:root {
    --bg: #ffffff;
    --bg-soft: #f8fafc;
    --surface: #ffffff;
    --surface-alt: #f4f7fb;
    --text: #111111;
    --muted: #6b7280;
    --border: #e5e7eb;
    --accent: #2563eb;
    --accent-strong: #1d4ed8;
    --teal: #0f766e;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 18px 48px rgba(15, 23, 42, 0.06);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --content-width: 760px;
    --page-width: 1200px;
}

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

[x-cloak] {
    display: none !important;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.1), transparent 32%),
        radial-gradient(circle at 86% 8%, rgba(46, 196, 182, 0.08), transparent 20%),
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

img,
svg {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

.container {
    width: min(var(--page-width), calc(100% - 32px));
    margin: 0 auto;
}

.narrow {
    width: min(var(--content-width), calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(14px);
    background: rgba(255, 255, 255, 0.86);
    border-bottom: 1px solid rgba(229, 231, 235, 0.9);
}

.site-header__inner,
.site-footer__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 16px 0;
}

.site-brand {
    display: inline-flex;
    align-items: center;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 600;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--text);
    background: rgba(37, 99, 235, 0.08);
}

.site-main {
    min-height: calc(100vh - 180px);
}

.section {
    padding: 72px 0;
}

.anchored-section {
    scroll-margin-top: 108px;
}

.section--tight {
    padding: 40px 0;
}

.hero {
    padding: 88px 0 56px;
}

.hero__panel {
    display: grid;
    gap: 24px;
    padding: 36px;
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: var(--shadow);
}

.hero__eyebrow,
.eyebrow {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--accent);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hero__title,
.section-title {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 4.2rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.hero__description,
.section-intro,
.muted {
    color: var(--muted);
}

.hero__description {
    max-width: 720px;
    margin: 0;
    font-size: 1.05rem;
}

.hero__actions,
.button-row,
.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button,
.button-secondary,
.button-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 18px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-weight: 700;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.button {
    color: #fff;
    background: var(--text);
}

.button:hover {
    transform: translateY(-1px);
    background: #000;
}

.button-secondary {
    color: #fff;
    background: var(--accent);
}

.button-secondary:hover {
    transform: translateY(-1px);
    background: var(--accent-strong);
}

.button-ghost {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.92);
}

.button-ghost:hover {
    transform: translateY(-1px);
    border-color: rgba(37, 99, 235, 0.35);
}

.grid {
    display: grid;
    gap: 24px;
}

.grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.banner,
.notice,
.library-table,
.quiz-panel,
.comparison-highlight {
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
}

.card {
    padding: 24px;
}

.card__title,
.entry-title {
    margin: 0 0 10px;
    font-size: 1.15rem;
    line-height: 1.25;
}

.card__meta,
.entry-meta,
.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted);
    font-size: 0.9rem;
}

.pill,
.meta-pill {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--surface-alt);
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 700;
}

.banner {
    padding: 28px;
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.14), transparent 26%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
}

.banner--accent {
    border-color: rgba(37, 99, 235, 0.2);
}

.stack {
    display: grid;
    gap: 16px;
}

.stack--compact {
    gap: 8px;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
    gap: 28px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.info-card {
    padding: 18px;
    border-radius: 14px;
    background: var(--surface-alt);
}

.info-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.84rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--muted);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.guide-grid > .card {
    height: 100%;
}

.framework-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    gap: 28px;
    padding: 30px;
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: 28px;
    background:
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.08), transparent 30%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.94));
    box-shadow: var(--shadow);
}

.framework-panel__lead {
    display: grid;
    align-content: space-between;
    gap: 28px;
    min-height: 100%;
    padding: 34px;
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: 24px;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
}

.framework-notes {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.framework-note {
    display: grid;
    gap: 6px;
    padding: 16px;
    border: 1px solid rgba(229, 231, 235, 0.92);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
    color: #4b5563;
    font-size: 0.94rem;
}

.framework-note__value {
    color: var(--accent);
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.framework-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.feature-card {
    position: relative;
    display: grid;
    align-content: start;
    gap: 14px;
    min-height: 210px;
    padding: 24px;
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
    overflow: hidden;
}

.feature-card--link {
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.feature-card--link:hover,
.feature-card--link:focus-visible {
    transform: translateY(-3px);
    border-color: rgba(37, 99, 235, 0.32);
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.1);
}

.feature-card--link:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.16);
    outline-offset: 4px;
}

.feature-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 4px;
    background: var(--accent);
}

.feature-card--blue {
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.1), transparent 38%),
        rgba(255, 255, 255, 0.96);
}

.feature-card--teal {
    background:
        radial-gradient(circle at top left, rgba(46, 196, 182, 0.12), transparent 38%),
        rgba(255, 255, 255, 0.96);
}

.feature-card--teal::before {
    background: #2ec4b6;
}

.feature-card--ink {
    background:
        radial-gradient(circle at top left, rgba(17, 17, 17, 0.05), transparent 38%),
        rgba(255, 255, 255, 0.96);
}

.feature-card--ink::before {
    background: #111111;
}

.feature-card--soft {
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.09), transparent 38%),
        rgba(255, 255, 255, 0.96);
}

.feature-card--soft::before {
    background: #0f766e;
}

.feature-card__label {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(244, 247, 251, 0.9);
    color: #5b6474;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.feature-card__title {
    margin: 0;
    font-size: 1.3rem;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.feature-card__body {
    margin: 0;
    color: #4b5563;
    font-size: 0.98rem;
}

.feature-card__cta {
    margin-top: auto;
    color: var(--accent);
    font-size: 0.92rem;
    font-weight: 800;
}

.prose {
    max-width: var(--content-width);
}

.prose--wide {
    max-width: none;
}

.prose h2,
.prose h3 {
    margin: 32px 0 12px;
    font-size: clamp(1.3rem, 2vw, 1.8rem);
    line-height: 1.2;
}

.prose p,
.prose li {
    color: #374151;
    font-size: 1rem;
}

.prose a {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

.prose ul,
.prose ol {
    padding-left: 20px;
}

.prose li + li {
    margin-top: 8px;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
}

.article-sidebar {
    position: sticky;
    top: 96px;
    align-self: start;
}

.library-table,
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

thead th {
    background: var(--surface-alt);
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    min-width: 160px;
}

.filter-bar,
.form-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.field {
    display: grid;
    gap: 8px;
}

.field label {
    font-size: 0.92rem;
    font-weight: 700;
}

.input,
.select,
.textarea {
    width: 100%;
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
}

.textarea {
    min-height: 120px;
    padding: 14px;
}

.input:focus,
.select:focus,
.textarea:focus {
    outline: 3px solid rgba(37, 99, 235, 0.12);
    border-color: rgba(37, 99, 235, 0.5);
}

.quiz-panel {
    padding: 28px;
}

.builder-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.9fr);
    gap: 24px;
}

.progress {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.progress__step {
    padding: 10px 12px;
    border-radius: 12px;
    background: var(--surface-alt);
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 700;
}

.progress__step.is-active,
.progress__step.is-complete {
    color: var(--text);
    background: rgba(37, 99, 235, 0.12);
}

.quiz-options {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.quiz-option {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    text-align: left;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.quiz-option:hover,
.quiz-option.is-active {
    border-color: rgba(37, 99, 235, 0.45);
    background: rgba(37, 99, 235, 0.05);
    transform: translateY(-1px);
}

.quiz-option small {
    display: block;
    color: var(--muted);
}

.notice,
.status-banner {
    padding: 16px 18px;
}

.notice--soft {
    background: rgba(248, 250, 252, 0.94);
}

.notice--success {
    border-color: rgba(15, 118, 110, 0.25);
    background: rgba(15, 118, 110, 0.08);
}

.sidebar-card {
    padding: 22px;
}

.list-clean {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.faq-card {
    display: grid;
    gap: 10px;
    padding: 24px;
    border: 1px solid rgba(229, 231, 235, 0.95);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
}

.faq-card h3 {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.3;
}

.faq-card p {
    margin: 0;
    color: #4b5563;
}

.site-footer {
    padding: 48px 0 36px;
    border-top: 1px solid rgba(229, 231, 235, 0.95);
    background: rgba(255, 255, 255, 0.8);
}

.pagination-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 8px;
}

.pagination-summary {
    color: var(--muted);
    font-size: 0.95rem;
}

.pagination-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.pagination-link,
.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    font-size: 0.95rem;
    font-weight: 700;
}

.pagination-link {
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.pagination-link:hover {
    transform: translateY(-1px);
    border-color: rgba(37, 99, 235, 0.35);
    background: rgba(37, 99, 235, 0.05);
}

.pagination-link.is-active {
    border-color: transparent;
    background: var(--accent);
    color: #fff;
}

.pagination-link.is-disabled {
    color: var(--muted);
    background: var(--surface-alt);
    cursor: not-allowed;
}

.pagination-ellipsis {
    color: var(--muted);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr));
    gap: 24px;
    padding: 24px 0;
}

.footer-links {
    display: grid;
    gap: 10px;
}

.footer-disclaimer {
    margin-top: 22px;
    padding-top: 22px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.94rem;
}

.empty-state {
    padding: 28px;
    text-align: center;
}

@media (max-width: 1024px) {
    .grid--4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid--3,
    .info-grid,
    .split,
    .article-layout,
    .builder-grid,
    .faq-grid,
    .site-footer__grid {
        grid-template-columns: 1fr;
    }

    .framework-panel {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
    }
}

@media (max-width: 720px) {
    .site-header__inner,
    .site-footer__top,
    .hero__actions,
    .button-row,
    .inline-actions,
    .meta-row {
        flex-direction: column;
        align-items: stretch;
    }

    .grid--2,
    .grid--4,
    .filter-bar,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 64px;
    }

    .hero__panel,
    .card,
    .banner,
    .quiz-panel {
        padding: 22px;
    }

    .framework-panel,
    .framework-panel__lead {
        padding: 22px;
    }

    .framework-grid,
    .framework-notes {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: 0;
    }
}