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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.6;
    color: #0F172A;
    background-color: #ffffff;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --color-primary: #0F172A;
    --color-primary-light: #1E293B;
    --color-primary-dark: #020617;
    
    --color-accent-green: #10B981;
    --color-accent-green-light: #34D399;
    --color-accent-green-dark: #059669;
    
    --color-accent-orange: #F59E0B;
    --color-accent-orange-light: #FBBF24;
    --color-accent-orange-dark: #D97706;
    
    --color-accent-blue: #0EA5E9;
    --color-accent-blue-light: #38BDF8;
    --color-accent-blue-dark: #0284C7;
    
    --color-gray-50: #F8FAFC;
    --color-gray-100: #F1F5F9;
    --color-gray-200: #E2E8F0;
    --color-gray-300: #CBD5E1;
    --color-gray-400: #94A3B8;
    --color-gray-500: #64748B;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1E293B;
    --color-gray-900: #0F172A;
    
    --color-white: #FFFFFF;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Lora', serif;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    --spacing-5xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 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 -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Layout */
    --header-height: 4rem;
    --container-max-width: 1200px;
    --container-padding: 1rem;
    
    /* Z-index */
    --z-header: 100;
    --z-dropdown: 200;
    --z-modal: 300;
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-accent-green-dark), var(--color-accent-green));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn--secondary:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-400);
    transform: translateY(-2px);
}

.btn--full-width {
    width: 100%;
    justify-content: center;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: var(--z-header);
    transition: var(--transition-base);
}

.header.scroll {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.nav__logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-md);
}

.nav__logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__link {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    padding: var(--spacing-sm) var(--spacing-md);
    position: relative;
    transition: var(--transition-base);
    border-radius: var(--radius-md);
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-accent-green);
    background-color: rgba(16, 185, 129, 0.1);
}

.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background-color: var(--color-accent-green);
    border-radius: var(--radius-sm);
}

.nav__toggle,
.nav__close {
    display: none;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* ===== HERO SECTION ===== */
.hero {
    padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-5xl);
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
    position: relative;
    overflow: hidden;
    min-height: 80vh;
}

.hero__container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero__content {
    z-index: 2;
}

.hero__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero__subtitle {
    font-size: var(--font-size-2xl);
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-lg);
    font-weight: var(--font-weight-semibold);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.hero__search {
    margin-bottom: var(--spacing-2xl);
}

.search__container {
    position: relative;
    max-width: 500px;
}

.search__input {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    padding-right: 70px;
    font-size: var(--font-size-lg);
    background-color: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

.search__input:focus {
    border-color: var(--color-accent-green);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.search__button {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    color: var(--color-white);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.search__button:hover {
    background: linear-gradient(135deg, var(--color-accent-green-dark), var(--color-accent-green));
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-green);
    margin-bottom: var(--spacing-xs);
}

.hero__stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    font-weight: var(--font-weight-medium);
}

.hero__img {
    position: relative;
    z-index: 1;
}

.hero__bg {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(16, 185, 129, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: var(--radius-2xl);
    pointer-events: none;
}

/* ===== CATEGORIES SECTION ===== */
.categories {
    padding: var(--spacing-5xl) 0;
    background-color: var(--color-white);
}

.categories__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.category__card {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--color-gray-100);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.category__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent-green), var(--color-accent-blue));
    opacity: 0;
    transition: var(--transition-base);
}

.category__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent-green);
}

.category__card:hover::before {
    opacity: 1;
}

.category__icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
    color: var(--color-white);
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.category__card:hover .category__icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--color-accent-green-dark), var(--color-accent-green));
}

.category__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.category__description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.category__stats {
    background-color: var(--color-gray-50);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-green);
}

.category__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-green);
    transition: var(--transition-base);
}

.category__link:hover {
    color: var(--color-accent-green-dark);
    transform: translateX(4px);
}

/* ===== ARTICLES SECTION ===== */
.articles {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.articles__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.article__card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--color-gray-100);
    display: flex;
    flex-direction: column;
}

.article__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent-green);
}

.article__img {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.article__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.article__card:hover .article__img img {
    transform: scale(1.05);
}

.article__content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article__meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.article__category {
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    box-shadow: var(--shadow-sm);
}

.article__date {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.article__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.article__excerpt {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    flex-grow: 1;
}

.article__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-100);
}

.article__author {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    font-style: italic;
}

.article__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-green);
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.article__link:hover {
    color: var(--color-accent-green-dark);
    transform: translateX(4px);
}

.articles__footer {
    text-align: center;
}

/* ===== NEWSLETTER SECTION ===== */
.newsletter {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-blue));
    color: var(--color-white);
}

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

.newsletter__icon {
    width: 80px;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
}

.newsletter__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.newsletter__description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.newsletter__form {
    display: flex;
    gap: var(--spacing-md);
    max-width: 400px;
    margin: 0 auto;
}

.newsletter__input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-white);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    color: var(--color-primary);
}

.newsletter__input:focus {
    border-color: var(--color-accent-orange);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.newsletter__button {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--color-accent-orange);
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-base);
    white-space: nowrap;
    box-shadow: var(--shadow-md);
}

.newsletter__button:hover {
    background-color: var(--color-accent-orange-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== PAGE HEADER ===== */
.page-header {
    padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.breadcrumb__link {
    color: var(--color-gray-300);
    transition: var(--transition-base);
}

.breadcrumb__link:hover {
    color: var(--color-white);
}

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

.breadcrumb__current {
    color: var(--color-white);
    font-weight: var(--font-weight-medium);
}

.page-header__title {
    font-family: var(--font-secondary);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.page-header__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    line-height: 1.6;
}

/* ===== CATEGORY FILTER ===== */
.category-filter {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: var(--header-height);
    z-index: 90;
}

.filter__tabs {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.filter__tab {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
    border-radius: var(--radius-lg);
    white-space: nowrap;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.filter__tab:hover,
.filter__tab.active {
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter__search {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.filter__search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    padding-right: 50px;
    background-color: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.filter__search-input:focus {
    border-color: var(--color-accent-green);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.filter__search-icon {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
}

/* ===== ARTICLES LIST ===== */
.articles-list {
    padding: var(--spacing-3xl) 0 var(--spacing-5xl);
    background-color: var(--color-white);
    min-height: 60vh;
}

.articles-list__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.articles-list__pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

.pagination__btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-white);
    color: var(--color-gray-600);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.pagination__btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    color: var(--color-white);
    border-color: var(--color-accent-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination__btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination__numbers {
    display: flex;
    gap: var(--spacing-sm);
}

.pagination__number {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-base);
    background-color: var(--color-white);
    color: var(--color-gray-600);
    border: 2px solid var(--color-gray-300);
    box-shadow: var(--shadow-sm);
}

.pagination__number:hover,
.pagination__number.active {
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    color: var(--color-white);
    border-color: var(--color-accent-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer__logo-img {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-md);
}

.footer__logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.footer__description {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-base);
    padding: var(--spacing-xs) 0;
}

.footer__link:hover {
    color: var(--color-accent-green-light);
    transform: translateX(4px);
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer__social-link {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    transition: var(--transition-base);
    backdrop-filter: blur(10px);
}

.footer__social-link:hover {
    background: linear-gradient(135deg, var(--color-accent-green), var(--color-accent-green-light));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer__copy {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .hero__stats {
        justify-content: center;
    }
    
    .categories__grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .articles__grid,
    .articles-list__grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media screen and (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --header-height: 3.5rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-50) 100%);
        flex-direction: column;
        justify-content: center;
        transition: var(--transition-base);
        z-index: calc(var(--z-header) + 1);
        backdrop-filter: blur(20px);
    }
    
    .nav__menu.show {
        left: 0;
    }
    
    .nav__list {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .nav__link {
        font-size: var(--font-size-lg);
        text-align: center;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav__toggle,
    .nav__close {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: var(--radius-md);
        background-color: rgba(15, 23, 42, 0.1);
        transition: var(--transition-base);
    }
    
    .nav__toggle:hover,
    .nav__close:hover {
        background-color: var(--color-accent-green);
        color: var(--color-white);
    }
    
    .nav__close {
        position: absolute;
        top: var(--spacing-xl);
        right: var(--spacing-xl);
    }
    
    .hero {
        padding: calc(var(--header-height) + var(--spacing-xl)) 0 var(--spacing-3xl);
        text-align: center;
        min-height: auto;
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-xl);
    }
    
    .hero__stats {
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }
    
    .section__title {
        font-size: var(--font-size-2xl);
    }
    
    .page-header__title {
        font-size: var(--font-size-3xl);
    }
    
    .categories__grid,
    .articles__grid,
    .articles-list__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .newsletter__form {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .footer__social {
        justify-content: center;
    }

    .filter__tabs {
        justify-content: flex-start;
        gap: var(--spacing-md);
    }
}

@media screen and (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .section__title {
        font-size: var(--font-size-xl);
    }
    
    .search__input,
    .newsletter__input {
        font-size: var(--font-size-base);
        padding: var(--spacing-md);
    }
    
    .search__button {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    .category__card,
    .article__card {
        margin: 0;
    }
    
    .article__content {
        padding: var(--spacing-lg);
    }
    
    .hero__stats {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.6s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* ===== LOADING STATES ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl);
    color: var(--color-gray-500);
}

.loading::after {
    content: '';
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-300);
    border-top: 3px solid var(--color-accent-green);
    border-radius: 50%;
    margin-left: var(--spacing-sm);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== ACCESSIBILITY ===== */
.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;
}

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

/* ===== FOCUS STYLES ===== */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--color-accent-green);
    outline-offset: 2px;
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    :root {
        --color-gray-400: #666666;
        --color-gray-500: #555555;
        --color-gray-600: #444444;
    }
    
    .btn--secondary {
        border-width: 2px;
    }
    
    .article__card,
    .category__card {
        border-width: 2px;
    }
}

/* ===== NOTIFICATION STYLES ===== */
.notification {
    position: fixed;
    top: calc(var(--header-height) + 1rem);
    right: 1rem;
    background: var(--color-white);
    color: var(--color-primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--color-accent-green);
    z-index: 1000;
    max-width: 350px;
    animation: slideInRight 0.3s ease-out;
}

.notification--error {
    border-left-color: var(--color-error);
}

.notification--success {
    border-left-color: var(--color-success);
}

.notification--warning {
    border-left-color: var(--color-warning);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}