/**
 * Robot-Vacuum.net Stylesheet
 * Fresh nature-inspired color palette
 * Colors: #143D60, #27667B, #A0C878, #DDEB9D
 */

/* ========================================
   CSS Reset & Variables
   ======================================== */
:root {
    /* Brand Colors */
    --color-primary: #143D60;
    --color-secondary: #27667B;
    --color-accent: #A0C878;
    --color-highlight: #DDEB9D;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #143D60 0%, #27667B 50%, #A0C878 100%);
    --gradient-accent: linear-gradient(135deg, #A0C878 0%, #DDEB9D 100%);
    --gradient-hero: linear-gradient(135deg, rgba(20, 61, 96, 0.08) 0%, rgba(39, 102, 123, 0.05) 50%, rgba(160, 200, 120, 0.03) 100%);
    --gradient-card: linear-gradient(180deg, rgba(20, 61, 96, 0.02) 0%, rgba(255, 255, 255, 0) 100%);

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    --color-black: #0a0a0a;

    /* Semantic */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(20, 61, 96, 0.15);
    --shadow-card: 0 4px 20px rgba(20, 61, 96, 0.08);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Header */
    --header-height: 80px;

    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

button {
    cursor: pointer;
    background: none;
    border: none;
}

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

ul, ol {
    list-style: none;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
}

h5 {
    font-size: 1.125rem;
    font-weight: 600;
}

h6 {
    font-size: 1rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-lg { font-size: 1.125rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }
.text-muted { color: var(--color-gray-500); }

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

.section {
    padding: var(--space-16) 0;
}

.section--lg {
    padding: var(--space-24) 0;
}

.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ========================================
   Skip Link (Accessibility)
   ======================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    padding: 8px 16px;
    background: var(--color-primary);
    color: white;
    z-index: 100;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* ========================================
   Header
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(20, 61, 96, 0.08);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.site-header.header-hidden {
    transform: translateY(-100%);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-gray-900);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    display: flex;
}

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

/* Navigation */
.main-nav {
    display: none;
}

@media (min-width: 1024px) {
    .main-nav {
        display: block;
    }
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-weight: 500;
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: rgba(20, 61, 96, 0.05);
}

.dropdown-arrow {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.nav-item:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-badge {
    padding: 2px 8px;
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

/* Dropdown Menus */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 220px;
    padding: var(--space-3);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-list li a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-list li a:hover {
    background: rgba(20, 61, 96, 0.05);
    color: var(--color-primary);
}

.dropdown-divider {
    height: 1px;
    margin: var(--space-2) 0;
    background: var(--color-gray-200);
}

/* Mega Menu */
.mega-menu {
    min-width: 600px;
    padding: var(--space-6);
}

.mega-menu-inner {
    display: grid;
    grid-template-columns: 1fr 1fr 1.5fr;
    gap: var(--space-6);
}

.mega-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-3);
}

.mega-list li a {
    display: block;
    padding: var(--space-2) 0;
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
}

.mega-list li a:hover {
    color: var(--color-primary);
}

.mega-featured {
    padding: var(--space-4);
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
}

.mega-badge {
    display: inline-block;
    padding: 2px 10px;
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
}

.mega-featured-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.mega-featured-card img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: var(--radius-md);
    background: white;
    padding: var(--space-2);
}

.mega-featured-content h5 {
    font-size: 0.9375rem;
    margin-bottom: var(--space-1);
}

.mega-featured-content p {
    font-size: 0.8125rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    gap: 5px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
}

@media (min-width: 1024px) {
    .mobile-menu-toggle {
        display: none;
    }
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: white;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 999;
    overflow-y: auto;
}

.mobile-menu[aria-hidden="false"] {
    transform: translateX(0);
}

body.menu-open {
    overflow: hidden;
}

.mobile-nav-list {
    margin-bottom: var(--space-6);
}

.mobile-nav-list li a {
    display: block;
    padding: var(--space-4) 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-gray-800);
    border-bottom: 1px solid var(--color-gray-200);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9375rem;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    color: white;
    background: var(--gradient-primary);
    box-shadow: 0 4px 15px rgba(20, 61, 96, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(20, 61, 96, 0.4);
}

.btn-accent {
    color: var(--color-primary);
    background: var(--gradient-accent);
    box-shadow: 0 4px 15px rgba(160, 200, 120, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(160, 200, 120, 0.4);
}

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

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

.btn-ghost {
    color: var(--color-gray-700);
    background: transparent;
}

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

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.affiliate-btn .amazon-icon {
    fill: currentColor;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-16);
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 80%, rgba(20, 61, 96, 0.1) 0%, transparent 50%),
                      radial-gradient(circle at 80% 20%, rgba(160, 200, 120, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(20, 61, 96, 0.08);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.hero-title {
    margin-bottom: var(--space-6);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-8);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
}

/* Hero Robot Image */
.hero-image {
    position: absolute;
    right: 5%;
    bottom: 5%;
    width: 400px;
    height: 400px;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

@media (max-width: 1024px) {
    .hero-image {
        display: none;
    }
}

/* ========================================
   Product Cards
   ======================================== */
.product-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.product-rank {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.875rem;
    color: white;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    z-index: 2;
}

.product-badge {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    background: var(--color-accent);
    border-radius: var(--radius-full);
    z-index: 2;
}

.product-card__image {
    display: block;
    padding: var(--space-6);
    background: var(--gradient-card);
}

.product-card__image img {
    width: 100%;
    height: 200px;
    object-fit: contain;
    transition: transform var(--transition-base);
}

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

.product-card__content {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--space-5);
}

.product-card__brand {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.product-card__title {
    font-size: 1.125rem;
    margin-bottom: var(--space-3);
}

.product-card__title a {
    color: var(--color-gray-900);
    transition: color var(--transition-fast);
}

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

.product-card__rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.star-rating {
    display: flex;
    gap: 2px;
}

.star {
    width: 16px;
    height: 16px;
}

.star-full {
    fill: var(--color-highlight);
}

.star-half {
    fill: url(#star-gradient);
}

.star-empty {
    fill: var(--color-gray-300);
}

.rating-score {
    font-weight: 700;
    color: var(--color-gray-900);
}

.product-card__features {
    margin-bottom: var(--space-4);
    flex: 1;
}

.product-card__features li {
    position: relative;
    padding-left: var(--space-5);
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-2);
}

.product-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: 50%;
}

.product-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
}

.product-card__price {
    display: flex;
    flex-direction: column;
}

.price-current {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-900);
}

.price-original {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    text-decoration: line-through;
}

/* ========================================
   Score Bars
   ======================================== */
.score-bar {
    margin-bottom: var(--space-4);
}

.score-bar__header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.score-bar__label {
    font-weight: 500;
    color: var(--color-gray-700);
}

.score-bar__value {
    font-weight: 700;
    color: var(--color-gray-900);
}

.score-bar__track {
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.score-bar__fill {
    height: 100%;
    width: 0;
    border-radius: var(--radius-full);
    transition: width 1s ease-out;
}

.score-bar__fill--excellent {
    background: var(--gradient-primary);
}

.score-bar__fill--good {
    background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
}

.score-bar__fill--average {
    background: var(--color-highlight);
}

.score-bar__fill--poor {
    background: var(--color-gray-400);
}

/* ========================================
   Pros/Cons
   ======================================== */
.pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

@media (max-width: 640px) {
    .pros-cons {
        grid-template-columns: 1fr;
    }
}

.pros-cons__column {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
}

.pros-cons__column--pros {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.pros-cons__column--cons {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.pros-cons__title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.pros-cons__title .icon {
    width: 24px;
    height: 24px;
}

.icon--success {
    color: var(--color-success);
}

.icon--danger {
    color: var(--color-danger);
}

.pros-cons__list li {
    position: relative;
    padding-left: var(--space-5);
    margin-bottom: var(--space-2);
    font-size: 0.9375rem;
}

.pros-cons__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.pros-cons__column--pros .pros-cons__list li::before {
    background: var(--color-success);
}

.pros-cons__column--cons .pros-cons__list li::before {
    background: var(--color-danger);
}

/* ========================================
   Breadcrumbs
   ======================================== */
.breadcrumbs {
    padding: var(--space-4) 0;
}

.breadcrumbs__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
}

.breadcrumbs__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

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

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

.breadcrumbs__separator {
    color: var(--color-gray-400);
}

.breadcrumbs__item [aria-current="page"] {
    color: var(--color-gray-700);
    font-weight: 500;
}

/* ========================================
   Quick Specs
   ======================================== */
.quick-specs {
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin: var(--space-6) 0;
}

.quick-specs__title {
    font-size: 1rem;
    margin-bottom: var(--space-4);
}

.quick-specs__table {
    width: 100%;
}

.quick-specs__table tr {
    border-bottom: 1px solid var(--color-gray-200);
}

.quick-specs__table tr:last-child {
    border-bottom: none;
}

.quick-specs__table th,
.quick-specs__table td {
    padding: var(--space-3) 0;
    font-size: 0.9375rem;
}

.quick-specs__table th {
    font-weight: 500;
    color: var(--color-gray-600);
    text-align: left;
    width: 40%;
}

.quick-specs__table td {
    font-weight: 600;
    color: var(--color-gray-900);
    text-align: right;
}

/* ========================================
   Category Cards
   ======================================== */
.category-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: white;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.category-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.category-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.category-card__icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.category-card__content {
    flex: 1;
}

.category-card__title {
    font-size: 1rem;
    margin-bottom: var(--space-1);
}

.category-card__description {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin: 0;
}

.category-card__count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

.category-card__arrow {
    width: 20px;
    height: 20px;
    color: var(--color-gray-400);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.category-card:hover .category-card__arrow {
    transform: translateX(4px);
    color: var(--color-primary);
}

/* ========================================
   Trust Badges
   ======================================== */
.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-8) 0;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
    margin: var(--space-8) 0;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.trust-badge svg {
    width: 40px;
    height: 40px;
    color: var(--color-primary);
}

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

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

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

/* ========================================
   Newsletter Form
   ======================================== */
.newsletter-form {
    display: flex;
    gap: var(--space-3);
    max-width: 400px;
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-size: 0.9375rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: white;
    transition: border-color var(--transition-fast);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.newsletter-form button {
    white-space: nowrap;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
}

.footer-top {
    padding: var(--space-16) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr) 1.5fr;
    gap: var(--space-8);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: white;
    margin-bottom: var(--space-4);
}

.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
}

.footer-tagline {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-gray-400);
    margin-bottom: var(--space-6);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

.footer-social svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.footer-links h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
}

.footer-links ul li {
    margin-bottom: var(--space-2);
}

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

.footer-links ul li a:hover {
    color: white;
}

.footer-newsletter h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-2);
}

.footer-newsletter p {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    margin-bottom: var(--space-4);
}

.footer-newsletter .newsletter-form {
    flex-direction: column;
}

.footer-newsletter .newsletter-form input {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.footer-newsletter .newsletter-form input::placeholder {
    color: var(--color-gray-500);
}

.footer-disclosure {
    padding: var(--space-6) 0;
    background: rgba(0, 0, 0, 0.3);
}

.footer-disclosure p {
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-gray-500);
    margin: 0;
}

.footer-disclosure a {
    color: var(--color-accent);
    text-decoration: underline;
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

.footer-legal a {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: white;
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   404 Error Page
   ======================================== */
.error-page {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-16) 0;
    background: var(--gradient-hero);
}

.error-content {
    text-align: center;
    max-width: 600px;
}

.error-illustration {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--space-8);
}

.error-robot {
    width: 100%;
    height: 100%;
    animation: float 6s ease-in-out infinite;
}

.error-page h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.error-message {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-8);
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.error-suggestions h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
}

.error-suggestions ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

.error-suggestions li a {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    font-size: 0.9375rem;
    color: var(--color-primary);
    background: rgba(20, 61, 96, 0.08);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.error-suggestions li a:hover {
    color: white;
    background: var(--color-primary);
}

/* ========================================
   Page Headers
   ======================================== */
.page-header {
    padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
    background: var(--gradient-hero);
}

.page-header__content {
    max-width: 800px;
}

.page-header h1 {
    margin-bottom: var(--space-4);
}

.page-header__description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* ========================================
   Content Sections
   ======================================== */
.content-section {
    padding: var(--space-12) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-12);
}

.section-header h2 {
    margin-bottom: var(--space-4);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* ========================================
   Product Grid
   ======================================== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

/* ========================================
   Comparison Table
   ======================================== */
.comparison-table {
    width: 100%;
    overflow-x: auto;
    margin: var(--space-8) 0;
}

.comparison-table table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-4);
    text-align: center;
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
    background: var(--color-gray-50);
    font-weight: 600;
}

.comparison-label {
    text-align: left !important;
    font-weight: 500;
    color: var(--color-gray-700);
}

.comparison-value.highlight {
    background: rgba(20, 61, 96, 0.05);
    font-weight: 600;
    color: var(--color-primary);
}

.check-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-success);
}

.cross-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-danger);
}

/* ========================================
   Article Content
   ======================================== */
.article-content {
    max-width: 800px;
    margin: 0 auto;
}

.article-content h2 {
    margin: var(--space-10) 0 var(--space-5);
}

.article-content h3 {
    margin: var(--space-8) 0 var(--space-4);
}

.article-content p {
    margin-bottom: var(--space-5);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--space-5);
    padding-left: var(--space-6);
}

.article-content li {
    margin-bottom: var(--space-2);
}

.article-content ul li {
    list-style-type: disc;
}

.article-content ol li {
    list-style-type: decimal;
}

.article-content blockquote {
    padding: var(--space-5);
    margin: var(--space-6) 0;
    background: var(--gradient-hero);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    font-style: italic;
}

.article-content img {
    border-radius: var(--radius-lg);
    margin: var(--space-6) 0;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 500;
    color: var(--color-gray-700);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    background: white;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(20, 61, 96, 0.1);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   Utilities
   ======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

/* ========================================
   Reduced Motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .site-header,
    .site-footer,
    .back-to-top,
    .mobile-menu,
    .btn {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: black;
        background: white;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }

    img {
        max-width: 100% !important;
    }
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 0.25rem;
    margin-right: 1rem;
}

.lang-btn {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-600);
    background: var(--color-gray-100);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-900);
}

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

.lang-switcher-mobile {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    border-bottom: 1px solid var(--color-gray-200);
    margin-bottom: 1rem;
}

.lang-switcher-mobile .lang-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .header-actions .lang-switcher {
        display: none;
    }
}