@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

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

:root {
    --canvas:          #f7f7f4;
    --canvas-soft:     #fafaf7;
    --surface-card:    #ffffff;
    --surface-strong:  #e6e5e0;
    --hairline:        #e6e5e0;
    --hairline-soft:   #efeee8;
    --hairline-strong: #cfcdc4;
    --ink:             #26251e;
    --body:            #5a5852;
    --muted:           #807d72;
    --muted-soft:      #a09c92;
    --primary:         #f54e00;
    --primary-active:  #d04200;
    --on-primary:      #ffffff;
    --success:         #1f8a65;
    --error:           #cf2d56;
    --radius-xs:       4px;
    --radius-sm:       6px;
    --radius-md:       8px;
    --radius-lg:       12px;
    --radius-pill:     9999px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    background-color: var(--canvas);
    color: var(--body);
    font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
.site-header {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    height: 64px;
    gap: 32px;
}

.site-logo {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.site-logo span { color: var(--primary); }

.site-nav { margin-left: auto; }

.site-nav ul {
    display: flex;
    list-style: none;
    gap: 4px;
    align-items: center;
}

.site-nav a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--body);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--ink);
    background: var(--surface-strong);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    cursor: pointer;
    margin-left: auto;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* HERO */
.hero {
    padding: 80px 0 64px;
    border-bottom: 1px solid var(--hairline);
}

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

.hero-label {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    background: var(--surface-strong);
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 2.25rem;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 16px;
}

.hero-sub {
    font-size: 1rem;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
}

.hero-img img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}

/* SECTIONS */
.section { padding: 80px 0; }
.section + .section { border-top: 1px solid var(--hairline-soft); }

.section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-sub {
    font-size: 1rem;
    color: var(--body);
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: 48px;
}

/* CARDS GRID */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: border-color 0.15s;
}

.card:hover { border-color: var(--hairline-strong); }

.card-img {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 20px;
    border: 1px solid var(--hairline-soft);
}

.card-img img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
}

.card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.35;
    margin-bottom: 10px;
}

.card p {
    font-size: 0.875rem;
    color: var(--body);
    line-height: 1.55;
    margin-bottom: 16px;
}

.card-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    border-bottom: 1px solid var(--hairline-strong);
    padding-bottom: 1px;
    transition: border-color 0.15s, color 0.15s;
}

.card-link:hover { color: var(--primary); border-color: var(--primary); }

/* INFO BLOCKS */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.info-block {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.info-block h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
}

.info-block p {
    font-size: 0.875rem;
    color: var(--body);
    line-height: 1.6;
}

/* CONTACT FORM */
.contact-section {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 48px;
    max-width: 640px;
}

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

.form-row label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}

.form-row input,
.form-row textarea {
    width: 100%;
    background: var(--canvas);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--ink);
    line-height: 1.5;
    outline: none;
    transition: border-color 0.15s;
    height: 44px;
}

.form-row textarea { height: auto; min-height: 100px; resize: vertical; }

.form-row input:focus,
.form-row textarea:focus {
    border-color: var(--ink);
    background: var(--surface-card);
}

.form-row input.invalid,
.form-row textarea.invalid { border-color: var(--error); }

.field-error {
    font-size: 0.8125rem;
    color: var(--error);
    margin-top: 4px;
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-md);
    padding: 10px 18px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    height: 40px;
    cursor: pointer;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-success {
    display: none;
    background: #e8f5f1;
    border: 1px solid #1f8a6533;
    color: var(--success);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    font-size: 0.9375rem;
    margin-top: 16px;
}

/* ARTICLE PAGE */
.article-header { padding: 64px 0 48px; border-bottom: 1px solid var(--hairline); }

.article-header .breadcrumb {
    font-size: 0.8125rem;
    color: var(--muted);
    margin-bottom: 20px;
}

.article-header .breadcrumb a { color: var(--muted); }
.article-header .breadcrumb a:hover { color: var(--ink); }

.article-header h1 {
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: -0.03em;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: 16px;
    max-width: 720px;
}

.article-meta {
    font-size: 0.8125rem;
    color: var(--muted);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.article-body {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 64px;
    padding: 64px 0 80px;
    align-items: start;
}

.article-content h2 {
    font-size: 1.625rem;
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin: 40px 0 16px;
}

.article-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    margin: 28px 0 12px;
}

.article-content p { margin-bottom: 18px; line-height: 1.65; }

.article-content ul,
.article-content ol {
    margin: 0 0 18px 24px;
    line-height: 1.65;
}

.article-content li { margin-bottom: 6px; }

.article-content .lead {
    font-size: 1.0625rem;
    color: var(--ink);
    line-height: 1.6;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--hairline);
}

.article-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--hairline);
    margin: 32px 0;
}

.article-image img {
    width: 100%;
    height: auto;
    max-height: 420px;
    object-fit: cover;
}

.article-image figcaption {
    padding: 10px 16px;
    font-size: 0.8125rem;
    color: var(--muted);
    background: var(--canvas-soft);
    border-top: 1px solid var(--hairline-soft);
}

.info-box {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--ink);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin: 24px 0;
}

.info-box h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.info-box p, .info-box ul {
    font-size: 0.875rem;
    color: var(--body);
    margin-bottom: 0;
}

.info-box ul { margin-left: 16px; }

.article-sidebar { position: sticky; top: 80px; }

.sidebar-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.sidebar-card h4 {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.sidebar-toc { list-style: none; }

.sidebar-toc li { border-top: 1px solid var(--hairline-soft); }
.sidebar-toc li:first-child { border-top: none; }

.sidebar-toc a {
    display: block;
    font-size: 0.875rem;
    color: var(--body);
    padding: 8px 0;
    transition: color 0.15s;
}

.sidebar-toc a:hover { color: var(--ink); }

.sidebar-related a {
    display: block;
    font-size: 0.875rem;
    color: var(--body);
    padding: 8px 0;
    border-top: 1px solid var(--hairline-soft);
    line-height: 1.4;
    transition: color 0.15s;
}

.sidebar-related a:first-child { border-top: none; }
.sidebar-related a:hover { color: var(--ink); }

/* PAGE LAYOUT */
.page-header { padding: 64px 0 48px; border-bottom: 1px solid var(--hairline); }

.page-header h1 {
    font-size: 2.25rem;
    font-weight: 400;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin-bottom: 12px;
}

.page-header p { color: var(--body); max-width: 560px; }

.page-body { padding: 64px 0 80px; max-width: 720px; }

.page-body h2 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--ink);
    margin: 36px 0 12px;
}

.page-body p { margin-bottom: 16px; line-height: 1.65; }

.page-body ul, .page-body ol {
    margin: 0 0 16px 24px;
    line-height: 1.65;
}

.page-body li { margin-bottom: 6px; }

.updated-date {
    font-size: 0.8125rem;
    color: var(--muted);
    margin-bottom: 32px;
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    background: var(--ink);
    color: var(--canvas);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    max-width: 560px;
    width: calc(100% - 48px);
    display: flex;
    gap: 20px;
    align-items: center;
    box-shadow: 0 4px 24px rgba(38,37,30,0.18);
}

.cookie-text {
    font-size: 0.875rem;
    color: #c8c6be;
    line-height: 1.5;
    flex: 1;
}

.cookie-text a { color: var(--canvas); text-decoration: underline; }

.cookie-actions { display: flex; gap: 8px; flex-shrink: 0; }

.btn-cookie-accept {
    background: var(--primary);
    color: var(--on-primary);
    border: none;
    border-radius: var(--radius-md);
    padding: 8px 16px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-cookie-accept:hover { background: var(--primary-active); }

.btn-cookie-reject {
    background: transparent;
    color: #c8c6be;
    border: 1px solid rgba(200,198,190,0.35);
    border-radius: var(--radius-md);
    padding: 8px 16px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.btn-cookie-reject:hover { border-color: rgba(200,198,190,0.7); color: var(--canvas); }

/* FOOTER */
.site-footer {
    background: var(--canvas);
    border-top: 1px solid var(--hairline);
    padding-top: 64px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand {
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.footer-brand span { color: var(--primary); }

.footer-tagline {
    font-size: 0.8125rem;
    color: var(--muted);
    line-height: 1.55;
}

.footer-col h3 {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.footer-col ul { list-style: none; }

.footer-col ul li {
    margin-bottom: 8px;
    font-size: 0.875rem;
    color: var(--body);
}

.footer-col ul a {
    color: var(--body);
    transition: color 0.15s;
}

.footer-col ul a:hover { color: var(--ink); }

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

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--muted);
}

.footer-links { display: flex; gap: 12px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--ink); }

/* SPINNER */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    display: none;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .cards-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
    .article-body { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

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

    .site-nav {
        display: none;
        position: absolute;
        top: 65px;
        left: 0;
        right: 0;
        background: var(--canvas);
        border-bottom: 1px solid var(--hairline);
        padding: 12px 24px 16px;
    }

    .site-nav.open { display: block; }

    .site-nav ul {
        flex-direction: column;
        gap: 2px;
        align-items: stretch;
    }

    .site-nav a { padding: 10px 8px; }

    .hero { padding: 48px 0 40px; }

    .hero h1 { font-size: 1.75rem; }

    .section { padding: 48px 0; }

    .section-title { font-size: 1.75rem; }

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

    .info-grid { grid-template-columns: 1fr; }

    .contact-section { padding: 28px 20px; }

    .footer-inner { grid-template-columns: 1fr; gap: 24px; }

    .footer-bottom .container { flex-direction: column; gap: 8px; text-align: center; }

    .article-header h1 { font-size: 1.75rem; }

    .cookie-banner { flex-direction: column; align-items: flex-start; gap: 14px; }

    .cookie-actions { width: 100%; }

    .btn-cookie-accept,
    .btn-cookie-reject { flex: 1; text-align: center; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.5rem; }
    .section-title { font-size: 1.375rem; }
    .article-header h1 { font-size: 1.5rem; }
}