/**
 * subjectDetails.aspx — Premium visual layer
 * Scoped strictly to: .page-subject
 */

.page-subject {
    --sd-accent: #dc3545;
    --sd-accent-2: #ff6b6b;
    --sd-accent-rgb: 220, 53, 69;
    --sd-blue: #0168b2;
    --sd-blue-soft: #e8f3fb;
    --sd-deep: #1a252f;
    --sd-slate: #2c3e50;
    --sd-slate-mid: #34495e;
    --sd-ink: #1a1d24;
    --sd-muted: #5c6570;
    --sd-soft: #f6f8fc;
    --sd-line: rgba(26, 29, 36, 0.08);
    --sd-success: #28a745;
    --sd-success-dark: #1f8a3a;
    --sd-radius-lg: 20px;
    --sd-radius-md: 14px;
    --sd-radius-sm: 10px;
    --sd-elev-1: 0 12px 28px rgba(15, 18, 28, 0.08);
    --sd-elev-2: 0 22px 56px rgba(15, 18, 28, 0.16);
}

/* ========== HERO (داخل Repeater) ========== */
.page-subject .sd-main {
    background: linear-gradient(180deg, #f6f8fc 0%, #ffffff 100%);
    padding: 1.25rem 0 3rem;
}

.page-subject .sd-main > .container {
    max-width: 1280px;
}

/* breadcrumb */
.page-subject .sd-crumbs {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0;
    margin: 0 0 1rem;
    list-style: none;
    font-size: 0.82rem;
    color: var(--sd-muted);
}

.page-subject .sd-crumbs li { display: inline-flex; align-items: center; gap: 0.4rem; }

.page-subject .sd-crumbs li + li::before {
    content: "\f054";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.55rem;
    color: #c0c5cd;
    margin-right: 0.25rem;
}

.page-subject .sd-crumbs a {
    color: var(--sd-muted) !important;
    text-decoration: none !important;
    border-bottom: 1px dotted transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.page-subject .sd-crumbs a:hover {
    color: var(--sd-accent) !important;
    border-bottom-color: rgba(var(--sd-accent-rgb), 0.45);
}

.page-subject .sd-crumbs li.active {
    color: var(--sd-ink);
    font-weight: 700;
}

/* عنوان المادة */
.page-subject .sd-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--sd-ink);
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
    line-height: 1.2;
}

.page-subject .sd-meta-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 1.1rem;
}

.page-subject .sd-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.32rem 0.75rem;
    background: var(--sd-soft);
    border: 1px solid var(--sd-line);
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--sd-ink);
}

.page-subject .sd-pill i { color: var(--sd-accent); }

/* ========== LEFT — Image + Prices ========== */
.page-subject .sd-image-card {
    position: relative;
    border-radius: var(--sd-radius-lg);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--sd-line);
    box-shadow: var(--sd-elev-1);
    padding: 1.25rem;
    text-align: center;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-subject .sd-image-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(var(--sd-accent-rgb), 0.85), #ffffffaa, rgba(var(--sd-accent-rgb), 0.85), transparent);
}

.page-subject .sd-image-card img {
    max-width: 100%;
    max-height: 460px;
    width: auto !important;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.4s ease;
}

.page-subject .sd-image-card:hover img {
    transform: scale(1.02);
}

/* Price card */
.page-subject .sd-price-card {
    margin-top: 1rem;
    background: linear-gradient(135deg, #fff 0%, #fafbfd 100%);
    border: 1px solid var(--sd-line);
    border-radius: var(--sd-radius-md);
    box-shadow: var(--sd-elev-1);
    padding: 1.1rem 1.25rem;
    overflow: hidden;
}

.page-subject .sd-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.55rem 0;
    border-bottom: 1px dashed var(--sd-line);
    flex-wrap: wrap;
}

.page-subject .sd-price-row:last-child { border-bottom: none; }

.page-subject .sd-price-label {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--sd-blue);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.page-subject .sd-price-row--old .sd-price-label::before {
    content: "\f02b";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--sd-muted);
    font-size: 0.85rem;
}

.page-subject .sd-price-row--new .sd-price-label::before {
    content: "\f005";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--sd-accent);
    font-size: 0.85rem;
}

.page-subject .sd-price-value {
    display: inline-flex;
    align-items: baseline;
    gap: 0.35rem;
    font-weight: 700;
    color: var(--sd-ink);
}

.page-subject .sd-price-row--old .sd-price-value {
    color: var(--sd-muted);
}

.page-subject .sd-price-row--old .sd-price-value :first-child {
    text-decoration: line-through;
}

.page-subject .sd-price-row--new .sd-price-value :first-child {
    color: var(--sd-accent);
    font-size: 1.5rem !important;
    font-weight: 800;
    line-height: 1;
}

.page-subject .sd-price-unit {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--sd-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ========== RIGHT — Configuration card ========== */
.page-subject .sd-config-card {
    background: #fff;
    border: 1px solid var(--sd-line);
    border-radius: var(--sd-radius-lg);
    box-shadow: var(--sd-elev-1);
    padding: 1.5rem;
    position: sticky;
    top: 90px;
}

.page-subject .sd-config-card > * + * {
    margin-top: 1.1rem;
}

.page-subject .sd-section-title {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--sd-ink);
    margin: 0 0 0.85rem !important;
    letter-spacing: -0.01em;
}

.page-subject .sd-section-title::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 18px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--sd-accent), var(--sd-accent-2));
    box-shadow: 0 0 10px rgba(var(--sd-accent-rgb), 0.45);
    margin-right: 0.1rem;
}

.page-subject .sd-section-title i {
    color: var(--sd-accent);
    font-size: 0.95rem;
}

.page-subject .sd-section-title--sm {
    font-size: 0.85rem;
}

/* form grid + selects */
.page-subject .sd-form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.85rem;
}

.page-subject .sd-form-grid .form-group {
    margin-bottom: 0;
}

@media (max-width: 767.98px) {
    .page-subject .sd-form-grid { grid-template-columns: 1fr; }
}

.page-subject .sd-field-label {
    display: flex !important;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.74rem !important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--sd-muted);
    margin-bottom: 0.35rem;
}

.page-subject .sd-field-label::before {
    content: "";
    width: 4px;
    height: 12px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--sd-accent), var(--sd-accent-2));
}

.page-subject .sd-config-card .form-control,
.page-subject .sd-config-card select.form-control,
.page-subject .sd-config-card select.select {
    width: 100% !important;
    height: 44px;
    border-radius: 10px !important;
    border: 1px solid var(--sd-line) !important;
    background: #fff !important;
    color: var(--sd-ink) !important;
    padding: 0.45rem 0.85rem !important;
    font-weight: 600;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.page-subject .sd-config-card .form-control:focus,
.page-subject .sd-config-card select.select:focus {
    border-color: rgba(var(--sd-accent-rgb), 0.7) !important;
    background: #fff !important;
    box-shadow: 0 0 0 4px rgba(var(--sd-accent-rgb), 0.15) !important;
    outline: none !important;
}

.page-subject .sd-config-card textarea.form-control {
    height: auto;
    min-height: 110px;
    resize: vertical;
}

/* Custom order */
.page-subject .sd-custom-order {
    background: #fff8e1;
    border: 1px solid #f4d999;
    border-radius: var(--sd-radius-md);
    padding: 0.9rem 1rem 1rem;
}

.page-subject .sd-custom-order .sd-field-label {
    color: #855d00;
}

.page-subject .sd-custom-order .sd-field-label::before {
    background: linear-gradient(180deg, #ffb74d, #ff8c00);
}

/* ========== Binding options ========== */
.page-subject .sd-binding-card {
    background: linear-gradient(180deg, #fafbfd 0%, #fff 100%);
    border: 1px solid var(--sd-line);
    border-radius: var(--sd-radius-md);
    padding: 1rem 1.1rem 1.1rem;
    direction: ltr;
}

.page-subject .sd-binding-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.6rem;
    margin-bottom: 0.9rem;
}

@media (max-width: 575.98px) {
    .page-subject .sd-binding-grid { grid-template-columns: 1fr; }
}

.page-subject .sd-binding-option {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.45rem;
    padding: 0.7rem 0.5rem 0.65rem;
    background: #fff;
    border: 2px solid var(--sd-line);
    border-radius: var(--sd-radius-sm);
    cursor: pointer;
    transition: border-color 0.18s ease, box-shadow 0.2s ease, transform 0.15s ease;
    margin: 0 !important;
    text-align: center;
}

.page-subject .sd-binding-option:hover {
    border-color: rgba(var(--sd-accent-rgb), 0.4);
    transform: translateY(-2px);
}

.page-subject .sd-binding-option:has(input[type="radio"]:checked) {
    border-color: var(--sd-accent);
    box-shadow:
        0 0 0 1px rgba(var(--sd-accent-rgb), 0.3),
        0 10px 24px rgba(var(--sd-accent-rgb), 0.18);
    background: linear-gradient(180deg, #fff8f9 0%, #fff 100%);
}

.page-subject .sd-binding-option .sd-radio-wrap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.page-subject .sd-binding-option .sd-radio-wrap input[type="radio"] {
    width: 18px !important;
    height: 18px !important;
    accent-color: var(--sd-accent);
    cursor: pointer;
}

.page-subject .sd-binding-option .sd-radio-wrap label,
.page-subject .sd-binding-option .sd-radio-wrap span { display: none !important; }

.page-subject .sd-binding-option img {
    width: 56px !important;
    height: 56px !important;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid var(--sd-line);
    background: #fff;
    padding: 4px;
    box-shadow: none !important;
}

.page-subject .sd-binding-option .sd-binding-name {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--sd-ink);
    line-height: 1.2;
}

/* selected binding preview block */
.page-subject .sd-binding-preview {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 0.85rem 1rem;
    background: #fff;
    border: 1px solid var(--sd-line);
    border-radius: var(--sd-radius-sm);
}

.page-subject .sd-binding-preview img {
    flex: 0 0 80px;
    width: 80px !important;
    height: 80px !important;
    object-fit: contain;
    border-radius: 8px;
    border: 1px solid var(--sd-line);
    background: #fafbfd;
    box-shadow: none !important;
}

.page-subject .sd-binding-fee {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.page-subject .sd-fee-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--sd-muted);
}

.page-subject .sd-fee-value {
    font-size: 1rem;
    font-weight: 800;
    color: var(--sd-accent);
}

/* ========== Add to Cart button ========== */
.page-subject .sd-add-to-cart {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    width: 100%;
    padding: 0.95rem 1.4rem !important;
    background: linear-gradient(135deg, var(--sd-success-dark) 0%, var(--sd-success) 100%) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 999px !important;
    font-size: 1.05rem !important;
    font-weight: 800 !important;
    letter-spacing: 0.02em;
    box-shadow:
        0 14px 32px rgba(40, 167, 69, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
    transition: transform 0.18s ease, box-shadow 0.22s ease, filter 0.2s ease;
    text-decoration: none !important;
    position: relative;
    overflow: hidden;
}

.page-subject .sd-add-to-cart::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.25) 50%, transparent 70%);
    transform: translateX(-110%);
    pointer-events: none;
}

.page-subject .sd-add-to-cart:hover::before {
    animation: sd-shine 0.9s ease-out;
}

.page-subject .sd-add-to-cart:hover {
    transform: translateY(-2px);
    filter: brightness(1.04);
    box-shadow:
        0 20px 42px rgba(40, 167, 69, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.25);
    color: #fff !important;
}

.page-subject .sd-add-to-cart:active {
    transform: translateY(0);
}

.page-subject .sd-add-to-cart i {
    font-size: 1.15rem;
}

@keyframes sd-shine {
    0%   { transform: translateX(-110%); }
    100% { transform: translateX(110%); }
}

/* ========== Responsive ========== */
@media (max-width: 991.98px) {
    .page-subject .sd-config-card {
        position: relative;
        top: 0;
        margin-top: 1.5rem;
    }
}

@media (max-width: 575.98px) {
    .page-subject .sd-config-card { padding: 1.1rem; }
    .page-subject .sd-image-card { padding: 1rem; min-height: 220px; }
    .page-subject .sd-image-card img { max-height: 320px; }
}

@media (prefers-reduced-motion: reduce) {
    .page-subject .sd-image-card img,
    .page-subject .sd-binding-option,
    .page-subject .sd-add-to-cart,
    .page-subject .sd-add-to-cart::before {
        transition: none !important;
        animation: none !important;
    }
}