/**
 * M3U Merger — advanced layout
 * Location: assets/css/m3u-merger.css
 */

.tool-page.merger-pro {
  max-width: 920px;
}

/* -------- Hero -------- */
.merger-hero {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 18px 22px;
  margin-bottom: 28px;
  padding: 22px 24px;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(99, 102, 241, 0.11) 0%, rgba(139, 92, 246, 0.08) 45%, rgba(16, 185, 129, 0.06) 100%);
  border: 1px solid rgba(99, 102, 241, 0.22);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.06);
}

[data-theme="dark"] .merger-hero {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(139, 92, 246, 0.08) 55%, rgba(16, 185, 129, 0.05) 100%);
  border-color: rgba(129, 140, 248, 0.35);
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.35);
}

.merger-hero-mark {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #6366f1 0%, #7c3aed 100%);
  color: #fff;
  box-shadow:
    0 10px 28px rgba(99, 102, 241, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.merger-hero-mark svg {
  display: block;
}

.merger-hero-copy {
  flex: 1 1 260px;
  min-width: 0;
}

.merger-hero-copy h1 {
  font-size: clamp(1.65rem, 3.4vw, 2.05rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 10px;
}

.merger-hero-lead {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0 0 16px;
}

.merger-hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.merger-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
}

.merger-chip--accent {
  border-color: rgba(99, 102, 241, 0.45);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.merger-chip--ok {
  border-color: rgba(16, 185, 129, 0.45);
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.merger-chip--subtle {
  font-size: 10px;
}

.merger-hero-note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.55;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
}

/* -------- Step cards -------- */
.merger-workflow {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.merger-step {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: 0 6px 26px rgba(15, 23, 42, 0.045);
  overflow: hidden;
}

[data-theme="dark"] .merger-step {
  box-shadow: 0 8px 36px rgba(0, 0, 0, 0.35);
}

.merger-step.is-disabled {
  opacity: 0.55;
  pointer-events: none;
  filter: saturate(0.75);
}

.merger-step-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.06), transparent);
  border-bottom: 1px solid var(--border);
}

.merger-step-num {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 850;
  font-size: 18px;
  color: #fff;
  background: linear-gradient(145deg, var(--primary), #7c3aed);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.35);
}

.merger-step-num.is-pending {
  background: var(--bg-secondary);
  color: var(--text-muted);
  box-shadow: none;
  border: 1px dashed var(--border);
}

.merger-step-titles {
  flex: 1;
  min-width: 0;
}

.merger-step-title {
  font-size: 18px;
  font-weight: 750;
  margin: 0;
  letter-spacing: -0.02em;
}

.merger-step-sub {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.45;
}

.merger-step-meta {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.1);
}

.merger-step-body {
  padding: 20px 22px 22px;
}

/* Captcha shell */
.merger-captcha-shell {
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  margin-bottom: 8px;
}

.merger-playlist-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.merger-source-card.file-info {
  border-radius: 14px;
  border: 1px solid var(--border);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.merger-source-card.file-info:hover {
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.08);
}

/* Category panel */
.merger-cat-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 16px;
}

.merger-cat-controls[hidden] {
  display: none !important;
}

.merger-filter-wrap {
  flex: 1;
  min-width: 200px;
}

.merger-filter-wrap label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.merger-filter-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-size: 14px;
  background: var(--bg-card);
}

.merger-cat-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.merger-category-panels {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.merger-cat-intro {
  margin-bottom: 8px !important;
  font-size: 14px !important;
}

.merger-cat-block {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 14px 14px;
  background: var(--bg-secondary);
}

.merger-cat-block summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
}

.merger-cat-tag {
  display: inline-block;
  min-width: 2em;
  font-size: 11px;
  font-weight: 800;
  color: var(--primary);
}

.merger-cat-count {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 12px;
}

.merger-cat-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 10px;
}

.merger-cat-toolbar .btn-sm {
  font-size: 12px;
  padding: 6px 12px;
}

.merger-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 6px 14px;
  margin-top: 4px;
}

.merger-cat-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12px;
  line-height: 1.35;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 8px;
}

.merger-cat-item:hover {
  background: rgba(99, 102, 241, 0.06);
}

.merger-cat-item input {
  margin-top: 2px;
  flex-shrink: 0;
}

.merger-cat-item em {
  font-style: normal;
  color: var(--text-muted);
  font-size: 11px;
}

/* Options grid override on merger */
.merger-pro .options-grid {
  gap: 14px;
}

.merger-pro .option-card {
  border-radius: 14px;
  border: 1px solid var(--border);
}

.merger-merge-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.merger-merge-actions .btn-lg {
  min-width: 200px;
}

.merger-result-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

@media (max-width: 560px) {
  .merger-hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px 18px;
  }
  .merger-hero-badges {
    justify-content: center;
  }
  .merger-hero-copy {
    text-align: center;
  }
  .merger-hero-note {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .merger-step-head {
    flex-wrap: wrap;
  }
  .merger-step-meta {
    width: 100%;
    text-align: center;
  }
}

/* ============================================================
   PREMIUM REFINEMENT PASS — elevate (no redesign). All token-driven
   so light + dark stay intentional.
   ============================================================ */
.merger-pro {
  --mg-grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --mg-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Hero benefit indicators ---------- */
.merger-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}
.merger-benefits li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  font-weight: 650;
  color: var(--text-secondary);
}
.merger-benefits li svg {
  width: 14px;
  height: 14px;
  color: var(--success, #10b981);
  flex-shrink: 0;
}

/* ---------- Options: clearer hierarchy + selection ---------- */
.merger-pro .option-card {
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color 0.18s ease, background 0.2s var(--mg-ease),
              box-shadow 0.2s var(--mg-ease), transform 0.16s var(--mg-ease);
}
[data-theme="dark"] .merger-pro .option-card { box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4); }
.merger-pro .option-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 12px 26px -16px rgba(99, 102, 241, 0.45);
}
.merger-pro .option-card:has(input:checked),
.merger-pro .option-card.is-checked {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(139, 92, 246, 0.05));
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.12), 0 10px 26px -18px rgba(99, 102, 241, 0.4);
}
[data-theme="dark"] .merger-pro .option-card:has(input:checked),
[data-theme="dark"] .merger-pro .option-card.is-checked {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(99, 102, 241, 0.08));
}
.merger-opt__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  font-size: 20px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.10));
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.12);
}
.merger-pro .option-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.merger-opt__rec {
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(99, 102, 241, 0.10);
  border: 1px solid rgba(99, 102, 241, 0.22);
  border-radius: 999px;
  padding: 2px 8px;
}
[data-theme="dark"] .merger-opt__rec {
  background: rgba(139, 92, 246, 0.18);
  border-color: rgba(139, 92, 246, 0.32);
  color: var(--primary-light, #a5b4fc);
}

/* ---------- Export step: more important ---------- */
.merger-pro #step3.merger-step {
  border-color: rgba(99, 102, 241, 0.28);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 18px 44px -24px rgba(99, 102, 241, 0.3);
}
[data-theme="dark"] .merger-pro #step3.merger-step {
  border-color: rgba(139, 92, 246, 0.32);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 18px 44px -24px rgba(0, 0, 0, 0.7);
}
.merger-pro #step3 .merger-merge-actions .btn-primary {
  box-shadow: 0 12px 28px -10px rgba(99, 102, 241, 0.55);
}
.merger-pro .result-box { border-radius: 16px; }
.merger-pro .result-stat { border-radius: 12px; }

/* ---------- Related tools → Tools-Hub quality ---------- */
.merger-pro .related-tools { max-width: 1080px; margin-left: auto; margin-right: auto; }
.merger-pro .related-tools h3 { font-size: 20px; font-weight: 800; letter-spacing: -0.015em; }
.merger-pro .related-tools-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.merger-pro .related-tool-card {
  position: relative;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 18px;
  border-radius: 14px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 20px -16px rgba(15, 23, 42, 0.16);
  transition: border-color 0.18s ease, box-shadow 0.2s var(--mg-ease), transform 0.18s var(--mg-ease);
}
.merger-pro .related-tool-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 38px -18px rgba(99, 102, 241, 0.35);
}
[data-theme="dark"] .merger-pro .related-tool-card {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 8px 20px -16px rgba(0, 0, 0, 0.6);
}
.merger-pro .related-tool-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-size: 22px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.10));
  box-shadow: inset 0 0 0 1px rgba(99, 102, 241, 0.12);
}
.merger-pro .related-tool-name { font-size: 15px; font-weight: 700; color: var(--text); }
.merger-pro .related-tool-desc { font-size: 12.5px; line-height: 1.45; color: var(--text-muted); }
.merger-pro .related-tool-card::after {
  content: '→';
  position: absolute;
  top: 16px;
  right: 16px;
  font-weight: 700;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.merger-pro .related-tool-card:hover::after { opacity: 1; transform: translateX(0); }

/* ---------- SEO blocks (.merger-seo-wrap) — FAQ + use-case polish ---------- */
.merger-seo-wrap .seo-block__title { font-family: 'Plus Jakarta Sans', 'Inter', sans-serif; letter-spacing: -0.02em; }
.merger-seo-wrap .seo-usecases__item {
  border-radius: 14px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 20px -16px rgba(15, 23, 42, 0.14);
  transition: border-color 0.18s ease, box-shadow 0.2s var(--mg-ease), transform 0.18s var(--mg-ease);
}
.merger-seo-wrap .seo-usecases__item:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 16px 34px -18px rgba(99, 102, 241, 0.3);
}
[data-theme="dark"] .merger-seo-wrap .seo-usecases__item {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.45), 0 8px 20px -16px rgba(0, 0, 0, 0.6);
}
.merger-seo-wrap .seo-faq__item { transition: border-color 0.18s ease, box-shadow 0.18s ease; }
.merger-seo-wrap .seo-faq__item:hover { border-color: var(--primary); }
.merger-seo-wrap .seo-faq__item summary { position: relative; padding-right: 2.75rem; transition: color 0.18s ease; }
.merger-seo-wrap .seo-faq__item summary::after {
  content: '';
  position: absolute;
  right: 1.2rem;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: translateY(-65%) rotate(45deg);
  transition: transform 0.22s var(--mg-ease), border-color 0.18s ease;
}
.merger-seo-wrap .seo-faq__item[open] summary { color: var(--primary); }
.merger-seo-wrap .seo-faq__item[open] summary::after { transform: translateY(-35%) rotate(-135deg); border-color: var(--primary); }
.merger-seo-wrap .seo-faq__item summary:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; border-radius: 12px; }

@media (prefers-reduced-motion: reduce) {
  .merger-pro .option-card,
  .merger-pro .related-tool-card,
  .merger-seo-wrap .seo-usecases__item { transition: none !important; }
}