/* ============================================================
   iMusic — Lessons page.
   Left nav (lesson list) + right content pane (notation viewer).
   Layers on top of ../site.css.
   ============================================================ */

.lessons-layout {
  width: 100%;
  box-sizing: border-box;
  padding: 40px 32px 90px;
  display: flex;
  align-items: flex-start;
  gap: 36px;
}

/* ---------- Left nav ---------- */

.lessons-nav {
  width: 250px;
  flex-shrink: 0;
  position: sticky;
  top: 90px;
}

.lessons-nav-group {
  margin-bottom: 24px;
}

.lessons-nav-group h3 {
  margin: 0 0 8px;
  padding: 0 12px;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.lessons-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  transition: background 120ms ease, color 120ms ease;
}

.lessons-nav a:hover {
  background: rgba(201, 162, 74, 0.12);
  color: var(--brass);
}

.lessons-nav a.active {
  background: var(--brass);
  color: var(--bg-soft);
  font-weight: 600;
}

.lessons-nav a.soon {
  cursor: default;
  opacity: 0.5;
}

.lessons-nav a.soon:hover {
  background: none;
  color: var(--ink);
}

.lessons-nav .soon-badge {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px dashed var(--brass-dim);
  border-radius: 50px;
  padding: 1px 7px;
  flex-shrink: 0;
}

.lessons-nav-toggle {
  display: none;
}

.lessons-nav-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

/* ---------- Tradition switcher ---------- */

.tradition-switcher {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--card-border);
}

.tradition-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}

.tradition-btn:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.tradition-btn.active {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--bg-soft);
  font-weight: 600;
}

.tradition-btn .soon-badge {
  margin: 0;
}

.lessons-nav-top .lang-toggle {
  margin-left: auto;
}

/* ---------- Progress summary ---------- */

.lessons-progress {
  margin-bottom: 14px;
}

.progress-label {
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.progress-bar {
  height: 5px;
  border-radius: 3px;
  background: var(--card-border);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--brass);
  border-radius: 3px;
  transition: width 200ms ease;
}

/* ---------- Search ---------- */

.lessons-search {
  display: block;
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 14px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--ink);
  font-family: inherit;
  font-size: 13px;
}

.lessons-search::placeholder {
  color: var(--ink-soft);
}

.lessons-search:focus {
  outline: none;
  border-color: var(--brass);
}

/* ---------- Per-lesson completion ---------- */

.lesson-done-check {
  color: var(--brass);
  font-weight: 700;
  flex-shrink: 0;
}

.lessons-nav a.active .lesson-done-check {
  color: var(--bg-soft);
}

.lesson-done-toggle {
  display: block;
  margin: 30px 0 10px;
  padding: 10px 22px;
  border-radius: 50px;
  border: 1px solid var(--brass-dim);
  background: transparent;
  color: var(--brass);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.lesson-done-toggle:hover {
  border-color: var(--brass);
  background: rgba(201, 162, 74, 0.12);
}

.lesson-done-toggle.done {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--bg-soft);
}

/* ---------- Language toggle ---------- */

.lang-toggle {
  padding: 5px 12px;
  border-radius: 50px;
  border: 1px solid var(--brass-dim);
  background: transparent;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}

.lang-toggle:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.lang-toggle::before {
  content: "\1F310";
  margin-right: 6px;
  font-size: 11px;
}

/* Telugu text needs the Telugu-covering face; Playfair/Inter don't render it. */
body.lang-te .lesson-content,
body.lang-te .lessons-nav,
body.lang-te .lang-toggle {
  font-family: "Noto Sans Telugu", "Inter", sans-serif;
}

body.lang-te .lesson-content h1,
body.lang-te .lesson-content h2 {
  font-family: "Noto Sans Telugu", "Playfair Display", serif;
}

/* Swara/sahitya notation stays in Latin script regardless of language. */
body.lang-te table.swara-grid {
  font-family: "Playfair Display", "Georgia", serif;
}

/* ---------- Content pane ---------- */

.lesson-content {
  flex: 1;
  min-width: 0;
}

.lesson-content h1 {
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 36px;
  letter-spacing: 1px;
  color: var(--brass);
  margin: 0 0 6px;
  font-weight: 700;
}

.lesson-breadcrumb {
  font-size: 12px;
  color: var(--ink-soft);
  margin: 0 0 10px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.lesson-breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
}

.lesson-breadcrumb a:hover {
  color: var(--brass);
  text-decoration: underline;
}

.lesson-breadcrumb span[aria-current] {
  color: var(--ink);
}

.lesson-subline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
  margin: 0 0 16px;
}

.lesson-meta {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.lesson-reading-time,
.lesson-updated {
  font-size: 12px;
  color: var(--ink-soft);
}

.lesson-share {
  display: flex;
  gap: 8px;
  margin: 0 0 22px;
}

.lesson-share-btn {
  padding: 5px 12px;
  border-radius: 50px;
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: border-color 120ms ease, color 120ms ease;
}

.lesson-share-btn:hover {
  border-color: var(--brass);
  color: var(--brass);
}

.lesson-content > p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.9;
  max-width: 760px;
}

.lesson-content h2 {
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 20px;
  color: var(--brass);
  margin: 32px 0 6px;
  font-weight: 600;
}

.lesson-content ul,
.lesson-content ol {
  max-width: 760px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  opacity: 0.9;
  padding-left: 22px;
}

.lesson-content ul li,
.lesson-content ol li {
  margin-bottom: 6px;
}

.lesson-content .lesson-note {
  font-size: 13px;
  color: var(--ink-soft);
  border-left: 2px solid var(--brass-dim);
  padding-left: 12px;
  margin: 10px 0 26px;
  max-width: 740px;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 4px 0 24px;
  padding: 8px 16px;
  border-radius: 50px;
  border: 1px solid var(--brass-dim);
  color: var(--brass);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background 120ms ease, border-color 120ms ease;
}

.tool-link:hover {
  background: rgba(201, 162, 74, 0.12);
  border-color: var(--brass);
}

.lesson-figure {
  margin: 16px 0 28px;
  padding: 18px;
  max-width: 840px;
  border-radius: 14px;
  background: #f7f3ea;
  border: 1px solid var(--card-border);
  text-align: center;
}

.lesson-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 4px;
}

.lesson-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: #6b6355;
}

.lesson-figure figcaption a {
  color: #8a6420;
}

.lesson-content .lesson-list-names {
  max-width: 760px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.lesson-content .lesson-list-names strong {
  color: var(--ink);
}

.lesson-gamaka-demo {
  max-width: 760px;
  list-style: none;
  margin: 16px 0 26px;
  padding: 0;
}

.lesson-gamaka-demo li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.9;
}

.lesson-gamaka-demo .ex-play {
  flex-shrink: 0;
  margin-top: 1px;
}

/* ---------- Notation grid ---------- */

.notation-block {
  margin: 16px 0 30px;
  overflow-x: auto;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-soft) 100%);
  padding: 16px 18px;
}

.notation-block .ex-number {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.notation-block .ex-number:not(:first-child) {
  margin-top: 18px;
}

.ex-play {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--brass-dim);
  background: transparent;
  color: var(--brass);
  font-size: 10px;
  line-height: 1;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.ex-play:hover {
  border-color: var(--brass);
  background: rgba(201, 162, 74, 0.12);
}

.ex-play.playing {
  background: var(--brass);
  border-color: var(--brass);
  color: var(--bg-soft);
}

.staircase-play-row {
  text-align: center;
  margin: 4px 0 0;
}

/* Free-tempo patterns with no talam (warmup arches, pyramids): each row
   centers independently rather than sitting in a left-aligned table. */
.notation-pyramid {
  text-align: center;
}

.pyramid-row {
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 16px;
  color: var(--ink);
  padding: 3px 0;
  white-space: nowrap;
  letter-spacing: 0.3px;
}

/* ---------- Tala hand-gesture diagram ---------- */

.tala-gesture {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 16px 0 26px;
  padding: 18px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-soft) 100%);
}

.tala-gesture-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 14px;
  border-right: 1px dashed var(--card-border);
}

.tala-gesture-group:last-child {
  border-right: none;
}

.tala-gesture-group-label {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 4px;
  white-space: nowrap;
}

.tala-gesture-symbol {
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 22px;
  color: var(--brass);
  margin-bottom: 8px;
}

.tala-gesture-beats {
  display: flex;
  gap: 12px;
}

.tala-beat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.tala-beat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  color: var(--brass);
}

.tala-beat-icon svg {
  width: 20px;
  height: 20px;
  display: block;
}

.tala-count {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--brass);
  color: var(--brass);
  font-family: "Inter", sans-serif;
  font-size: 11px;
  font-weight: 600;
}

.tala-beat-caption {
  font-size: 11px;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ---------- Arohana/avarohana staircase diagram ---------- */

.staircase-pair {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 18px 0 28px;
}

.staircase {
  display: flex;
  align-items: flex-end;
  gap: 4px;
}

.staircase-step {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-soft) 100%);
  border: 1px solid var(--card-border);
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 13px;
  color: var(--ink);
  margin-bottom: calc(var(--i) * 14px);
}

/* ---------- Melakarta explorer ---------- */

.mk-explorer {
  margin: 16px 0 28px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-soft) 100%);
  overflow: hidden;
}

.mk-wheel {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  touch-action: none;
}

.mk-wheel svg {
  display: block;
}

/* The raga-name labels sit just outside the outer ring, on open canvas —
   every other label in the wheel is painted on its own fixed-color wedge
   and stays legible regardless of theme, but this one is exposed to
   whatever's behind it, so it needs to track the theme like normal text. */
.mk-wheel-raga-label {
  fill: var(--brass);
}

.mk-wheel-raga-arc:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: -2px;
}

.mk-search {
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding: 12px 18px;
  border: none;
  border-bottom: 1px solid var(--card-border);
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
}

.mk-search::placeholder {
  color: var(--ink-soft);
}

.mk-search:focus {
  outline: none;
  background: rgba(201, 162, 74, 0.06);
}

.mk-split {
  display: flex;
  align-items: stretch;
}

.mk-split .mk-wheel {
  flex: 7;
  min-width: 0;
  border-bottom: none;
  border-right: 1px solid var(--card-border);
}

.mk-detail {
  flex: 3;
  min-width: 0;
  padding: 16px 20px;
  position: sticky;
  top: 90px;
  align-self: flex-start;
}

.mk-detail-empty {
  color: var(--ink-soft);
  font-size: 13px;
  font-style: italic;
}

.mk-detail-heading {
  margin: 0 0 4px;
  font-family: "Playfair Display", "Georgia", serif;
  font-size: 17px;
  color: var(--brass);
  font-weight: 700;
}

.mk-detail .notation-block {
  margin: 8px 0 0;
  padding: 10px 14px;
}

.mk-extra-label {
  margin: 16px 0 3px;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.mk-extra-value {
  margin: 0;
  font-size: 13px;
  color: var(--ink);
}

.mk-extra-note {
  margin: 0;
  font-size: 12px;
  font-style: italic;
  color: var(--ink-soft);
}

.mk-comp-list {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.6;
}

/* ---------- Search by swara ---------- */

.mk-swara-search {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin: 16px 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-soft) 100%);
}

.mk-swara-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mk-swara-field label {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.mk-swara-select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--ink);
  font-family: inherit;
  font-size: 13px;
}

.mk-swara-find-btn {
  padding: 8px 18px;
  border-radius: 50px;
  border: 1px solid var(--brass-dim);
  background: transparent;
  color: var(--brass);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.mk-swara-find-btn:hover {
  border-color: var(--brass);
  background: rgba(201, 162, 74, 0.12);
}

.mk-swara-result {
  flex-basis: 100%;
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

@media (max-width: 700px) {
  .mk-split {
    flex-direction: column;
  }

  .mk-split .mk-wheel {
    border-right: none;
    border-bottom: 1px solid var(--card-border);
  }

  .mk-detail {
    position: static;
  }
}

table.swara-grid {
  border-collapse: collapse;
  font-family: "Playfair Display", "Georgia", serif;
}

table.swara-grid td {
  padding: 3px 16px;
  text-align: center;
  font-size: 16px;
  color: var(--ink);
  border-right: 1px solid var(--card-border);
  white-space: nowrap;
}

/* Marks the last beat-group of an avartanam (talam cycle) — appears both
   mid-row, when a printed line bundles more than one avartanam, and at
   the row's true end. */
table.swara-grid td.avartana-end {
  border-right: none;
  padding-right: 16px;
  position: relative;
}

table.swara-grid td.avartana-end::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 2px;
  bottom: 2px;
  border-right: 2px solid var(--brass-dim);
}

table.swara-grid tr.sahitya-row td {
  font-family: "Inter", sans-serif;
  font-style: italic;
  font-size: 13px;
  color: var(--ink-soft);
  border-right: 1px dashed transparent;
  padding-top: 0;
  padding-bottom: 10px;
}

table.swara-grid tr.sahitya-row td.avartana-end::after {
  display: none;
}

/* Tara-sthayi (upper octave) marker: a CSS-drawn dot above the letter.
   Unicode combining marks don't reliably stack on Telugu conjunct glyphs
   (renders as tofu boxes in some fonts), so the dot is drawn here instead
   — this works identically for Latin and Telugu letters. Used both inside
   notation cells and inline in prose. */
.sw-tara {
  position: relative;
  display: inline-block;
}

.sw-tara::after {
  content: "";
  position: absolute;
  top: -0.24em;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

/* Mandra-sthayi (lower octave) marker: same idea, dot drawn below. */
.sw-mandra {
  position: relative;
  display: inline-block;
}

.sw-mandra::after {
  content: "";
  position: absolute;
  bottom: -0.14em;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- Placeholder ("coming soon") lesson ---------- */

.lesson-soon {
  text-align: center;
  padding: 70px 20px;
  border: 1px dashed var(--brass-dim);
  border-radius: 14px;
}

.lesson-soon .icon {
  font-size: 44px;
  margin-bottom: 12px;
}

.lesson-soon .badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  border: 1px dashed var(--brass-dim);
  color: var(--brass-dim);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin: 14px 0 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .lessons-layout {
    flex-direction: column;
    padding: 20px 16px 60px;
  }

  .lessons-nav {
    width: 100%;
    position: static;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 10px;
  }

  .lessons-nav-content {
    display: none;
  }

  .lessons-nav.open .lessons-nav-content {
    display: block;
  }

  .lessons-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: var(--card);
    color: var(--ink);
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
  }

  .lesson-content h1 { font-size: 28px; }
}