/*
  Vzhled placené části videokurzů.
  Soubor je záměrně oddělený od PHP logiky, aby šel portál bezpečně vizuálně upravovat.
*/

:root {
  --portal-blue: #123a5f;
  --portal-blue-dark: #0d2d4d;
  --portal-sky: #e8f6ff;
  --portal-orange: #ff8a16;
  --portal-orange-dark: #ef7600;
  --portal-ink: #102033;
  --portal-muted: #667085;
  --portal-line: #dfe7f1;
  --portal-bg: #f6f8fb;
  --portal-soft: #f8fbff;
  --portal-success: #087f5b;
  --portal-danger: #b42318;
}

body {
  background:
    radial-gradient(circle at 8% 6%, rgba(46, 166, 214, .20), transparent 30%),
    radial-gradient(circle at 92% 0%, rgba(255, 138, 22, .20), transparent 30%),
    linear-gradient(180deg, #ffffff 0%, #f6f9fc 46%, #f8fafc 100%) !important;
}

.wrap {
  padding-top: 28px !important;
}

.topbar {
  box-shadow: 0 8px 28px rgba(16, 32, 51, .045);
}

.brand-title {
  color: #143457 !important;
}

.brand-subtitle {
  color: #64748b !important;
}

.page-hero {
  min-height: auto;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(232, 246, 255, .88)),
    linear-gradient(90deg, rgba(18, 58, 95, .05), transparent) !important;
  border-color: rgba(196, 216, 232, .95) !important;
}

.portal-login {
  max-width: 980px;
  margin: 22px auto 0;
}

.portal-login .page-hero {
  min-height: 460px;
}

.portal-login .form-card {
  align-self: center;
  width: 100%;
}

.portal-login-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 18px;
  padding: 14px;
  border: 1px solid #dbe9f5;
  border-radius: 16px;
  background: #f8fbff;
  color: #526071;
  font-size: .94rem;
}

.portal-login-note::before {
  content: "i";
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  border-radius: 999px;
  background: #e8f6ff;
  color: #155f8a;
  font-weight: 900;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.stat-card {
  display: flex;
  gap: 14px;
  align-items: center;
  min-height: 112px;
}

.stat-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  border-radius: 17px;
  background: linear-gradient(135deg, #e8f6ff, #fff3df);
  color: var(--portal-blue);
  font-weight: 950;
  font-size: 1.05rem;
}

.stat-label {
  display: block;
  color: var(--portal-muted);
  font-size: .92rem;
}

.stat-value {
  display: block;
  color: var(--portal-ink);
  font-size: 1.28rem;
  font-weight: 950;
  letter-spacing: -.03em;
}

.course-card {
  display: flex;
  flex-direction: column;
  min-height: 215px;
}

.course-card .btn {
  margin-top: auto;
}

.course-card h3 {
  font-size: 1.28rem;
}

.course-card-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 8px;
}

.course-badge,
.lesson-number {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 34px;
  padding: 0 10px;
  border-radius: 999px;
  background: #eaf8f0;
  color: var(--portal-success);
  font-weight: 950;
  font-size: .84rem;
}

.lesson-card {
  padding: 0 !important;
  overflow: hidden;
}

.single-video-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.current-lesson-card {
  position: relative;
  z-index: 1;
  margin-bottom: 0 !important;
}

.current-lesson-head {
  margin-bottom: 16px;
}

.video-frame-main {
  position: relative;
  margin: 0 !important;
  width: 100%;
  min-height: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #07111f;
  clear: both;
}

.video-frame-main .video {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.video-frame-main.is-empty .video {
  opacity: .08;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 24px;
  color: #dbeafe;
  text-align: center;
  background:
    radial-gradient(circle at center, rgba(27, 159, 211, .22), transparent 44%),
    linear-gradient(135deg, rgba(7, 17, 31, .72), rgba(7, 17, 31, .92));
}

.video-placeholder strong {
  color: #fff;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.video-placeholder span {
  max-width: 420px;
}

.lesson-list {
  display: grid;
  gap: 14px;
  position: relative;
  z-index: 2;
  width: 100%;
  margin-top: 2px;
  clear: both;
}

.lesson-list-head {
  padding: 4px 2px 2px;
}

.lesson-list-head h2 {
  margin-bottom: 6px !important;
}

.lesson-list-head p {
  margin-bottom: 0;
}

.lesson-list-item {
  border-color: #dfe7f1 !important;
  background: #fff !important;
  color: var(--portal-ink);
  opacity: 1;
}

.lesson-list-item .lesson-header {
  align-items: center;
}

.lesson-list-item.is-active {
  border-color: #1b9fd3 !important;
  box-shadow: 0 18px 42px rgba(27, 159, 211, .14);
}

.lesson-list-item.is-active .lesson-number {
  background: linear-gradient(135deg, #ff8a16, #ffb15f);
  color: #191919;
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.lesson-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 22px 22px 16px;
}

.lesson-number {
  background: linear-gradient(135deg, #e8f6ff, #dbeafe);
  color: #155f8a;
}

.lesson-title {
  color: var(--portal-ink);
  margin-bottom: 6px !important;
}

.lesson-description {
  color: var(--portal-muted);
  margin-bottom: 0;
}

.video-frame {
  margin: 0 22px 22px !important;
  border-radius: 18px !important;
}

.portal-back {
  white-space: nowrap;
}

.empty-state {
  font-size: 1rem;
}

.empty-state strong {
  display: block;
  color: var(--portal-ink);
  margin-bottom: 4px;
}

.admin-help {
  border-left: 4px solid var(--portal-orange);
  padding: 12px 14px;
  border-radius: 12px;
  background: #fff8ef;
  color: #684000;
}

.table-wrap {
  box-shadow: 0 10px 25px rgba(16, 32, 51, .05);
}

@media (max-width: 820px) {
  .portal-login {
    margin-top: 0;
  }

  .portal-login .page-hero {
    min-height: auto;
  }

  .dashboard-stats {
    grid-template-columns: 1fr;
  }

  .course-card {
    min-height: auto;
  }

  .lesson-header {
    padding: 18px 18px 14px;
  }

  .video-frame {
    margin: 0 18px 18px !important;
  }

  .video-frame-main {
    margin: 0 !important;
    min-height: 0;
  }

  .lesson-actions .btn {
    width: 100%;
  }

  .portal-back {
    white-space: normal;
  }
}

/*
  Jednoduchý bezpečný layout detailu kurzu.
  Záměrně nepoužívá sticky/absolute překrývání pro seznam lekcí ani přehrávač.
*/

.course-page {
  display: block;
  width: 100%;
}

.course-hero {
  display: block;
  margin-bottom: 20px;
  padding: 26px;
  border: 1px solid rgba(223, 231, 241, .95);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(232, 246, 255, .9)),
    linear-gradient(90deg, rgba(18, 58, 95, .05), transparent);
  box-shadow: 0 18px 50px rgba(16, 32, 51, .09);
  color: var(--portal-ink);
}

.course-hero h1 {
  color: var(--portal-ink);
}

.course-hero p {
  max-width: 760px;
  margin-bottom: 0;
  color: #536273;
  font-size: 1.08rem;
}

.course-back-link {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--portal-blue);
  font-weight: 850;
  text-decoration: none;
}

.course-back-link:hover {
  text-decoration: underline;
}

.course-player-block {
  display: block;
  width: 100%;
  margin: 0 0 22px;
  padding: 22px;
  border: 1px solid var(--portal-line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(16, 32, 51, .07);
  color: var(--portal-ink);
}

.course-video-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  width: 100%;
  min-height: 280px;
  aspect-ratio: 16 / 9;
  padding: 24px;
  border-radius: 20px;
  background:
    radial-gradient(circle at center, rgba(27, 159, 211, .24), transparent 45%),
    linear-gradient(135deg, #102033, #07111f);
  color: #dbeafe;
  text-align: center;
}

.course-video-placeholder strong {
  display: block;
  color: #fff;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.course-video-placeholder span {
  display: block;
  max-width: 520px;
}

.course-video-player {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  background: #000;
  object-fit: contain;
}

.active-lesson-title {
  margin: 16px 0 0 !important;
  color: var(--portal-ink);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

.course-page .lesson-list {
  display: block;
  position: static;
  width: 100%;
  margin: 0;
  padding: 22px;
  border: 1px solid var(--portal-line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(16, 32, 51, .07);
  color: var(--portal-ink);
  opacity: 1;
}

.course-page .lesson-list h2 {
  margin: 0 0 16px !important;
  color: var(--portal-ink);
}

.course-page .lesson-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: 100%;
  margin: 0 0 12px;
  padding: 18px;
  border: 1px solid #dfe7f1;
  border-radius: 18px;
  background: #fff;
  color: var(--portal-ink);
  opacity: 1;
}

.course-page .lesson-item:last-child {
  margin-bottom: 0;
}

.course-page .lesson-item.is-active {
  border-color: #1b9fd3;
  background: #f5fbff;
  box-shadow: 0 12px 30px rgba(27, 159, 211, .13);
}

.course-page .lesson-number {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  min-width: 42px;
  padding: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #e8f6ff, #dbeafe);
  color: #155f8a;
  font-weight: 950;
}

.course-page .lesson-item.is-active .lesson-number {
  background: linear-gradient(135deg, #ff8a16, #ffb15f);
  color: #191919;
}

.course-page .lesson-content h3 {
  margin: 0 0 5px;
  color: var(--portal-ink);
  font-size: 1.12rem;
}

.course-page .lesson-content p {
  margin: 0;
  color: var(--portal-muted);
}

.lesson-play-button,
.lesson-open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 11px 18px;
  border: 0;
  border-radius: 999px;
  background: var(--portal-orange);
  color: #111;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(255, 138, 22, .18);
}

.lesson-play-button:hover,
.lesson-open-link:hover {
  background: var(--portal-orange-dark);
}

@media (max-width: 820px) {
  .course-hero,
  .course-player-block,
  .course-page .lesson-list {
    padding: 18px;
    border-radius: 20px;
  }

  .course-video-placeholder {
    min-height: 190px;
    border-radius: 16px;
  }

  .course-video-player {
    border-radius: 16px;
  }

  .course-page .lesson-item {
    grid-template-columns: 42px minmax(0, 1fr);
    align-items: start;
  }

  .course-page .lesson-play-button,
  .course-page .lesson-open-link {
    grid-column: 1 / -1;
    width: 100%;
  }
}

/*
  Finální prezentační layout detailu kurzu: vlevo lekce, vpravo jeden hlavní přehrávač.
  Tato pravidla jsou na konci souboru záměrně, aby přebila starší jednoduché varianty layoutu.
*/

.course-page {
  display: block;
  width: 100%;
  color: var(--portal-ink);
}

.course-learning-layout {
  display: grid;
  grid-template-columns: minmax(320px, 40%) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  width: 100%;
}

.course-lessons-column,
.course-player-column {
  min-width: 0;
}

.course-lessons-column {
  display: block;
}

.course-player-column {
  display: block;
}

.course-player-card {
  position: sticky;
  top: 110px;
  display: block;
  width: 100%;
  padding: 22px;
  border: 1px solid var(--portal-line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 18px 46px rgba(16, 32, 51, .10);
  color: var(--portal-ink);
}

.course-player-label {
  display: inline-flex;
  align-items: center;
  width: max-content;
  margin-bottom: 10px;
  padding: 7px 11px;
  border-radius: 999px;
  background: #eaf6ff;
  color: #155f8a;
  font-size: .82rem;
  font-weight: 850;
}

.course-player-card .active-lesson-title {
  margin: 0 0 16px !important;
  color: var(--portal-ink);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

.course-video-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 8px;
  width: 100%;
  min-height: auto;
  aspect-ratio: 16 / 9;
  padding: 22px;
  border-radius: 20px;
  background:
    radial-gradient(circle at center, rgba(27, 159, 211, .24), transparent 45%),
    linear-gradient(135deg, #102033, #07111f);
  color: #dbeafe;
  text-align: center;
}

.course-video-placeholder strong {
  display: block;
  color: #fff;
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.course-video-placeholder span {
  display: block;
  max-width: 440px;
}

.course-video-player {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border-radius: 20px;
  background: #000;
  object-fit: contain;
}

.course-column-head {
  display: block;
  margin-bottom: 14px;
  padding: 20px;
  border: 1px solid var(--portal-line);
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 10px 28px rgba(16, 32, 51, .06);
}

.course-column-head h2 {
  margin: 0 0 6px !important;
  color: var(--portal-ink);
}

.course-column-head p {
  margin: 0;
  color: var(--portal-muted);
}

.course-page .lesson-list {
  display: grid;
  position: static;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--portal-ink);
  opacity: 1;
}

.course-page .lesson-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  width: 100%;
  margin: 0;
  padding: 16px !important;
  border: 1px solid #dfe7f1;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(16, 32, 51, .055);
  color: var(--portal-ink);
  opacity: 1;
  overflow: visible;
  transform: none;
}

.course-page .lesson-card:hover {
  border-color: #b8d3ea;
  box-shadow: 0 16px 34px rgba(16, 32, 51, .09);
  transform: none;
}

.course-page .lesson-card.is-active {
  border-color: #1b9fd3;
  background: #f5fbff;
  box-shadow: 0 18px 40px rgba(27, 159, 211, .14);
}

.course-page .lesson-card .lesson-number {
  grid-row: span 2;
}

.course-page .lesson-content h3 {
  margin: 0 0 6px;
  color: var(--portal-ink);
  font-size: 1.08rem;
  line-height: 1.2;
}

.course-page .lesson-content p {
  margin: 0;
  color: var(--portal-muted);
  font-size: .95rem;
}

.course-page .lesson-play-button,
.course-page .lesson-open-link {
  grid-column: 2;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 9px 15px;
  border: 0;
  border-radius: 999px;
  background: var(--portal-orange);
  color: #111;
  font-size: .92rem;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 10px 18px rgba(255, 138, 22, .18);
}

.course-page .lesson-play-button:hover,
.course-page .lesson-open-link:hover {
  background: var(--portal-orange-dark);
}

@media (max-width: 900px) {
  .course-learning-layout {
    grid-template-columns: 1fr;
  }

  .course-player-column {
    order: -1;
  }

  .course-player-card {
    position: static;
  }
}

@media (max-width: 560px) {
  .course-learning-layout {
    gap: 16px;
  }

  .course-hero,
  .course-player-card,
  .course-column-head {
    padding: 18px;
    border-radius: 20px;
  }

  .course-page .lesson-card {
    grid-template-columns: 38px minmax(0, 1fr);
    padding: 14px !important;
  }

  .course-page .lesson-number {
    width: 38px;
    height: 38px;
    min-width: 38px;
  }

  .course-page .lesson-play-button,
  .course-page .lesson-open-link {
    grid-column: 1 / -1;
    width: 100%;
  }
}

.editable-admin-layout {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.editable-page-list {
  position: sticky;
  top: 98px;
}

.editable-page-links {
  display: grid;
  gap: 10px;
  margin: 14px 0 18px;
}

.editable-page-links a {
  display: block;
  padding: 12px 13px;
  border: 1px solid #dfe7f1;
  border-radius: 15px;
  background: #fff;
  color: var(--portal-ink, #102033);
  text-decoration: none;
}

.editable-page-links a:hover,
.editable-page-links a.is-active {
  border-color: #1b9fd3;
  background: #f5fbff;
}

.editable-page-links strong,
.editable-page-links span {
  display: block;
}

.editable-page-links span {
  margin-top: 3px;
  color: var(--portal-muted, #667085);
  font-size: .86rem;
}

.editable-content-textarea {
  min-height: 430px;
  font-family: Consolas, "SFMono-Regular", ui-monospace, monospace;
  line-height: 1.55;
}

.admin-help {
  margin: 14px 0;
  padding: 13px 15px;
  border: 1px solid #dbeafe;
  border-radius: 16px;
  background: #f5fbff;
  color: #27415f;
}

.markdown-example {
  overflow-x: auto;
  margin: 10px 0 0;
  padding: 12px 13px;
  border: 1px solid #d9e8f5;
  border-radius: 13px;
  background: #fff;
  color: #102033;
  font-family: Consolas, "SFMono-Regular", ui-monospace, monospace;
  font-size: .92rem;
  white-space: pre-wrap;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.settings-field label {
  margin-top: 0;
}

.term-edit-card {
  padding: 16px;
  border: 1px solid #dfe7f1;
  border-radius: 18px;
  background: #f8fbff;
  margin-bottom: 14px;
}

.term-edit-card-new {
  border-style: dashed;
  background: #fff;
}

@media (max-width: 820px) {
  .editable-admin-layout {
    grid-template-columns: 1fr;
  }

  .editable-page-list {
    position: static;
  }

  .editable-content-textarea {
    min-height: 320px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }
}