/* =========================================
   2. MAIN STYLESHEET
   ========================================= */
@import 'variables.css';

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

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

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    line-height: var(--line-height-body);
    font-size: var(--text-base);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-slow) forwards;
}

a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent);
}

ul {
    list-style: none;
}

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

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

/* -------------------------------------
   Typography
   ------------------------------------- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-bold);
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-3);
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--text-4xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-3xl);
    letter-spacing: -0.015em;
}

h3 {
    font-size: var(--text-2xl);
    letter-spacing: -0.01em;
}

h4 {
    font-size: var(--text-xl);
}

h5 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
}

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

.text-small {
    font-size: var(--text-sm);
}

.text-xs {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: var(--font-bold);
}

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

.section {
    padding: var(--spacing-12) 0;
    border-bottom: 1px solid var(--color-border);
}

.grid {
    display: grid;
    gap: var(--spacing-8);
}

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

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

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

.layout-main-sidebar {
    grid-template-columns: 2fr 1fr;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--spacing-2);
}

.gap-4 {
    gap: var(--spacing-4);
}

/* -------------------------------------
   Header
   ------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-4) 0;
    transition: all var(--transition-normal);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.03em;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-6);
    margin: 0;
    padding: 0;
}

.main-nav li {
    position: relative;
    padding: var(--spacing-2) 0;
}

.main-nav a {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    display: block;
}

.main-nav a:hover {
    color: var(--color-accent);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-shadow: var(--shadow-md);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-2) 0;
    gap: 0;
}

.main-nav li:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
}

.dropdown-menu a:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-accent);
}

/* Sub-category Pills (for Category Page) */
.sub-category-nav {
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg);
    margin-bottom: var(--spacing-8);
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
}

.sub-nav-pills {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-3) 0;
}

.nav-pill {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: 999px;
    /* Pill shape */
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.nav-pill:hover,
.nav-pill.active {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: var(--color-text-primary);
}

.theme-toggle:hover {
    background-color: var(--color-bg-alt);
}

.btn-subscribe {
    background-color: var(--color-accent);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: 4px;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    transition: background-color 0.2s;
}

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

/* -------------------------------------
   Hero Section
   ------------------------------------- */
.hero-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.hero-featured {
    position: relative;
    display: flex;
    flex-direction: column;
}

.hero-secondary {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

/* -------------------------------------
   Article Card - General
   ------------------------------------- */
.card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-image {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    object-position: center;
    border-radius: 8px;
    margin-bottom: var(--spacing-3);
    background-color: var(--color-bg-alt);
    transition: transform var(--transition-normal);
}

.card:hover .card-image {
    transform: scale(1.02);
}

.card-meta {
    font-size: var(--text-xs);
    color: var(--color-accent);
    margin-bottom: var(--spacing-2);
}

.card-title {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2);
    transition: color var(--transition-fast);
}

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

.card-excerpt {
    font-size: var(--text-sm);
    line-height: 1.5;
    color: var(--color-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Reading Progress Bar */
.progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 1001;
    background: transparent;
}

.progress-bar {
    height: 100%;
    background: var(--color-accent);
    width: 0%;
    transition: width 0.1s ease;
}

.article-hero-img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: var(--spacing-8);
    object-fit: cover;
    max-height: 500px;
}

/* -------------------------------------
   Sidebar
   ------------------------------------- */
.sidebar-sticky {
    position: sticky;
    top: 80px;
    /* Header height + buffer */
}

.widget {
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-8);
    border-bottom: 1px solid var(--color-border);
}

.widget-title {
    font-size: var(--text-sm);
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4);
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-2);
}

/* -------------------------------------
   Newsletter Section
   ------------------------------------- */
.newsletter-section {
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    padding: var(--spacing-12) var(--spacing-4);
    text-align: center;
    max-width: 800px;
    margin: var(--spacing-16) auto;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
    max-width: 500px;
    margin: var(--spacing-6) auto 0;
}

.input-field {
    flex: 1;
    padding: var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-bg);
    color: var(--color-text-primary);
}

/* -------------------------------------
   Footer
   ------------------------------------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-12) 0;
    margin-top: var(--spacing-16);
    background-color: var(--color-bg);
}

/* -------------------------------------
   Responsive
   ------------------------------------- */
/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    color: var(--color-text-primary);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-2);
}

@media (max-width: 1024px) {
    .container {
        max-width: 960px;
    }

    .hero-wrapper {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {

    .grid-cols-3,
    .grid-cols-2,
    .grid-cols-4,
    .layout-main-sidebar {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 var(--spacing-4);
        /* Add horizontal breathing room */
    }

    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }

    .main-nav.active {
        transform: translateX(0);
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-4) 0;
    }

    .main-nav li {
        border-bottom: 1px solid var(--color-border);
        padding: 0;
    }

    .main-nav>ul>li>a {
        display: block;
        padding: var(--spacing-3) var(--spacing-4);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid var(--color-border);
        border-radius: 0;
        background-color: var(--color-bg-alt);
        display: none;
    }

    .main-nav li.submenu-open .dropdown-menu {
        display: flex;
    }

    /* Mobile menu implementation later */
    .hero-wrapper {
        gap: var(--spacing-6);
    }

    h1 {
        font-size: var(--text-3xl);
    }

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