.m3u8tk {
  margin: 24px 0;
  padding: 24px;
  border: 1px solid rgba(15, 23, 42, 0.09);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.06);
  color: #0f172a;
}

.m3u8tk * { box-sizing: border-box; }

.m3u8tk-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.m3u8tk-head h2 {
  margin: 5px 0 6px;
  font-size: clamp(1.45rem, 2vw, 2rem);
  line-height: 1.18;
}

.m3u8tk-head p {
  margin: 0;
  max-width: 780px;
  color: #64748b;
  font-size: 0.98rem;
  line-height: 1.65;
}

.m3u8tk-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #2563eb;
  font-weight: 750;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-size: .74rem;
}

.m3u8tk-badge {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(37, 99, 235, 0.08);
  color: #1d4ed8;
  border-radius: 999px;
  padding: 7px 11px;
  font-size: .82rem;
  font-weight: 700;
}

.m3u8tk-input-row,
.m3u8tk-playlist-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin: 16px 0;
}

.m3u8tk-playlist-form {
  grid-template-columns: minmax(140px, 0.35fr) minmax(180px, 1fr) auto;
}

.m3u8tk input,
.m3u8tk textarea {
  width: 100%;
  border: 1px solid rgba(100, 116, 139, 0.24);
  border-radius: 14px;
  padding: 12px 14px;
  background: #fff;
  color: #0f172a;
  outline: none;
  font: inherit;
}

.m3u8tk textarea {
  resize: vertical;
  min-height: 150px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .88rem;
}

.m3u8tk input:focus,
.m3u8tk textarea:focus {
  border-color: rgba(37, 99, 235, .7);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
}

.m3u8tk-btn,
.m3u8tk-file-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(100, 116, 139, 0.22);
  border-radius: 14px;
  padding: 11px 14px;
  background: #fff;
  color: #0f172a;
  cursor: pointer;
  font-weight: 750;
  font: inherit;
  line-height: 1.2;
  text-decoration: none;
}

.m3u8tk-btn:hover,
.m3u8tk-file-label:hover {
  border-color: rgba(37, 99, 235, .45);
  color: #1d4ed8;
}

.m3u8tk-btn-primary {
  background: #2563eb;
  border-color: #2563eb;
  color: #fff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, .18);
}

.m3u8tk-btn-primary:hover { color: #fff; background: #1d4ed8; }

.m3u8tk-player-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 18px;
}

.m3u8tk-video-wrap {
  border-radius: 20px;
  overflow: hidden;
  background: #020617;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.m3u8tk-video {
  display: block;
  width: 100%;
  min-height: 320px;
  aspect-ratio: 16 / 9;
  background: #020617;
}

.m3u8tk-side-panel,
.m3u8tk-report-block,
.m3u8tk-command-card,
.m3u8tk-detail-panel details {
  border: 1px solid rgba(100, 116, 139, .14);
  background: #f8fafc;
  border-radius: 20px;
  padding: 16px;
}

.m3u8tk-health-box {
  border: 1px solid rgba(37, 99, 235, .12);
  background: rgba(37, 99, 235, .05);
  border-radius: 16px;
  padding: 12px 14px;
  margin: 12px 0;
  color: #334155;
}

.m3u8tk-health-box ul,
.m3u8tk-detail-panel ul { margin: 8px 0 0 18px; padding: 0; }

.m3u8tk-status {
  white-space: pre-line;
  border: 1px solid rgba(100, 116, 139, .14);
  border-radius: 16px;
  background: #f8fafc;
  color: #334155;
  padding: 14px;
  line-height: 1.6;
  margin: 14px 0;
}

.m3u8tk-status.is-ok { background: #ecfdf5; border-color: rgba(34, 197, 94, .22); color: #166534; }
.m3u8tk-status.is-warn { background: #fffbeb; border-color: rgba(245, 158, 11, .24); color: #92400e; }
.m3u8tk-status.is-error { background: #fef2f2; border-color: rgba(239, 68, 68, .22); color: #991b1b; }
.m3u8tk-status.is-loading { background: #eff6ff; border-color: rgba(37, 99, 235, .22); color: #1e40af; }

.m3u8tk-actions,
.m3u8tk-actions-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 12px 0;
}

.m3u8tk-actions-inline { margin: 0; }

.m3u8tk-history-block { margin-top: 16px; }
.m3u8tk-history-block strong { display: block; margin-bottom: 10px; }

.m3u8tk-history-list,
.m3u8tk-playlist-list {
  display: grid;
  gap: 9px;
}

.m3u8tk-list-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(100, 116, 139, .14);
  background: #fff;
  border-radius: 14px;
  padding: 11px 12px;
}

.m3u8tk-list-item strong,
.m3u8tk-list-item span {
  display: block;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.m3u8tk-list-item span {
  color: #64748b;
  font-size: .86rem;
  margin-top: 4px;
}

.m3u8tk-mini-actions {
  display: inline-flex;
  gap: 7px;
  align-items: center;
}

.m3u8tk-mini-actions .m3u8tk-btn { padding: 8px 10px; border-radius: 11px; font-size: .84rem; }

.m3u8tk-empty {
  display: grid;
  gap: 4px;
  border: 1px dashed rgba(100, 116, 139, .28);
  border-radius: 14px;
  padding: 14px;
  color: #64748b;
}

.m3u8tk-empty strong { color: #0f172a; }

.m3u8tk-result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.m3u8tk-result-card {
  border: 1px solid rgba(100, 116, 139, .14);
  background: #fff;
  border-radius: 18px;
  padding: 15px;
  min-height: 88px;
}

.m3u8tk-result-card strong {
  display: block;
  font-size: 1.15rem;
  margin-bottom: 8px;
  word-break: break-word;
}

.m3u8tk-result-card span { color: #64748b; line-height: 1.45; }

.m3u8tk-report-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.m3u8tk-detail-panel { margin: 14px 0; }
.m3u8tk-detail-panel details { padding: 0; overflow: hidden; }
.m3u8tk-detail-panel summary { cursor: pointer; padding: 14px 16px; font-weight: 800; }
.m3u8tk-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 0 16px 16px; }

.m3u8tk-table-wrap { overflow-x: auto; padding: 0 16px 16px; }
.m3u8tk table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; }
.m3u8tk th,
.m3u8tk td { border-bottom: 1px solid rgba(100, 116, 139, .14); padding: 10px; text-align: left; vertical-align: top; }
.m3u8tk th { color: #334155; background: #f1f5f9; font-size: .86rem; }
.m3u8tk td code { word-break: break-all; white-space: normal; }

.m3u8tk-command-card { margin-top: 16px; }
.m3u8tk-command-card p { color: #64748b; line-height: 1.6; }
.m3u8tk-command-card pre {
  overflow-x: auto;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 16px;
  padding: 14px;
}

.m3u8tk-file-label input { display: none; }

.m3u8tk-note {
  margin-top: 18px;
  border: 1px solid rgba(100, 116, 139, .14);
  border-radius: 16px;
  padding: 12px 14px;
  color: #64748b;
  background: #f8fafc;
  font-size: .92rem;
  line-height: 1.55;
}

@media (max-width: 980px) {
  .m3u8tk-player-grid,
  .m3u8tk-detail-grid { grid-template-columns: 1fr; }
  .m3u8tk-result-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .m3u8tk { padding: 18px; border-radius: 20px; }
  .m3u8tk-head { display: grid; }
  .m3u8tk-input-row,
  .m3u8tk-playlist-form { grid-template-columns: 1fr; }
  .m3u8tk-result-grid { grid-template-columns: 1fr; }
  .m3u8tk-report-head { align-items: flex-start; flex-direction: column; }
  .m3u8tk-list-item { grid-template-columns: 1fr; }
  .m3u8tk-mini-actions { flex-wrap: wrap; }
  .m3u8tk-video-wrap,
  .m3u8tk-video { min-height: 220px; }
}


/* V0.4 static export health block */
.m3u8tk-static-health .m3u8tk-card span { display: block; margin-top: 6px; font-size: 18px; font-weight: 800; color: #0f172a; }
.m3u8tk-static-health .m3u8tk-card small { display: block; margin-top: 6px; color: #64748b; line-height: 1.5; }


.m3u8tk-checklist-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

@media (max-width: 900px) {
  .m3u8tk-checklist-grid { grid-template-columns: 1fr; }
}


/* V1.3 workspace alignment */
.m3u8tk-workspace-shell{display:grid;gap:18px}.m3u8tk-workspace-intro{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;padding:20px;border-radius:24px;background:#fff;border:1px solid rgba(15,23,42,.10);box-shadow:0 10px 30px rgba(15,23,42,.05)}.m3u8tk-workspace-intro h2{margin:0;font-size:clamp(1.7rem,2.5vw,2.7rem);letter-spacing:-.055em;line-height:1}.m3u8tk-workspace-intro p{margin:8px 0 0;color:#64748b}.m3u8tk-workspace-steps{display:flex;flex-wrap:wrap;gap:8px}.m3u8tk-workspace-steps span{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border-radius:999px;background:#eef5ff;color:#1d4ed8;font-weight:800;font-size:12px}.m3u8tk-workspace-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(340px,.75fr);gap:16px}.m3u8tk-workspace-column{display:grid;gap:16px;align-content:start}.m3u8tk-workspace-column .m3u8tk{margin:0!important}.m3u8tk-workspace-note{padding:16px 18px;border-radius:20px;background:#fff7ed;border:1px solid rgba(245,158,11,.24);color:#7c4a03}.m3u8tk-workspace-note p{margin:.4em 0 0}@media(max-width:1180px){.m3u8tk-workspace-grid{grid-template-columns:1fr}.m3u8tk-workspace-intro{display:grid}}@media(max-width:720px){.m3u8tk-workspace-steps{flex-wrap:nowrap;overflow:auto;padding-bottom:4px}.m3u8tk-workspace-steps span{white-space:nowrap}}


/* V1.4 unified workspace command layer */
.m3u8tk-workspace-command{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(320px,1.1fr);gap:14px;align-items:center;padding:18px;border-radius:24px;background:linear-gradient(180deg,#ffffff,#f5f8ff);border:1px solid rgba(16,32,51,.10);box-shadow:0 12px 32px rgba(16,32,51,.05)}
.m3u8tk-workspace-command-copy{display:grid;gap:4px}.m3u8tk-workspace-command-copy strong{font-size:20px;line-height:1.1}.m3u8tk-workspace-command-copy small{color:#64748b}.m3u8tk-workspace-command-input{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.m3u8tk-workspace-command-input input{min-height:48px;border:1px solid rgba(16,32,51,.14);border-radius:999px;padding:0 16px;background:#fff}.m3u8tk-workspace-command-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:8px}.m3u8tk-workspace-command-status{grid-column:1/-1;padding:11px 14px;border-radius:16px;background:#eef5ff;color:#26415f;font-weight:700}.m3u8tk-workspace-command-status.is-ok{background:#ecfdf5;color:#047857}.m3u8tk-workspace-command-status.is-warn{background:#fff7ed;color:#9a3412}.m3u8tk-workspace-command-status.is-error{background:#fff1f2;color:#be123c}.m3u8tk-workspace-command-status.is-loading{background:#eff6ff;color:#1d4ed8}.m3u8tk-workspace-shell[data-m3u8-workspace="v1.4"] .m3u8tk-workspace-grid{align-items:start}.m3u8tk-workspace-shell[data-m3u8-workspace="v1.4"] .m3u8tk-workspace-secondary{position:sticky;top:96px}
@media(max-width:980px){.m3u8tk-workspace-command,.m3u8tk-workspace-command-input{grid-template-columns:1fr}.m3u8tk-workspace-shell[data-m3u8-workspace="v1.4"] .m3u8tk-workspace-secondary{position:static}.m3u8tk-workspace-command-actions{overflow:auto;flex-wrap:nowrap;padding-bottom:4px}.m3u8tk-workspace-command-actions .m3u8tk-btn{white-space:nowrap}}


/* V1.5 diagnostic depth */
.m3u8tk-diagnosis-panel{margin:16px 0;border:1px solid rgba(37,99,235,.14);background:linear-gradient(135deg,rgba(239,246,255,.95),rgba(255,255,255,.95));border-radius:20px;padding:16px}
.m3u8tk-diagnosis-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}.m3u8tk-diagnosis-head strong{font-size:1.05rem}.m3u8tk-diagnosis-head small{color:#64748b}.m3u8tk-diagnosis-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.m3u8tk-diagnosis-card{border:1px solid rgba(100,116,139,.16);background:#fff;border-radius:16px;padding:13px;display:grid;gap:6px}.m3u8tk-diagnosis-card strong{color:#0f172a}.m3u8tk-diagnosis-card span{color:#475569;font-size:.9rem;line-height:1.55}.m3u8tk-diagnosis-card.is-error{border-color:rgba(239,68,68,.24);background:#fff7f7}.m3u8tk-diagnosis-card.is-warn{border-color:rgba(245,158,11,.28);background:#fffbeb}.m3u8tk-diagnosis-card.is-ok{border-color:rgba(34,197,94,.24);background:#ecfdf5}.m3u8tk-diagnosis-card.is-info{border-color:rgba(37,99,235,.2);background:#eff6ff}.m3u8tk-segment-preview{margin-top:14px;border:1px solid rgba(100,116,139,.14);border-radius:16px;background:#fff;padding:14px}.m3u8tk-segment-preview ol{margin:10px 0 0 20px;padding:0}.m3u8tk-segment-preview code{word-break:break-all;white-space:normal}.m3u8tk-table-wrap{overflow:auto;margin-top:14px}.m3u8tk-table-wrap table{width:100%;border-collapse:collapse;font-size:.88rem}.m3u8tk-table-wrap th,.m3u8tk-table-wrap td{border-bottom:1px solid rgba(100,116,139,.14);padding:9px 10px;text-align:left;vertical-align:top}.m3u8tk-table-wrap th{background:#f8fafc;color:#334155;font-weight:800}@media(max-width:900px){.m3u8tk-diagnosis-grid{grid-template-columns:1fr}.m3u8tk-diagnosis-head{display:grid}.m3u8tk-table-wrap{margin-left:-4px;margin-right:-4px}}

/* V1.7 visual and interaction polish */
.m3u8tk{position:relative;overflow:hidden;border-radius:28px!important;background:linear-gradient(180deg,#fff 0%,#f9fbff 100%);box-shadow:0 24px 80px rgba(15,23,42,.09)!important}.m3u8tk:before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,#15a66a,#2367f4);opacity:.85}.m3u8tk-head{position:relative}.m3u8tk-head h2{letter-spacing:-.035em}.m3u8tk-badge{box-shadow:0 8px 24px rgba(37,99,235,.08)}
.m3u8tk-input-row,.m3u8tk-playlist-form{padding:8px;border:1px solid rgba(15,23,42,.08);background:#f8fbff;border-radius:20px}.m3u8tk input,.m3u8tk textarea{border-radius:16px;border-color:rgba(15,23,42,.14)}.m3u8tk-btn{transition:.16s ease;min-height:44px}.m3u8tk-btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(15,23,42,.08)}.m3u8tk-btn-primary{background:linear-gradient(135deg,#2367f4,#1f8fff);border-color:#2367f4;box-shadow:0 14px 28px rgba(35,103,244,.24)}.m3u8tk-btn-primary.is-busy{opacity:.72;pointer-events:none}.m3u8tk-status{font-weight:650}.m3u8tk-status.is-loading:before{content:"";display:inline-block;width:9px;height:9px;margin-right:8px;border-radius:50%;background:#2367f4;box-shadow:0 0 0 5px rgba(35,103,244,.12)}
.m3u8tk-video-wrap{box-shadow:inset 0 0 0 1px rgba(255,255,255,.08),0 22px 60px rgba(2,6,23,.18)}.m3u8tk-side-panel,.m3u8tk-report-block,.m3u8tk-command-card,.m3u8tk-detail-panel details{background:linear-gradient(180deg,#f8fafc,#fff)}.m3u8tk-result-card{box-shadow:0 10px 26px rgba(15,23,42,.045)}.m3u8tk-diagnosis-panel{box-shadow:0 16px 46px rgba(37,99,235,.08)}.m3u8tk-diagnosis-card{min-height:112px}.m3u8tk-list-item{transition:.16s}.m3u8tk-list-item:hover{border-color:rgba(35,103,244,.24);box-shadow:0 12px 26px rgba(15,23,42,.06)}
.m3u8tk-workspace-command{position:sticky;top:84px;z-index:20;background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(244,248,255,.98));backdrop-filter:blur(14px);box-shadow:0 18px 52px rgba(15,23,42,.10)}.m3u8tk-workspace-command-actions .m3u8tk-btn:first-child{background:#ecfdf5;border-color:rgba(21,166,106,.24);color:#047857}.m3u8tk-workspace-command-status{border:1px solid rgba(15,23,42,.08)}.m3u8tk-workspace-grid{align-items:start}.m3u8tk-workspace-secondary{gap:18px}.m3u8tk-workspace-note{background:linear-gradient(180deg,#fff7ed,#fff);box-shadow:0 12px 30px rgba(245,158,11,.08)}
.m3u8tk-toast{position:fixed;right:22px;bottom:22px;z-index:99999;max-width:360px;padding:13px 16px;border-radius:16px;background:#0f172a;color:#fff;box-shadow:0 24px 70px rgba(2,6,23,.35);font-weight:800;transform:translateY(16px);opacity:0;transition:.18s}.m3u8tk-toast.is-show{transform:translateY(0);opacity:1}.m3u8tk-toast.is-ok{background:#047857}.m3u8tk-toast.is-error{background:#be123c}.m3u8tk-toast.is-warn{background:#9a3412}
@media(max-width:980px){.m3u8tk-workspace-command{position:static}.m3u8tk-workspace-command-copy strong{font-size:18px}.m3u8tk-input-row,.m3u8tk-playlist-form{padding:6px}}
@media(max-width:720px){.m3u8tk{padding:16px!important}.m3u8tk-head h2{font-size:1.45rem}.m3u8tk-btn,.m3u8tk-file-label{width:100%}.m3u8tk-actions .m3u8tk-btn,.m3u8tk-actions-inline .m3u8tk-btn{width:auto;flex:1 1 140px}.m3u8tk-workspace-command-actions{display:grid;grid-template-columns:1fr 1fr}.m3u8tk-workspace-command-actions .m3u8tk-btn{width:100%}.m3u8tk-toast{left:14px;right:14px;bottom:14px;max-width:none}}