static/css/style.css

:root {
    --color-primary: #0f3d4a;
    --color-primary-dark: #092c36;
    --color-secondary: #2f7d57;
    --color-accent: #d7a849;
    --color-bg: #f4f7f6;
    --color-card: #ffffff;
    --color-text: #1d2b2f;
    --color-muted: #5c6b70;
    --color-border: #dce5e3;
    --shadow: 0 12px 32px rgba(15, 61, 74, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

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

a:hover {
    color: var(--color-secondary);
}

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

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--color-primary);
}

.logo-mark {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    color: white;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.logo-text {
    font-size: 20px;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-left: auto;
    font-weight: 600;
    color: var(--color-muted);
}

.header-search {
    display: flex;
    gap: 8px;
}

.header-search input,
.search-page-form input,
.feedback-form input,
.feedback-form textarea {
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 12px 14px;
    font: inherit;
    background: #fff;
}

.header-search input {
    width: 170px;
}

.header-search button,
.button {
    border: 0;
    border-radius: 12px;
    padding: 12px 18px;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.header-search button,
.button-primary {
    background: var(--color-secondary);
    color: #fff;
}

.button-secondary {
    background: #fff;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.hero {
    padding: 64px 0;
    background: radial-gradient(circle at top right, rgba(47, 125, 87, 0.18), transparent 30%), linear-gradient(135deg, #edf7f3, #ffffff);
}

.hero-grid,
.article-hero-grid,
.content-layout,
.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.8fr);
    gap: 32px;
    align-items: center;
}

.hero h1,
.page-hero h1 {
    margin: 0 0 18px;
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.05;
    color: var(--color-primary-dark);
}

.hero-lead,
.page-hero p {
    font-size: 19px;
    color: var(--color-muted);
}

.eyebrow {
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 800;
    font-size: 13px;
}

.hero-actions {
    margin-top: 28px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.hero-banner,
.article-hero img {
    background: #fff;
    padding: 16px;
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.section {
    padding: 52px 0;
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: center;
}

.section-heading.left {
    text-align: left;
    margin-left: 0;
}

.section-heading h2,
.text-page h2 {
    margin: 0 0 10px;
    font-size: 30px;
    color: var(--color-primary-dark);
}

.category-grid,
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.category-card,
.article-card,
.widget,
.news-item,
.contact-card,
.sitemap-card,
.keyword-box {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 22px;
    box-shadow: 0 8px 24px rgba(15, 61, 74, 0.08);
}

.category-card {
    padding: 26px;
}

.category-icon {
    font-size: 34px;
}

.category-card h3,
.article-card h3,
.article-card h2 {
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.article-card {
    overflow: hidden;
}

.article-card-body {
    padding: 20px;
}

.tag,
.meta {
    color: var(--color-secondary);
    font-weight: 700;
    font-size: 14px;
}

.sidebar {
    align-self: start;
    display: grid;
    gap: 18px;
}

.widget {
    padding: 22px;
}

.banner-widget {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
}

.banner-widget h3 {
    margin-top: 0;
}

.news-small {
    display: grid;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.page-hero {
    padding: 58px 0;
    background: linear-gradient(135deg, #eaf4f1, #ffffff);
}

.page-hero.compact h1 {
    font-size: clamp(32px, 4vw, 46px);
}

.text-page {
    max-width: 860px;
}

.text-page p {
    font-size: 18px;
    color: #2f3d42;
}

.article-text p {
    background: #fff;
    border-radius: 18px;
    padding: 20px;
    border: 1px solid var(--color-border);
}

.keyword-box {
    padding: 22px;
    margin-top: 20px;
}

.related-link {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    font-weight: 700;
}

.news-list {
    display: grid;
    gap: 18px;
}

.news-item {
    padding: 24px;
}

.news-item time {
    color: var(--color-secondary);
    font-weight: 700;
}

.contact-grid {
    align-items: stretch;
}

.contact-card {
    padding: 28px;
}

.muted-card {
    background: #eef6f3;
}

.feedback-form {
    max-width: 760px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 28px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 18px;
}

.feedback-form label {
    display: grid;
    gap: 8px;
    font-weight: 700;
}

.feedback-form input,
.feedback-form textarea {
    width: 100%;
}

.search-page-form {
    display: flex;
    gap: 12px;
    margin-bottom: 28px;
}

.search-page-form input {
    flex: 1;
}

.empty-state {
    background: #fff;
    border: 1px dashed var(--color-border);
    padding: 20px;
    border-radius: 18px;
}

.sitemap-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

.sitemap-card {
    padding: 24px;
}

.sitemap-card.wide {
    grid-column: 1 / -1;
}

.sitemap-columns {
    columns: 3;
}

.sitemap-columns a {
    display: block;
    break-inside: avoid;
    padding: 5px 0;
}

.table-wrapper {
    overflow-x: auto;
    background: #fff;
    border-radius: 22px;
    border: 1px solid var(--color-border);
}

.seo-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 920px;
}

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

.seo-table th {
    background: #eaf4f1;
    color: var(--color-primary-dark);
}

.flash-wrapper {
    padding-top: 18px;
}

.flash {
    padding: 14px 18px;
    border-radius: 14px;
    margin-bottom: 12px;
    font-weight: 700;
}

.flash-success {
    background: #e2f4ea;
    color: #1f6b43;
}

.flash-error {
    background: #ffe7e7;
    color: #9b2525;
}

.site-footer {
    margin-top: 40px;
    background: var(--color-primary-dark);
    color: #d9e8e5;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr;
    gap: 28px;
    padding: 38px 0;
}

.footer-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-list li {
    margin-bottom: 8px;
}

.footer-bottom {
    text-align: center;
    padding: 16px;
    border-top: 1px solid rgba(255,255,255,0.12);
    color: #b9cbc8;
}

@media (max-width: 980px) {
    .header-inner,
    .main-nav,
    .header-search {
        flex-wrap: wrap;
    }

    .hero-grid,
    .article-hero-grid,
    .content-layout,
    .contact-grid,
    .footer-grid,
    .sitemap-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .category-grid,
    .article-grid {
        grid-template-columns: 1fr;
    }

    .search-page-form,
    .header-search {
        flex-direction: column;
        width: 100%;
    }

    .header-search input {
        width: 100%;
    }

    .sitemap-columns {
        columns: 1;
    }
}