:root {
    --bg: #F5F6F8;
    --surface: #FFFFFF;
    --text-primary: #1e2a38;
    --text-secondary: #4A5568;
    --text-muted: #8C97A5;
    --accent: #2D4A7A;
    --accent-light: #3e5786;
    --accent-bg: #EEF2F8;
    --border: rgba(45, 74, 122, 0.1);
    --border-strong: rgba(45, 74, 122, 0.22);
    --tag-bg: rgba(45, 74, 122, 0.07);
    --grad-start: #1e2e4c;
    --grad-end: #3e5786;
    --card-radius: 14px;
    --font: 'Inter', system-ui, sans-serif;
}

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

body {
    font-family: var(--font, sans-serif);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    min-width: 400px;
}

h1 {
    font-size: 42px;
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text-primary)
}

h2 {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: var(--text-primary)
}

h3 {
    font-size: 17px;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: -0.015em;
    color: var(--text-primary)
}

h4 {
    font-size: 11px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--text-muted)
}

p {
    font-size: 15px;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-secondary)
}

small {
    font-size: 12px;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-muted)
}

a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    transition: opacity .15s
}

a:hover {
    opacity: .7
}

strong {
    font-weight: 600;
    color: var(--text-primary)
}

ul, ol {
    padding-left: 1.4em;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8
}

ul {
    list-style: disc
}

ol {
    list-style: decimal
}

ul li::marker {
    color: var(--accent)
}

ol li::marker {
    color: var(--accent);
    font-weight: 600;
    font-size: 13px
}

li + li {
    margin-top: 4px
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    color: var(--text-secondary)
}

caption {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .04em;
    color: var(--text-primary);
    text-align: left;
    padding-bottom: 12px
}

thead th {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-align: left;
    padding: 10px 14px;
    border-bottom: 2px solid var(--border-strong);
    background: var(--bg)
}

tbody td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: top
}

tbody tr:last-child td {
    border-bottom: none
}

tbody tr:hover td {
    background: var(--accent-bg)
}

tfoot td {
    padding: 10px 14px;
    border-top: 2px solid var(--border-strong);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary)
}

blockquote {
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    background: var(--accent-bg);
    border-radius: 0 var(--card-radius) var(--card-radius) 0;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 15px;
    line-height: 1.7
}

blockquote p {
    color: inherit;
    margin: 0
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 48px
}

.section {
    padding: 72px 0
}

.section + .section {
    border-top: 1px solid var(--border)
}

/* ============================================================
   HEADER
   ============================================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 246, 248, .92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 0 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 120px
}

.header__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    opacity: 1
}

.header__logo:hover {
    opacity: .85
}

.header__logo img {
    height: 78px;
    width: auto;
    display: block
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
    display: flex;
    align-items: center;
    gap: 4px
}

.nav__link {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 7px 14px;
    border-radius: 8px;
    transition: background .15s, color .15s
}

.nav__link:hover {
    background: var(--accent-bg);
    color: var(--accent);
    opacity: 1
}

.nav__link--active {
    color: var(--accent);
    font-weight: 500;
    background: var(--accent-bg)
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 11px 22px;
    border-radius: 10px;
    font-family: var(--font, sans-serif);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    border: none;
    letter-spacing: -.01em;
    transition: all .15s;
    color: inherit;
    opacity: 1
}

.btn:hover {
    opacity: 1
}

.btn--primary {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    color: #fff;
    box-shadow: 0 2px 12px rgba(30, 46, 76, .22)
}

.btn--primary:hover {
    box-shadow: 0 4px 20px rgba(30, 46, 76, .32);
    transform: translateY(-1px);
    color: #fff
}

.btn--secondary {
    background: var(--surface);
    color: var(--accent);
    border: 1px solid var(--border-strong)
}

.btn--secondary:hover {
    background: var(--accent-bg);
    color: var(--accent)
}

.btn--white {
    background: #fff;
    color: var(--accent);
    box-shadow: 0 2px 12px rgba(0, 0, 0, .1)
}

.btn--white:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
    transform: translateY(-1px);
    color: var(--accent)
}

.btn--ghost {
    background: rgba(255, 255, 255, .1);
    color: rgba(255, 255, 255, .8);
    border: 1px solid rgba(255, 255, 255, .2)
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, .18);
    color: rgba(255, 255, 255, .8)
}

.buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap
}

/* ============================================================
   TAGS
   ============================================================ */

.tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap
}

.tags__item {
    font-size: 11px;
    font-weight: 500;
    color: var(--accent);
    background: var(--tag-bg);
    padding: 3px 10px;
    border-radius: 20px;
    text-decoration: none
}

.tags__item:hover {
    opacity: 1;
    background: var(--accent-bg)
}

/* ============================================================
   CARDS
   ============================================================ */

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 22px 20px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: border-color .15s, box-shadow .15s, transform .15s
}

.card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(30, 46, 76, .1);
    transform: translateY(-2px);
    opacity: 1
}

.card__chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: var(--accent);
    text-decoration: none
}

.card__chip::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    flex-shrink: 0
}

.card__arrow {
    margin-top: auto;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none
}

/* ============================================================
   SECTION HELPERS
   ============================================================ */

.section__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 28px
}

.section__header-small {
    margin-bottom: 6px;
}

.section__header-title {
    margin-bottom: 10px;
}

.section__header-announce {
    max-width: 700px;
}

.section__header--end {
    justify-content: flex-end;
    margin-bottom: 24px
}

.section__link {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    padding: 6px 14px;
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    background: var(--surface);
    white-space: nowrap;
    transition: all .15s
}

.section__link:hover {
    background: var(--accent-bg);
    opacity: 1
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 64px;
    align-items: center
}

.hero__photo {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(30, 46, 76, .08)
}

.hero__photo img {
    width: 100%;
    height: auto;
    display: block
}

/* ============================================================
   POST LIST
   ============================================================ */

.post-list {
    display: flex;
    flex-direction: column
}

.post-list__item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    transition: opacity .15s
}

.post-list__item:hover {
    opacity: .75
}

.post-list__num {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    min-width: 24px;
    padding-top: 3px
}

.post-list__body {
    flex: 1
}

/* ============================================================
   ARTICLES
   ============================================================ */

.articles {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px
}

.article {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: border-color .15s, box-shadow .15s, transform .15s
}

.article:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(30, 46, 76, .1);
    transform: translateY(-2px);
    opacity: 1
}

.article__img {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    position: relative
}

.article__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: filter .3s ease
}

.article__body {
    padding: 16px 18px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px
}

/* ============================================================
   PROSE LAYOUT
   ============================================================ */

.prose {
    display: grid;
    grid-template-columns: 640px 1fr;
    gap: 64px;
    align-items: start
}

.prose p + p {
    margin-top: 12px
}

.prose h2 {
    margin-bottom: 12px
}

.prose h3 {
    margin-bottom: 6px
}

/* ============================================================
   SIDEBAR
   ============================================================ */

.sidebar {
    position: sticky;
    top: 108px;
    display: flex;
    flex-direction: column;
    gap: 12px
}

.sidebar__card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 20px 22px;
    display: flex;
    flex-direction: column;
    gap: 8px
}

/* ============================================================
   TIMELINE
   ============================================================ */

.timeline {
    display: flex;
    flex-direction: column;
    gap: 0
}

.timeline__item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border)
}

.timeline__item:last-child {
    border-bottom: none
}

.timeline__date {
    padding-top: 2px
}

/* ============================================================
   SKILLS
   ============================================================ */

.skills {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px
}

.skills__item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary)
}

/* ============================================================
   SERVICES
   ============================================================ */

.services {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px
}

.service-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 28px 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color .15s, box-shadow .15s, transform .15s
}

.service-card:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(30, 46, 76, .1);
    transform: translateY(-2px);
    opacity: 1
}

.service-card--featured {
    border-color: var(--accent);
    border-width: 2px
}

.service-card--wide {
    grid-column: 1 / -1
}

.service-card__link {
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    margin-top: auto
}

/* ============================================================
   CONTACTS
   ============================================================ */

.contacts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px
}

.contacts__channel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 20px 22px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: border-color .15s, box-shadow .15s, transform .15s
}

.contacts__channel:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(30, 46, 76, .1);
    transform: translateY(-2px);
    opacity: 1
}

.channels {
    display: flex;
    flex-direction: column;
    gap: 10px
}

.channel {
    text-decoration: none;
    color: inherit;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: border-color .15s
}

.channel:hover {
    border-color: var(--accent);
    opacity: 1
}

.channel__name {
    display: block;
    font-size: 13px
}

/* ============================================================
   PAGE LAYOUT
   ============================================================ */

.page-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 64px;
    align-items: start
}

.grid-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start
}

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

.faq {
    display: flex;
    flex-direction: column;
    gap: 0
}

.faq__item {
    padding: 20px 0;
    border-bottom: 1px solid var(--border)
}

.faq__item:last-child {
    border-bottom: none
}

.faq__question {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px
}

.faq__answer {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65
}

/* ============================================================
   CTA
   ============================================================ */

.cta {
    background: linear-gradient(135deg, var(--grad-start) 0%, var(--accent-light) 100%);
    border-radius: 20px;
    padding: 56px 60px;
    margin: 0 0 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    box-shadow: 0 12px 50px rgba(30, 46, 76, .22)
}

.cta h2 {
    color: #fff;
    margin-bottom: 12px
}

.cta__content {
    max-width: 560px
}

.cta__label {
    color: rgba(255, 255, 255, .45);
    margin-bottom: 12px
}

.cta__desc {
    color: rgba(255, 255, 255, .6);
    margin-top: 12px
}

.cta__actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-shrink: 0
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    border-top: 1px solid var(--border);
    padding: 28px 48px;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px
}

.footer__links {
    display: flex;
    gap: 16px
}

.footer__link {
    font-size: 12px;
    color: var(--text-muted);
    text-decoration: none
}

.footer__link:hover {
    color: var(--accent);
    opacity: 1
}

/* ============================================================
   UI KIT
   ============================================================ */

.kit-section {
    margin-bottom: 64px
}

.kit-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border)
}

.kit-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px
}

.kit-row--top {
    align-items: flex-start
}

.kit-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 28px 32px;
    margin-bottom: 12px
}

.kit-box--dark {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-end));
    border-color: transparent
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 32px 0
}

.table-wrap {
    overflow-x: auto
}

.swatch-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px
}

.swatch {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    border: 1px solid var(--border)
}

.swatch-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    text-align: center
}

.swatch-group {
    display: flex;
    flex-direction: column;
    align-items: center
}

.type-row {
    display: flex;
    align-items: baseline;
    gap: 32px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border)
}

.type-row:last-child {
    border-bottom: none;
    padding-bottom: 0
}

.type-row:first-child {
    padding-top: 0
}

.type-meta {
    min-width: 190px;
    flex-shrink: 0
}

.type-meta code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-bg);
    padding: 2px 7px;
    border-radius: 5px;
    display: inline-block;
    margin-bottom: 6px;
    text-decoration: none
}

.type-meta small {
    display: block;
    line-height: 1.7
}

.type-sample {
    flex: 1
}

/* ============================================================
   RESPONSIVE — TABLET (≤ 900px)
   ============================================================ */

@media (max-width: 960px) {
    .header {
        padding: 0 24px;
        height: auto;
        min-height: 72px;
        flex-wrap: wrap;
        gap: 0;
        padding-top: 12px;
        padding-bottom: 12px
    }

    .header__logo img {
        height: 75px
    }

    .nav {
        gap: 2px;
        flex-wrap: wrap
    }

    .nav__link {
        font-size: 13px;
        padding: 6px 10px
    }

    .container {
        padding: 0 24px
    }

    .section {
        padding: 52px 0
    }

    h1 {
        font-size: 32px
    }

    h2 {
        font-size: 22px
    }

    .articles {
        grid-template-columns: repeat(2, 1fr)
    }

    .cards {
        grid-template-columns: repeat(2, 1fr)
    }

    .services {
        grid-template-columns: repeat(2, 1fr)
    }

    .skills {
        grid-template-columns: repeat(2, 1fr)
    }

    .contacts {
        grid-template-columns: 1fr
    }

    .prose {
        grid-template-columns: 1fr;
        gap: 40px
    }

    .sidebar {
        position: static
    }

    .timeline__item {
        grid-template-columns: 120px 1fr;
        gap: 16px
    }

    .type-row {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start
    }

    .type-meta {
        min-width: unset
    }

    .swatch-row {
        gap: 12px
    }

    .cta {
        flex-direction: column;
        padding: 40px 32px;
        gap: 28px
    }

    .cta__actions {
        flex-direction: row
    }

    table {
        min-width: 560px
    }

    .footer {
        padding: 24px
    }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤ 600px)
   ============================================================ */

@media (max-width: 768px) {
    .header {
        padding: 10px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        height: auto
    }

    .header__logo img {
        height: 75px
    }

    .nav {
        width: 100%;
        gap: 2px
    }

    .nav__link {
        font-size: 12px;
        padding: 5px 9px
    }

    .container {
        padding: 0 16px
    }

    .section {
        padding: 40px 0
    }

    h1 {
        font-size: 26px;
        letter-spacing: -0.02em
    }

    h2 {
        font-size: 20px
    }

    h3 {
        font-size: 16px
    }

    p {
        font-size: 14px
    }

    .articles {
        grid-template-columns: 1fr
    }

    .cards {
        grid-template-columns: 1fr
    }

    .services {
        grid-template-columns: 1fr
    }

    .skills {
        grid-template-columns: repeat(2, 1fr)
    }

    .contacts {
        grid-template-columns: 1fr
    }

    .hero, .page-layout {
        display: flex;
        flex-direction: column-reverse;
        gap: 28px
    }

    .grid-two-col {
        display: flex;
        flex-direction: column;
        gap: 32px
    }

    .prose {
        grid-template-columns: 1fr;
        gap: 28px
    }

    .sidebar {
        position: static
    }

    .timeline__item {
        grid-template-columns: 1fr;
        gap: 4px
    }

    .timeline__date {
        padding-top: 0
    }

    .kit-box {
        padding: 18px 16px
    }

    .swatch {
        width: 36px;
        height: 36px
    }

    .type-row {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start
    }

    .type-meta {
        min-width: unset
    }

    .table-wrap {
        overflow-x: auto;
        border-radius: 10px
    }

    table {
        min-width: 520px;
        font-size: 13px
    }

    thead th, tbody td, tfoot td {
        padding: 9px 12px
    }

    blockquote {
        padding: 12px 16px
    }

    .cta {
        flex-direction: column;
        padding: 28px 20px;
        border-radius: 14px;
        gap: 24px;
        margin-bottom: 40px
    }

    .cta__actions {
        flex-direction: column;
        width: 100%
    }

    .cta__actions .btn {
        justify-content: center
    }

    .service-card--wide {
        grid-column: auto
    }

    .footer {
        padding: 20px 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px
    }

    .kit-row {
        gap: 8px
    }

    .skills__item {
        font-size: 12px;
        padding: 6px 10px
    }
}