/* ==========================================================================
   Axis Puls Article & SEO Landing Page Stylesheet
   Supports Light & Dark themes with flawless contrast, zero color clashes,
   and rich E-E-A-T article components.
   ========================================================================== */

/* Dark Mode (Default) Variables */
:root {
    --art-bg: #061824;
    --art-card-bg: rgba(10, 34, 51, 0.88);
    --art-card-border: rgba(255, 255, 255, 0.12);
    --art-text: #f1f5f9;
    --art-text-muted: #cbd5e1;
    --art-heading: #ffffff;
    --art-link: #38bdf8;
    --art-link-hover: #7dd3fc;
    --art-primary: #a855f7;
    --art-primary-glow: rgba(168, 85, 247, 0.28);
    --art-secondary: #38bdf8;
    --art-accent: #f472b6;
    --art-box-bg: rgba(168, 85, 247, 0.1);
    --art-box-border: rgba(168, 85, 247, 0.35);
    --art-badge-bg: rgba(56, 189, 248, 0.15);
    --art-badge-text: #7dd3fc;
    --art-rec-bg: rgba(14, 165, 233, 0.1);
    --art-rec-border: #0284c7;
    --art-rec-title: #38bdf8;
    --art-checklist-bg: rgba(34, 197, 94, 0.1);
    --art-checklist-border: #22c55e;
    --art-checklist-title: #4ade80;
    --art-code-bg: #0c2333;
    --art-toc-bg: rgba(15, 45, 68, 0.85);
    --art-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    --art-hover-bg: rgba(255, 255, 255, 0.08);
    --art-faq-bg: rgba(10, 34, 51, 0.75);
    --art-hero-bg: linear-gradient(135deg, #0f2b48 0%, #173b5c 50%, #0c2338 100%);
    --art-table-header-bg: #0f334c;
    --art-table-stripe-bg: rgba(255, 255, 255, 0.03);
}

/* Light Mode Overrides */
[data-theme="light"] {
    --art-bg: #f8fafc;
    --art-card-bg: #ffffff;
    --art-card-border: #e2e8f0;
    --art-text: #0f172a;
    --art-text-muted: #334155;
    --art-heading: #09111e;
    --art-link: #0284c7;
    --art-link-hover: #0369a1;
    --art-primary: #7c3aed;
    --art-primary-glow: rgba(124, 58, 237, 0.15);
    --art-secondary: #0284c7;
    --art-accent: #c026d3;
    --art-box-bg: #f3e8ff;
    --art-box-border: #d8b4fe;
    --art-badge-bg: #e0f2fe;
    --art-badge-text: #0369a1;
    --art-rec-bg: #f0f9ff;
    --art-rec-border: #0284c7;
    --art-rec-title: #0369a1;
    --art-checklist-bg: #f0fdf4;
    --art-checklist-border: #16a34a;
    --art-checklist-title: #15803d;
    --art-code-bg: #f1f5f9;
    --art-toc-bg: #f8fafc;
    --art-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    --art-hover-bg: #f1f5f9;
    --art-faq-bg: #f8fafc;
    --art-hero-bg: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 50%, #fae8ff 100%);
    --art-table-header-bg: #f1f5f9;
    --art-table-stripe-bg: #f8fafc;
}

/* Base Styles */
html {
    scroll-padding-top: 90px;
    scroll-behavior: smooth;
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body {
    background-color: var(--art-bg);
    color: var(--art-text);
    font-family: 'Vazirmatn', system-ui, -apple-system, sans-serif;
    line-height: 1.85;
    margin: 0;
    padding: 0;
    /* NOTCH FIX (see main.css body): keep in-flow content below the iOS
       status bar in standalone/fullscreen web-app mode. */
    padding-top: env(safe-area-inset-top, 0px);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--art-link-hover);
    text-decoration: underline;
}

/* Navbar */
.article-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 14px 5%;
    /* NOTCH FIX (iOS standalone/Safari cover mode): bar stays glued under
       the notch while buttons clear it. 0px elsewhere — desktop unchanged. */
    padding-top: calc(14px + env(safe-area-inset-top, 0px));
    padding-left: max(5%, env(safe-area-inset-left, 0px));
    padding-right: max(5%, env(safe-area-inset-right, 0px));
    background: var(--art-card-bg);
    border-bottom: 1px solid var(--art-card-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
}

.nav-brand {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--art-heading);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-brand:hover {
    text-decoration: none;
}

.nav-logo-img {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.back-to-blog {
    color: var(--art-link);
    font-weight: 600;
    font-size: 0.92rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.theme-toggle-btn {
    background: var(--art-hover-bg);
    border: 1px solid var(--art-card-border);
    color: var(--art-text);
    padding: 6px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    border-color: var(--art-primary);
    transform: translateY(-1px);
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    max-width: 860px;
    margin: 20px auto 0;
    padding: 0 20px;
    font-size: 0.88rem;
}

.breadcrumb-list {
    list-style: none;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--art-text-muted);
}

.breadcrumb-list a {
    color: var(--art-link);
    text-decoration: none;
}

.breadcrumb-list a:hover {
    text-decoration: underline;
}

/* Hero Section */
.article-hero {
    background: var(--art-hero-bg);
    padding: 50px 24px 70px;
    text-align: center;
    border-bottom: 1px solid var(--art-card-border);
    position: relative;
}

.article-tag {
    background: var(--art-badge-bg);
    color: var(--art-badge-text);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 18px;
    border: 1px solid var(--art-card-border);
}

.article-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--art-heading);
    line-height: 1.4;
    max-width: 860px;
    margin: 0 auto 20px;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--art-text-muted);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Main Container & Content */
.article-container {
    max-width: 860px;
    margin: -40px auto 60px;
    padding: 40px 36px;
    background: var(--art-card-bg);
    border: 1px solid var(--art-card-border);
    border-radius: 24px;
    box-shadow: var(--art-shadow);
    backdrop-filter: blur(12px);
    position: relative;
    z-index: 10;
}

/* Typography Inside Article */
h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--art-heading);
    margin-top: 44px;
    margin-bottom: 18px;
    padding-right: 14px;
    border-right: 4px solid var(--art-primary);
    line-height: 1.4;
}

h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--art-heading);
    margin-top: 30px;
    margin-bottom: 14px;
    line-height: 1.45;
}

h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--art-heading);
    margin-top: 22px;
    margin-bottom: 10px;
}

p {
    margin-bottom: 20px;
    text-align: justify;
    line-height: 1.9;
    color: var(--art-text);
}

strong {
    color: var(--art-heading);
    font-weight: 700;
}

ul, ol {
    margin-bottom: 24px;
    padding-right: 24px;
    color: var(--art-text);
}

li {
    margin-bottom: 10px;
    line-height: 1.8;
}

/* TL;DR Quick Summary Box */
.tldr-box {
    background: var(--art-box-bg);
    border: 1px solid var(--art-box-border);
    border-right: 4px solid var(--art-primary);
    border-radius: 16px;
    padding: 20px 24px;
    margin: 10px 0 32px;
}

.tldr-title {
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--art-heading);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tldr-box ul {
    margin: 0;
    padding-right: 20px;
}

.tldr-box li {
    margin-bottom: 6px;
    color: var(--art-text);
}

/* Recommended Reading Callout Box (Interlinking) */
.recommended-box {
    background: var(--art-rec-bg);
    border: 1px solid var(--art-rec-border);
    border-right: 4px solid var(--art-rec-border);
    border-radius: 14px;
    padding: 16px 20px;
    margin: 28px 0;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.rec-icon {
    font-size: 1.3rem;
    line-height: 1;
    margin-top: 2px;
}

.rec-body {
    flex: 1;
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--art-text);
}

.rec-title {
    font-weight: 800;
    color: var(--art-rec-title);
    margin-bottom: 4px;
    display: block;
}

.rec-body a {
    font-weight: 700;
    text-decoration: underline;
}

/* Checklist Box */
.checklist-box {
    background: var(--art-checklist-bg);
    border: 1px solid var(--art-checklist-border);
    border-right: 4px solid var(--art-checklist-border);
    border-radius: 16px;
    padding: 24px;
    margin: 32px 0;
}

.checklist-title {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--art-checklist-title);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.checklist-box ul {
    list-style: none;
    padding-right: 0;
    margin: 0;
}

.checklist-box li {
    position: relative;
    padding-right: 28px;
    margin-bottom: 12px;
    color: var(--art-text);
}

.checklist-box li::before {
    content: "✓";
    position: absolute;
    right: 0;
    top: 0;
    font-weight: 900;
    color: var(--art-checklist-border);
}

/* Table of Contents (TOC) */
.toc-box {
    background: var(--art-toc-bg);
    border: 1px solid var(--art-card-border);
    border-radius: 16px;
    padding: 22px 26px;
    margin: 24px 0 36px;
}

.toc-title {
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--art-heading);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 10px;
}

.toc-list li a {
    color: var(--art-link);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.toc-list li a:hover {
    color: var(--art-link-hover);
    text-decoration: underline;
}

/* Data & Comparison Tables */
.data-table-wrapper {
    overflow-x: auto;
    margin: 28px 0;
    border-radius: 14px;
    border: 1px solid var(--art-card-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    text-align: right;
}

.data-table th,
.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--art-card-border);
}

.data-table th {
    background: var(--art-table-header-bg);
    color: var(--art-heading);
    font-weight: 800;
    white-space: nowrap;
}

.data-table tbody tr:nth-child(even) td {
    background: var(--art-table-stripe-bg);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table td strong {
    color: var(--art-heading);
}

/* FAQ Accordion Section */
.faq-section {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--art-card-border);
}

.faq-item {
    background: var(--art-faq-bg);
    border: 1px solid var(--art-card-border);
    border-radius: 14px;
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover {
    border-color: var(--art-primary);
}

.faq-question {
    padding: 18px 22px;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--art-heading);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    background: transparent;
    border: none;
    width: 100%;
    text-align: right;
    font-family: inherit;
}

.faq-icon {
    font-size: 1.3rem;
    color: var(--art-primary);
    transition: transform 0.2s ease;
    font-weight: 900;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 22px 20px 22px;
    display: none;
    color: var(--art-text-muted);
    font-size: 0.98rem;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Call To Action Box */
.cta-box {
    background: linear-gradient(135deg, var(--art-primary) 0%, #4338ca 100%);
    color: #ffffff;
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    margin: 44px 0 20px;
    box-shadow: 0 14px 35px var(--art-primary-glow);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-box h3 {
    color: #ffffff;
    font-size: 1.65rem;
    margin-top: 0;
    margin-bottom: 12px;
}

.cta-box p {
    text-align: center;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 24px;
    font-size: 1.05rem;
}

.cta-btn {
    display: inline-block;
    background: #ffffff;
    color: #0f172a;
    font-weight: 800;
    font-size: 1.05rem;
    padding: 14px 36px;
    border-radius: 12px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-btn:hover {
    transform: scale(1.04);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    color: #000000;
    text-decoration: none;
}

/* Related Articles Section */
.related-articles-section {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--art-card-border);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-top: 18px;
}

.related-card {
    background: var(--art-toc-bg);
    border: 1px solid var(--art-card-border);
    border-radius: 14px;
    padding: 18px 20px;
    text-decoration: none;
    color: var(--art-text);
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.related-card:hover {
    border-color: var(--art-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--art-primary-glow);
    text-decoration: none;
}

.related-card-tag {
    font-size: 0.78rem;
    color: var(--art-primary);
    font-weight: 700;
    margin-bottom: 6px;
}

.related-card-title {
    font-weight: 700;
    color: var(--art-heading);
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 8px;
}

.related-card-desc {
    font-size: 0.85rem;
    color: var(--art-text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Author / E-E-A-T Card */
.author-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--art-toc-bg);
    border: 1px solid var(--art-card-border);
    border-radius: 16px;
    padding: 18px 22px;
    margin: 40px 0 20px;
}

.author-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--art-primary), var(--art-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.author-info {
    flex: 1;
}

.author-name {
    font-weight: 800;
    color: var(--art-heading);
    font-size: 1rem;
    margin-bottom: 4px;
}

.author-role {
    font-size: 0.85rem;
    color: var(--art-text-muted);
}

/* Footer */
.article-footer {
    text-align: center;
    padding: 32px 24px;
    color: var(--art-text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--art-card-border);
    background: var(--art-card-bg);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.footer-nav a {
    color: var(--art-text-muted);
    text-decoration: none;
}

.footer-nav a:hover {
    color: var(--art-link);
}

/* Responsive */
@media (max-width: 768px) {
    .article-container {
        padding: 24px 18px;
        margin: -30px 12px 40px;
        border-radius: 18px;
    }
    /* Grid blowout guard: a single wide descendant (nowrap table cell,
       long token) must never stretch the page past the viewport. */
    .article-layout,
    .article-container,
    .hero-inner {
        min-width: 0;
    }
    .article-layout > * {
        min-width: 0;
    }

/* Small phones: tighter type, full-width actions, compact boxes. */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.45rem;
        line-height: 1.5;
    }
    .hero-lead {
        font-size: 0.95rem;
        text-align: right;
    }
    .hero-actions .btn-hero-primary,
    .hero-actions .btn-hero-ghost {
        flex: 1 1 100%;
        justify-content: center;
        padding: 12px 14px;
        font-size: 0.92rem;
    }
    .article-meta {
        font-size: 0.8rem;
        flex-wrap: wrap;
    }
    .mini-stat {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .article-container h2 {
        font-size: 1.2rem;
        line-height: 1.7;
    }
    .article-container h3 {
        font-size: 1.02rem;
    }
    .article-container p,
    .article-container li {
        font-size: 0.93rem;
    }
    .faq-question {
        padding: 14px 14px;
        font-size: 0.95rem;
    }
    .faq-answer {
        padding: 0 14px 16px 14px;
    }
    .data-table {
        font-size: 0.82rem;
    }
    .data-table th,
    .data-table td {
        padding: 10px 12px;
    }
    .cta-box {
        padding: 26px 18px;
    }
    .cta-box h3 {
        font-size: 1.25rem;
    }
    .toc-box,
    .tldr-box,
    .checklist-box,
    .recommended-box {
        padding: 16px 14px;
    }
    .author-card {
        flex-direction: column;
        text-align: center;
    }
}
    .article-title {
        font-size: 1.65rem;
    }
    h2 {
        font-size: 1.35rem;
        margin-top: 32px;
    }
    h3 {
        font-size: 1.15rem;
    }
    .toc-list {
        grid-template-columns: 1fr;
    }
    .data-table {
        min-width: 520px;
    }
}

/* ==========================================================================
   Unified premium template (hero + KPI + 2-col layout) — standard for all
   keyword pages. Moved here from inline <style> so every page shares it,
   works in both dark & light themes with zero color clashes.
   ========================================================================== */
.article-hero {
    background: radial-gradient(ellipse 900px 500px at 85% -10%, hsla(280,85%,65%,.14), transparent 60%), radial-gradient(ellipse 700px 400px at 10% 0%, hsla(196,100%,70%,.12), transparent 60%), var(--art-hero-bg);
    padding: 56px 20px 84px;
    overflow: hidden;
    position: relative;
}
.hero-inner { max-width: 1120px; margin: 0 auto; position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.35fr .85fr; gap: 24px; align-items: center; }
/* SHIFT GRAPHICS FIX: the hero visual column previously had no box rules,
   so wide hero cards could overflow the grid on narrow screens. */
.hero-visual { min-width: 0; max-width: 100%; }
.hero-visual .hero-card { max-width: 100%; overflow: hidden; }
.theme-icon { display: inline-flex; align-items: center; justify-content: center; line-height: 1; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; border-radius: 999px; font-size: .82rem; font-weight: 800; background: var(--art-badge-bg); color: var(--art-badge-text); border: 1px solid var(--art-card-border); }
.hero-title { font-size: clamp(1.9rem,3.4vw,2.6rem); line-height: 1.28; font-weight: 900; letter-spacing: -.4px; margin: 16px 0 14px; color: var(--art-heading); }
.hero-lead { color: var(--art-text-muted); font-size: 1.04rem; line-height: 1.9; max-width: 62ch; text-align: justify; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.btn-hero-primary { display: inline-flex; align-items: center; gap: 8px; padding: 13px 20px; border-radius: 12px; background: linear-gradient(135deg,#a855f7,#4338ca); color: #fff; font-weight: 800; text-decoration: none; box-shadow: 0 10px 28px rgba(168,85,247,.28); transition: .18s; }
.btn-hero-primary:hover { transform: translateY(-2px); color: #fff; text-decoration: none; }
.btn-hero-ghost { display: inline-flex; align-items: center; gap: 8px; padding: 13px 18px; border-radius: 12px; background: var(--art-card-bg); border: 1px solid var(--art-card-border); color: var(--art-text); font-weight: 700; text-decoration: none; }
.btn-hero-ghost:hover { border-color: var(--art-primary); text-decoration: none; }
.hero-card { background: linear-gradient(145deg, rgba(10,34,51,.88), rgba(6,24,36,.92)); border: 1px solid var(--art-card-border); border-radius: 20px; padding: 18px; box-shadow: var(--art-shadow); backdrop-filter: blur(14px); }
[data-theme="light"] .hero-card { background: #fff; }
.mini-stat { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.mini-stat .stat { padding: 14px; border-radius: 14px; border: 1px solid var(--art-card-border); background: var(--art-toc-bg); text-align: center; }
.mini-stat .stat strong { display: block; font-size: 1.35rem; color: var(--art-heading); }
.mini-stat .stat span { font-size: .82rem; color: var(--art-text-muted); }
.kpi-bar { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; max-width: 1120px; margin: -36px auto 0; padding: 0 20px; position: relative; z-index: 5; }
.kpi { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-radius: 16px; background: var(--art-card-bg); border: 1px solid var(--art-card-border); box-shadow: var(--art-shadow); }
.kpi-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: var(--art-box-bg); border: 1px solid var(--art-box-border); font-size: 20px; flex-shrink: 0; }
.kpi strong { font-size: 1.05rem; color: var(--art-heading); display: block; }
.kpi small { color: var(--art-text-muted); font-size: .82rem; }
.article-layout { display: grid; grid-template-columns: 1fr 300px; gap: 22px; max-width: 1120px; margin: 22px auto 60px; padding: 0 20px; align-items: start; }
.article-layout .article-container { margin: 0; max-width: none; }
.toc-sticky { position: sticky; top: calc(84px + env(safe-area-inset-top, 0px)); }
.toc-sticky .toc-box { margin: 0; }
.section-eyebrow { display: inline-flex; align-items: center; gap: 6px; font-size: .8rem; font-weight: 800; color: var(--art-primary); margin-bottom: 6px; }
.feature-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; margin: 18px 0 8px; }
.feature-card { padding: 18px; border-radius: 16px; border: 1px solid var(--art-card-border); background: var(--art-toc-bg); transition: .18s; }
.feature-card:hover { transform: translateY(-2px); border-color: var(--art-primary); }
.feature-card h4 { margin: 0 0 6px; font-size: 1rem; }
.feature-card p { margin: 0; font-size: .92rem; color: var(--art-text-muted); text-align: justify; line-height: 1.85; }

/* Legacy boxes used by older pages — now properly styled (were missing) */
.key-points-box { background: var(--art-box-bg); border: 1px solid var(--art-box-border); border-right: 4px solid var(--art-primary); border-radius: 16px; padding: 20px 24px; margin: 28px 0; }
.key-points-title { font-weight: 800; font-size: 1.05rem; color: var(--art-heading); margin-bottom: 10px; }
.key-points-box p { margin: 0; color: var(--art-text); text-align: justify; line-height: 1.85; }
.links-box { margin: 32px 0 8px; }
.links-box h3 { font-size: 1.15rem; color: var(--art-heading); margin-bottom: 14px; }
.links-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
.link-card { display: block; padding: 16px; border-radius: 14px; border: 1px solid var(--art-card-border); background: var(--art-toc-bg); text-decoration: none; transition: .18s; }
.link-card:hover { border-color: var(--art-primary); transform: translateY(-2px); text-decoration: none; }
.link-card-title { font-weight: 800; color: var(--art-heading); margin-bottom: 4px; }
.link-card-desc { font-size: .86rem; color: var(--art-text-muted); }

@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; }
    .kpi-bar { grid-template-columns: 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .toc-sticky { position: static; }
    .feature-grid { grid-template-columns: 1fr; }
    .links-grid { grid-template-columns: 1fr; }
}

/* ── A11y appended (F7): skip-link + focus-visible, preserves existing styles ── */
.skip-link{position:absolute;top:-48px;right:16px;z-index:300;background:#fff;color:#000;padding:8px 16px;border-radius:10px;font-weight:800;text-decoration:none;box-shadow:0 8px 24px rgba(0,0,0,.3);transition:top .18s ease;}
.skip-link:focus{top:10px;outline:3px solid var(--art-secondary);outline-offset:2px;}
a:focus-visible,.blog-cat-btn:focus-visible,.post-card:focus-visible,.kw-card:focus-visible,.related-card:focus-visible,.link-card:focus-visible,.faq-question:focus-visible,.theme-toggle-btn:focus-visible,.cta-btn:focus-visible,.btn-hero-primary:focus-visible,.btn-hero-ghost:focus-visible,button:focus-visible{outline:3px solid var(--art-secondary);outline-offset:2px;border-radius:8px;}
.feature-card h3{margin:0 0 6px;font-size:1rem;font-weight:700;color:var(--art-heading);line-height:1.45;}
@media (prefers-reduced-motion:reduce){.skip-link{transition:none;}}