/* ========================================
   Blinds2Size - Main Stylesheet
   Modern, Clean, Professional Design
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0f172a;
    --accent: #f59e0b;
    --accent-dark: #d97706;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --container-max: 1280px;
    --section-padding: 80px;
    --section-padding-mobile: 48px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--gray-800);
    border-color: var(--gray-300);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-white {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
}

.btn-white:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
}

.btn-outline-white {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.logo-accent {
    color: var(--primary);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: var(--radius-full);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cart-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    color: var(--gray-700);
    transition: var(--transition-fast);
}

.cart-btn:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.cart-count {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-count:empty,
.cart-count[data-count="0"] {
    display: none;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    opacity: 0.05;
    transform: skewX(-12deg) translateX(20%);
}

.hero-content {
    position: relative;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: var(--primary);
}

.hero-text {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.hero-feature svg {
    color: var(--primary);
    flex-shrink: 0;
}

/* ========================================
   Trust Bar
   ======================================== */
.trust-bar {
    padding: 32px 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.trust-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    color: var(--primary);
    flex-shrink: 0;
}

.trust-text {
    display: flex;
    flex-direction: column;
}

.trust-text strong {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-900);
}

.trust-text span {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

/* ========================================
   Section Styles
   ======================================== */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 48px;
}

.section-badge {
    display: inline-block;
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-full);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--gray-500);
    margin-bottom: 0;
}

.section-cta {
    text-align: center;
    margin-top: 48px;
}

/* ========================================
   Products Section
   ======================================== */
.products-section {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    position: relative;
    height: 200px;
    background: var(--gray-100);
    overflow: hidden;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-img {
    transform: scale(1.05);
}

.product-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
}

/* Product type specific gradients */
.product-placeholder.venetian-25 { background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%); }
.product-placeholder.venetian-50 { background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%); }
.product-placeholder.roller { background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%); }
.product-placeholder.zebra { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); }
.product-placeholder.honeycomb { background: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%); }
.product-placeholder.vertical { background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%); }
.product-placeholder.wood { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); }
.product-placeholder.plaswood { background: linear-gradient(135deg, #f5f5f4 0%, #e7e5e4 100%); }
.product-placeholder.bamboo { background: linear-gradient(135deg, #ecfccb 0%, #d9f99d 100%); }

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-900);
}

.product-desc {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.product-price {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.product-price strong {
    font-size: 1.125rem;
    color: var(--primary);
}

/* ========================================
   How It Works
   ======================================== */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.step-card {
    position: relative;
    text-align: center;
    padding: 32px 24px;
}

.step-number {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 24px auto 20px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.step-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-text {
    font-size: 0.9375rem;
    color: var(--gray-500);
    margin-bottom: 0;
}

/* ========================================
   Why Choose Us
   ======================================== */
.why-us {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.why-us-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.why-us-content .section-badge {
    margin-bottom: 12px;
}

.why-us-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.why-us-text {
    font-size: 1.0625rem;
    color: var(--gray-600);
    margin-bottom: 28px;
}

.why-us-list {
    margin-bottom: 32px;
}

.why-us-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
}

.why-us-list li:last-child {
    border-bottom: none;
}

.why-us-list svg {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.why-us-list span {
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.why-us-list strong {
    color: var(--gray-900);
}

.why-us-image {
    position: relative;
}

.why-us-img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: var(--radius-xl);
}

.why-us-placeholder {
    width: 100%;
    height: 450px;
    background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
    border-radius: var(--radius-xl);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--white);
    margin-bottom: 16px;
}

.cta-text {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 64px 0 32px;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-desc {
    margin-top: 16px;
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-contact {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-phone,
.footer-email {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9375rem;
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.footer-phone:hover,
.footer-email:hover {
    color: var(--white);
}

.footer-links h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.footer-domain {
    color: var(--primary-light);
}

/* ========================================
   Product Detail Page
   ======================================== */
.page-header {
    padding: 120px 0 48px;
    background: var(--gray-50);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 16px;
}

.breadcrumb a {
    color: var(--gray-500);
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb svg {
    width: 16px;
    height: 16px;
}

.page-title {
    margin-bottom: 8px;
}

.page-subtitle {
    font-size: 1.0625rem;
    color: var(--gray-500);
}

.product-detail {
    padding: var(--section-padding) 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.product-gallery {
    position: sticky;
    top: 96px;
}

.product-main-image {
    width: 100%;
    height: 400px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-thumbnails {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.product-thumb {
    height: 80px;
    background: var(--gray-100);
    border-radius: var(--radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
}

.product-thumb:hover,
.product-thumb.active {
    border-color: var(--primary);
}

/* Calculator Form */
.calculator-section {
    background: var(--white);
}

.calculator-title {
    font-size: 1.25rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-input,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9375rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    transition: var(--transition-fast);
    background: var(--white);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.form-hint {
    font-size: 0.8125rem;
    color: var(--gray-500);
    margin-top: 6px;
}

/* Color Swatches */
.color-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-fast);
    position: relative;
}

.color-swatch:hover {
    transform: scale(1.1);
}

.color-swatch.selected {
    border-color: var(--primary);
}

.color-swatch.selected::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E") center no-repeat;
}

/* Radio Options */
.radio-group {
    display: flex;
    gap: 12px;
}

.radio-option {
    flex: 1;
}

.radio-option input {
    display: none;
}

.radio-option label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition-fast);
}

.radio-option input:checked + label {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
}

/* Price Display */
.price-display {
    background: var(--gray-50);
    padding: 24px;
    border-radius: var(--radius-lg);
    margin: 24px 0;
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.price-row.total {
    padding-top: 16px;
    margin-top: 8px;
    border-top: 1px solid var(--gray-300);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.price-row.total .price-value {
    font-size: 1.5rem;
    color: var(--primary);
}

/* Quantity */
.quantity-input {
    display: flex;
    align-items: center;
    gap: 0;
}

.quantity-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    font-size: 1.25rem;
    color: var(--gray-700);
    transition: var(--transition-fast);
}

.quantity-btn:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
}

.quantity-btn:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
}

.quantity-btn:hover {
    background: var(--gray-200);
}

.quantity-input input {
    width: 60px;
    height: 44px;
    text-align: center;
    border: 1px solid var(--gray-300);
    border-left: none;
    border-right: none;
    font-size: 1rem;
    font-weight: 500;
}

.quantity-input input:focus {
    outline: none;
}

/* Product Info Tabs */
.product-tabs {
    margin-top: 48px;
}

.tabs-nav {
    display: flex;
    border-bottom: 1px solid var(--gray-200);
}

.tab-btn {
    padding: 16px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--gray-500);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    color: var(--gray-700);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    padding: 32px 0;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.specs-table {
    width: 100%;
}

.specs-table tr {
    border-bottom: 1px solid var(--gray-200);
}

.specs-table td {
    padding: 12px 0;
    font-size: 0.9375rem;
}

.specs-table td:first-child {
    font-weight: 500;
    color: var(--gray-700);
    width: 40%;
}

.specs-table td:last-child {
    color: var(--gray-600);
}

/* ========================================
   Products Listing Page
   ======================================== */
.products-listing {
    padding: var(--section-padding) 0;
}

.products-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-200);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 16px;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
}

/* ========================================
   Cart Page
   ======================================== */
.cart-section {
    padding: var(--section-padding) 0;
}

.cart-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 48px;
}

.cart-items {
    background: var(--white);
}

.cart-item {
    display: grid;
    grid-template-columns: 100px 1fr auto auto;
    gap: 24px;
    align-items: center;
    padding: 24px 0;
    border-bottom: 1px solid var(--gray-200);
}

.cart-item-image {
    width: 100px;
    height: 80px;
    background: var(--gray-100);
    border-radius: var(--radius);
}

.cart-item-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.cart-item-details {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.cart-item-price {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.cart-item-remove {
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.cart-item-remove:hover {
    color: var(--red, #ef4444);
}

.cart-empty {
    text-align: center;
    padding: 64px 24px;
}

.cart-empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
}

.cart-empty h3 {
    margin-bottom: 8px;
}

.cart-empty p {
    color: var(--gray-500);
    margin-bottom: 24px;
}

/* Cart Summary */
.cart-summary {
    background: var(--gray-50);
    padding: 32px;
    border-radius: var(--radius-lg);
    position: sticky;
    top: 96px;
}

.cart-summary h3 {
    font-size: 1.125rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    font-size: 0.9375rem;
    color: var(--gray-600);
}

.summary-row.total {
    padding-top: 16px;
    margin-top: 8px;
    border-top: 1px solid var(--gray-300);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.summary-row.total span:last-child {
    font-size: 1.375rem;
    color: var(--primary);
}

.cart-summary .btn {
    margin-top: 24px;
}

.cart-note {
    margin-top: 16px;
    padding: 16px;
    background: var(--white);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    color: var(--gray-600);
}

.cart-note strong {
    color: var(--gray-900);
}

/* ========================================
   Content Pages (About, Contact, etc.)
   ======================================== */
.content-section {
    padding: var(--section-padding) 0;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.content-text h2 {
    margin-bottom: 20px;
}

.content-text p {
    font-size: 1.0625rem;
    color: var(--gray-600);
    margin-bottom: 20px;
}

.content-image {
    height: 400px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
}

/* Contact Form */
.contact-form {
    background: var(--gray-50);
    padding: 40px;
    border-radius: var(--radius-lg);
}

.contact-form h3 {
    margin-bottom: 24px;
}

.contact-info {
    margin-top: 48px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-info-text h4 {
    font-size: 0.9375rem;
    margin-bottom: 4px;
}

.contact-info-text p,
.contact-info-text a {
    font-size: 0.9375rem;
    color: var(--gray-600);
    margin-bottom: 0;
}

.contact-info-text a:hover {
    color: var(--primary);
}

/* How to Measure Page */
.measure-steps {
    counter-reset: step;
}

.measure-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--gray-200);
}

.measure-step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.measure-step-content h3 {
    font-size: 1.125rem;
    margin-bottom: 12px;
}

.measure-step-content p {
    color: var(--gray-600);
    margin-bottom: 0;
}

.measure-tips {
    background: rgba(37, 99, 235, 0.05);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-top: 32px;
}

.measure-tips h4 {
    color: var(--primary);
    margin-bottom: 16px;
}

.measure-tips ul {
    list-style: disc;
    padding-left: 20px;
}

.measure-tips li {
    margin-bottom: 8px;
    color: var(--gray-600);
}

/* FAQ Page */
.faq-item {
    border-bottom: 1px solid var(--gray-200);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-900);
    text-align: left;
}

.faq-question svg {
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding-bottom: 20px;
    color: var(--gray-600);
}

.faq-item.active .faq-answer {
    display: block;
}

/* ========================================
   Alerts & Messages
   ======================================== */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 0.9375rem;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .product-gallery {
        position: static;
    }

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

    .cart-summary {
        position: static;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: var(--section-padding-mobile);
    }

    .header .container {
        height: 64px;
    }

    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 24px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: 0;
    }

    .nav-link {
        display: block;
        padding: 12px 0;
        font-size: 1rem;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .hero {
        padding: 120px 0 60px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .hero-features {
        flex-direction: column;
        gap: 12px;
    }

    .trust-items {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .why-us-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .why-us-image {
        order: -1;
    }

    .why-us-img,
    .why-us-placeholder {
        height: 300px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-buttons .btn {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .cart-item {
        grid-template-columns: 80px 1fr;
        gap: 16px;
    }

    .cart-item-price,
    .cart-item-remove {
        grid-column: 2;
    }

    .tabs-nav {
        overflow-x: auto;
    }

    .tab-btn {
        white-space: nowrap;
        padding: 12px 16px;
    }
}

@media (max-width: 480px) {
    .trust-items {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 24px;
    }

    .radio-group {
        flex-direction: column;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.my-0 { margin-top: 0; margin-bottom: 0; }

.hidden { display: none; }
.visible { display: block; }

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}