/* ============================================================
   COMPONENTS — shared UI components: button, card, schedule table,
   carousel, forms, skeleton.
   Load after common.css and before any page-specific CSS.
   ============================================================ */

@import 'tokens.css';

/* ================= Buttons ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 10px 26px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--fs-md);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.btn-primary,
.btn:not([class*="btn-"]) {
  background-color: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover,
.btn:not([class*="btn-"]):hover {
  background-color: var(--amber-600);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background-color: var(--accent);
  color: var(--on-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-dark {
  background-color: var(--navy-700);
  color: var(--on-dark);
}

.btn-dark:hover {
  background-color: var(--navy-800);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:disabled {
  opacity: .55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ================= Base card ================= */
.card {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-5);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ================= Course card ================= */
.course-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  border-top: 4px solid var(--accent);
  text-align: right;
}

.course-card h3 {
  margin: 0;
  font-size: var(--fs-lg);
  color: var(--navy-800);
}

.course-card .code {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--text-dim);
}

.course-card .info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  background-color: var(--navy-50);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
}

.course-card .info p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--text);
}

.course-card .info i {
  color: var(--accent);
  width: 18px;
  margin-left: var(--sp-1);
  text-align: center;
}

.course-card .price {
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--navy-800);
}

.course-card ul.syllabus {
  margin: 0;
  padding-right: var(--sp-5);
  font-size: var(--fs-sm);
  color: var(--text-dim);
  line-height: 2;
}

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

/* Multiple class options for one course */
.class-options {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.class-option {
  border: 1px solid var(--navy-100);
  border-radius: var(--radius);
  padding: var(--sp-3) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.class-option h4 {
  margin: 0 0 var(--sp-1);
  font-size: var(--fs-sm);
  color: var(--accent);
}

.class-option p {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--text-dim);
}

.class-option .btn {
  margin-top: var(--sp-2);
  padding: 6px 18px;
  font-size: var(--fs-sm);
}

/* ================= Schedule table ================= */
.table-card {
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.table-scroll {
  overflow-x: auto;
}

.program-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.program-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background-color: var(--navy-50);
  color: var(--navy-800);
  font-weight: 700;
  padding: var(--sp-3) var(--sp-4);
  text-align: center;
  white-space: nowrap;
  border-bottom: 2px solid var(--navy-100);
}

.program-table tbody td {
  padding: var(--sp-3) var(--sp-4);
  text-align: center;
  border-bottom: 1px solid var(--navy-50);
  color: var(--text);
}

.program-table tbody tr:nth-child(even) {
  background-color: var(--navy-50);
}

.program-table tbody tr:hover {
  background-color: var(--amber-100);
}

.program-table .course-name {
  font-weight: 700;
  color: var(--navy-800);
  direction: ltr;
}

.program-table .register-btn {
  background-color: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: var(--radius);
  padding: 7px 18px;
  font-family: inherit;
  font-size: var(--fs-sm);
  font-weight: 700;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
}

.program-table .register-btn:hover {
  background-color: var(--amber-600);
  color: #fff;
  transform: scale(1.06);
}

/* Hidden rows (revealed by "show more" button) */
.program-table tr.row-hidden { display: none; }

.table-actions {
  text-align: center;
  padding: var(--sp-4);
}

/* Mobile: table collapses to card layout */
@media (max-width: 768px) {
  .program-table thead { display: none; }

  .program-table tbody tr {
    display: block;
    margin: var(--sp-3);
    border: 1px solid var(--navy-100);
    border-radius: var(--radius);
    padding: var(--sp-2) 0;
    background-color: var(--surface) !important;
  }

  .program-table tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--sp-3);
    border: none;
    padding: var(--sp-1) var(--sp-4);
    text-align: left;
  }

  .program-table tbody td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--text-dim);
    font-size: var(--fs-xs);
  }

  .program-table tbody td:last-child {
    justify-content: center;
    padding-top: var(--sp-2);
  }
}

/* ================= Carousel ================= */
.carousel {
  position: relative;
}

.carousel-track {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--sp-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  padding: var(--sp-3) var(--sp-1);
  scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar { display: none; }

.carousel-track > * {
  scroll-snap-align: center;
  flex-shrink: 0;
}

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  margin-top: var(--sp-2);
}

.carousel-arrow {
  background-color: var(--surface);
  color: var(--navy-700);
  border: 1px solid var(--navy-100);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 1.5rem;
  line-height: 1;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 4px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition), color var(--transition);
}

.carousel-arrow:hover {
  background-color: var(--navy-700);
  color: var(--on-dark);
}

.carousel-dots {
  display: flex;
  gap: var(--sp-2);
}

.carousel-dots .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--navy-100);
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition);
}

.carousel-dots .dot.active {
  background-color: var(--accent);
  transform: scale(1.3);
}

/* ================= Forms ================= */
.form-control,
form input[type="text"],
form input[type="tel"],
form input[type="email"],
form input[type="number"],
form input[type="password"],
form input[type="file"],
form textarea,
form select {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--navy-100);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: var(--fs-md);
  color: var(--text);
  background-color: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus,
form input:focus,
form textarea:focus,
form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--amber-100);
}

form input.error,
form textarea.error {
  border-color: var(--error);
}

.error-text {
  color: var(--error);
  font-size: var(--fs-xs);
  margin-top: var(--sp-1);
  display: block;
}

.success-message {
  background-color: #e8f7ee;
  color: var(--success);
  border: 1px solid #bfe8cf;
  border-radius: var(--radius);
  padding: var(--sp-4);
  text-align: center;
  font-weight: 700;
}

/* ================= Badge ================= */
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--amber-100);
  color: var(--amber-600);
  font-size: var(--fs-xs);
  font-weight: 700;
}

/* ================= Skeleton / loading state ================= */
.skeleton {
  position: relative;
  overflow: hidden;
  background-color: var(--navy-50);
  border-radius: var(--radius);
  min-height: 16px;
}

.skeleton::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.65), transparent);
  animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
  from { transform: translateX(100%); }
  to   { transform: translateX(-100%); }
}

.load-state {
  text-align: center;
  color: var(--text-dim);
  padding: var(--sp-6);
  font-size: var(--fs-sm);
}

.load-state.error { color: var(--error); }