/* ============================================================
   Courses Page Stylesheet
   ============================================================ */


/* ----- Page Header ----------------------------------------- */

.courses-page {
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: white;

  text-align: center;
  padding-block: 0;
}

.courses-page__subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto;
}


/* ===================== COURSE HERO ===================== */

.course-hero {
  position: relative;
  min-height: 280px;

  display: flex;
  align-items: center;
  justify-content: center;

  text-align: center;
  color: #ffffff;

  background-image:
    linear-gradient(rgba(248, 250, 252, 0.5), rgba(248, 250, 252, 0.9)),
    url("../assets/images/body-background.png");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.course-hero__overlay {
  position: absolute;
  inset: 0;

  background:
    linear-gradient(
      180deg,
      rgba(15, 23, 42, 0.84),
      rgba(15, 23, 42, 0.9)
    );

  z-index: 0;
}

.course-hero__content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding-inline: 1.25rem;
}

.course-hero h1 {
  color: #ffffff;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-family: 'Orbitron', sans-serif;
  margin-bottom: 0;
}

.course-hero__content p {
  color: rgba(255, 255, 255, 0.95);
}


/* ----- Courses Section ------------------------------------ */

.courses-listing {
  padding: 4rem 0;
  background-color: var(--color-bg);
}

.courses-listing .container,
.featured-courses .container {
  max-width: 1320px;
}

.courses-listing .section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1rem;
  text-align: center;
}


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

.course-search {
  max-width: 860px;
  margin: 0 auto 2rem;
  padding: 1.25rem;

  border-radius: 1.25rem;
  background:
    linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.95),
      rgba(248, 250, 252, 0.9)
    );

  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(10px);
}

.course-search__form {
  display: grid;
  gap: 0.75rem;
}

.course-search__label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

.course-search__controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;

  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 999px;
  padding-left: 1.25rem;
}

.course-search__input {
  flex: 1 1 320px;
  min-height: 52px;

  border: none;
  background: transparent;

  font-size: 1rem;
  color: var(--color-text);

  transition: border-color var(--transition), box-shadow var(--transition);
}

.course-search__input:focus {
  outline: none;
  border: none;
}

.course-search__controls::placeholder {
  color: var(--color-muted);
}

.course-search__controls:focus {
  outline: none;
  border: none;
  box-shadow: 0 0 0 4px rgba(0, 86, 179, 0.12);
}

.course-search__clear {
  min-height: 52px;
  padding: 0 1.25rem;
  margin-right: 0;

  border: none;
  border-radius: 999px;

  background: transparent;
  color: var(--color-text);

  font-weight: 700;
  cursor: pointer;

  transition:
    transform var(--transition),
    background-color var(--transition),
    border-color var(--transition);
}

.course-search__clear:hover {
  background: rgba(15, 23, 42, 0.05);
  border-color: rgba(148, 163, 184, 0.5);
}

.course-search__input::-webkit-search-decoration,
.course-search__input::-webkit-search-cancel-button,
.course-search__input::-webkit-search-results-button,
.course-search__input::-webkit-search-results-decoration {
  display: none;
  -webkit-appearance: none;
}

.course-search__results {
  min-height: 1.5rem;
  margin: 0.75rem 0 0;

  color: var(--color-muted);
  font-size: 0.95rem;
}


/* ----- Courses Sidebar Layout ----------------------------- */

.courses-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  align-items: start;
  gap: 2rem;

  margin-top: 2.5rem;
}

.courses-sidebar {
  position: sticky;
  top: 110px;
  align-self: start;
}

.courses-sidebar__outer {
  background:
    linear-gradient(
      180deg,
      #ffffff 0%,
      #f3f8ff 100%
    );

  border: 1px solid #d8e4f3;
  border-radius: 1.5rem;

  padding: 1rem;

  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.08);
}

.courses-sidebar__inner {
  background: #f8fbff;
  border: 1px solid #e5edf7;
  border-radius: 1.2rem;

  padding: 1.25rem;
}

.courses-sidebar__title {
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;

  color: #64748b;
  margin-bottom: 1rem;
}

.courses-content {
  min-width: 0;
}


/* ----- Course Category Tabs ------------------------------- */

.course-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.course-tab {
  width: 100%;
  text-align: left;

  border: 1px solid rgba(148, 163, 184, 0.35);
  background: #ffffff;
  color: var(--color-text);

  padding: 0.9rem 1rem;
  border-radius: 0.9rem;

  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;

  cursor: pointer;

  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.course-tab:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateX(4px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.course-tab.is-active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.22);
}

.course-tab:focus,
.course-tab:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.18);
}


/* ----- Courses Grid ---------------------------------------- */

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;

  margin-top: 0;
}


/* ----- Course Card ----------------------------------------- */

.course-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);

  overflow: hidden;

  transition:
    transform var(--transition),
    box-shadow var(--transition);

  display: flex;
  flex-direction: column;
  height: 100%;

  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow:
    0 12px 16px -4px rgb(0 0 0 / .15),
    0 4px 6px -2px rgb(0 0 0 / .1);
}

.course-card__image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: #411396;
  overflow: hidden;
}

.course-card__image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.course-card__level {
  position: absolute;
  top: 12px;
  right: 12px;

  background-color: var(--color-primary);
  color: white;

  padding: 0.4rem 0.8rem;
  border-radius: 0.25rem;

  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.course-card__body {
  padding: 1.5rem;

  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);

  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.course-card__description {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.5;

  margin-bottom: 1.25rem;
  flex-grow: 1;

  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}

.course-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;

  margin-bottom: 1.5rem;
  padding-bottom: 1rem;

  border-bottom: 1px solid var(--color-border);
}

.course-card__meta-item {
  display: flex;
  justify-content: space-between;

  font-size: 0.9rem;
  color: var(--color-text);
}

.course-card__meta-item strong {
  color: var(--color-text);
  font-weight: 600;
}

.course-card__duration,
.course-card__trainer {
  color: var(--color-muted);
}

.course-card__footer {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;

  margin-top: auto;
}

.course-card__price {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
}

.course-card__button {
  width: 100%;

  background-color: var(--color-primary);
  color: white;

  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);

  font-weight: 600;
  cursor: pointer;

  transition:
    background-color var(--transition),
    transform var(--transition);

  font-size: 0.9rem;
  white-space: nowrap;
}

.course-card__button:hover {
  background-color: var(--color-primary-dark);
  transform: scale(1.05);
}

.course-card__button:active {
  transform: scale(0.98);
}


/* ----- Empty State ----------------------------------------- */

.courses-empty {
  text-align: center;
  padding: 3rem;
  color: var(--color-muted);
}

.courses-empty__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.courses-empty__text {
  font-size: 1.1rem;
}

.courses-grid .courses-empty__text {
  grid-column: 1 / -1;
}


/* ----- Featured Courses On Index Page ---------------------- */

.featured-courses {
  padding: 4rem 0;
  background-color: rgba(255, 255, 255, 0.8);
}

.featured-courses-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;

  margin-top: 2rem;
}


/* ----- Buttons --------------------------------------------- */

.btn {
  display: inline-block;

  padding: 0.6rem 1.1rem;
  border-radius: 999px;

  text-decoration: none;
  font-weight: 700;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}


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

@media (max-width: 1200px) {
  .courses-layout {
    grid-template-columns: 240px 1fr;
  }

  .courses-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 992px) {
  .courses-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .courses-sidebar {
    position: static;
  }

  .courses-sidebar__outer {
    padding: 0.85rem;
  }

  .courses-sidebar__inner {
    padding: 1rem;
  }

  .course-tabs {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .course-tab {
    width: auto;
    text-align: center;
    padding: 0.75rem 1.1rem;
  }

  .course-tab:hover {
    transform: translateY(-2px);
  }

  .courses-grid {
    margin-top: 0;
  }
}

@media (max-width: 768px) {
  .course-search {
    padding: 1rem;
    border-radius: 1rem;
  }

  .course-search__controls {
    width: 100%;
    gap: 0.5rem;
    padding: 0.5rem 0.65rem 0.5rem 1rem;
    border-radius: 999px;

    display: flex;
    flex-wrap: nowrap;
    align-items: center;
  }

  .course-search__input {
    min-height: 44px;
    min-width: 0;
    width: auto;
    flex: 1 1 auto;
  }

  .course-search__clear {
    flex: 0 0 auto;
    min-height: 44px;
    width: auto;

    padding: 0 0.9rem;

    white-space: nowrap;
    text-align: center;

    -webkit-tap-highlight-color: transparent;
  }

  .course-search__clear:focus,
  .course-search__clear:focus-visible,
  .course-search__clear:active {
    outline: none;
    box-shadow: none;
    background: rgba(15, 23, 42, 0.05);
    border-color: rgba(148, 163, 184, 0.5);
  }

  .courses-sidebar__outer {
    border-radius: 1.2rem;
  }

  .courses-sidebar__inner {
    border-radius: 1rem;
  }

  .course-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 0.45rem;
  }

  .course-tab {
    flex: 0 0 auto;
    white-space: nowrap;
  }

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

  .featured-courses-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .courses-listing {
    padding: 3rem 0;
  }

  .course-search {
    margin-bottom: 1.5rem;
  }

  .courses-layout {
    margin-top: 1.75rem;
  }

  .courses-sidebar__outer {
    padding: 0.7rem;
  }

  .courses-sidebar__inner {
    padding: 0.85rem;
  }

  .courses-sidebar__title {
    font-size: 0.85rem;
  }

  .course-tab {
    padding: 0.65rem 0.9rem;
    font-size: 0.9rem;
  }

  .course-card__image-wrapper {
    height: 180px;
  }

  .course-card__body {
    padding: 1.25rem;
  }

  .course-card__title {
    font-size: 1.08rem;
  }
}

@media (max-width: 1024px) {
  .featured-courses-grid {
    grid-template-columns: repeat(1, minmax(200px, 1fr));
  }
}

/* ===================== MOBILE FILTER BUTTON ===================== */

.course-filter-toggle {
  display: none;
}


/* Desktop/tablet sidebar default */
.courses-sidebar {
  transition: max-height var(--transition), opacity var(--transition);
}


/* Mobile filter behavior */
@media (max-width: 768px) {
  .course-filter-toggle {
    width: 100%;

    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;

    padding: 0.85rem 1rem;
    margin-bottom: 1rem;

    border: 1px solid rgba(148, 163, 184, 0.35);
    border-radius: 999px;

    background: #ffffff;
    color: var(--color-text);

    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 800;

    cursor: pointer;

    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);

    transition:
      background-color var(--transition),
      color var(--transition),
      border-color var(--transition),
      box-shadow var(--transition);
  }

  .course-filter-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
  }

  .course-filter-toggle.is-open {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.22);
  }

  .course-filter-toggle i {
    font-size: 0.95rem;
  }

  .courses-sidebar {
    width: 100%;

    max-height: 0;
    opacity: 0;
    overflow: hidden;

    pointer-events: none;
  }

  .courses-sidebar.is-open {
    max-height: 500px;
    opacity: 1;

    pointer-events: auto;
    margin-bottom: 1.25rem;
  }

  .courses-sidebar__outer {
    padding: 0.8rem;
    border-radius: 1.2rem;
  }

  .courses-sidebar__inner {
    padding: 0.85rem;
    border-radius: 1rem;
  }

  .course-tabs {
    flex-direction: column;
    flex-wrap: nowrap;
    overflow: visible;
    padding-bottom: 0;
  }

  .course-tab {
    width: 100%;
    text-align: left;
  }
}