:root {
    --primary: #000000;
    --accent: #2563eb;
    --bg: #f8fafc;
    --white: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-premium: 0 20px 25px -5px rgba(0,0,0,0.05), 0 10px 10px -5px rgba(0,0,0,0.04);
}

* {
    box-sizing: border-box;
}

body.page {
    background-color: var(--bg);
    font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;
    color: var(--text-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.checkout-container.checkout-scope {
    max-width: 1200px;
    margin: 40px auto 100px;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 40px;
    align-items: start;
}

@media (max-width: 1024px) {
    .checkout-container.checkout-scope {
        grid-template-columns: 1fr;
        gap: 30px;
        margin-top: 20px;
    }
}

/* Navbar */
.checkout-nav {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand img {
    height: 28px;
    transition: transform 0.2s;
}

.navbar-brand:hover img {
    transform: scale(1.02);
}

/* Sections */
.checkout-section {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-premium);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Autocomplete ultra-cool */
.autocomplete-suggestions { 
    position: absolute; 
    z-index: 1000; 
    background: #ffffff; 
    width: 100%; 
    max-height: 250px; 
    overflow-y: auto; 
    border: 1px solid var(--border); 
    border-radius: 12px; 
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1); 
    margin-top: 5px; 
    display: none;
}
.autocomplete-suggestion { 
    padding: 12px 16px; 
    cursor: pointer; 
    font-size: 14px; 
    border-bottom: 1px solid #f1f5f9; 
    transition: all 0.2s ease;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}
.autocomplete-suggestion:last-child { border-bottom: none; }
.autocomplete-suggestion:hover { background: #f8fafc; color: var(--primary); }
.autocomplete-suggestion strong { font-weight: 700; color: var(--primary); }
/* Custom Checkbox */
.shoppi-checkbox-container {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 35px;
    margin-bottom: 0;
    cursor: pointer;
    font-size: 14px;
    user-select: none;
}
.shoppi-checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}
.shoppi-checkmark {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    height: 22px;
    width: 22px;
    background-color: #f1f5f9;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    transition: all 0.2s ease;
}
.shoppi-checkbox-container:hover input ~ .shoppi-checkmark {
    background-color: #e2e8f0;
}
.shoppi-checkbox-container input:checked ~ .shoppi-checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}
.shoppi-checkmark:after {
    content: "";
    position: absolute;
    display: none;
}
.shoppi-checkbox-container input:checked ~ .shoppi-checkmark:after {
    display: block;
}
.shoppi-checkbox-container .shoppi-checkmark:after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

@media (max-width: 640px) {
    .checkout-section {
        padding: 24px;
    }
}

.section-title {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.step-badge {
    background: var(--primary);
    color: var(--white);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

/* Items Table */
.items-table td {
    padding: 20px 0;
    border-bottom: 1px solid #f1f5f9;
}

.item-image img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    object-fit: cover;
    background: #f1f5f9;
    border: 1px solid var(--border);
    transition: transform 0.2s;
}

.item-image:hover img {
    transform: scale(1.05);
}

.item-details .name {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-main);
    margin-bottom: 4px;
}

.item-details .merchant {
    font-size: 13px;
    color: var(--text-muted);
}

.price-tag {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-main);
}

/* Forms */
.form-row-tight {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 640px) {
    .form-row-tight {
        grid-template-columns: 1fr;
    }
}

.form-col.full {
    grid-column: span 2;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.checkout-scope .form-control {
    width: 100%;
    height: 52px;
    padding: 12px 18px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--text-main);
    transition: all 0.2s;
}

.checkout-scope .form-control:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.05);
    outline: none;
}

/* Sidebar */
.checkout-sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-premium);
}

.btn-checkout-primary {
    width: 100%;
    padding: 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 24px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.btn-checkout-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    background: #1e293b;
}

.sidebar-card hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 24px 0;
}

/* Logistics and Footer Info */
.logistics-footer {
    padding: 24px;
    background: #eff6ff;
    border-radius: var(--radius-md);
    color: #1e40af;
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid #dbeafe;
}

.info-checkout {
    background: #fff !important;
    border-top: 1px solid var(--border) !important;
}

/* Animations */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.checkout-section, .sidebar-card {
    animation: slideUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}