/*
 * blog.css — Shared article page styles for all Trivikra Tech blog posts
 * Uses CSS custom properties for per-page accent colour theming.
 * Each page sets --accent-1 and --accent-2 in a small inline <style> block.
 *
 * Default theme (BDS — indigo/purple):
 * --accent-1: #213C72
 * --accent-2: #3f2a71
 */

/* ─────────────────────────────────────────────
   CSS Custom Property Defaults
───────────────────────────────────────────── */
:root {
    --accent-1: #213C72;
    --accent-2: #3f2a71;
    --accent-mid: #6366f1;
    --accent-rgb: 99, 102, 241;
}

/* ─────────────────────────────────────────────
   Breadcrumb
───────────────────────────────────────────── */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .82rem;
    color: #94a3b8;
}

.breadcrumb a {
    color: #64748b;
    transition: color .2s;
}

.breadcrumb a:hover {
    color: var(--accent-1);
}

.breadcrumb span {
    color: #cbd5e1;
}

/* ─────────────────────────────────────────────
   Two-column Article Layout
───────────────────────────────────────────── */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 48px;
    align-items: start;
    padding: 64px 0 100px;
}

/* ─────────────────────────────────────────────
   Article Banner
───────────────────────────────────────────── */
.article-banner {
    width: 100%;
    aspect-ratio: 21/8;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.article-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 55%, rgba(255,255,255,.12) 0%, transparent 50%),
        radial-gradient(ellipse at 82% 18%, rgba(255,255,255,.08) 0%, transparent 45%);
}

.article-banner-content {
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 0 24px;
}

.article-banner-icon {
    width: 80px;
    height: 80px;
    border-radius: 22px;
    background: rgba(255,255,255,.12);
    backdrop-filter: blur(10px);
    border: 1.5px solid rgba(255,255,255,.22);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.article-banner-icon svg {
    width: 40px;
    height: 40px;
    stroke: #fff;
}

.article-banner-cat {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 16px;
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.25);
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: .06em;
    text-transform: uppercase;
}

/* ─────────────────────────────────────────────
   Article Meta Bar
───────────────────────────────────────────── */
.article-meta-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.article-cat-chip {
    padding: 4px 14px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.article-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: .8rem;
    color: #94a3b8;
}

.article-meta-sep {
    width: 1px;
    height: 14px;
    background: #e2e8f0;
}

/* ─────────────────────────────────────────────
   Article Typography
───────────────────────────────────────────── */
.article-h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.75rem, 4vw, 2.6rem);
    font-weight: 800;
    color: #0f172a;
    line-height: 1.2;
    letter-spacing: -.025em;
    margin-bottom: 20px;
}

.article-intro {
    font-size: 1.05rem;
    color: #475569;
    line-height: 1.85;
    margin-bottom: 36px;
    padding-bottom: 36px;
    border-bottom: 1px solid #f1f5f9;
}

.article-body h2 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.2rem, 2.5vw, 1.55rem);
    font-weight: 700;
    color: #0f172a;
    margin: 44px 0 14px;
    padding-top: 8px;
    border-top: 2px solid #f1f5f9;
}

.article-body h2:first-child {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
}

.article-body h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e293b;
    margin: 28px 0 10px;
}

.article-body p {
    font-size: .97rem;
    color: #334155;
    line-height: 1.9;
    margin-bottom: 18px;
}

.article-body ul,
.article-body ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-body li {
    font-size: .97rem;
    color: #334155;
    line-height: 1.85;
    margin-bottom: 8px;
}

.article-body li::marker {
    color: var(--accent-mid);
    font-weight: 700;
}

.article-body blockquote {
    border-left: 4px solid var(--accent-mid);
    padding: 16px 22px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb),.04), rgba(var(--accent-rgb),.02));
    border-radius: 0 14px 14px 0;
    margin: 28px 0;
    font-style: italic;
    color: #475569;
    font-size: 1rem;
    line-height: 1.8;
}

/* ─────────────────────────────────────────────
   Highlight Box
───────────────────────────────────────────── */
.highlight-box {
    background: linear-gradient(135deg, rgba(var(--accent-rgb),.05), rgba(var(--accent-rgb),.02));
    border: 1px solid rgba(var(--accent-rgb),.12);
    border-radius: 14px;
    padding: 22px 26px;
    margin: 28px 0;
}

.highlight-box strong {
    display: block;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-1);
    margin-bottom: 8px;
}

.highlight-box p {
    margin: 0;
    font-size: .95rem;
    color: #334155;
}

/* ─────────────────────────────────────────────
   Step Cards
───────────────────────────────────────────── */
.step-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 20px 0 28px;
}

.step-card-item {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    background: #fafbfc;
    border: 1px solid #f1f5f9;
    border-radius: 14px;
    transition: all .25s;
}

.step-card-item:hover {
    border-color: rgba(var(--accent-rgb),.2);
    box-shadow: 0 4px 16px rgba(var(--accent-rgb),.06);
}

.step-num-badge {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: .9rem;
}

.step-card-item h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .95rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 4px;
}

.step-card-item p {
    font-size: .87rem;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

/* ─────────────────────────────────────────────
   Mistake List
───────────────────────────────────────────── */
.mistake-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 20px 0 28px;
}

.mistake-item {
    padding: 16px 18px;
    background: rgba(239,68,68,.03);
    border: 1px solid rgba(239,68,68,.1);
    border-radius: 12px;
}

.mistake-item h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .88rem;
    font-weight: 700;
    color: #dc2626;
    margin-bottom: 4px;
}

.mistake-item p {
    font-size: .84rem;
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

/* ─────────────────────────────────────────────
   Inline CTA Block
───────────────────────────────────────────── */
.article-inline-cta {
    padding: 32px 36px;
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    border-radius: 20px;
    margin: 40px 0;
    text-align: center;
}

.article-inline-cta h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.article-inline-cta p {
    color: rgba(255,255,255,.75);
    font-size: .92rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.article-inline-cta .cta-btns {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-white-outline {
    padding: 11px 28px;
    border: 2px solid rgba(255,255,255,.4);
    border-radius: 999px;
    font-family: 'Inter', sans-serif;
    font-size: .88rem;
    font-weight: 600;
    color: #fff;
    transition: all .2s;
    display: inline-block;
}

.btn-white-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,.1);
}

/* ─────────────────────────────────────────────
   Article Tags
───────────────────────────────────────────── */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 36px 0 0;
    padding-top: 28px;
    border-top: 1px solid #f1f5f9;
}

.article-tag {
    padding: 5px 14px;
    background: #f3f4f6;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 500;
    color: #475569;
    transition: all .2s;
}

.article-tag:hover {
    background: rgba(var(--accent-rgb),.08);
    color: var(--accent-mid);
}

/* ─────────────────────────────────────────────
   Tools / Cards Grid  (2-col)
───────────────────────────────────────────── */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin: 20px 0 28px;
}

.tool-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    background: #fff;
    border: 1.5px solid #e5e7eb;
    border-radius: 14px;
    transition: all .25s;
}

.tool-card:hover {
    border-color: rgba(var(--accent-rgb),.25);
    box-shadow: 0 4px 16px rgba(var(--accent-rgb),.07);
    transform: translateY(-2px);
}

.tool-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.tool-card h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 3px;
}

.tool-card p {
    font-size: .82rem;
    color: #64748b;
    line-height: 1.55;
    margin: 0;
}

/* ─────────────────────────────────────────────
   Tips Grid (2-col)
───────────────────────────────────────────── */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin: 20px 0 28px;
}

.tip-card {
    padding: 18px 20px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb),.04), rgba(var(--accent-rgb),.02));
    border: 1px solid rgba(var(--accent-rgb),.1);
    border-radius: 14px;
    transition: all .25s;
}

.tip-card:hover {
    border-color: rgba(var(--accent-rgb),.2);
}

.tip-card h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 6px;
}

.tip-card p {
    font-size: .84rem;
    color: #475569;
    line-height: 1.6;
    margin: 0;
}

/* ─────────────────────────────────────────────
   Workflow Example (dark box)
───────────────────────────────────────────── */
.workflow-example {
    background: #0f172a;
    border-radius: 14px;
    padding: 22px 24px;
    margin: 20px 0;
}

.workflow-example .wf-label {
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent-mid);
    margin-bottom: 14px;
}

.workflow-steps {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.wf-step {
    padding: 6px 14px;
    background: rgba(var(--accent-rgb),.2);
    border: 1px solid rgba(var(--accent-rgb),.3);
    border-radius: 8px;
    font-size: .82rem;
    font-weight: 600;
    color: #e2e8f0;
}

.wf-arrow {
    color: var(--accent-mid);
    font-size: 1rem;
    font-weight: 700;
}

/* ─────────────────────────────────────────────
   Use-case Grid (3-col) — AI page
───────────────────────────────────────────── */
.usecase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 20px 0 28px;
}

.usecase-card {
    padding: 18px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb),.04), rgba(var(--accent-rgb),.02));
    border: 1px solid rgba(var(--accent-rgb),.1);
    border-radius: 14px;
    text-align: center;
    transition: all .25s;
}

.usecase-card:hover {
    border-color: rgba(var(--accent-rgb),.22);
    transform: translateY(-2px);
}

.usecase-icon {
    font-size: 1.7rem;
    margin-bottom: 10px;
}

.usecase-card h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .88rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 5px;
}

.usecase-card p {
    font-size: .8rem;
    color: #64748b;
    line-height: 1.55;
    margin: 0;
}

/* ─────────────────────────────────────────────
   Sidebar
───────────────────────────────────────────── */
.article-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.toc-box {
    background: #fafbfc;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 24px;
}

.toc-box h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .95rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-list li a {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: .82rem;
    color: #64748b;
    padding: 6px 8px;
    border-radius: 8px;
    line-height: 1.45;
    transition: all .2s;
}

.toc-list li a:hover,
.toc-list li a.active {
    background: rgba(var(--accent-rgb),.06);
    color: var(--accent-mid);
}

.toc-list li a::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #cbd5e1;
    flex-shrink: 0;
    margin-top: 5px;
    transition: background .2s;
}

.toc-list li a:hover::before,
.toc-list li a.active::before {
    background: var(--accent-mid);
}

/* Sidebar CTA */
.sidebar-cta {
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    border-radius: 16px;
    padding: 28px 22px;
    text-align: center;
}

.sidebar-cta h4 {
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.sidebar-cta p {
    font-size: .82rem;
    color: rgba(255,255,255,.7);
    line-height: 1.6;
    margin-bottom: 16px;
}

.sidebar-cta a {
    display: block;
    padding: 10px 0;
    background: rgba(255,255,255,.15);
    border: 1.5px solid rgba(255,255,255,.3);
    border-radius: 10px;
    font-size: .85rem;
    font-weight: 600;
    color: #fff;
    transition: all .2s;
    margin-bottom: 8px;
}

.sidebar-cta a:last-child { margin-bottom: 0; }

.sidebar-cta a:hover { background: rgba(255,255,255,.25); }

/* Share box */
.share-box {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 18px 20px;
}

.share-box h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .88rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

.share-btns { display: flex; gap: 8px; }

.share-btn {
    flex: 1;
    padding: 8px 0;
    border-radius: 8px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid #e5e7eb;
    background: #fff;
    color: #334155;
    transition: all .2s;
    font-family: 'Inter', sans-serif;
}

.share-btn:hover {
    border-color: var(--accent-mid);
    color: var(--accent-mid);
    background: rgba(var(--accent-rgb),.04);
}

/* ─────────────────────────────────────────────
   Related Articles Section
───────────────────────────────────────────── */
.related-section {
    padding: 60px 0 80px;
    background: #fafbfc;
    border-top: 1px solid #f1f5f9;
}

.related-section h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 28px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    overflow: hidden;
    transition: all .3s;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(var(--accent-rgb),.1);
    border-color: rgba(var(--accent-rgb),.2);
}

.related-card-banner {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.related-card-body { padding: 18px; }

.related-card-cat {
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.related-card-title {
    font-family: 'Outfit', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.4;
    margin-bottom: 10px;
}

.related-card a {
    font-size: .78rem;
    font-weight: 600;
    color: var(--accent-mid);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: gap .2s;
}

.related-card a:hover { gap: 8px; }

/* ─────────────────────────────────────────────
   Page-specific component grids
   (Scalable SD: principle, scaling, arch, eval, process, reasons, services)
───────────────────────────────────────────── */

/* 2-col generic grid */
.principle-grid,
.scaling-compare,
.reasons-grid,
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin: 24px 0 32px;
}

/* Principle card */
.principle-card,
.reason-card,
.service-card {
    padding: 20px;
    background: #fff;
    border: 1.5px solid #e5e7eb;
    border-radius: 16px;
    transition: all .3s;
}

.principle-card:hover,
.reason-card:hover,
.service-card:hover {
    border-color: rgba(var(--accent-rgb),.25);
    box-shadow: 0 8px 24px rgba(var(--accent-rgb),.07);
    transform: translateY(-3px);
}

.principle-card-top,
.reason-card,
.service-card-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.principle-icon,
.reason-icon,
.service-num {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.service-num {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: .8rem;
    border-radius: 8px;
    width: 28px;
    height: 28px;
}

.principle-card h4,
.reason-card h4,
.service-card h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    color: #0f172a;
}

.principle-card p,
.reason-card p,
.service-card p {
    font-size: .83rem;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

.principle-tools {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.tool-badge {
    padding: 3px 10px;
    background: rgba(var(--accent-rgb),.06);
    border: 1px solid rgba(var(--accent-rgb),.12);
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
    color: var(--accent-mid);
}

/* Scaling comparison cards */
.scaling-card {
    padding: 20px;
    border-radius: 14px;
    border: 1.5px solid;
}

.scaling-card.vertical {
    background: rgba(99,102,241,.04);
    border-color: rgba(99,102,241,.15);
}

.scaling-card.horizontal {
    background: rgba(var(--accent-rgb),.04);
    border-color: rgba(var(--accent-rgb),.15);
}

.scaling-card h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .95rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.scaling-badge {
    font-size: .65rem;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 999px;
}

.scaling-card.vertical .scaling-badge {
    background: rgba(99,102,241,.12);
    color: #6366f1;
}

.scaling-card.horizontal .scaling-badge {
    background: rgba(var(--accent-rgb),.12);
    color: var(--accent-mid);
}

.scaling-card p {
    font-size: .85rem;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

/* Architecture diagram */
.arch-diagram {
    background: #0f172a;
    border-radius: 16px;
    padding: 28px 24px;
    margin: 24px 0;
}

.arch-label {
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent-mid);
    margin-bottom: 20px;
}

.arch-tier {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.arch-tier-label {
    font-size: .72rem;
    font-weight: 600;
    color: #64748b;
    width: 90px;
    flex-shrink: 0;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.arch-nodes { display: flex; gap: 8px; flex-wrap: wrap; }

.arch-node {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: .82rem;
    font-weight: 600;
    color: #e2e8f0;
}

.arch-node.client  { background: rgba(99,102,241,.2);  border: 1px solid rgba(99,102,241,.3); }
.arch-node.cdn     { background: rgba(234,179,8,.2);   border: 1px solid rgba(234,179,8,.3); }
.arch-node.lb      { background: rgba(225,29,72,.2);   border: 1px solid rgba(225,29,72,.3); }
.arch-node.svc     { background: rgba(249,115,22,.2);  border: 1px solid rgba(249,115,22,.3); }
.arch-node.cache   { background: rgba(34,197,94,.2);   border: 1px solid rgba(34,197,94,.3); }
.arch-node.db      { background: rgba(14,165,233,.2);  border: 1px solid rgba(14,165,233,.3); }
.arch-node.queue   { background: rgba(139,92,246,.2);  border: 1px solid rgba(139,92,246,.3); }

.arch-arrow { color: #475569; font-size: .9rem; }

/* Evaluation steps */
.eval-steps {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 20px 0 28px;
}

.eval-step {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    background: #fafbfc;
    border: 1px solid #f1f5f9;
    border-radius: 14px;
    transition: all .25s;
}

.eval-step:hover {
    border-color: rgba(var(--accent-rgb),.2);
    box-shadow: 0 4px 16px rgba(var(--accent-rgb),.06);
}

.eval-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: .9rem;
}

.eval-step h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .95rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 4px;
}

.eval-step p {
    font-size: .87rem;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

/* Tools grid — 3-col (UI/UX page) */
.tools-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 20px 0 28px;
}

.tool-card-centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 18px 14px;
    text-align: center;
    background: #fff;
    border: 1.5px solid #e5e7eb;
    border-radius: 14px;
    transition: all .25s;
}

.tool-card-centered:hover {
    border-color: rgba(var(--accent-rgb),.25);
    box-shadow: 0 4px 16px rgba(var(--accent-rgb),.07);
    transform: translateY(-2px);
}

.tool-card-centered .tool-icon { font-size: 1.8rem; }
.tool-card-centered h4 {
    font-family: 'Outfit', sans-serif;
    font-size: .88rem;
    font-weight: 700;
    color: #0f172a;
}
.tool-card-centered p {
    font-size: .78rem;
    color: #64748b;
    line-height: 1.5;
    margin: 0;
}

/* Design process flowbar (UI/UX page) */
.process-bar {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 24px 0 32px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.process-step {
    flex: 1;
    min-width: 100px;
    text-align: center;
    padding: 14px 10px;
    background: linear-gradient(135deg, rgba(var(--accent-rgb),.06), rgba(var(--accent-rgb),.03));
    border: 1px solid rgba(var(--accent-rgb),.12);
    position: relative;
}

.process-step:first-child { border-radius: 12px 0 0 12px; }
.process-step:last-child  { border-radius: 0 12px 12px 0; }

.process-step-icon { font-size: 1.4rem; margin-bottom: 6px; }

.process-step h5 {
    font-family: 'Outfit', sans-serif;
    font-size: .78rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
}

.process-arrow {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-mid);
    font-size: 1rem;
    font-weight: 700;
}

/* ─────────────────────────────────────────────
   Responsive
───────────────────────────────────────────── */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        padding: 48px 0 80px;
    }

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

    .related-grid      { grid-template-columns: 1fr 1fr; }
    .usecase-grid      { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .article-h1        { font-size: 1.6rem; }
    .article-banner    { aspect-ratio: 16/7; }
    .article-inline-cta{ padding: 24px 20px; }

    .tools-grid,
    .tools-grid-3,
    .tips-grid,
    .mistake-list,
    .principle-grid,
    .scaling-compare,
    .reasons-grid,
    .services-grid,
    .usecase-grid      { grid-template-columns: 1fr; }

    .related-grid      { grid-template-columns: 1fr; }

    .process-bar       { gap: 4px; }
    .process-arrow     { display: none; }
    .process-step      { border-radius: 10px !important; }

    .workflow-steps    { flex-direction: column; align-items: flex-start; }
    .wf-arrow          { transform: rotate(90deg); }

    .arch-tier         { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .article-layout    { padding: 32px 0 60px; }
    .article-body h2   { font-size: 1.15rem; }
    .article-banner    { border-radius: 14px; }
}