/* ============================================================
   SPEAKING LESSONS — Shared CSS  (prefix: sl-)
   ============================================================ */

/* ── Page wrapper ─────────────────────────────────────────── */
.sl-page {
  width: 100%;
  padding: 0 0 60px;
  font-size: 1.2rem;
  line-height: 1.75;
  color: var(--text);
}

.sl-badge {
  display: inline-block;
  background: rgba(168,85,247,.15);
  border: 1px solid rgba(168,85,247,.35);
  color: #c4b5fd;
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.sl-h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 0 0 10px;
  color: var(--text);
  letter-spacing: -.01em;
}

.sl-sub {
  color: rgba(255,255,255,.6);
  font-size: 1.08rem;
  margin: 0 0 32px;
}

/* ── Overview stat cards ──────────────────────────────────── */
.sl-intro-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
@media (max-width: 700px) { .sl-intro-grid { grid-template-columns: 1fr 1fr; } }

.sl-intro-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 20px;
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 7px;
  transition: border-color .2s;
}
.sl-intro-card:hover { border-color: rgba(168,85,247,.4); }
.sl-card-icon  { font-size: 2rem; }
.sl-card-label { font-size: .95rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: rgba(255,255,255,.45); }
.sl-card-val   { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.sl-big-num    { font-size: 2.2rem; font-weight: 800; color: #c4b5fd; }
.sl-card-sub   { font-size: .88rem; color: rgba(255,255,255,.4); margin-top: -4px; }
.sl-card-purple { border-color: rgba(168,85,247,.4); background: rgba(168,85,247,.06); }

/* ── Notice bar ───────────────────────────────────────────── */
.sl-notice {
  display: flex; gap: 16px; align-items: flex-start;
  background: rgba(74,222,128,.07);
  border: 1px solid rgba(74,222,128,.25);
  border-radius: 12px;
  padding: 18px 24px;
  margin-bottom: 32px;
  font-size: 1.05rem;
}
.sl-notice-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }

/* ── Section title ────────────────────────────────────────── */
.sl-section-title {
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin: 32px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

/* ── Tip / info box ───────────────────────────────────────── */
.sl-tip-box {
  display: flex; gap: 16px; align-items: flex-start;
  background: rgba(251,191,36,.07);
  border: 1px solid rgba(251,191,36,.25);
  border-radius: 12px;
  padding: 18px 24px;
  margin: 28px 0;
  font-size: 1.05rem;
}
.sl-tip-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }

.sl-warn-box {
  display: flex; gap: 16px; align-items: flex-start;
  background: rgba(239,68,68,.07);
  border: 1px solid rgba(239,68,68,.25);
  border-radius: 12px;
  padding: 18px 24px;
  margin: 28px 0;
  font-size: 1.05rem;
}

/* ── The 3 Parts cards ────────────────────────────────────── */
.sl-parts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 16px 0 36px;
}
@media (max-width: 780px) { .sl-parts-grid { grid-template-columns: 1fr; } }

.sl-part-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px 22px;
  display: flex; flex-direction: column; gap: 16px;
  transition: border-color .2s, transform .15s;
}
.sl-part-card:hover { border-color: rgba(168,85,247,.4); transform: translateY(-2px); }

.sl-part-header {
  display: flex; align-items: center; gap: 14px;
}
.sl-part-num {
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 900; flex-shrink: 0;
}
.sl-pn-1 { background: rgba(96,165,250,.2); color: #60a5fa; border: 2px solid rgba(96,165,250,.4); }
.sl-pn-2 { background: rgba(168,85,247,.2); color: #c4b5fd; border: 2px solid rgba(168,85,247,.4); }
.sl-pn-3 { background: rgba(251,191,36,.2); color: #fbbf24; border: 2px solid rgba(251,191,36,.4); }

/* Part label (replaces circle numbers in overview cards) */
.sl-part-label {
  font-size: 1rem; font-weight: 900; letter-spacing: .04em;
  text-transform: uppercase; margin-bottom: 2px;
}
.sl-pl-1 { color: #60a5fa; }
.sl-pl-2 { color: #c4b5fd; }
.sl-pl-3 { color: #fbbf24; }

/* Part blocks in Step 2 (in-depth view) */
.sl-part-block {
  border-radius: 14px;
  border: 1px solid;
  padding: 24px 26px;
  margin-bottom: 28px;
}
.sl-pb-1 { border-color: rgba(96,165,250,.3); background: rgba(96,165,250,.04); }
.sl-pb-2 { border-color: rgba(168,85,247,.3); background: rgba(168,85,247,.04); }
.sl-pb-3 { border-color: rgba(251,191,36,.3); background: rgba(251,191,36,.04); }

.sl-part-block-title {
  font-size: 1.35rem; font-weight: 900;
  margin-bottom: 18px; padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sl-pb-1 .sl-part-block-title { color: #60a5fa; }
.sl-pb-2 .sl-part-block-title { color: #c4b5fd; }
.sl-pb-3 .sl-part-block-title { color: #fbbf24; }

.sl-part-title    { font-size: 1.1rem; font-weight: 800; }
.sl-part-subtitle { font-size: .88rem; color: rgba(255,255,255,.5); margin-top: 2px; }

.sl-part-meta {
  display: flex; flex-wrap: wrap; gap: 7px;
}
.sl-meta-chip {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 20px;
  padding: 4px 13px;
  font-size: .85rem; color: rgba(255,255,255,.65);
}

.sl-part-desc {
  font-size: 1rem;
  color: rgba(255,255,255,.75);
  line-height: 1.7;
}

.sl-part-example {
  background: rgba(255,255,255,.04);
  border-left: 3px solid;
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  font-size: .95rem;
  color: rgba(255,255,255,.6);
}
.sl-part-example strong {
  color: rgba(255,255,255,.85); display: block; margin-bottom: 5px;
  font-size: .82rem; text-transform: uppercase; letter-spacing: .05em;
}
.sl-pe-1 { border-color: #60a5fa; }
.sl-pe-2 { border-color: #c4b5fd; }
.sl-pe-3 { border-color: #fbbf24; }

.sl-part-tip {
  font-size: .92rem;
  color: #c4b5fd;
  background: rgba(168,85,247,.08);
  border-radius: 8px;
  padding: 10px 14px;
}

/* ── Criteria cards ───────────────────────────────────────── */
.sl-criteria-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 16px 0 32px;
}
@media (max-width: 700px) { .sl-criteria-grid { grid-template-columns: 1fr; } }

.sl-crit-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 22px;
  display: flex; flex-direction: column; gap: 14px;
}

.sl-crit-header {
  display: flex; align-items: center; gap: 14px;
}
.sl-crit-pct {
  font-size: 1.8rem; font-weight: 900; min-width: 62px;
}
.sl-crit-c1 .sl-crit-pct { color: #60a5fa; }
.sl-crit-c2 .sl-crit-pct { color: #34d399; }
.sl-crit-c3 .sl-crit-pct { color: #fbbf24; }
.sl-crit-c4 .sl-crit-pct { color: #f87171; }

.sl-crit-c1 { border-top: 3px solid #60a5fa; }
.sl-crit-c2 { border-top: 3px solid #34d399; }
.sl-crit-c3 { border-top: 3px solid #fbbf24; }
.sl-crit-c4 { border-top: 3px solid #f87171; }

.sl-crit-name { font-size: 1.08rem; font-weight: 800; }
.sl-crit-tag  { font-size: .82rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; margin-top: 2px; }
.sl-crit-c1 .sl-crit-tag { color: #60a5fa; }
.sl-crit-c2 .sl-crit-tag { color: #34d399; }
.sl-crit-c3 .sl-crit-tag { color: #fbbf24; }
.sl-crit-c4 .sl-crit-tag { color: #f87171; }

.sl-crit-desc {
  font-size: 1rem;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
}

.sl-crit-looks { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 7px; }
.sl-crit-looks li {
  font-size: .97rem; color: rgba(255,255,255,.65);
  padding-left: 20px; position: relative; line-height: 1.55;
}
.sl-crit-looks li::before { content: '✔'; position: absolute; left: 0; font-size: .8rem; top: 2px; }
.sl-crit-c1 .sl-crit-looks li::before { color: #60a5fa; }
.sl-crit-c2 .sl-crit-looks li::before { color: #34d399; }
.sl-crit-c3 .sl-crit-looks li::before { color: #fbbf24; }
.sl-crit-c4 .sl-crit-looks li::before { color: #f87171; }

.sl-crit-mistake {
  background: rgba(239,68,68,.07);
  border: 1px solid rgba(239,68,68,.2);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .95rem;
  color: rgba(255,255,255,.6);
  line-height: 1.6;
}
.sl-crit-mistake strong { color: #f87171; }

/* ── Band comparison table ────────────────────────────────── */
.sl-band-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 1rem;
  margin: 16px 0 32px;
  border-radius: 12px;
  overflow: hidden;
}
.sl-band-table th {
  background: rgba(168,85,247,.15);
  padding: 13px 18px;
  text-align: left;
  font-size: .85rem;
  font-weight: 800;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: #c4b5fd;
  border-bottom: 1px solid var(--border);
}
.sl-band-table td {
  padding: 13px 18px;
  border-bottom: 1px solid rgba(255,255,255,.05);
  color: rgba(255,255,255,.75);
  vertical-align: top;
  line-height: 1.6;
}
.sl-band-table tr:last-child td { border-bottom: none; }
.sl-band-table tr:hover td { background: rgba(255,255,255,.03); }
.sl-band-num {
  font-weight: 900; font-size: 1.1rem; white-space: nowrap;
}
.sl-b-high .sl-band-num { color: #34d399; }
.sl-b-mid  .sl-band-num { color: #fbbf24; }
.sl-b-low  .sl-band-num { color: #f87171; }

/* ── Myth-buster box ──────────────────────────────────────── */
.sl-myths-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 16px 0;
}
@media (max-width: 700px) { .sl-myths-grid { grid-template-columns: 1fr; } }

.sl-myth-card {
  border-radius: 12px;
  padding: 18px 22px;
  font-size: 1rem;
  line-height: 1.65;
}
.sl-myth-x {
  background: rgba(239,68,68,.07);
  border: 1px solid rgba(239,68,68,.2);
}
.sl-myth-check {
  background: rgba(74,222,128,.07);
  border: 1px solid rgba(74,222,128,.2);
}
.sl-myth-label {
  font-size: .78rem; font-weight: 800; letter-spacing: .08em;
  text-transform: uppercase; margin-bottom: 6px;
}
.sl-myth-x     .sl-myth-label { color: #f87171; }
.sl-myth-check .sl-myth-label { color: #4ade80; }

/* ── Light theme overrides ────────────────────────────────── */
[data-theme="light"] .sl-sub           { color: rgba(0,0,0,.5); }
[data-theme="light"] .sl-intro-card    { background: #fff; }
[data-theme="light"] .sl-part-card     { background: #fff; }
[data-theme="light"] .sl-crit-card     { background: #fff; }
[data-theme="light"] .sl-card-label    { color: rgba(0,0,0,.45); }
[data-theme="light"] .sl-card-sub      { color: rgba(0,0,0,.4); }
[data-theme="light"] .sl-crit-desc     { color: rgba(0,0,0,.7); }
[data-theme="light"] .sl-crit-looks li { color: rgba(0,0,0,.65); }
[data-theme="light"] .sl-part-desc     { color: rgba(0,0,0,.65); }
[data-theme="light"] .sl-band-table td { color: rgba(0,0,0,.7); }
[data-theme="light"] .sl-band-table th { background: rgba(168,85,247,.1); color: #6d28d9; }

/* ── Part headings (Step 2) ───────────────────────────────── */
.sl-part-heading {
  font-size: 1.55rem;
  font-weight: 800;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid;
  display: flex; align-items: baseline; gap: 14px;
  letter-spacing: -.01em;
}
.sl-ph-1 { color: #60a5fa; border-color: rgba(96,165,250,.35); }
.sl-ph-2 { color: #c4b5fd; border-color: rgba(168,85,247,.35); }
.sl-ph-3 { color: #fbbf24; border-color: rgba(251,191,36,.35); }

.sl-ph-time {
  font-size: .88rem;
  font-weight: 600;
  opacity: .6;
  letter-spacing: 0;
}

[data-theme="light"] .sl-ph-1 { color: #1d4ed8; border-color: rgba(29,78,216,.3); }
[data-theme="light"] .sl-ph-2 { color: #7c3aed; border-color: rgba(124,58,237,.3); }
[data-theme="light"] .sl-ph-3 { color: #92400e; border-color: rgba(146,64,14,.3); }