/* ============================================================
   amBit Theme — World-class Technology Newsroom & Research Hub
   Design inspired by: OpenAI, Stripe, Apple, Anthropic, DeepMind
   ============================================================ */

/* ── Design Tokens ── */
:root {
    /* Core palette */
    --ab-neon: #22c55e;
    --ab-neon-dim: rgba(34, 197, 94, 0.15);
    --ab-neon-glow: rgba(34, 197, 94, 0.4);
    --ab-black: #000000;
    --ab-bg: #050a0e;
    --ab-bg-card: rgba(15, 23, 35, 0.6);
    --ab-bg-card-hover: rgba(20, 30, 48, 0.8);
    --ab-navy: #0a1628;
    --ab-navy-light: #111d33;
    --ab-surface: rgba(255, 255, 255, 0.03);
    --ab-border: rgba(255, 255, 255, 0.06);
    --ab-border-hover: rgba(255, 255, 255, 0.12);

    /* Text */
    --ab-text: #e2e8f0;
    --ab-text-secondary: #94a3b8;
    --ab-text-muted: #64748b;
    --ab-text-heading: #f8fafc;

    /* Spacing */
    --ab-space-xs: 0.25rem;
    --ab-space-sm: 0.5rem;
    --ab-space-md: 1rem;
    --ab-space-lg: 1.5rem;
    --ab-space-xl: 2rem;
    --ab-space-2xl: 3rem;
    --ab-space-3xl: 4rem;
    --ab-space-4xl: 6rem;

    /* Radius */
    --ab-radius-sm: 6px;
    --ab-radius-md: 10px;
    --ab-radius-lg: 16px;
    --ab-radius-xl: 24px;

    /* Typography */
    --ab-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --ab-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transition */
    --ab-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --ab-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Container */
    --ab-container-max: 1200px;
    --ab-container-narrow: 720px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--ab-font);
    background: var(--ab-bg);
    color: var(--ab-text);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--ab-transition);
}

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

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

/* ── Layout ── */
.ab-viewport {
    min-height: 100vh;
    position: relative;
}

.ab-container {
    max-width: var(--ab-container-max);
    margin: 0 auto;
    padding: 0 var(--ab-space-xl);
}

.ab-container-narrow {
    max-width: var(--ab-container-narrow);
}

.ab-main {
    padding-top: 80px;
    /* nav height */
}

/* ── Particle Canvas ── */
.ab-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

/* ── Navigation ── */
.ab-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(5, 10, 14, 0.8);
    border-bottom: 1px solid var(--ab-border);
    transition: var(--ab-transition);
}

.ab-nav.scrolled {
    background: rgba(5, 10, 14, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.ab-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--ab-container-max);
    margin: 0 auto;
    padding: 0 var(--ab-space-xl);
    height: 72px;
}

.ab-logo {
    display: flex;
    align-items: center;
    gap: var(--ab-space-sm);
    z-index: 1001;
}

.ab-logo img {
    height: 32px;
}

.ab-logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.ab-logo-icon {
    width: 28px;
    height: 28px;
    display: inline-block;
}

.ab-logo-am {
    color: var(--ab-text-heading);
}

.ab-logo-bit {
    color: var(--ab-neon);
}

.ab-nav-links {
    display: flex;
    gap: var(--ab-space-xl);
}

.ab-nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ab-text-secondary);
    position: relative;
    padding: var(--ab-space-sm) 0;
    letter-spacing: 0.01em;
}

.ab-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--ab-neon);
    transition: var(--ab-transition);
    border-radius: 1px;
}

.ab-nav-link:hover {
    color: var(--ab-text-heading);
}

.ab-nav-link:hover::after {
    width: 100%;
}

.ab-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--ab-space-md);
}

.ab-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--ab-text-secondary);
    transition: var(--ab-transition);
}

.ab-nav-btn:hover {
    color: var(--ab-text-heading);
    background: var(--ab-surface);
}

.ab-lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--ab-border);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ab-text-secondary);
    transition: var(--ab-transition);
    letter-spacing: 0.05em;
}

.ab-lang-toggle:hover {
    border-color: var(--ab-neon);
    color: var(--ab-neon);
}

.ab-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--ab-space-sm);
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--ab-surface);
    border: 1px solid var(--ab-border);
    transition: var(--ab-transition);
    white-space: nowrap;
}

.ab-btn:hover {
    border-color: var(--ab-border-hover);
    background: rgba(255, 255, 255, 0.06);
}

.ab-btn-glow {
    background: var(--ab-neon);
    color: var(--ab-black);
    border-color: var(--ab-neon);
    box-shadow: 0 0 20px var(--ab-neon-dim);
}

.ab-btn-glow:hover {
    background: #16a34a;
    border-color: #16a34a;
    box-shadow: 0 0 30px var(--ab-neon-glow);
    transform: translateY(-1px);
    color: var(--ab-black);
}

/* Mobile Menu Toggle */
.ab-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    z-index: 1001;
}

.ab-menu-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--ab-text);
    border-radius: 1px;
    transition: var(--ab-transition);
}

.ab-menu-toggle.active .ab-menu-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.ab-menu-toggle.active .ab-menu-bar:nth-child(2) {
    opacity: 0;
}

.ab-menu-toggle.active .ab-menu-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.ab-mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 10, 14, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--ab-space-2xl);
    z-index: 999;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--ab-transition);
}

.ab-mobile-menu.active {
    opacity: 1;
    transform: translateY(0);
}

.ab-mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--ab-space-lg);
}

.ab-mobile-link {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--ab-text-secondary);
    padding: var(--ab-space-sm) 0;
    border-bottom: 1px solid var(--ab-border);
}

.ab-mobile-link:hover {
    color: var(--ab-neon);
}

.ab-mobile-cta {
    margin-top: var(--ab-space-xl);
    text-align: center;
    justify-content: center;
    padding: 14px;
}

/* ── Reading Progress ── */
.ab-reading-progress {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 999;
    background: transparent;
}

.ab-reading-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--ab-neon), #10b981);
    box-shadow: 0 0 10px var(--ab-neon-glow);
    transition: width 0.1s linear;
}

/* ── Hero Section ── */
.ab-hero {
    position: relative;
    padding: var(--ab-space-4xl) var(--ab-space-xl);
    text-align: center;
    overflow: hidden;
    min-height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ab-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--ab-neon-dim) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.3;
}

.ab-hero-inner {
    position: relative;
    z-index: 1;
}

.ab-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--ab-space-sm);
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--ab-neon-dim);
    background: rgba(34, 197, 94, 0.05);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ab-neon);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: var(--ab-space-xl);
    animation: fadeInUp 0.8s ease-out;
}

.ab-hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: var(--ab-space-lg);
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.ab-hero-title-line {
    display: block;
    color: var(--ab-text-heading);
}

.ab-hero-title-accent {
    display: block;
    background: linear-gradient(135deg, var(--ab-neon), #10b981, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ab-hero-subtitle {
    font-size: 1.25rem;
    color: var(--ab-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* ── Category Navigation ── */
.ab-categories {
    padding: var(--ab-space-lg) 0;
    border-bottom: 1px solid var(--ab-border);
    position: sticky;
    top: 72px;
    z-index: 100;
    background: rgba(5, 10, 14, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.ab-category-nav {
    display: flex;
    gap: var(--ab-space-xs);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 4px;
}

.ab-category-nav::-webkit-scrollbar {
    display: none;
}

.ab-category-link {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ab-text-secondary);
    white-space: nowrap;
    transition: var(--ab-transition);
}

.ab-category-link:hover {
    color: var(--ab-text-heading);
    background: var(--ab-surface);
}

.ab-category-link.ab-active {
    color: var(--ab-black);
    background: var(--ab-neon);
    font-weight: 600;
}

/* ── Section Header ── */
.ab-section-header {
    display: flex;
    align-items: center;
    gap: var(--ab-space-lg);
    margin-bottom: var(--ab-space-2xl);
}

.ab-section-title {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ab-text-muted);
    white-space: nowrap;
}

.ab-section-line {
    flex: 1;
    height: 1px;
    background: var(--ab-border);
}

/* ── Featured Article ── */
.ab-featured {
    padding: var(--ab-space-3xl) 0;
}

.ab-featured-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ab-neon);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--ab-space-lg);
}

.ab-featured-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--ab-space-2xl);
    background: var(--ab-bg-card);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-xl);
    overflow: hidden;
    transition: var(--ab-transition-slow);
}

.ab-featured-card:hover {
    border-color: var(--ab-border-hover);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px var(--ab-neon-dim);
    transform: translateY(-2px);
}

.ab-featured-image-link {
    display: block;
    overflow: hidden;
}

.ab-featured-image {
    width: 100%;
    height: 100%;
    min-height: 360px;
    background-size: cover;
    background-position: center;
    transition: var(--ab-transition-slow);
}

.ab-featured-card:hover .ab-featured-image {
    transform: scale(1.03);
}

.ab-featured-content {
    padding: var(--ab-space-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.ab-tag-badge {
    display: inline-flex;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--ab-neon-dim);
    color: var(--ab-neon);
    align-self: flex-start;
    margin-bottom: var(--ab-space-md);
    transition: var(--ab-transition);
}

.ab-tag-badge:hover {
    background: var(--ab-neon);
    color: var(--ab-black);
}

.ab-featured-title {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: var(--ab-space-md);
}

.ab-featured-title a:hover {
    color: var(--ab-neon);
}

.ab-featured-excerpt {
    color: var(--ab-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--ab-space-lg);
}

.ab-featured-meta,
.ab-post-meta {
    display: flex;
    align-items: center;
    gap: var(--ab-space-sm);
    font-size: 0.8rem;
    color: var(--ab-text-muted);
    flex-wrap: wrap;
}

.ab-author-inline {
    display: flex;
    align-items: center;
    gap: var(--ab-space-sm);
}

.ab-author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.ab-avatar-placeholder {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--ab-neon-dim);
    color: var(--ab-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
}

.ab-meta-divider {
    color: var(--ab-border-hover);
}

/* ── Articles Grid ── */
.ab-articles {
    padding: var(--ab-space-3xl) 0;
}

.ab-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--ab-space-xl);
}

/* ── Article Card ── */
.ab-card {
    background: var(--ab-bg-card);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-lg);
    overflow: hidden;
    transition: var(--ab-transition-slow);
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.6s ease-out both;
}

.ab-card:nth-child(2) {
    animation-delay: 0.1s;
}

.ab-card:nth-child(3) {
    animation-delay: 0.2s;
}

.ab-card:nth-child(4) {
    animation-delay: 0.1s;
}

.ab-card:nth-child(5) {
    animation-delay: 0.2s;
}

.ab-card:nth-child(6) {
    animation-delay: 0.3s;
}

.ab-card:hover {
    border-color: var(--ab-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25), 0 0 24px var(--ab-neon-dim);
}

.ab-card-image-link {
    display: block;
    overflow: hidden;
}

.ab-card-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
    transition: var(--ab-transition-slow);
}

.ab-card:hover .ab-card-image {
    transform: scale(1.05);
}

.ab-card-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(5, 10, 14, 0.4) 100%);
}

.ab-card-no-image {
    background: linear-gradient(135deg, var(--ab-navy), var(--ab-navy-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.ab-card-placeholder-icon {
    color: var(--ab-text-muted);
    opacity: 0.3;
}

.ab-card-body {
    padding: var(--ab-space-lg);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.ab-card-tag {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ab-neon);
    margin-bottom: var(--ab-space-sm);
}

.ab-card-tag:hover {
    text-decoration: underline;
}

.ab-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.01em;
    margin-bottom: var(--ab-space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ab-card-title a:hover {
    color: var(--ab-neon);
}

.ab-card-excerpt {
    font-size: 0.875rem;
    color: var(--ab-text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--ab-space-md);
    flex: 1;
}

.ab-card-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--ab-text-muted);
    margin-top: auto;
    padding-top: var(--ab-space-md);
    border-top: 1px solid var(--ab-border);
}

/* ── Pagination ── */
.ab-pagination {
    padding: var(--ab-space-2xl) 0 var(--ab-space-4xl);
}

.ab-pagination .ab-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--ab-space-xl);
}

.ab-pagination-link {
    display: inline-flex;
    align-items: center;
    gap: var(--ab-space-sm);
    padding: 10px 20px;
    border-radius: var(--ab-radius-md);
    border: 1px solid var(--ab-border);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ab-text-secondary);
}

.ab-pagination-link:hover {
    border-color: var(--ab-neon);
    color: var(--ab-neon);
}

.ab-pagination-info {
    font-size: 0.8rem;
    color: var(--ab-text-muted);
}

/* ── Post Page ── */
.ab-post-header {
    padding: var(--ab-space-4xl) var(--ab-space-xl) var(--ab-space-2xl);
    text-align: center;
}

.ab-post-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: var(--ab-space-md);
    color: var(--ab-text-heading);
    animation: fadeInUp 0.6s ease-out;
}

.ab-post-excerpt {
    font-size: 1.15rem;
    color: var(--ab-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--ab-space-xl);
    line-height: 1.6;
}

.ab-post-meta {
    justify-content: center;
}

.ab-post-feature-image {
    max-width: 960px;
    margin: 0 auto var(--ab-space-3xl);
    border-radius: var(--ab-radius-lg);
    overflow: hidden;
}

.ab-post-feature-image img {
    width: 100%;
    display: block;
}

.ab-post-feature-image figcaption {
    text-align: center;
    font-size: 0.8rem;
    color: var(--ab-text-muted);
    padding: var(--ab-space-md);
}

/* ── Post Content ── */
.ab-post-content {
    padding-bottom: var(--ab-space-3xl);
}

.ab-post-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-top: var(--ab-space-3xl);
    margin-bottom: var(--ab-space-md);
    letter-spacing: -0.02em;
    color: var(--ab-text-heading);
}

.ab-post-content h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-top: var(--ab-space-2xl);
    margin-bottom: var(--ab-space-md);
    color: var(--ab-text-heading);
}

.ab-post-content p {
    margin-bottom: var(--ab-space-lg);
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--ab-text);
}

.ab-post-content a {
    color: var(--ab-neon);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.ab-post-content a:hover {
    opacity: 0.8;
}

.ab-post-content ul,
.ab-post-content ol {
    margin-bottom: var(--ab-space-lg);
    padding-left: var(--ab-space-xl);
}

.ab-post-content li {
    margin-bottom: var(--ab-space-sm);
    line-height: 1.7;
}

.ab-post-content blockquote {
    border-left: 3px solid var(--ab-neon);
    padding: var(--ab-space-md) var(--ab-space-xl);
    margin: var(--ab-space-2xl) 0;
    background: var(--ab-neon-dim);
    border-radius: 0 var(--ab-radius-md) var(--ab-radius-md) 0;
    font-style: italic;
    color: var(--ab-text-secondary);
}

.ab-post-content pre {
    background: var(--ab-navy);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-md);
    padding: var(--ab-space-lg);
    margin-bottom: var(--ab-space-lg);
    overflow-x: auto;
    font-family: var(--ab-font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.ab-post-content code {
    font-family: var(--ab-font-mono);
    font-size: 0.85em;
    background: rgba(255, 255, 255, 0.06);
    padding: 2px 6px;
    border-radius: 4px;
}

.ab-post-content pre code {
    background: none;
    padding: 0;
}

.ab-post-content img {
    border-radius: var(--ab-radius-md);
    margin: var(--ab-space-2xl) auto;
}

.ab-post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--ab-space-lg);
    font-size: 0.9rem;
}

.ab-post-content th,
.ab-post-content td {
    padding: var(--ab-space-md);
    border: 1px solid var(--ab-border);
    text-align: left;
}

.ab-post-content th {
    background: var(--ab-navy);
    font-weight: 600;
    color: var(--ab-text-heading);
}

.ab-post-content figure {
    margin: var(--ab-space-2xl) 0;
}

.ab-post-content figcaption {
    text-align: center;
    font-size: 0.8rem;
    color: var(--ab-text-muted);
    margin-top: var(--ab-space-sm);
}

/* Ghost card overrides */
.ab-post-content .kg-card {
    margin: var(--ab-space-2xl) 0;
}

.ab-post-content .kg-image-card img,
.ab-post-content .kg-gallery-image img {
    border-radius: var(--ab-radius-md);
}

.ab-post-content .kg-width-wide {
    max-width: 960px;
    margin-left: calc(50% - 480px);
    margin-right: calc(50% - 480px);
}

.ab-post-content .kg-width-full {
    max-width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
}

.ab-post-content .kg-callout-card {
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-md);
    padding: var(--ab-space-lg);
    background: var(--ab-bg-card);
}

/* ── Post Tags ── */
.ab-post-tags {
    padding: var(--ab-space-xl) 0;
    border-top: 1px solid var(--ab-border);
}

.ab-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--ab-space-sm);
}

.ab-tag-pill {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    background: var(--ab-surface);
    border: 1px solid var(--ab-border);
    color: var(--ab-text-secondary);
}

.ab-tag-pill:hover {
    border-color: var(--ab-neon);
    color: var(--ab-neon);
    background: var(--ab-neon-dim);
}

/* ── Share ── */
.ab-share {
    padding: var(--ab-space-xl) 0;
    display: flex;
    align-items: center;
    gap: var(--ab-space-lg);
}

.ab-share-title {
    font-size: 0.8rem;
    color: var(--ab-text-muted);
    font-weight: 500;
}

.ab-share-buttons {
    display: flex;
    gap: var(--ab-space-sm);
}

.ab-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--ab-surface);
    border: 1px solid var(--ab-border);
    color: var(--ab-text-secondary);
    transition: var(--ab-transition);
}

.ab-share-btn:hover {
    border-color: var(--ab-neon);
    color: var(--ab-neon);
    background: var(--ab-neon-dim);
}

/* ── Author Section ── */
.ab-author-section {
    padding: var(--ab-space-2xl) 0;
    border-top: 1px solid var(--ab-border);
}

.ab-author-card {
    display: flex;
    gap: var(--ab-space-lg);
    padding: var(--ab-space-xl);
    background: var(--ab-bg-card);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-lg);
}

.ab-author-card-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.ab-avatar-placeholder-lg {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--ab-neon-dim);
    color: var(--ab-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.ab-author-card-name {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.ab-author-card-name a:hover {
    color: var(--ab-neon);
}

.ab-author-card-bio {
    font-size: 0.875rem;
    color: var(--ab-text-secondary);
    line-height: 1.6;
}

/* ── Related Articles ── */
.ab-related {
    padding: var(--ab-space-3xl) 0;
    border-top: 1px solid var(--ab-border);
}

/* ── Tag Page ── */
.ab-tag-header {
    padding: var(--ab-space-4xl) var(--ab-space-xl) var(--ab-space-2xl);
    text-align: center;
}

.ab-tag-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--ab-text-heading);
    margin: var(--ab-space-md) 0;
}

.ab-tag-description {
    font-size: 1.1rem;
    color: var(--ab-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--ab-space-md);
}

.ab-tag-count {
    font-size: 0.85rem;
    color: var(--ab-text-muted);
}

/* ── Author Page ── */
.ab-author-header {
    padding: var(--ab-space-4xl) var(--ab-space-xl) var(--ab-space-2xl);
}

.ab-author-profile {
    display: flex;
    align-items: center;
    gap: var(--ab-space-xl);
    max-width: var(--ab-container-narrow);
    margin: 0 auto;
}

.ab-author-profile-avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 3px solid var(--ab-neon-dim);
}

.ab-avatar-placeholder-xl {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: var(--ab-neon-dim);
    color: var(--ab-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.ab-author-profile-name {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.ab-author-profile-bio {
    color: var(--ab-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--ab-space-sm);
}

.ab-author-profile-meta {
    display: flex;
    gap: var(--ab-space-lg);
    font-size: 0.8rem;
    color: var(--ab-text-muted);
}

.ab-author-location,
.ab-author-website,
.ab-author-social {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ab-author-website:hover,
.ab-author-social:hover {
    color: var(--ab-neon);
}

/* ── Page ── */
.ab-page-header {
    padding: var(--ab-space-4xl) var(--ab-space-xl) var(--ab-space-2xl);
    text-align: center;
}

.ab-page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--ab-text-heading);
}

/* ── Newsletter ── */
.ab-newsletter {
    padding: var(--ab-space-4xl) 0;
}

.ab-newsletter-card {
    position: relative;
    padding: var(--ab-space-3xl);
    background: var(--ab-bg-card);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-xl);
    text-align: center;
    overflow: hidden;
}

.ab-newsletter-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--ab-neon-dim) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
}

.ab-newsletter-content {
    position: relative;
    z-index: 1;
}

.ab-newsletter-title {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--ab-space-md);
    color: var(--ab-text-heading);
}

.ab-newsletter-desc {
    color: var(--ab-text-secondary);
    max-width: 480px;
    margin: 0 auto var(--ab-space-xl);
    line-height: 1.6;
}

.ab-newsletter-form {
    max-width: 440px;
    margin: 0 auto;
}

.ab-newsletter-input-wrap {
    display: flex;
    gap: var(--ab-space-sm);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--ab-border);
    border-radius: var(--ab-radius-md);
    padding: 4px;
    transition: var(--ab-transition);
}

.ab-newsletter-input-wrap:focus-within {
    border-color: var(--ab-neon);
    box-shadow: 0 0 20px var(--ab-neon-dim);
}

.ab-newsletter-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 10px 14px;
    color: var(--ab-text);
    font-family: var(--ab-font);
    font-size: 0.9rem;
}

.ab-newsletter-input::placeholder {
    color: var(--ab-text-muted);
}

.ab-newsletter-btn {
    padding: 10px 24px;
    border-radius: 8px;
    background: var(--ab-neon);
    color: var(--ab-black);
    font-weight: 700;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: var(--ab-transition);
    white-space: nowrap;
}

.ab-newsletter-btn:hover {
    background: #16a34a;
    box-shadow: 0 0 20px var(--ab-neon-glow);
}

.ab-newsletter-btn-loading {
    display: none;
}

.loading .ab-newsletter-btn-text {
    display: none;
}

.loading .ab-newsletter-btn-loading {
    display: inline-flex;
    animation: spin 1s linear infinite;
}

.ab-newsletter-message {
    display: none;
    margin-top: var(--ab-space-md);
    font-size: 0.85rem;
    gap: 6px;
    align-items: center;
    justify-content: center;
}

.ab-newsletter-success {
    color: var(--ab-neon);
}

.ab-newsletter-error {
    color: #ef4444;
}

/* ── Error Page ── */
.ab-error {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--ab-space-4xl);
}

.ab-error-code {
    font-size: clamp(4rem, 15vw, 10rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--ab-neon), #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--ab-space-md);
}

.ab-error-message {
    font-size: 1.25rem;
    color: var(--ab-text-secondary);
    margin-bottom: var(--ab-space-2xl);
}

/* ── Footer ── */
.ab-footer {
    border-top: 1px solid var(--ab-border);
    padding: var(--ab-space-3xl) 0 var(--ab-space-2xl);
    background: rgba(0, 0, 0, 0.3);
}

.ab-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--ab-space-3xl);
    margin-bottom: var(--ab-space-3xl);
}

.ab-footer-tagline {
    font-size: 0.9rem;
    color: var(--ab-text-muted);
    margin-top: var(--ab-space-md);
    line-height: 1.6;
}

.ab-footer-heading {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ab-text-muted);
    margin-bottom: var(--ab-space-lg);
}

.ab-footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--ab-space-sm);
}

.ab-footer-links a {
    font-size: 0.875rem;
    color: var(--ab-text-secondary);
}

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

.ab-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--ab-space-xl);
    border-top: 1px solid var(--ab-border);
}

.ab-footer-copyright {
    font-size: 0.8rem;
    color: var(--ab-text-muted);
}

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

.ab-footer-social a {
    color: var(--ab-text-muted);
    transition: var(--ab-transition);
}

.ab-footer-social a:hover {
    color: var(--ab-neon);
}

/* ── Animations ── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .ab-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ab-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--ab-space-2xl);
    }
}

@media (max-width: 768px) {
    .ab-nav-links {
        display: none;
    }

    .ab-menu-toggle {
        display: flex;
    }

    .ab-mobile-menu.active {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

    .ab-hero {
        padding: var(--ab-space-3xl) var(--ab-space-md);
        min-height: 320px;
    }

    .ab-hero-title {
        font-size: clamp(2.5rem, 10vw, 3.5rem);
    }

    .ab-container {
        padding: 0 var(--ab-space-md);
    }

    .ab-grid {
        grid-template-columns: 1fr;
        gap: var(--ab-space-lg);
    }

    .ab-featured-card {
        grid-template-columns: 1fr;
    }

    .ab-featured-image {
        min-height: 220px;
    }

    .ab-featured-content {
        padding: var(--ab-space-lg);
    }

    .ab-footer-grid {
        grid-template-columns: 1fr;
        gap: var(--ab-space-xl);
    }

    .ab-footer-bottom {
        flex-direction: column;
        gap: var(--ab-space-md);
        text-align: center;
    }

    .ab-author-profile {
        flex-direction: column;
        text-align: center;
    }

    .ab-author-profile-meta {
        justify-content: center;
    }

    .ab-share {
        flex-direction: column;
        align-items: flex-start;
    }

    .ab-post-content .kg-width-wide {
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
    }

    .ab-categories {
        top: 72px;
    }

    .ab-newsletter-card {
        padding: var(--ab-space-2xl) var(--ab-space-lg);
    }

    .ab-newsletter-input-wrap {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .ab-hero-subtitle {
        font-size: 1rem;
    }

    .ab-post-title {
        font-size: 1.75rem;
    }

    .ab-card-image {
        height: 160px;
    }

    .ab-lang-toggle {
        display: none;
    }
}

/* ── Scroll Animations ── */
.ab-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.ab-fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}