/* TG6-Dev · AI Training — course platform layout.
 * Reuses tokens + components from ../styles.css; only adds platform-specific UI.
 */

/* ---- shared progress bar ---- */
.progress {
  display: flex;
  align-items: center;
  gap: 14px;
}
.progress .track {
  flex: 1;
  height: 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}
.progress .fill {
  height: 100%;
  width: 0;
  background: var(--grad);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.progress .label {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

/* ---- dashboard ---- */
.dash-head {
  padding: 48px 0 24px;
}
.dash-head .eyebrow {
  margin-bottom: 10px;
}
.dash-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.dash-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.module {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
}
.module > header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 4px;
}
.module .num {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--cyan);
}
.module h2 {
  font-size: 1.2rem;
  margin: 0;
}
.module .summary {
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 0.96rem;
}
.lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.lesson-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--ink);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.lesson-row:hover {
  background: var(--panel);
  border-color: var(--accent);
}
.lesson-row .tick {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--line);
  display: grid;
  place-items: center;
  color: transparent;
}
.lesson-row.done .tick {
  border-color: var(--accent);
  background: var(--accent);
  color: #04130a;
}
.lesson-row .l-title {
  flex: 1;
  font-weight: 500;
}
.lesson-row .l-dur {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
}

/* ---- lesson reader ---- */
.reader {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 28px 0 60px;
  align-items: start;
}
@media (min-width: 920px) {
  .reader {
    grid-template-columns: 280px 1fr;
    gap: 40px;
  }
}

.toc {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  position: sticky;
  top: 84px;
}
.toc .toc-mod {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 16px 6px 6px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.toc .toc-mod:first-child {
  margin-top: 4px;
  border-top: none;
  padding-top: 0;
}
.toc a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.92rem;
}
.toc a:hover {
  background: var(--panel);
}
.toc a.current {
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent);
}
.toc a .dot {
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--line);
}
.toc a.done .dot {
  border-color: var(--accent);
  background: var(--accent);
}

.lesson-main {
  min-width: 0;
}
.lesson-main .crumb {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 8px;
}
.lesson-main h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
.lesson-main .objective {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 24px;
}
.video-ph {
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: var(--radius);
  border: 1px dashed var(--line);
  background: var(--panel);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 26px;
}
.lesson-body {
  max-width: 680px;
}
.lesson-body p {
  font-size: 1.06rem;
  margin: 0 0 16px;
}
.lesson-body pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0 0 18px;
}
.lesson-body code {
  font-family: var(--mono);
  font-size: 0.92rem;
}
.lesson-body p code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 0.88rem;
}
.lesson-body pre code {
  color: var(--ink);
}
.lesson-body .draft {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 16px 18px;
  color: var(--muted);
  font-size: 0.96rem;
}

.tasks {
  margin: 30px 0;
  max-width: 680px;
}
.tasks h3 {
  font-size: 1.05rem;
  margin: 0 0 12px;
}
.tasks ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.tasks li {
  padding: 9px 0 9px 30px;
  position: relative;
  color: var(--ink);
}
.tasks li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.lesson-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.lesson-nav .spacer {
  flex: 1;
}
.btn[disabled] {
  opacity: 0.4;
  pointer-events: none;
}