/* breadcrumb */
.pd-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .78rem;
    color: #9ca3af;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.pd-breadcrumb a { color: #6b7280; text-decoration: none; transition: color .15s; }
.pd-breadcrumb a:hover { color: var(--t-primary); }
.pd-bc-sep { font-size: .6rem; color: #d1d5db; }
.pd-bc-current { color: #374151; font-weight: 600; }

/* main layout */
.pd-main {
    display: flex;
    gap: 36px;
    margin-bottom: 40px;
    align-items: flex-start;
}
@media (max-width: 768px) { .pd-main { flex-direction: column; } }

/* image */
.pd-img-col { flex: 0 0 42%; max-width: 42%; }
@media (max-width: 768px) { .pd-img-col { flex: 0 0 100%; max-width: 100%; } }
.pd-img-box {
    position: relative;
    background: #f8fafc;
    border-radius: 18px;
    overflow: hidden;
    border: 1.5px solid var(--t-border);
    aspect-ratio: 4 / 3;
}
.pd-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform .4s;
}
.pd-img-box:hover .pd-img { transform: scale(1.03); }
.pd-img-placeholder {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #f9fafb;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #e5e7eb;
}
.pd-discount-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: var(--t-primary);
    color: #fff;
    font-size: .78rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 10px;
}

/* info */
.pd-info-col { flex: 1; }
.pd-cat-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    background: var(--t-primary-light);
    color: var(--t-primary-dark);
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 700;
    text-decoration: none;
    margin-bottom: 12px;
    transition: background .15s;
}
.pd-cat-tag:hover { background: var(--t-primary-light); color: var(--t-primary); filter: brightness(.95); }
.pd-title {
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    font-weight: 800;
    color: var(--t-text-base);
    line-height: 1.4;
    margin-bottom: 20px;
}
.pd-price-box {
    background: var(--t-card-bg);
    border-radius: 14px;
    padding: 16px 20px;
    margin-bottom: 24px;
    border: 1.5px solid var(--t-border);
}
.pd-price-row { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.pd-price-old { font-size: .88rem; color: #9ca3af; text-decoration: line-through; }
.pd-save-badge {
    background: #fef2f2;
    color: #dc2626;
    font-size: .72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 6px;
}
.pd-price-final { font-size: 1.8rem; font-weight: 800; color: var(--t-price); }
.pd-price-unit { font-size: .88rem; font-weight: 400; color: #6b7280; }

/* cart form */
.pd-cart-form { display: flex; gap: 12px; align-items: center; margin-bottom: 24px; flex-wrap: wrap; }
.pd-qty-group {
    display: flex;
    align-items: center;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
}
.pd-qty-btn {
    width: 36px;
    height: 42px;
    border: none;
    background: transparent;
    color: #374151;
    font-size: .8rem;
    cursor: pointer;
    transition: background .15s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pd-qty-btn:hover { background: #f3f4f6; }
.pd-qty-input {
    width: 52px;
    height: 42px;
    border: none;
    border-right: 1.5px solid #e5e7eb;
    border-left: 1.5px solid #e5e7eb;
    text-align: center;
    font-size: .9rem;
    font-weight: 700;
    font-family: inherit;
    color: #111827;
    outline: none;
}
.pd-qty-input::-webkit-inner-spin-button,
.pd-qty-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.pd-add-btn {
    flex: 1;
    min-width: 180px;
    padding: 11px 24px;
    background: var(--t-primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: .92rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}
.pd-add-btn:hover { background: var(--t-primary-dark); transform: translateY(-2px); }
.pd-login-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--t-primary);
    color: #fff;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    margin-bottom: 24px;
    transition: all .2s;
}
.pd-login-btn:hover { background: var(--t-primary-dark); color: #fff; transform: translateY(-2px); }
.pd-add-btn--out {
    background: #94a3b8 !important;
    cursor: not-allowed;
    opacity: .8;
    transform: none !important;
}

/* in-cart state */
.pd-incart-wrap {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
}
.pd-incart-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 10px;
    background: #f0fdf4;
    border: 1.5px solid #bbf7d0;
    color: #15803d;
    font-size: .88rem;
    font-weight: 700;
}
.pd-view-cart-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: 10px;
    background: var(--t-primary, #e53e3e);
    color: #fff;
    font-size: .95rem;
    font-weight: 700;
    text-decoration: none;
    transition: background .2s, transform .2s;
    font-family: inherit;
}
.pd-view-cart-btn:hover {
    background: var(--t-primary-dark, #c53030);
    color: #fff;
    transform: translateY(-2px);
    text-decoration: none;
}

/* stock status */
.pd-stock {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
    width: fit-content;
}
.pd-stock--ok  { background: #dcfce7; color: #166534; }
.pd-stock--low { background: #fef3c7; color: #92400e; }
.pd-stock--out { background: #fee2e2; color: #991b1b; }

/* attributes */
.pd-attrs { margin-bottom: 0; }
.pd-attrs-title {
    font-size: .88rem;
    font-weight: 700;
    color: #374151;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 7px;
}
.pd-attrs-table {
    border-radius: 12px;
    overflow: hidden;
    border: 1.5px solid var(--t-border);
}
.pd-attr-row {
    display: flex;
    font-size: .84rem;
    border-bottom: 1px solid var(--t-border);
}
.pd-attr-row:last-child { border-bottom: none; }
.pd-attr-key {
    background: color-mix(in srgb, var(--t-card-bg) 80%, var(--t-text-base) 5%);
    color: var(--t-text-muted);
    font-weight: 600;
    padding: 10px 14px;
    width: 40%;
    flex-shrink: 0;
    border-left: 1px solid var(--t-border);
}
.pd-attr-val { padding: 10px 14px; color: var(--t-text-base); }

/* sections */
.pd-section { margin-bottom: 40px; }
.pd-section-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--t-text-base);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 9px;
    padding-right: 14px;
    border-right: 4px solid var(--t-primary);
}
.pd-desc {
    background: var(--t-card-bg);
    border-radius: 14px;
    border: 1.5px solid var(--t-border);
    padding: 24px;
    font-size: .9rem;
    line-height: 1.9;
    color: var(--t-text-base);
}

/* thumbnails */
.pd-thumbs {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}
.pd-thumb {
    width: 64px;
    height: 64px;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid #e5e7eb;
    padding: 0;
    background: #f9fafb;
    cursor: pointer;
    transition: border-color .15s;
    flex-shrink: 0;
}
.pd-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; background: #f8fafc; }
.pd-thumb:hover { border-color: var(--t-primary); }
.pd-thumb.active { border-color: var(--t-primary); box-shadow: 0 0 0 2px rgba(var(--t-primary),.25); }

/* similar */
.pd-similar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 16px;
}
@media (max-width: 480px) { .pd-similar-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; } }

/* ═══════════════════════════════════════
   CURRICULUM
═══════════════════════════════════════ */
.pd-cur-wrap {
    margin-bottom: 40px;
    border-radius: 18px;
    border: 1.5px solid color-mix(in srgb, var(--t-primary) 25%, transparent);
    overflow: hidden;
    background: var(--t-card-bg);
    box-shadow: 0 4px 24px color-mix(in srgb, var(--t-primary) 8%, transparent);
}

/* header */
.pd-cur-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-primary-dark) 100%);
    color: #fff;
    gap: 16px;
}
.pd-cur-title {
    font-size: 1.05rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 6px;
}
.pd-cur-title i { font-size: .95rem; opacity: .9; }
.pd-cur-meta {
    display: flex;
    gap: 16px;
    font-size: .78rem;
    opacity: .85;
}
.pd-cur-meta span { display: flex; align-items: center; gap: 5px; }
.pd-cur-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .78rem;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    white-space: nowrap;
    flex-shrink: 0;
}
.pd-cur-badge--ok   { background: rgba(255,255,255,.2); color: #fff; border: 1.5px solid rgba(255,255,255,.45); }
.pd-cur-badge--lock { background: rgba(0,0,0,.18);      color: #fff; border: 1.5px solid rgba(255,255,255,.2); }

/* notice */
.pd-cur-notice {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    background: var(--t-primary-light);
    border-bottom: 1.5px solid color-mix(in srgb, var(--t-primary) 20%, transparent);
    font-size: .85rem;
    color: var(--t-primary-dark);
    line-height: 1.5;
}

/* list */
.pd-cur-list { padding: 8px 0; }

/* each row */
.pd-cur-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--t-border);
    transition: background .12s;
}
.pd-cur-row:last-child { border-bottom: none; }
.pd-cur-row:hover { background: color-mix(in srgb, var(--t-primary) 4%, var(--t-card-bg)); }
.pd-cur-row.is-open { background: color-mix(in srgb, var(--t-primary) 5%, var(--t-card-bg)); }
.pd-cur-row.is-open:hover { background: color-mix(in srgb, var(--t-primary) 9%, var(--t-card-bg)); }
.pd-cur-row.is-locked { opacity: .85; }

/* number badge */
.pd-cur-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--t-border);
    color: var(--t-text-muted);
    font-size: .75rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.pd-cur-row.is-open .pd-cur-num {
    background: var(--t-primary);
    color: #fff;
}

/* type icon */
.pd-cur-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    background: color-mix(in srgb, var(--t-primary) 12%, var(--t-card-bg));
    color: var(--t-primary);
}
.pd-cur-row.is-open .pd-cur-icon {
    background: var(--t-primary);
    color: #fff;
}

/* info */
.pd-cur-info { flex: 1; min-width: 0; }
.pd-cur-item-title {
    font-size: .9rem;
    font-weight: 700;
    color: var(--t-text-base);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pd-cur-item-desc {
    font-size: .75rem;
    color: var(--t-text-muted);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.pd-cur-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
}
.pd-cur-tag {
    font-size: .65rem;
    font-weight: 700;
    background: color-mix(in srgb, var(--t-primary) 15%, var(--t-card-bg));
    color: var(--t-primary-dark);
    border-radius: 4px;
    padding: 1px 7px;
    letter-spacing: .02em;
}
.pd-cur-size { font-size: .72rem; color: var(--t-text-muted); }

/* action */
.pd-cur-action { flex-shrink: 0; }
.pd-cur-dl {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--t-primary);
    color: #fff;
    border-radius: 8px;
    font-size: .78rem;
    font-weight: 700;
    text-decoration: none;
    transition: background .15s, transform .15s;
    white-space: nowrap;
}
.pd-cur-dl:hover { background: var(--t-primary-dark); color: #fff; transform: translateY(-1px); }
.pd-cur-lock-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--t-border);
    color: var(--t-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .82rem;
}

@media (max-width: 600px) {
    .pd-cur-header { flex-direction: column; align-items: flex-start; gap: 10px; }
    .pd-cur-row { padding: 12px 16px; gap: 10px; }
    .pd-cur-dl span { display: none; }
    .pd-cur-dl { padding: 8px 12px; }
}