/* * Modern Tech Corporate Theme - Redesign
 * Version: 2.0 (High-End Professional)
 * Designed for: SaaS, IT Consulting, Cloud Services
 */

:root {
    /* --- Color Palette: Modern Tech --- */
    /* Primary: Electric Royal Blue */
    --color-primary: #2563EB;
    --color-primary-hover: #1D4ED8;
    --color-primary-light: #EFF6FF;

    /* Secondary: Deep Slate (Text & Headings) */
    --color-dark: #0F172A;
    --color-text: #334155;
    --color-text-light: #64748B;
    --color-text-lighter: #94A3B8;

    /* Backgrounds */
    --color-bg-body: #F8FAFC;
    --color-bg-white: #FFFFFF;
    --color-surface-accent: #F1F5F9;

    /* Semantic */
    --color-border: #E2E8F0;
    --color-success: #10B981;
    --color-cta-bg: #EEF2FF; /* Light Indigo for constraint compliance */

    /* --- Typography --- */
    --font-main: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;

    /* --- Layout & Effects --- */
    --container-width: 1240px;
    --header-height: 80px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Modern Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-card: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    --shadow-header: 0 4px 20px rgba(0, 0, 0, 0.03);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-body);
    color: var(--color-text);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.2s ease;
}

ul, li { list-style: none; }
img { display: block; max-width: 100%; height: auto; }

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

/* === Header & Navigation === */
.site-header {
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.header-inner {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: -0.5px;
}

/* Desktop Nav */
.desktop-nav {
    display: flex;
    gap: 32px;
    align-items: center;
}

.desktop-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 8px 0;
}

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

.desktop-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.desktop-nav a:hover::after,
.desktop-nav a.active::after {
    width: 100%;
}

/* Mobile Menu Trigger */
.mobile-menu-trigger {
    display: none;
    font-size: 1.5rem;
    color: var(--color-dark);
    cursor: pointer;
    padding: 8px;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    background-color: var(--color-bg-white);
    padding: 24px;
    display: none; /* Controlled by JS */
}

.mobile-menu-header {
    margin-bottom: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-mobile {
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--color-dark);
}

.mobile-nav-links a {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark);
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
    display: block;
}

/* === Hero Section (Home) === */
.hero-section {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    color: white;
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
    margin-bottom: 80px;
    text-align: center;
}

/* Decorative subtle glow in hero */
.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-lighter);
    margin-bottom: 48px;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px; /* Pill shape */
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.primary-btn {
    background-color: var(--color-primary);
    color: white;
    border: 1px solid var(--color-primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.primary-btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.secondary-btn {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
}

.secondary-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* === Info Section (Cards) === */
.info-section {
    margin-bottom: 100px;
}

.center-header {
    text-align: center;
    margin-bottom: 60px;
}

.center-header h2 {
    font-size: 2.25rem;
    color: var(--color-dark);
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.center-header p {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.info-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    padding: 48px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.info-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary-light);
}

.info-card .icon {
    font-size: 3rem;
    margin-bottom: 24px;
    background: var(--color-primary-light);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.info-card h3 {
    font-size: 1.5rem;
    color: var(--color-dark);
    margin-bottom: 16px;
    font-weight: 700;
}

.info-card p {
    color: var(--color-text-light);
    margin-bottom: 32px;
    line-height: 1.7;
}

.read-more {
    margin-top: auto;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
}

.read-more:hover {
    text-decoration: none;
    gap: 8px; /* simulates arrow movement */
}

/* === Main Content Area (Lists & Posts) === */
.main-content-area {
    margin-bottom: 100px;
    min-height: 60vh;
}

.section-header {
    margin-bottom: 40px;
    position: relative;
    padding-left: 0;
    border-left: none; /* override default */
}

.section-header h2 {
    font-size: 2rem;
    color: var(--color-dark);
    font-weight: 700;
}

.cat-desc {
    margin-top: 10px;
    font-size: 1.1rem;
    color: var(--color-text-light);
}

/* Post Grid */
.post-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
}

.grid-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.grid-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.card-cover-wrapper {
    height: 220px;
    width: 100%;
    overflow: hidden;
    position: relative;
    background-color: var(--color-surface-accent);
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.card-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-accent);
    color: var(--color-text-lighter);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 1px;
}

.card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-meta {
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}

.cat-tag {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    transition: background 0.2s;
}

.cat-tag:hover {
    background-color: #dbeafe;
}

.grid-card h3 {
    font-size: 1.25rem;
    line-height: 1.4;
    margin-bottom: 12px;
    font-weight: 700;
}

.grid-card h3 a {
    color: var(--color-dark);
}

.grid-card h3 a:hover {
    color: var(--color-primary);
}

.excerpt {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.card-tags {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--color-surface-accent);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-badge {
    font-size: 0.75rem;
    color: var(--color-text-light);
    transition: color 0.2s;
}

.tag-badge:hover {
    color: var(--color-primary);
}

.no-content {
    padding: 40px;
    text-align: center;
    color: var(--color-text-light);
    background: var(--color-surface-accent);
    border-radius: var(--radius-md);
    grid-column: 1 / -1;
}

/* Pagination */
.pagination {
    margin-top: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.page-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg-white);
    color: var(--color-text);
    transition: all 0.2s;
}

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

.page-current {
    font-weight: 600;
    color: var(--color-text);
    margin: 0 12px;
}

/* === Single Post / Page View === */
.single-post {
    background-color: var(--color-bg-white);
    padding: 60px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    max-width: 900px;
    margin: 0 auto; /* Center single post content */
}

.single-header {
    text-align: left;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 30px;
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--color-text-lighter);
    margin-bottom: 20px;
}

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

.breadcrumb span {
    margin: 0 8px;
}

.single-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-dark);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.meta-line {
    font-size: 0.9rem;
    color: var(--color-text-light);
    display: flex;
    gap: 24px;
}

/* Markdown Content Styling */
.markdown-body {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #374151; /* specific slate gray for reading */
}

.markdown-body h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-top: 48px;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
    border-bottom: none;
}

.markdown-body h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-top: 32px;
    margin-bottom: 16px;
}

.markdown-body p {
    margin-bottom: 24px;
}

.markdown-body ul, .markdown-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.markdown-body li {
    margin-bottom: 8px;
    list-style-type: disc;
}

.markdown-body a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    border-bottom: none;
}

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

.markdown-body blockquote {
    border-left: 4px solid var(--color-primary);
    background-color: var(--color-surface-accent);
    padding: 24px;
    margin: 32px 0;
    font-style: italic;
    color: var(--color-text);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.markdown-body img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    margin: 32px 0;
}

.markdown-body hr {
    border: 0;
    height: 1px;
    background: var(--color-border);
    margin: 40px 0;
}

/* Post Tags */
.post-tags-container {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.tags-label {
    font-weight: 700;
    color: var(--color-dark);
    margin-right: 12px;
}

.tag-pill {
    display: inline-block;
    background-color: var(--color-surface-accent);
    color: var(--color-text);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-right: 8px;
    transition: all 0.2s;
}

.tag-pill:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Post CTA - CONSTRAINT COMPLIANCE: Light Background */
.post-cta {
    margin-top: 60px;
    background-color: var(--color-cta-bg); /* VERY LIGHT COLOR */
    border: 1px solid #dbeafe;
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
}

.post-cta p {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 24px;
}

.small-btn {
    padding: 10px 24px;
    font-size: 0.95rem;
}

/* Post Navigation */
.post-navigation {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
}

.nav-prev, .nav-next {
    display: flex;
    flex-direction: column;
    max-width: 45%;
    text-decoration: none;
    transition: transform 0.2s;
}

.nav-prev:hover, .nav-next:hover {
    transform: translateX(0); /* Reset default link effect */
}

.nav-prev small, .nav-next small {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
    color: var(--color-text-lighter);
    margin-bottom: 8px;
    font-weight: 700;
}

.nav-prev span, .nav-next span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
    line-height: 1.4;
    transition: color 0.2s;
}

.nav-prev:hover span, .nav-next:hover span {
    color: var(--color-primary);
}

/* === 404 Page === */
.error-404 {
    text-align: center;
    padding: 100px 0;
}

.error-404 h1 {
    font-size: 6rem;
    color: var(--color-primary);
    font-weight: 800;
    margin-bottom: 20px;
}

.error-404 p {
    font-size: 1.5rem;
    color: var(--color-text-light);
    margin-bottom: 40px;
}

/* === FAQ Section === */
.faq-section {
    padding: 80px 0;
    background-color: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
    border-top: 1px solid var(--color-border);
}

.faq-question {
    padding: 24px 0;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    transition: color 0.2s;
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question .arrow {
    font-weight: 300;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease-out;
}

.faq-answer p {
    padding-bottom: 24px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* === Footer === */
.site-footer {
    background-color: var(--color-dark);
    color: #94a3b8;
    padding: 80px 0 30px;
    font-size: 0.95rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-col h4 {
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.2px;
}

.footer-col p {
    margin-bottom: 16px;
    line-height: 1.6;
}

.footer-col a {
    display: block;
    margin-bottom: 12px;
    color: #cbd5e1;
    transition: all 0.2s;
}

.footer-col a:hover {
    color: var(--color-primary); /* Primary blue really pops on dark bg */
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 32px;
    text-align: center;
    font-size: 0.85rem;
    color: #64748b;
}

.footer-bottom a {
    color: #94a3b8;
    margin-left: 10px;
}

/* === Responsive Design === */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .desktop-nav {
        display: none;
    }
    .mobile-menu-trigger {
        display: block;
    }

    /* Hero */
    .hero-section {
        padding: 80px 0;
    }
    .hero-content h1 {
        font-size: 2.25rem;
    }
    .hero-buttons {
        flex-direction: column;
        padding: 0 40px;
    }
    .btn {
        width: 100%;
    }

    /* Grids */
    .info-grid {
        grid-template-columns: 1fr;
    }
    .post-grid {
        grid-template-columns: 1fr;
    }

    /* Single Post */
    .single-post {
        padding: 30px 20px;
    }
    .single-header h1 {
        font-size: 1.8rem;
    }
    .meta-line {
        flex-direction: column;
        gap: 8px;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    /* Post Nav */
    .post-navigation {
        flex-direction: column;
        gap: 20px;
    }
    .nav-prev, .nav-next {
        max-width: 100%;
    }
    .nav-next {
        text-align: right;
        align-items: flex-end;
    }
}