/* === SLM Medspa — Premium Wellness E-Commerce === */

:root {
    --bg: #FAFAFA;
    --text: #1A1A1A;
    --text-light: #6B7280;
    --accent: #10B981;
    --accent-dark: #059669;
    --accent-light: #D1FAE5;
    --white: #FFFFFF;
    --border: #E5E7EB;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

a { color: var(--accent-dark); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

/* --- Affiliate Banner --- */
.affiliate-banner {
    background: var(--accent);
    color: var(--white);
    text-align: center;
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* --- Navbar --- */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo { display: flex; align-items: baseline; gap: 6px; }
.logo-slm { font-size: 1.5rem; font-weight: 700; color: var(--text); letter-spacing: -0.5px; }
.logo-medspa { font-size: 0.75rem; font-weight: 500; color: var(--accent); text-transform: uppercase; letter-spacing: 2px; }

.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { color: var(--text-light); font-size: 0.875rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text);
    padding: 4px;
}

/* --- Flash Messages --- */
.flash-container { padding-top: 16px; }
.flash {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 0.875rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.flash-success { background: var(--accent-light); color: var(--accent-dark); }
.flash-error { background: #FEE2E2; color: #DC2626; }
.flash-close { background: none; border: none; font-size: 1.25rem; cursor: pointer; color: inherit; opacity: 0.7; }

/* --- Hero --- */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.15;
    max-width: 700px;
    margin: 0 auto 16px;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 540px;
    margin: 0 auto 32px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
}
.btn-primary:hover { background: var(--accent-dark); color: var(--white); }

.btn-secondary {
    background: var(--white);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--text-light); }

.btn-outline {
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
}
.btn-outline:hover { background: var(--accent); color: var(--white); }

.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-sm { padding: 8px 16px; font-size: 0.8125rem; }
.btn-block { width: 100%; }

/* --- Category Section --- */
.category-section { padding: 32px 0 48px; }

.category-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.category-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.category-header p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* --- Product Grid --- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* --- Product Card --- */
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow 0.3s, transform 0.2s;
    display: flex;
    flex-direction: column;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.product-card-image {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.product-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-name {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.product-card-compound {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.product-card-desc {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 16px;
    flex: 1;
}

.product-card-pricing {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.price-option {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    font-weight: 500;
}

.price-amount {
    font-size: 1.5rem;
    font-weight: 700;
}

.price-per {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 400;
}

.best-value-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--accent-light);
    color: var(--accent-dark);
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.savings-text {
    font-size: 0.75rem;
    color: var(--accent-dark);
    font-weight: 600;
}

.product-card-actions {
    display: flex;
    gap: 8px;
}

.product-card-actions .btn { flex: 1; }

/* --- Product Detail --- */
.product-detail { padding: 48px 0 80px; }

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.product-detail-image {
    height: 400px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.product-detail-info h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.product-detail-compound {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.product-detail-desc {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}

/* Duration Toggle */
.duration-toggle {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.duration-option {
    flex: 1;
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    position: relative;
}

.duration-option.active {
    border-color: var(--accent);
    background: rgba(16, 185, 129, 0.04);
}

.duration-option .best-value-badge {
    position: absolute;
    top: -10px;
    right: 12px;
}

.duration-option .dur-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-light);
    letter-spacing: 0.5px;
    font-weight: 500;
}

.duration-option .dur-price {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 4px 0;
}

.duration-option .dur-price span {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-light);
}

.duration-option .dur-total {
    font-size: 0.8125rem;
    color: var(--text-light);
}

.duration-option .dur-savings {
    font-size: 0.8125rem;
    color: var(--accent-dark);
    font-weight: 600;
}

/* Detail Sections */
.detail-section {
    margin-bottom: 24px;
}

.detail-section h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.detail-section ul {
    list-style: none;
    padding: 0;
}

.detail-section li {
    padding: 6px 0;
    padding-left: 24px;
    position: relative;
    font-size: 0.875rem;
    color: var(--text-light);
}

.detail-section li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

/* Add-ons */
.addons-section { margin-bottom: 24px; }

.addon-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: border-color 0.2s;
}

.addon-card:has(input:checked) {
    border-color: var(--accent);
    background: rgba(16, 185, 129, 0.04);
}

.addon-card input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
    flex-shrink: 0;
}

.addon-info { flex: 1; }
.addon-name { font-size: 0.875rem; font-weight: 600; }
.addon-desc { font-size: 0.8125rem; color: var(--text-light); }
.addon-price { font-weight: 700; font-size: 0.875rem; white-space: nowrap; }

/* --- Checkout --- */
.checkout-page { padding: 48px 0 80px; }

.checkout-container {
    max-width: 720px;
    margin: 0 auto;
}

.checkout-header {
    text-align: center;
    margin-bottom: 32px;
}

.checkout-header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.checkout-steps {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
}

.checkout-step {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8125rem;
    color: var(--text-light);
    font-weight: 500;
}

.checkout-step.active { color: var(--accent); }
.checkout-step.completed { color: var(--accent-dark); }

.step-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--border);
    color: var(--text-light);
}

.checkout-step.active .step-number { background: var(--accent); color: var(--white); }
.checkout-step.completed .step-number { background: var(--accent-dark); color: var(--white); }

.step-divider {
    width: 32px;
    height: 1px;
    background: var(--border);
}

/* Checkout Panels */
.checkout-panel {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
    margin-bottom: 24px;
}

.checkout-panel h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

/* Order Summary */
.order-summary {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    position: sticky;
    top: 80px;
}

.order-summary h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.summary-line {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    padding: 6px 0;
}

.summary-line.discount { color: var(--accent-dark); }

.summary-total {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    font-size: 1.125rem;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 2px solid var(--text);
}

/* --- Forms --- */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    transition: border-color 0.2s;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-group textarea { resize: vertical; min-height: 80px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 4px;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    cursor: pointer;
}

.checkbox-label input { width: 18px; height: 18px; accent-color: var(--accent); }

/* Medical Disclaimer */
.medical-disclaimer {
    background: #FEF3C7;
    border: 1px solid #FCD34D;
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 24px;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: #92400E;
}

.medical-disclaimer strong { color: #78350F; }

/* --- Thank You --- */
.thank-you-page {
    text-align: center;
    padding: 80px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.thank-you-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2.5rem;
}

.thank-you-page h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.thank-you-page p {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 8px;
}

.thank-you-details {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin: 32px 0;
    text-align: left;
}

.thank-you-details h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

/* --- Affiliate Pages --- */
.auth-page {
    padding: 80px 20px;
    display: flex;
    justify-content: center;
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 40px;
    width: 100%;
    max-width: 480px;
}

.auth-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.auth-card .auth-subtitle {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

/* Affiliate Dashboard */
.dashboard-page { padding: 48px 0 80px; }

.dashboard-header {
    margin-bottom: 32px;
}

.dashboard-header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.dashboard-header p {
    color: var(--text-light);
    font-size: 0.875rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-value.accent { color: var(--accent); }

/* Referral Link Box */
.referral-link-box {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 32px;
}

.referral-link-box h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.referral-link-input {
    display: flex;
    gap: 8px;
}

.referral-link-input input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    background: var(--bg);
    color: var(--text);
}

/* Table */
.data-table-wrap {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.data-table-header {
    padding: 20px 24px 0;
}

.data-table-header h3 {
    font-size: 1rem;
    font-weight: 700;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
    font-weight: 600;
    padding: 16px 24px 8px;
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 14px 24px;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.data-table tr:last-child td { border-bottom: none; }

.status-badge {
    display: inline-flex;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-pending { background: #FEF3C7; color: #92400E; }
.status-completed { background: var(--accent-light); color: var(--accent-dark); }
.status-paid { background: var(--accent-light); color: var(--accent-dark); }

/* --- Admin --- */
.admin-page { padding: 48px 0 80px; }

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.admin-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero { padding: 48px 20px 32px; }

    .product-grid { grid-template-columns: 1fr; }

    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .product-detail-image { height: 240px; }

    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border);
        gap: 16px;
        box-shadow: var(--shadow-md);
    }

    .nav-links.open { display: flex; }
    .mobile-menu-btn { display: block; }

    .form-row { grid-template-columns: 1fr; }

    .checkout-panel { padding: 24px; }

    .duration-toggle { flex-direction: column; }

    .category-header { flex-direction: column; gap: 4px; }

    .stats-grid { grid-template-columns: 1fr 1fr; }

    .data-table { font-size: 0.8125rem; }
    .data-table th, .data-table td { padding: 10px 12px; }

    .auth-card { padding: 24px; }

    .checkout-steps { flex-wrap: wrap; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.75rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .product-card-pricing { flex-direction: column; gap: 8px; }
}

/* --- Utility --- */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

/* Hidden steps */
.step-panel { display: none; }
.step-panel.active { display: block; }