:root {
    --hc-primary: #2563eb;
    --hc-primary-dark: #1e40af;
    --hc-secondary: #3b82f6;
    --hc-accent: #f97316;
    --hc-bg-light: #f8fafc;
    --hc-card-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(37, 99, 235, 0.1);
    --hc-card-hover-shadow: 0 20px 25px -5px rgba(37, 99, 235, 0.15), 0 10px 10px -5px rgba(37, 99, 235, 0.1);
}

/* HERO SECTIONS */
.hero-section-premium {
    background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.15), transparent), 
                linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 100px 0 80px 0;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero-section-premium h1 {
    font-size: 3.2rem;
    margin-bottom: 20px;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-section-premium p {
    color: #cbd5e1 !important;
    font-size: 1.15rem;
}

.hero-section-premium::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: url('https://www.transparenttextures.com/patterns/carbon-fibre.png');
    opacity: 0.1;
}

.hero-badge-premium {
    display: inline-flex;
    align-items: center;
    background: rgba(37, 99, 235, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 6px 18px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
    letter-spacing: 0.5px;
}

/* OFFER CARDS */
.offer-card-premium {
    background: #fff;
    border-radius: 20px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: var(--hc-card-shadow);
    overflow: hidden;
    margin-bottom: 30px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.offer-card-premium:hover {
    transform: translateY(-5px);
    box-shadow: var(--hc-card-hover-shadow);
    border-color: var(--hc-primary);
}

.offer-card-top {
    display: flex;
    padding: 20px 30px;
    align-items: center;
    gap: 40px;
}

.offer-visual {
    flex: 0 0 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.offer-visual img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.12));
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.offer-card-premium:hover .offer-visual img {
    transform: scale(1.15) rotate(-2deg);
}

.offer-info-main {
    flex: 1;
}

.offer-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.offer-title-row h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1e293b;
    margin: 0;
}

.stock-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.stock-badge.in-stock {
    background: #ecfdf5;
    color: #10b981;
    border: 1px solid #d1fae5;
}

.stock-badge.pending {
    background: #fff7ed;
    color: #f97316;
    border: 1px solid #ffedd5;
}

.stock-badge i {
    font-size: 0.6rem;
}

.location-tag {
    font-size: 0.85rem;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 6px;
}

.spec-grid-premium {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

.spec-item {
    background: #f1f5f9;
    padding: 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.spec-item i {
    font-size: 1.2rem;
    color: var(--hc-primary);
    background: #fff;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.spec-content .label {
    display: block;
    font-size: 0.75rem;
    color: #94a3b8;
    text-transform: uppercase;
    font-weight: 700;
}

.spec-content .value {
    display: block;
    font-weight: 700;
    color: #334155;
    font-size: 0.95rem;
}

.offer-pricing-panel {
    flex: 0 0 240px;
    padding: 20px;
    background: #f8fafc;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    border: 1px solid #e2e8f0;
}

.price-value-container {
    margin-bottom: 20px;
}

.price-large {
    font-size: 2.2rem;
    font-weight: 800;
    color: #1e293b;
}

.price-suffix {
    font-size: 0.9rem;
    color: #64748b;
    font-weight: 500;
}

.btn-buy-premium {
    background: var(--hc-primary);
    color: #fff;
    padding: 12px 24px;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.btn-buy-premium:hover {
    background: var(--hc-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.3);
    color: #fff;
}

/* DETAILS SECTION */
.offer-details-section {
    border-top: 1px solid #f1f5f9;
    padding: 0 30px;
    background: #fcfdfe;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s ease;
}

.offer-details-section.active {
    max-height: 1000px;
    padding: 30px;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.details-col h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.details-col h4 i { color: var(--hc-primary); }

.details-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.details-list li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed #e2e8f0;
    font-size: 0.9rem;
    color: #475569;
}

.details-list li .d-label { font-weight: 600; color: #64748b; }

.btn-details-toggle {
    background: none;
    border: none;
    color: var(--hc-primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 0;
    margin-top: 10px;
}

.btn-details-toggle i {
    transition: transform 0.3s;
}

.btn-details-toggle.active i {
    transform: rotate(180deg);
}

/* INTERFACE SHOWCASE */
.interface-preview {
    position: relative;
    padding: 20px;
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.12);
    transition: transform 0.3s ease;
}

.interface-preview:hover {
    transform: translateY(-10px);
}

.interface-preview img {
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

/* FEATURE CARDS */
.feature-card-premium {
    background: #fff;
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: var(--hc-card-shadow);
    transition: all 0.3s ease;
    height: 100%;
}

.feature-card-premium:hover {
    transform: translateY(-5px);
    box-shadow: var(--hc-card-hover-shadow);
    border-color: var(--hc-primary);
}

/* RESPONSIVE */
@media (max-width: 992px) {
    .spec-grid-premium { grid-template-columns: repeat(1, 1fr); }
    .details-grid { grid-template-columns: 1fr; }
    .offer-card-top { flex-direction: column; }
    .offer-pricing-panel { flex: 1; width: 100%; }
    .offer-visual { display: none; }
    .hero-section-premium h1 { font-size: 2.5rem; }
}