:root {
    --color-primary: #1d4ed8;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #dbeafe;
    --color-accent: #0284c7;
    --color-accent-soft: #e0f2fe;
    --color-bg: #ffffff;
    --color-bg-alt: #f0f7ff;
    --color-surface: #f8fafc;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-border: #cbd5e1;
    --color-border-light: #e2e8f0;
    --color-success: #047857;
    --color-success-bg: #ecfdf5;
    --color-warning-bg: #eff6ff;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 20px rgba(29, 78, 216, 0.08);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.10);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --max-width: 1220px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

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

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

a:hover,
a:focus-visible {
    color: var(--color-primary-dark);
}

.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--color-primary-dark);
    color: #ffffff;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    z-index: 9999;
    font-weight: 600;
}

.skip-link:focus {
    top: 12px;
    color: #ffffff;
}

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

/* Top Bar */
.top-bar {
    background-color: var(--color-primary-dark);
    color: #e2e8f0;
    font-size: 0.85rem;
    padding: 8px 0;
}

.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.top-bar-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.top-badge {
    background-color: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    padding: 2px 10px;
    border-radius: 99px;
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.02em;
}

.top-bar-contact {
    display: flex;
    align-items: center;
    gap: 10px;
}

.top-link {
    color: #f8fafc;
    font-weight: 500;
}

.top-link:hover {
    color: var(--color-primary-light);
}

.top-sep {
    opacity: 0.4;
}

/* Header & Navigation */
.site-header {
    background-color: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 78px;
    gap: 20px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text);
}

.brand-mark {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
    color: #ffffff;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.28rem;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 0.76rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 6px;
}

.nav-link {
    display: inline-block;
    padding: 8px 14px;
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
}

.nav-link.active {
    font-weight: 600;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle-bar {
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.98rem;
    padding: 13px 24px;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.btn-sm {
    padding: 9px 18px;
    font-size: 0.88rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
    background-color: var(--color-primary-dark);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(--color-accent);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: var(--color-primary-dark);
    color: #ffffff;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary-dark);
}

.btn-ghost {
    background-color: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-ghost:hover {
    background-color: var(--color-border-light);
}

/* Typography & Sections */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    color: var(--color-text);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 3.8vw, 3rem);
    font-weight: 800;
    margin-bottom: 20px;
}

h2 {
    font-size: clamp(1.55rem, 2.6vw, 2.2rem);
    font-weight: 700;
    margin-bottom: 16px;
}

h3 {
    font-size: 1.28rem;
    font-weight: 700;
    margin-bottom: 12px;
}

p {
    margin-bottom: 16px;
    color: var(--color-text-muted);
}

.section {
    padding: 76px 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section-header {
    max-width: 780px;
    margin-bottom: 44px;
}

.eyebrow {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    background-color: var(--color-accent-soft);
    padding: 5px 12px;
    border-radius: 99px;
    margin-bottom: 14px;
}

/* Hero Section */
.hero {
    padding: 64px 0 76px;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border-light);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-lead {
    font-size: 1.14rem;
    color: var(--color-text-muted);
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 32px;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border-light);
}

.highlight-item strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.15rem;
    color: var(--color-primary-dark);
}

.highlight-item span {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.hero-media {
    position: relative;
}

.media-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border-light);
    background-color: var(--color-surface);
}

.media-caption {
    padding: 14px 20px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    background-color: #ffffff;
    border-top: 1px solid var(--color-border-light);
}

/* Cards & Grids */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.card {
    background-color: #ffffff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-primary);
    background-color: var(--color-primary-light);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
}

/* Editorial Content Layout */
.article-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 44px;
    align-items: start;
}

.toc-sidebar {
    position: sticky;
    top: 100px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 24px;
}

.toc-title {
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-dark);
    margin-bottom: 14px;
}

.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toc-list a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
    display: block;
    line-height: 1.4;
}

.toc-list a:hover {
    color: var(--color-primary);
}

.prose h2 {
    margin-top: 40px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-bg-alt);
}

.prose h2:first-child {
    margin-top: 0;
}

.prose h3 {
    margin-top: 28px;
    margin-bottom: 12px;
    color: var(--color-primary-dark);
}

.prose ul,
.prose ol {
    margin: 0 0 22px 22px;
    color: var(--color-text-muted);
}

.prose li {
    margin-bottom: 10px;
}

.prose strong {
    color: var(--color-text);
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    margin: 28px 0;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    background-color: #ffffff;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.94rem;
}

.data-table th {
    background-color: var(--color-primary-dark);
    color: #ffffff;
    font-weight: 600;
    padding: 14px 18px;
}

.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-muted);
    vertical-align: top;
}

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

.data-table tr:nth-child(even) td {
    background-color: var(--color-surface);
}

/* Callout & Checklist Boxes */
.info-callout {
    background-color: var(--color-warning-bg);
    border-left: 4px solid var(--color-primary);
    padding: 22px 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 28px 0;
}

.info-callout h3,
.info-callout h4 {
    color: var(--color-primary-dark);
    margin-bottom: 8px;
    margin-top: 0;
}

.checklist-box {
    background-color: var(--color-success-bg);
    border: 1px solid #a7f3d0;
    border-radius: var(--radius-md);
    padding: 26px;
    margin: 28px 0;
}

.checklist-box h3 {
    color: var(--color-success);
    margin-top: 0;
}

.check-list {
    list-style: none;
    margin-left: 0;
}

.check-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-success);
    font-weight: 800;
}

/* Author / Reviewer Box */
.author-box {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-top: 44px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--color-primary-dark);
    color: #ffffff;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.author-meta h4 {
    margin-bottom: 4px;
    font-size: 1.05rem;
}

.author-role {
    font-size: 0.86rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.author-bio {
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* FAQ Accordion */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 880px;
}

.faq-item {
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    background-color: #ffffff;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 20px 24px;
    font-family: var(--font-display);
    font-size: 1.06rem;
    font-weight: 700;
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

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

.faq-icon {
    font-size: 1.3rem;
    color: var(--color-primary);
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border-light);
    padding-top: 16px;
}

/* Contact Form */
.form-card {
    background-color: #ffffff;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 8px;
    color: var(--color-text);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 0.96rem;
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: #ffffff;
}

textarea.form-control {
    min-height: 130px;
    resize: vertical;
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--color-text-muted);
}

.form-check input {
    margin-top: 4px;
}

.hp-field {
    position: absolute;
    left: -9999px;
    opacity: 0;
    pointer-events: none;
}

.alert-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

/* CTA Banner */
.cta-banner {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: 48px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.cta-banner h2,
.cta-banner p {
    color: #ffffff;
}

.cta-banner p {
    opacity: 0.9;
    margin-bottom: 0;
    max-width: 640px;
}

.btn-white {
    background-color: #ffffff;
    color: var(--color-primary-dark);
}

.btn-white:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary-dark);
}

/* Footer */
.site-footer {
    background-color: #0b1528;
    color: #cbd5e1;
    padding: 64px 0 36px;
    margin-top: 60px;
}

.footer-disclaimer-box {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 22px 26px;
    margin-bottom: 48px;
}

.disclaimer-title {
    color: #ffffff;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 6px;
}

.disclaimer-text {
    color: #94a3b8;
    font-size: 0.86rem;
    margin-bottom: 0;
    line-height: 1.6;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 36px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo .brand-title {
    color: #ffffff;
}

.footer-desc {
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-legal-id {
    color: #cbd5e1;
    font-size: 0.85rem;
    margin-bottom: 0;
}

.footer-heading {
    color: #ffffff;
    font-size: 1rem;
    margin-bottom: 18px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a,
.footer-address a {
    color: #94a3b8;
    font-size: 0.9rem;
}

.footer-links a:hover,
.footer-address a:hover {
    color: #ffffff;
}

.footer-cookie-btn {
    background: none;
    border: none;
    color: #94a3b8;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

.footer-cookie-btn:hover {
    color: #ffffff;
}

.footer-address {
    font-style: normal;
}

.footer-address p {
    color: #94a3b8;
    font-size: 0.88rem;
    margin-bottom: 10px;
}

.footer-bottom {
    padding-top: 28px;
    text-align: center;
}

.footer-bottom p {
    color: #64748b;
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    max-width: 980px;
    margin: 0 auto;
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    padding: 24px 28px;
}

.cookie-banner-inner {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.cookie-banner-title {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.cookie-banner-text p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

.cookie-preferences {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.cookie-switch-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--color-text);
    cursor: pointer;
}

.cookie-banner-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-grid,
    .article-layout,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .toc-sidebar {
        position: static;
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .primary-nav {
        display: none;
        position: absolute;
        top: 78px;
        left: 0;
        right: 0;
        background-color: #ffffff;
        border-bottom: 1px solid var(--color-border);
        padding: 20px 24px;
        flex-direction: column;
        align-items: stretch;
        box-shadow: var(--shadow-md);
    }

    .primary-nav.is-open {
        display: flex;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
    }

    .grid-2,
    .grid-3,
    .grid-4,
    .hero-highlights {
        grid-template-columns: 1fr;
    }

    .cta-banner {
        padding: 32px 24px;
    }
}