/* ==========================================================================
   components.css - Button, card, badge, link, media dùng lại toàn site
   ========================================================================== */

/* ------------------------------------------------------------- Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn svg {
  flex: none;
}

.btn--primary {
  background-color: var(--color-gold);
  color: var(--color-navy);
  box-shadow: var(--shadow-xs);
}

.btn--primary:hover {
  background-color: #d49f45;
  color: var(--color-navy);
}

.btn--primary:active {
  transform: translateY(1px);
}

/* Nút vàng có chuyển sắc nhẹ - dùng trong card khoá học */
.btn--gold-soft {
  background-image: linear-gradient(180deg, #f0c475 0%, #e4af5e 100%);
  color: var(--color-navy);
  border: 1px solid #dcac5d;
  box-shadow: var(--shadow-xs);
}

.btn--gold-soft:hover {
  background-image: linear-gradient(180deg, #edbc63 0%, #dda44e 100%);
  color: var(--color-navy);
}

.btn--outline {
  background-color: #fff;
  color: var(--color-navy);
  border: 1.5px solid #8fa6c6;
}

.btn--outline:hover {
  border-color: var(--color-navy);
  background-color: #f7f9fc;
  color: var(--color-navy);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-on-dark);
  border: 1.5px solid rgba(255, 255, 255, 0.55);
}

.btn--outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
}

.btn--youtube {
  background-color: var(--color-gold);
  color: var(--color-navy);
  padding-left: 18px;
}

.btn--block {
  display: flex;
  width: 100%;
}

.btn--sm {
  min-height: 42px;
  padding: 0 18px;
  font-size: 16px;
}

/* ------------------------------------------------- Link kèm mũi tên */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--color-navy);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(0, 21, 73, 0.35);
}

.link-arrow svg {
  transition: transform var(--dur) var(--ease);
}

.link-arrow:hover {
  color: var(--color-accent);
  text-decoration-color: currentColor;
}

.link-arrow:hover svg {
  transform: translateX(3px);
}

/* -------------------------------------------------------------- Badge */
.badge {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 12px;
  border-radius: var(--radius-xs);
  background-color: var(--color-gold);
  color: var(--color-navy);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge--ghost {
  background-color: transparent;
  border: 1px solid var(--color-gold-dark);
  color: var(--color-accent);
}

/* --------------------------------------------------------------- Card */
.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__media {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: #eef1f5;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 12px;
  padding: 18px 20px 20px;
}

/* ------------------------------------------------------- Media object */
.media {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.media__figure {
  flex: none;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: #eef1f5;
}

.media__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__body {
  min-width: 0;
}

/* ------------------------------------------------------------- Meta */
.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
}

.meta__date {
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
}

/* -------------------------------------------------------- Icon tròn */
.icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.icon-badge img,
.icon-badge svg {
  display: block;
}

/* ------------------------------------------------------- Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  color: var(--color-text-soft);
  padding-block: 14px;
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb__sep {
  opacity: 0.55;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
}

/* ------------------------------------------------------- Phân trang */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-8);
}

.pagination__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
  background-color: #fff;
}

.pagination__item:hover {
  border-color: var(--color-gold-dark);
  color: var(--color-navy);
}

.pagination__item[aria-current="page"] {
  background-color: var(--color-gold);
  border-color: var(--color-gold-dark);
  color: var(--color-navy);
}

.pagination__item--disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* ---------------------------------------------------------- Form cơ bản */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field__label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-navy);
}

.input,
.textarea,
.select {
  width: 100%;
  min-height: 46px;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: #fff;
  font-size: var(--fs-sm);
  color: var(--color-text);
}

.textarea {
  min-height: 130px;
  resize: vertical;
}

.input::placeholder,
.textarea::placeholder {
  color: #9aa7c0;
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-gold-dark);
  box-shadow: 0 0 0 3px rgba(224, 170, 82, 0.2);
}

/* ------------------------------------------------------- Search form */
.search-form {
  display: flex;
  gap: 10px;
  max-width: 560px;
}

.search-form .input {
  flex: 1;
}