/* ============================================================
   Нейросовместимость — Stripe-inspired adapted design
   Tokens → Base → Components → Pages → Media Queries
   ============================================================ */

:root {
    /* ── Indigo: primary CTA system ── */
    --c-primary:            #533afd;
    --c-primary-deep:       #4434d4;
    --c-primary-press:      #2e2b8c;
    --c-primary-soft:       #b9b9f9;
    --c-primary-gradient:   linear-gradient(90deg, var(--c-primary), var(--c-primary-deep));

    /* ── Ink: text ── */
    --c-ink:            #0d253d;
    --c-ink-secondary:  #273951;
    --c-ink-mute:       #64748d;
    --c-on-primary:     #ffffff;

    /* ── Canvas: surfaces ── */
    --c-canvas:          #ffffff;
    --c-canvas-soft:     #f6f9fc;
    --c-canvas-gradient: linear-gradient(40deg,rgba(246, 249, 252, 1) 31%, rgba(237, 237, 237, 1) 100%);
    --c-canvas-cream:    #f5e9d4;
    --c-hairline:        #e3e8ee;
    --c-hairline-input:  #a8c3de;

    /* ── Dark surfaces ── */
    --c-brand-dark-900: #1c1e54;

    /* ── Mesh stops (adapted warm) ── */
    --mesh-cream:       #f5e9d4;
    --mesh-sherbet:     #f4cdb6;
    --mesh-lavender:    #c8b4f5;
    --mesh-indigo:      #7d5a9e;
    --mesh-blush:       #b07a8f;

    /* ── Spacing ── */
    --sp-xxs: 2px;
    --sp-xs:  4px;
    --sp-sm:  8px;
    --sp-md:  12px;
    --sp-lg:  16px;
    --sp-xl:  24px;
    --sp-xxl: 32px;
    --sp-huge: 64px;

    /* ── Radius ── */
    --r-xs:   4px;
    --r-sm:   6px;
    --r-md:   8px;
    --r-lg:   12px;
    --r-xl:   16px;
    --r-pill: 9999px;

    /* ── Shadow ── */
    --shadow-1: 0 1px 3px rgba(0, 55, 112, 0.08);
    --shadow-2: 0 8px 24px rgba(0, 55, 112, 0.08), 0 2px 6px rgba(0, 55, 112, 0.04);

    /* ── Typography ── */
    --font-sans: "PT Serif", Georgia, "Times New Roman", serif;
    --max-width: 1200px;
    --max-width-article: 760px;
}

/* ============================================================
   Base
   ============================================================ */

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    color: var(--c-ink);
    background: var(--c-canvas);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
    margin: 0 0 var(--sp-md);
    font-weight: 700;
    color: var(--c-ink);
    line-height: 1.15;
}
h1 {
    font-size: clamp(2.25rem, 4.5vw, 4rem);     /* 36 → 64 */
    letter-spacing: -1px;
    line-height: 1.05;
}
h2 {
    font-size: clamp(1.75rem, 3.2vw, 2.5rem);   /* 28 → 40 */
    letter-spacing: -0.5px;
    margin-top: var(--sp-huge);
}
h3 {
    font-size: clamp(1.25rem, 2.2vw, 1.625rem); /* 20 → 26 */
    letter-spacing: -0.18px;
    color: var(--c-ink);
    margin-top: var(--sp-xxl);
}
h4 {
    font-size: 1.25rem;
    letter-spacing: -0.15px;
}

p { margin: 0 0 var(--sp-lg); }

a {
    color: var(--c-primary);
    text-decoration: none;
    transition: color .15s;
}
a:hover { color: var(--c-primary-deep); text-decoration: underline; }

code {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    background: var(--c-canvas-soft);
    padding: 2px 6px;
    border-radius: var(--r-xs);
    font-size: 0.9em;
    color: var(--c-ink);
}

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

main { padding-bottom: var(--sp-huge); }

/* ============================================================
   Buttons
   ============================================================ */

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-xs);
    padding: var(--sp-sm) var(--sp-lg);
    border-radius: var(--r-pill);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 16px;
    font-weight: 500;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    min-height: 44px;
    transition: background .15s, color .15s, border-color .15s, transform .1s;
}
.btn-primary {
    background: var(--c-primary);
    color: var(--c-on-primary);
}
.btn-primary:hover {
    background: var(--c-primary-deep);
    color: var(--c-on-primary);
    text-decoration: none;
    transform: translateY(-1px);
}
.btn-primary:active { background: var(--c-primary-press); }

.btn-secondary {
    background: var(--c-canvas);
    color: var(--c-primary);
    border-color: var(--c-primary);
}
.btn-secondary:hover {
    background: var(--c-primary-soft);
    color: var(--c-primary-deep);
    text-decoration: none;
}

/* ============================================================
   Pills & tags
   ============================================================ */

.pill-tag-soft {
    display: inline-flex;
    align-items: center;
    padding: var(--sp-xs) var(--sp-sm);
    background: var(--c-primary-gradient);
    color: #FFFFFF;
    border-radius: var(--r-pill);
    font-family: sans-serif, Arial;
    font-size: 0.7rem;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: 0.1px;
    text-transform: uppercase;
    font-feature-settings: "tnum" 1;
}

/* ============================================================
   Cards
   ============================================================ */

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--sp-lg);
}

/* ============================================================
   Mesh
   ============================================================ */

.mesh {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}
.mesh-host {
    position: relative;
    overflow: hidden;
    background: var(--c-canvas);
}
.mesh-host--hero { min-height: 360px; }
.mesh-host--pair { background: var(--c-canvas-soft); }
.mesh-host__content {
    position: relative;
    z-index: 1;
}

/* ============================================================
   Score displays
   ============================================================ */

.score-badge {
    display: inline-flex;
    align-items: baseline;
    gap: var(--sp-md);
    margin: var(--sp-lg) 0 var(--sp-sm);
    padding: var(--sp-md) var(--sp-xl);
    background: var(--c-canvas);
    border: 1px solid var(--c-hairline);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-1);
    font-feature-settings: "tnum" 1;
}
.score-badge__value {
    font-size: 1.625rem;
    font-weight: 300;
    letter-spacing: -0.4px;
    color: var(--c-ink);
    line-height: 1;
}
.score-badge__label {
    font-size: 13px;
    font-weight: 400;
    color: var(--c-ink-mute);
    letter-spacing: -0.39px;
}

.criterion-score {
    margin: var(--sp-xxl) 0 var(--sp-sm);
}
.criterion-score__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--sp-md);
    margin-bottom: var(--sp-sm);
}
.criterion-score__name {
    margin: 0;
    font-weight: 700;
    color: var(--c-ink);
    line-height: 1.2;
}
.criterion-score__value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--c-ink);
    font-feature-settings: "tnum" 1;
    white-space: nowrap;
}
.criterion-score__bar {
    height: 10px;
    background: var(--c-canvas-cream);
    border-radius: var(--r-pill);
    overflow: hidden;
}
.criterion-score__fill {
    height: 100%;
    background: var(--c-primary-gradient);
    border-radius: var(--r-pill);
    transition: width .3s ease-out;
}

/* ============================================================
   Pair dashboard card (hero on pair pages)
   ============================================================ */

.dashboard-card {
    margin: var(--sp-xl) 0;
    background: var(--c-canvas);
    border: 1px solid var(--c-hairline);
    border-radius: var(--r-lg);
    padding: var(--sp-xxl);
    box-shadow: var(--shadow-2);
}
.dashboard-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-lg);
    padding-bottom: var(--sp-lg);
    border-bottom: 1px solid var(--c-hairline);
    margin-bottom: var(--sp-lg);
    flex-wrap: wrap;
}
.dashboard-card__score {
    display: inline-flex;
    align-items: baseline;
    gap: var(--sp-md);
}
.dashboard-card__score-value {
    font-size: 2.75rem;
    font-weight: 700;
    letter-spacing: -0.4px;
    color: var(--c-ink);
    line-height: 1;
    font-feature-settings: "tnum" 1;
}
.dashboard-card__score-label {
    font-size: 13px;
    color: var(--c-ink-mute);
    letter-spacing: -0.39px;
}
.dashboard-card__criteria {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-lg) var(--sp-xl);
}
.dashboard-card__criterion {
    font-feature-settings: "tnum" 1;
}
.dashboard-card__criterion-head {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    margin-bottom: var(--sp-xs);
}
.dashboard-card__criterion-name { color: var(--c-ink-secondary); }
.dashboard-card__criterion-value { color: var(--c-ink); font-weight: 700; }
.dashboard-card__criterion-bar {
    height: 10px;
    background: var(--c-canvas-cream);
    border-radius: var(--r-pill);
    overflow: hidden;
}
.dashboard-card__criterion-fill {
    height: 100%;
    background: var(--c-primary-gradient);
    border-radius: var(--r-pill);
}

/* ============================================================
   Tips lists (strengths, weaknesses, advice)
   ============================================================ */

.tips-list {
    padding-left: 1.3em;
    margin: 0 0 var(--sp-lg);
}
.tips-list li {
    margin-bottom: var(--sp-sm);
    color: var(--c-ink-secondary);
}
.tips-list li::marker { color: var(--c-primary); }
.tips-list--good li::marker { color: var(--c-primary); }
.tips-list--warn li::marker { color: var(--mesh-blush); }

/* ============================================================
   FAQ
   ============================================================ */

.faq-item {
    background: var(--c-canvas);
    border: 1px solid var(--c-hairline);
    border-radius: var(--r-md);
    padding: var(--sp-md) var(--sp-lg);
    margin-bottom: var(--sp-sm);
    transition: border-color .15s;
}
.faq-item[open] { border-color: var(--c-primary-soft); }
.faq-item summary {
    cursor: pointer;
    font-weight: 400;
    color: var(--c-ink);
    font-size: 18px;
    letter-spacing: -0.2px;
    list-style: none;
    position: relative;
    padding-right: var(--sp-xl);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    font-weight: 300;
    color: var(--c-primary);
    transition: transform .2s;
}
.faq-item[open] summary::after { content: "−"; transform: translateY(-50%); }
.faq-item p { margin-top: var(--sp-md); color: var(--c-ink-secondary); }

/* ============================================================
   Related list
   ============================================================ */

.related-list {
    list-style: none;
    margin: 0;
    padding: 0;
    columns: 2;
    column-gap: var(--sp-xl);
}
.related-list li {
    margin: 0;
    padding: var(--sp-sm) 0;
    border-bottom: 1px solid var(--c-hairline);
    break-inside: avoid;
}
.related-list a { color: var(--c-ink-secondary); }
.related-list a:hover { color: var(--c-primary); }

/* ============================================================
   Breadcrumbs
   ============================================================ */

.breadcrumbs {
    margin: 0 0 var(--sp-xl);
    padding-top: 1rem;
}
.breadcrumbs ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.breadcrumbs li {
    display: inline-flex;
    align-items: center;
    background: var(--c-canvas-soft);
    border-radius: var(--r-pill);
    padding: 6px 12px;
    line-height: 1.2;
    color: var(--c-ink-secondary);
}
.breadcrumbs li[aria-current="page"] {
    background: var(--c-primary);
    color: var(--c-on-primary);
}
.breadcrumbs li:not([aria-current="page"]) + li:not([aria-current="page"])::before {
    content: "›";
    margin-right: 6px;
    color: var(--c-hairline-input);
    font-size: 14px;
    background: transparent;
    padding: 0;
}
.breadcrumbs a {
    color: var(--c-ink-secondary);
    text-decoration: none;
}
.breadcrumbs li:not([aria-current="page"]):hover {
    background: var(--c-primary-soft);
}
.breadcrumbs li:not([aria-current="page"]):hover a {
    color: var(--c-primary-deep);
}

/* ============================================================
   Category grid (home & hubs)
   ============================================================ */

.category-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--sp-lg);
}
.category-grid__item a {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--sp-md);
    min-height: 200px;
    padding: var(--sp-xl);
    background: var(--c-canvas);
    border: 1px solid var(--c-hairline);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-1);
    color: var(--c-ink);
    font-weight: 400;
    transition: transform .15s, box-shadow .15s, border-color .15s;
}
.category-grid__item a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
    border-color: var(--c-primary-soft);
    text-decoration: none;
    color: var(--c-ink);
}
.category-grid__name {
    font-size: 24px;
    letter-spacing: -0.2px;
    line-height: 1.2;
}
.category-grid__count {
    font-size: 14px;
    color: var(--c-ink-mute);
    font-weight: 400;
}
.category-grid__item a::after {
    content: "→";
    align-self: flex-end;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--c-primary);
    font-size: 18px;
    line-height: 1;
}

/* ============================================================
   Entity grid (alphabetical list)
   ============================================================ */

.entity-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--sp-xs);
}
.entity-grid a {
    display: block;
    padding: var(--sp-sm) var(--sp-lg);
    background: var(--c-canvas-gradient);
    color: var(--c-ink);
    border-radius: var(--r-pill);
    border: 1px solid #EDEDED;
    font-size: 15px;
    transition: background .15s, color .15s;
}
.entity-grid a:hover {
    background: var(--c-primary);
    color: var(--c-on-primary);
    text-decoration: none;
}

/* ============================================================
   Trait chips (entity hub)
   ============================================================ */

.trait-chips {
    list-style: none;
    margin: var(--sp-md) 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-xs);
}
.trait-chips li {
    font-size: 14px;
    font-weight: 300;
    color: var(--c-primary-deep);
    background: var(--c-primary-soft);
    padding: var(--sp-xs) var(--sp-md);
    border-radius: var(--r-pill);
}

/* ============================================================
   Pair card (used in card grids)
   ============================================================ */

.card {
    position: relative;
    display: block;
    text-decoration: none;
    background: var(--c-canvas);
    border: 1px solid var(--c-hairline);
    border-radius: var(--r-lg);
    padding: var(--sp-xxl);
    box-shadow: var(--shadow-1);
    transition: transform .15s, box-shadow .15s, border-color .15s;
    color: var(--c-ink);
}
.card:hover,
.card:focus-visible {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
    border-color: var(--c-primary-soft);
    text-decoration: none;
    color: var(--c-ink);
    outline: none;
}
.card:focus-visible {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-soft);
}
.card__title {
    margin: 0 0 var(--sp-xs);
    padding-right: 72px;
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.2px;
    color: var(--c-ink);
    line-height: 1.3;
}
.card:hover .card__title { color: var(--c-primary); }
.card__lead {
    margin: 0 0 var(--sp-md);
    color: var(--c-ink-secondary);
    font-size: 15px;
    line-height: 1.6;
}
.card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-xs);
    font-size: 14px;
    font-weight: 400;
    color: var(--c-primary);
}
.card__score {
    position: absolute;
    top: var(--sp-md);
    right: var(--sp-lg);
    color: var(--c-primary);
    font-size: 28px;
    font-weight: 700;
    line-height: 1;
    font-feature-settings: "tnum" 1;
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background .2s, border-color .2s, backdrop-filter .2s;
}
.site-header--scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: var(--c-hairline);
}
.site-header__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-sm) var(--sp-lg);
    min-height: 64px;
    padding: var(--sp-sm) 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-sm);
    font-size: 18px;
    font-weight: 400;
    letter-spacing: -0.2px;
    color: var(--c-ink);
}
.brand:hover { color: var(--c-primary); text-decoration: none; }
.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-xs);
}
.main-nav a {
    padding: var(--sp-sm) var(--sp-md);
    color: var(--c-ink-secondary);
    font-size: 15px;
    font-weight: 300;
    border-radius: var(--r-pill);
    transition: color .15s, background .15s;
}
.main-nav a:hover {
    color: var(--c-primary);
    background: var(--c-canvas-soft);
    text-decoration: none;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
    background: var(--c-brand-dark-900);
    color: rgba(255, 255, 255, 0.85);
    padding: var(--sp-huge) 0 var(--sp-xxl);
    margin-top: var(--sp-huge);
}
.site-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-xxl);
}
.site-footer h4 {
    color: var(--c-on-primary);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0.1px;
    text-transform: uppercase;
    margin: 0 0 var(--sp-md);
}
.site-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.site-footer li { margin-bottom: var(--sp-xs); }
.site-footer a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 13px;
    letter-spacing: -0.39px;
}
.site-footer a:hover { color: var(--c-on-primary); text-decoration: none; }
.site-footer__brand {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: -0.2px;
    color: var(--c-on-primary);
    margin-bottom: var(--sp-sm);
}
.site-footer__tagline {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    margin: 0;
}
.site-footer__legal {
    grid-column: 1 / -1;
    padding-top: var(--sp-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-feature-settings: "tnum" 1;
}

/* ============================================================
   Hero & sections
   ============================================================ */

.hero {
    padding: var(--sp-huge) 0 var(--sp-xxl);
    text-align: left;
}
.hero__lead {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    color: var(--c-ink-secondary);
    max-width: 640px;
    margin: var(--sp-md) 0 var(--sp-xl);
    line-height: 1.6;
}

.section { margin: var(--sp-xxl) 0; }
.section.empty { color: var(--c-ink-mute); }
.lead {
    font-size: clamp(1.05rem, 1.5vw, 1.25rem);
    color: var(--c-ink-secondary);
    line-height: 1.6;
}

/* ============================================================
   Article (pair page body)
   ============================================================ */

.article {
    max-width: var(--max-width-article);
    margin: 0 auto;
}
.article__header h1 { margin-bottom: var(--sp-md); }
.pair-hero-header {
    padding: var(--sp-xxl) 0;
}
.article__figure { margin: var(--sp-lg) 0; }
.article__figure img {
    width: 100%;
    height: auto;
    border-radius: var(--r-lg);
    border: 1px solid var(--c-hairline);
}
.article .section p,
.article .section ul { color: var(--c-ink-secondary); }
.article .section p { line-height: 1.75; }

/* ============================================================
   Static pages + 404
   ============================================================ */

.static-page {
    max-width: var(--max-width-article);
    margin: 0 auto;
    padding: var(--sp-xxl) 0;
}
.static-page h1 { margin-bottom: var(--sp-lg); }
.static-page p { color: var(--c-ink-secondary); line-height: 1.7; }

.not-found {
    max-width: var(--max-width-article);
    margin: 0 auto;
    text-align: center;
    padding: var(--sp-huge) 0;
}
.not-found h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    margin-bottom: var(--sp-md);
}

/* ============================================================
   Disclaimer
   ============================================================ */

.disclaimer {
    margin-top: var(--sp-huge);
    padding: var(--sp-xl) var(--sp-xxl);
    background: var(--c-canvas-cream);
    border-radius: var(--r-lg);
    color: var(--c-ink-secondary);
    font-size: 14px;
    line-height: 1.6;
}
.disclaimer p { margin: 0; color: var(--c-ink-secondary); }

/* ============================================================
   Media queries
   ============================================================ */

@media (max-width: 1024px) {
    .site-footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--sp-xl);
    }
    .site-footer__brand-block { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .container { padding: 0 var(--sp-lg); }
    h1 { font-size: clamp(2rem, 7vw, 2.75rem); letter-spacing: -0.8px; }
    .dashboard-card__criteria { grid-template-columns: 1fr; }
    .related-list { columns: 1; }
    .site-footer__inner { grid-template-columns: 1fr 1fr; gap: var(--sp-lg); }
    .mesh-host--hero { min-height: 280px; }
}

@media (max-width: 600px) {
    .site-header__inner {
        justify-content: center;
        text-align: center;
    }
    .main-nav {
        width: 100%;
        justify-content: center;
        font-size: 14px;
    }
    .main-nav a { padding: var(--sp-xs) var(--sp-sm); }
    .site-footer__inner { grid-template-columns: 1fr; }
    .category-grid__item a { padding: var(--sp-lg); min-height: 120px; }
    .dashboard-card,
    .static-page { padding: var(--sp-xl); }
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }
}