:root {
    /* Colors */
    --primary-color: #249ea0;
    --primary-hover: #f78104;
    --text-dark: #252F4A;
    --text-light: #666666;
    --text-muted: #999999;
    --accent-red: #E74C3C;
    --accent-orange: #FF6B35;
    --bg-light: #F5F5F5;
    --bg-white: #FFFFFF;
    --border-color: #E0E0E0;
    --shadow-light: rgba(0, 0, 0, 0.08);
    --shadow-medium: rgba(0, 0, 0, 0.12);

    /* Fonts */
    --font-family-primary: 'Inter', system-ui, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 28px;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;

    /* Container size */
    --container-max-width: 1366px;
}

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

/* Custom scrollbar Track */
::-webkit-scrollbar {
  width: 0.5rem;
}

::-webkit-scrollbar-track {
  border-radius: 9999px;
  background-color: #F1F1F4;
}

::-webkit-scrollbar-thumb {
  border-radius: 9999px;
  background-color: #C4CADA;
}

::-webkit-scrollbar-thumb:hover {
  background-color: #99A1B7;
}

body {
    font-family: var(--font-family-primary);
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
}

/* Header & Navigation */
.category-box {
    padding-top: var(--spacing-xl);
}

.btn {
    background-color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    text-decoration: none;
    transition: 300ms ease;
    height: 40px;
    font-size: 16px;
    &.btn-primary {
        color: #fff;
        &:visited {
            color: #fff;
        }
        &:hover {
            background-color: var(--primary-hover);
        }
    }
}
a.btn-primary {
    font-weight: 500;
    border: 1px solid transparent;
}
.back-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    height: 32px;
    padding-inline: 10px 16px;

    svg {
        width: 20px;
    }
}

.category-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.search-box {
    flex: 1;
    max-width: 300px;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family-primary);
    transition: border-color var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.nav-tabs {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex: 1;
    overflow-x: auto;
}

.nav-tabs button {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: none;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-light);
    transition: all var(--transition-fast);
    white-space: nowrap;
    border-radius: var(--radius-md);
}

.nav-tabs button.active {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.nav-tabs button:hover:not(.active) {
    color: var(--primary-hover);
    background-color: var(--bg-white);
}

.category-dropdown {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-dropdown:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-md);
    }
}

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

/* Blog Card */
.blog-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-light);
    transition: all var(--transition-normal);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow-medium);
}

.blog-card.featured {
    grid-column: span 1;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.2)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?w=600&h=400&fit=crop');
    background-size: cover;
    background-position: center;
    color: var(--bg-white);
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-lg);
}

.blog-card.featured .card-content {
    background: none;
    padding: 0;
}

.blog-card.featured .card-title {
    color: var(--bg-white);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.blog-card.featured .card-meta {
    color: rgba(255, 255, 255, 0.9);
}

/* .card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--bg-light);
} */

.card-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    background-color: var(--bg-light);
    aspect-ratio: 3/2;
}

.card-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-date {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
    flex: 1;
}

.card-title:hover {
    color: var(--primary-color);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.card-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
}

/* Load More Button */
.load-more-container {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

.btn-load-more {
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--primary-color);
    color: var(--bg-white);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 82, 204, 0.3);
    text-decoration: none;
}

.btn-load-more:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 82, 204, 0.4);
}

.btn-load-more:active {
    transform: translateY(0);
}

/* Blog Detail Page */
main {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

.blog-detail-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
}

.blog-detail-content {
    background-color: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.blog-detail-header {
    margin-bottom: var(--spacing-md);
}

.blog-detail-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.blog-detail-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.blog-detail-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.blog-detail-body {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-dark);
}

.blog-detail-body h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    scroll-margin-top: 70px;
}

.blog-detail-body p:not(:last-child) {
    margin-bottom: var(--spacing-lg);
}

.blog-detail-body ul,
.blog-detail-body ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.blog-detail-body li {
    margin-bottom: var(--spacing-sm);
}

/* Table of Contents */
.toc-sidebar {
    position: sticky;
    top: 16px;
    height: fit-content;
}

.toc-box {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.toc-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.toc-list {
    list-style: none;
}

.toc-list li {
    margin-bottom: var(--spacing-sm);
}

.toc-list a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-light);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.toc-list a:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.toc-list a.active {
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    background-color: rgba(0, 82, 204, 0.05);
    font-weight: var(--font-weight-semibold);
}

/* Responsive */
@media (max-width: 1024px) {
    .blog-detail-container {
        grid-template-columns: 1fr;
    }

    .toc-sidebar {
        position: static;
        display: none;
    }

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

@media (max-width: 768px) {
    .category-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .search-box {
        max-width: 100%;
    }

    .nav-tabs {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .category-dropdown {
        width: 100%;
        justify-content: space-between;
    }

    .blog-detail-content {
        padding: var(--spacing-lg);
    }

    .blog-detail-title {
        font-size: var(--font-size-2xl);
    }

    .blog-detail-image {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .category-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-tabs {
        gap: var(--spacing-sm);
    }

    .nav-tabs button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }

    .blog-detail-content {
        padding: var(--spacing-md);
    }

    .blog-detail-title {
        font-size: var(--font-size-xl);
    }

    .blog-detail-body h2 {
        font-size: var(--font-size-xl);
    }

    .btn-load-more {
        width: 100%;
    }
}

/* Scrollbar Styling */
.nav-tabs::-webkit-scrollbar {
    height: 4px;
}

.nav-tabs::-webkit-scrollbar-track {
    background: var(--bg-light);
}

.nav-tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.nav-tabs::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}
/* Blog Banner */
.blog-banner {
    background: linear-gradient(135deg, #249ea02b 0%, #f7810412 100%);
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.blog-banner-content {
    max-width: 900px;
    margin: 0 auto;
}

.blog-banner-category {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-medium);
}

.blog-banner-title {
    font-size: 42px;
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.blog-banner-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--text-light);
    align-items: center;
}

.blog-banner-read-time,
.blog-banner-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.blog-banner-date a {
    text-decoration: none;
    color: var(--text-light);
}
@media (max-width: 768px) {
    .blog-banner {
        padding: 40px 20px;
    }

    .blog-banner-title {
        font-size: 28px;
    }

    .blog-banner-meta {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .blog-banner {
        padding: 30px 15px;
    }

    .blog-banner-title {
        font-size: 22px;
    }

    .blog-banner-meta {
        font-size: var(--font-size-sm);
    }
}


/* ============================================
   HEADER STYLES
   ============================================ */

.header {
    position: sticky;
    top: 0;
    background-color: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 50;
}

.header-container {
    max-width: 96rem ;
    margin: 0 auto;
    padding: 14px 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo img {
    max-width: 175px;
    height: auto;
}

.nav {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    justify-content: space-between;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
    margin-inline:auto;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 18px;
    transition: color var(--transition-fast);
}

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

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

.nav-login {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 18px;
    transition: color var(--transition-fast);
}

.nav-login:hover {
    color: var(--primary-color);
}

.menu-toggle {
    display: none;
    background-color: rgba(0, 0, 0, 0.1);
    border: none;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
}

.menu-toggle svg {
    width: 16px;
    height: 16px;
}

.menu-close {
    display: none;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    position: relative;
}

.menu-close svg {
    width: 26px;
    height: 26px;
}

.menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 10;
    backdrop-filter: blur(8px);
    transition-duration:200ms ;
}

/* Mobile Menu */
@media (max-width: 768px) {
    .header-container {
        padding: 14px 16px;
    }

    .logo img {
        max-width: 144px;
    }

    .nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 0;
        height: 100vh;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: 0;
        overflow: hidden;
        transition: width 0.2s ease;
        z-index: 20;
        margin-left: 0;
        gap: 0;
    }

    .nav.active {
        width: min(300px, 80vw);
    }

    .nav-header {
        display: flex;
        justify-content: flex-end;
        margin-inline-end: auto;
    }

    .menu-close {
        display: block;
        padding: 16px 0 0 12px;
        svg path {
            fill: var(--bg-white);
        }
    }

    .menu-toggle {
        display: block;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        padding: 16px 32px 0px 32px;
    }

    .nav-menu a {
        display: block;
        font-size: 24px;
        color: #ffffff;
        line-height: 1.35;
    }

    .nav-actions {
        width: 100%;
        margin-left: 0;
        margin-top: auto;
        gap: 16px;
        padding: 20px 32px;
        justify-content: center;
        .btn.btn-primary {
            background-color: var(--bg-white);
            color: var(--primary-color);
        }
    }

    .nav-login {
        font-size: 18px;
        text-align: center;
        color: var(--bg-white);
    }

    .menu-overlay.active {
        display: block;
        @starting-style {
            transform:  translateX(100%);
        }
    }
    .footer-container.footer-container {
        padding: 24px 1.5rem;
    }
}

/* ============================================
   FOOTER STYLES
   ============================================ */

.footer {
    background-color: #071437;
    color: var(--bg-white);
}

.footer-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 24px 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.footer-logo img {
    max-width: 176px;
    height: auto;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    gap-row: 6px;
}

.footer-links a {
    text-decoration: none;
    color: var(--bg-white);
    font-size: 18px;
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    text-align: center;
    font-size: 14px;
    border-top: 1px solid #9ca3af;
    padding: 16px;
    margin: 0;
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        justify-content: center;
        gap: 10px;
    }

    .footer-links {
        justify-content: center;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        justify-content: flex-start;
        column-gap: 16px;
        row-gap: 0.375rem
    }

    .footer-links a {
        font-size: 16px;
    }
}