/* tc-course.css
 *
 * Shared styles for the v2 course-platform pages (mi-curso, mi-curso-examen,
 * admin-curso-examen-editor, etp-roster). Layered on top of tc-shell.css —
 * every color uses a CSS variable from there, no hex literals.
 *
 * Pages should set <body data-tc-brand="ce"> for student-facing, "data" for
 * admin. The tokens consumed below come from tc-shell.css:
 *   --teal, --navy, --bg, --surface, --border, --text, --subtext, --muted,
 *   --success, --warning, --danger.
 */

/* The shared content wrapper. Pages drop their content under this. */
.tc-course-wrap { max-width: 1100px; margin: 24px auto; padding: 0 22px 80px; }
.tc-course-wrap--narrow { max-width: 820px; }

/* ───────── Hero card (top of mi-curso / mi-curso-examen) ───────── */
.course-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--teal) 100%);
  color: #fff; border-radius: var(--r-lg); padding: 28px 32px; margin-bottom: 24px;
  display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between;
}
.course-hero h1 { font-size: 1.5rem; font-weight: 800; margin: 0 0 4px; line-height: 1.2; }
.course-hero .sub { color: rgba(255,255,255,.78); font-size: .92rem; }
.course-hero .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.course-hero .chip {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--r-pill); padding: 4px 12px; font-size: .78rem; font-weight: 600;
}

/* ───────── Section header (label + count) ───────── */
.section { margin-bottom: 32px; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; margin-bottom: 12px;
}
.section-head h2 {
  font-size: .78rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase;
  color: var(--subtext); margin: 0;
}
.section-head .meta { font-size: .8rem; color: var(--muted); }

/* ───────── Card grid + person card ───────── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }

.person-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 14px 16px; display: flex; align-items: center; gap: 12px;
}
.person-card .avatar {
  width: 40px; height: 40px; border-radius: 12px;
  background: linear-gradient(135deg, var(--teal), var(--navy));
  color: #fff; font-weight: 800; font-size: .95rem; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.person-card .name { font-weight: 700; color: var(--text); font-size: .95rem; }
.person-card .role { font-size: .78rem; color: var(--muted); }

/* ───────── Exam list — card wraps the header row + attempt history ───────── */
.exam-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  margin-bottom: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.exam-card:hover { border-color: var(--teal); box-shadow: 0 4px 16px rgba(11,63,130,.05); }
/* Admin-only state: a closed exam (is_active=0) is muted so it visually
   recedes next to open exams the admin actually wants students to take. */
.exam-card.is-closed { opacity: .65; background: var(--surface-alt, #fafafa); }
.exam-card.is-closed:hover { opacity: 1; }

.exam-row {
  padding: 16px 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.exam-row .name { font-weight: 700; color: var(--navy); font-size: 1rem; }
.exam-row .sub  { font-size: .8rem; color: var(--muted); margin-top: 2px; }
.exam-row .right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

/* Per-attempt history list inside .exam-card */
.attempt-list { border-top: 1px solid var(--border); padding: 6px 18px 10px; }
.attempt-line {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: .85rem;
}
.attempt-line:last-child { border-bottom: 0; }
.attempt-line .meta  { color: var(--subtext); }
.attempt-line .right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.attempt-line .tc-btn { padding: 5px 12px; font-size: .78rem; }

/* ───────── Pills (status / score) ───────── */
.tc-pill {
  display: inline-block; padding: 3px 10px; border-radius: var(--r-pill);
  font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  background: rgba(0,97,212,.10); color: var(--teal);
}
.tc-pill.pass    { background: rgba(16,185,129,.14); color: var(--success); }
.tc-pill.fail    { background: rgba(220,38,38,.12); color: var(--danger); }
.tc-pill.pending { background: rgba(245,158,11,.16); color: var(--warning); }
.tc-pill.muted   { background: rgba(139,146,165,.14); color: var(--muted); }

/* ───────── Buttons (canonical, matches tc-shell.css .btn family) ───────── */
.tc-btn {
  border: 0; border-radius: 8px; padding: 8px 16px;
  font: inherit; font-size: .9rem; font-weight: 700; cursor: pointer;
  text-decoration: none; display: inline-block; transition: background .15s;
}
.tc-btn--primary { background: var(--teal); color: #fff; }
.tc-btn--primary:hover:not(:disabled) { background: var(--navy); }
.tc-btn--primary:disabled { background: var(--muted); cursor: not-allowed; }
.tc-btn--ghost   { background: var(--surface); color: var(--teal); border: 1.5px solid var(--teal); }
.tc-btn--ghost:hover { background: rgba(0,97,212,.06); }
.tc-btn--danger  { background: transparent; color: var(--danger); border: 1.5px solid rgba(220,38,38,.4); }
.tc-btn--danger:hover { background: rgba(220,38,38,.06); }
.tc-btn--lg { padding: 12px 22px; font-size: .95rem; border-radius: var(--r-md); }

/* ───────── Exam-taking question card ───────── */
.q-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 22px 24px; margin-bottom: 14px;
}
.q-card .q-label {
  font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 8px;
}
.q-card .q-text {
  background: var(--teal); color: #fff; padding: 14px 18px; border-radius: var(--r-md);
  font-size: 1.04rem; font-weight: 600; line-height: 1.45; margin-bottom: 12px;
}
.opt {
  background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--r-md);
  padding: 14px 18px; margin-bottom: 8px; cursor: pointer; font-size: .94rem;
  color: var(--text); transition: all var(--motion-quick);
}
.opt:hover     { border-color: var(--teal); background: rgba(0,97,212,.03); }
.opt.selected  { border-color: var(--teal); background: rgba(0,97,212,.08); font-weight: 600; color: var(--navy); }
.opt.correct   { border-color: var(--success); background: rgba(16,185,129,.08); }
.opt.wrong     { border-color: var(--danger);  background: rgba(220,38,38,.06); }

/* ───────── Progress bar (used in exam header) ───────── */
.progress      { flex: 1; max-width: 320px; }
.progress-bar  { height: 6px; background: var(--border); border-radius: var(--r-sm); overflow: hidden; margin-bottom: 4px; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--teal), var(--success)); transition: width var(--motion-slow); }
.progress-label{ font-size: .78rem; color: var(--muted); text-align: right; }

/* ───────── Result card (pass/fail at top of completed exam) ───────── */
.result-card {
  background: var(--surface); border: 2px solid var(--success); border-radius: var(--r-lg);
  padding: 26px; text-align: center; margin-bottom: 18px;
}
.result-card.fail { border-color: var(--danger); }
.result-card .score { font-size: 3rem; font-weight: 900; color: var(--success); line-height: 1; }
.result-card.fail .score { color: var(--danger); }
.result-card .msg   { font-size: 1rem; color: var(--text); margin: 12px 0 4px; font-weight: 600; }
.result-card .sub   { font-size: .85rem; color: var(--muted); }

/* ───────── Submit bar (sticky bottom on exam page) ───────── */
.submit-bar {
  position: sticky; bottom: 0; background: var(--bg); z-index: 5;
  padding: 14px 0 4px; margin-top: 18px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
}

/* ───────── Live-session row (12 entries on mi-curso) ───────── */
.session-row {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; margin-bottom: 8px;
  display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center;
}
.session-row.is-today { border-color: var(--teal); box-shadow: 0 4px 16px rgba(0,97,212,.08); }
/* Past sessions: dim only the descriptive text, NOT the action buttons, so
   "Revisar material" stays clearly blue and obviously still clickable
   (a row-level opacity caps child opacity and greyed the button). 2026-06-13 */
.session-row.is-past .meta,
.session-row.is-past .name,
.session-row.is-past .when { opacity: .55; }
.session-row.is-live  { border-color: var(--danger); box-shadow: 0 4px 16px rgba(220,38,38,.12); opacity: 1; }
.session-row .meta    { font-size: .76rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.session-row .name    { font-weight: 700; color: var(--navy); font-size: 1rem; margin: 2px 0; }
.session-row .when    { font-size: .82rem; color: var(--subtext); }
.session-row .actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.session-row .actions .tc-btn { padding: 6px 14px; font-size: .82rem; }
.session-row .badge-today {
  display: inline-block; background: var(--teal); color: #fff;
  font-size: .68rem; font-weight: 800; letter-spacing: .08em;
  padding: 2px 8px; border-radius: var(--r-pill); margin-left: 6px; vertical-align: middle;
}
/* Admin-only marker: this session is held back from students (SESSION_HOLD). */
.session-row .badge-held {
  display: inline-block; background: rgba(217,119,6,.14); color: #b45309;
  font-size: .68rem; font-weight: 800; letter-spacing: .04em;
  padding: 2px 8px; border-radius: var(--r-pill); margin-left: 6px; vertical-align: middle;
  text-transform: none;
}
/* Pulsing "● LIVE" pill — mirrors etp-facilitator's affordance so students
   visually recognize the same cue. Only rendered when the lesson has a
   matching etp_sessions_live row in state='running'. */
.session-row .badge-live {
  display: inline-block; background: var(--danger, var(--danger)); color: #fff;
  font-size: .68rem; font-weight: 800; letter-spacing: .08em;
  padding: 2px 8px; border-radius: var(--r-pill); margin-left: 6px; vertical-align: middle;
  animation: tc-live-pulse 1.6s ease-in-out infinite;
}
@keyframes tc-live-pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .6; }
}

/* Admin-only "remove this student" × button — appears on person-card */
.person-card .rm-btn {
  margin-left: auto; border: 0; background: transparent; cursor: pointer;
  color: var(--muted); font-size: 1rem; padding: 4px 8px; border-radius: var(--r-sm);
  line-height: 1;
}
.person-card .rm-btn:hover { background: rgba(220,38,38,.08); color: var(--danger); }

/* ───────── Empty / loading / error ───────── */
.tc-empty {
  background: var(--surface); border: 1px dashed var(--border); border-radius: 12px;
  padding: 24px; text-align: center; color: var(--muted); font-size: .9rem;
}
.tc-loading { padding: 40px; text-align: center; color: var(--muted); }
.tc-err     { background: rgba(220,38,38,.06); border: 1px solid rgba(220,38,38,.25); border-radius: var(--r-md); padding: 14px 16px; color: var(--danger); }

/* ───────── Responsive — stack the exam-row action under name on phones ───────── */
@media (max-width: 600px) {
  .course-hero { padding: 20px 22px; }
  .exam-row { flex-direction: column; align-items: stretch; }
  .exam-row .right { justify-content: flex-end; }
  .session-row { grid-template-columns: 1fr; }
  .session-row .actions { justify-content: stretch; }
}