  outline: none;
  padding: 7px 9px;
  transition: border-color .2s, box-shadow .2s, background .2s, color .2s;
}
.refresh-select:hover {
  border-color: var(--border-strong);
  color: var(--text-0);
}
.refresh-select:focus {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--bg-3);
}
.refresh-indicator {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  color: var(--text-3);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}
.refresh-indicator .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
  animation: heartbeat 1.6s ease-in-out infinite;
}
@keyframes heartbeat {
  0%, 28%, 70%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.28); opacity: 0.82; }
  14% { transform: scale(1.35); box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); opacity: 1; }
  42% { transform: scale(1.18); box-shadow: 0 0 0 4px rgba(52, 211, 153, 0); opacity: 0.95; }
}
.refresh-indicator.syncing .dot { background: var(--accent); animation: heartbeat-sync .7s ease-in-out infinite; }
@keyframes heartbeat-sync {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); opacity: 0.82; }
  45% { transform: scale(1.35); box-shadow: 0 0 0 5px rgba(0, 212, 255, 0); opacity: 1; }
}

/* ---------- Torrent list / cards ---------- */
.torrent-list { display: flex; flex-direction: column; gap: 10px; }

.card {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card.is-new { animation: cardIn .35s cubic-bezier(0.16, 1, 0.3, 1) both; }
@keyframes cardIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-2); transform: translateY(-1px); }
.card.is-error { border-color: rgba(248, 113, 113, 0.3); }
.card.is-error::before {
  content: ""; position: absolute; left: 0; top: 14px; bottom: 14px; width: 3px;
  background: var(--red); border-radius: 3px;
}

.card-top {
  display: flex; align-items: flex-start; gap: 12px;
  margin-bottom: 12px;
}
.favicon {
  width: 30px; height: 30px; flex: 0 0 30px;
  border-radius: 8px;
  background: var(--bg-3);
  display: grid; place-items: center;
  color: var(--accent);
  font-weight: 700; font-size: 13px;
  border: 1px solid var(--border);
  text-transform: uppercase;
}
.card-body { flex: 1; min-width: 0; }
.card-name {
  font-size: 14px; font-weight: 600; color: var(--text-0);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  letter-spacing: -0.01em;
}
.card-meta {
  display: flex; flex-wrap: wrap; gap: 4px 14px;
  margin-top: 4px;
  font-size: 12px; color: var(--text-2);
  font-variant-numeric: tabular-nums;
}
.meta-item { display: inline-flex; align-items: center; gap: 5px; }
.meta-item .ico { font-size: 11px; opacity: 0.8; }
.meta-item.down .icon-color { color: var(--accent); }
.meta-item.up .icon-color { color: var(--ok); }
.meta-label { color: var(--text-3); }

.card-status-col { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }
.pct {
  font-size: 13px; font-weight: 700; color: var(--text-0);
  font-variant-numeric: tabular-nums; min-width: 44px; text-align: right;
}
.card-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.action-btn {
  position: relative;
  margin-left: 6px;
  min-width: 78px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--bg-3);
  color: var(--text-1);
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 11px;
  text-transform: uppercase;
  transition: background .15s, border-color .15s, color .15s, transform .15s, opacity .15s;
}
.action-btn::before {
  content: "";
  position: absolute;
  left: -11px;
  top: 50%;
  width: 1px;
  height: 24px;
  background: var(--border-strong);
  transform: translateY(-50%);
  pointer-events: none;
}
.action-btn:hover:not(:disabled) {
  border-color: var(--border-hover);
  color: var(--text-0);
  transform: translateY(-1px);
}
.action-btn.pause { color: var(--warn); background: rgba(251, 191, 36, 0.08); border-color: rgba(251, 191, 36, 0.22); }
.action-btn.resume { color: var(--accent); background: var(--accent-soft); border-color: rgba(0, 212, 255, 0.24); }
.action-btn:disabled {
  cursor: wait;
  opacity: 0.62;
  transform: none;
}

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge .dotb { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.downloading { color: var(--accent); background: rgba(0, 212, 255, 0.1); border-color: rgba(0, 212, 255, 0.25); }
.badge.seeding    { color: var(--green); background: rgba(52, 211, 153, 0.1); border-color: rgba(52, 211, 153, 0.25); }
.badge.paused     { color: var(--gray);  background: rgba(138, 141, 155, 0.1); border-color: rgba(138, 141, 155, 0.22); }
.badge.finished    { color: var(--purple); background: rgba(139, 92, 246, 0.12); border-color: rgba(139, 92, 246, 0.28); }
.badge.idle       { color: var(--text-2); background: var(--bg-3); border-color: var(--border); }
.badge.error      { color: var(--red); background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.3); }
.badge.checking   { color: var(--warn); background: rgba(251, 191, 36, 0.12); border-color: rgba(251, 191, 36, 0.3); }
.badge.queued     { color: var(--info); background: rgba(96, 165, 250, 0.12); border-color: rgba(96, 165, 250, 0.28); }

/* Progress bar */
.progress-wrap {
  margin: 4px 0 10px;
  height: 6px;
  background: var(--bg-3);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.progress-bar {
  height: 100%;
  border-radius: 999px;
  transition: width .6s cubic-bezier(0.22, 1, 0.36, 1);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 8px var(--accent-glow);
  position: relative;
}
.progress-bar.done { background: linear-gradient(90deg, var(--green), var(--accent-2)); }
.progress-bar.error { background: var(--red); box-shadow: none; }
.progress-bar::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  transform: translateX(-100%);
  animation: shimmer 2.2s infinite;
}
@keyframes shimmer { 100% { transform: translateX(100%); } }
.progress-bar.done::after, .progress-bar.error::after, .progress-bar.paused::after { animation: none; }

.card-bottom {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px 16px;
  font-size: 12px;
}
.stat-cell { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.stat-cell .k {
  color: var(--text-3);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
}
.stat-cell .v {
  color: var(--text-1);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.stat-cell .v.mono { font-family: var(--mono); font-size: 11.5px; }
.stat-cell .v.success { color: var(--green); }
.stat-cell .v.accent { color: var(--accent); }
.stat-cell .v.warn { color: var(--warn); }
.stat-cell .v.dim { color: var(--text-3); }

.error-string {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: 8px;
  color: #fca5a5;
  font-size: 12px;
}
.action-error {
  margin-top: 10px;
  padding: 8px 12px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: 8px;
  color: #fca5a5;
  font-size: 12px;
}

/* ---------- Empty / error states ---------- */
.empty-state, .error-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-2);
}
.empty-box {
  width: 72px; margin: 0 auto 18px; color: var(--accent); opacity: 0.5;
}
.empty-box svg { width: 100%; }
.empty-title { font-size: 16px; font-weight: 600; color: var(--text-1); margin: 0 0 4px; }
.empty-sub { font-size: 13px; color: var(--text-3); margin: 0; }

.error-state .error-title { font-size: 16px; font-weight: 600; color: var(--red); margin: 0 0 6px; }
.error-state .error-sub { font-size: 13px; color: var(--text-2); margin: 0 0 8px; }
.error-state .error-hint { font-size: 12px; color: var(--text-3); margin: 0; }

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  padding: 18px 24px 28px;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}
.footer-sep { margin: 0 8px; opacity: 0.5; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .header-inner { flex-wrap: wrap; padding: 12px 16px; gap: 12px; }
  .header-stats { width: 100%; }
  .stat-pill { padding: 5px 10px; font-size: 12px; }
  .container { padding: 16px 14px 36px; }
  .toolbar { gap: 8px; }
  .toolbar-actions { margin-left: 0; width: 100%; justify-content: flex-end; }
  .sort-group { width: 100%; overflow-x: auto; }
  .card { padding: 14px; }
  .card-top { align-items: flex-start; }
  .card-actions { flex-direction: column; align-items: flex-end; gap: 7px; }
  .card-bottom { grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); }
  .pct { min-width: 40px; }
}
@media (max-width: 440px) {
  .brand-text h1 { font-size: 15px; }
  .stat-pill .stat-label { display: none; }
  .card-top { flex-wrap: wrap; }
  .card-body { flex-basis: calc(100% - 42px); }
  .card-actions { width: 100%; flex-direction: row; justify-content: space-between; }
  .card-status-col { flex-direction: column-reverse; align-items: flex-start; gap: 6px; }
}