/* ═══════════════════════════════════════════════════════════════════
   Глоссарий интернет-маркетинга — Стили
   Дизайн-направление: технический справочник — плотный, scannable,
   с чёткой типографской иерархией.
   ═══════════════════════════════════════════════════════════════════ */

/* --- CSS Variables (Design Tokens) --- */
:root {
    --color-bg:           #fafbfc;
    --color-surface:      #ffffff;
    --color-border:       #e1e4e8;
    --color-border-light: #eef0f3;

    --color-text:         #1a1d23;
    --color-text-secondary: #586069;
    --color-text-tertiary:  #8b949e;

    --color-accent:       #1a6ff5;
    --color-accent-hover: #1558cc;
    --color-accent-light: #e8f0fe;

    --color-link:         #1a6ff5;
    --color-link-hover:   #1558cc;
    --color-link-visited: #6b4cb4;

    --font-sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                  "Helvetica Neue", Arial, sans-serif;
    --font-mono:  "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono",
                  Menlo, Courier, monospace;

    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg:  12px;

    --shadow-sm:  0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:  0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg:  0 8px 24px rgba(0,0,0,0.08);

    --container-max: 960px;
    --container-pad: 24px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--color-link-hover);
    text-decoration: underline;
}
a:visited {
    color: var(--color-link-visited);
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

/* --- Header: вариант «Стекло» (градиент + blur) --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(135deg, rgba(26,111,245,.94), rgba(21,88,204,.94));
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255,255,255,.4);
    box-shadow: 0 1px 4px rgba(0,0,0,.12);
}
.site-header .container {
    display: flex;
    align-items: center;
    gap: 18px;
    height: 56px;
    flex-wrap: nowrap;
}

.site-logo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    line-height: 1.1;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: .04em;
    color: #fff !important;
    white-space: nowrap;
    text-decoration: none;
}
.site-logo-sub {
    font-size: .66rem;
    font-weight: 600;
    letter-spacing: .02em;
    color: rgba(255,255,255,.82);
    margin-top: 1px;
}
.site-logo:hover { text-decoration: none; color: #fff !important; }

.site-nav {
    display: flex;
    gap: 18px;
    font-size: .92rem;
    margin-left: 10px;
    align-items: center;
}
.site-nav a {
    color: rgba(255,255,255,.88);
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: color .15s, border-color .15s;
    text-decoration: none;
}
.site-nav a:hover {
    color: #fff;
    border-bottom-color: rgba(255,255,255,.7);
}

.header-search {
    display: flex;
    align-items: center;
    height: 34px;
    background: rgba(255,255,255,.16);
    border: 1px solid rgba(255,255,255,.35);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-left: auto;
    transition: border-color .15s, box-shadow .15s, background .15s;
}
.header-search:focus-within {
    background: rgba(255,255,255,.22);
    border-color: #fff;
    box-shadow: 0 0 0 3px rgba(255,255,255,.25);
}
.header-search input {
    border: none;
    background: transparent;
    padding: 6px 12px;
    font-size: .9rem;
    color: #fff;
    outline: none;
    width: 200px;
    font-family: var(--font-sans);
}
.header-search input::placeholder { color: rgba(255,255,255,.65); }
.header-search input::-webkit-search-cancel-button { -webkit-appearance: none; }
.header-search button {
    border: none;
    background: transparent;
    padding: 6px 10px;
    cursor: pointer;
    color: rgba(255,255,255,.85);
    display: flex;
    align-items: center;
    transition: color .15s;
}
.header-search button:hover { color: #fff; }

.header-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: .95rem;
    color: #fff !important;
    white-space: nowrap;
    text-decoration: none;
    font-variant-numeric: tabular-nums;
    transition: color .15s;
}
.header-phone:hover { color: rgba(255,255,255,.8) !important; text-decoration: none; }
.header-phone svg { flex: none; }

/* --- Main content --- */
.site-main {
    padding: 32px 0 64px;
    min-height: calc(100vh - 140px);
}

/* --- Footer --- */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}
.site-footer .container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.breadcrumbs a {
    color: var(--color-text-secondary);
}
.breadcrumbs a:hover {
    color: var(--color-accent);
}
.breadcrumbs-sep {
    color: var(--color-border);
}

/* --- Page title --- */
.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 24px;
    color: var(--color-text);
}

.count-badge {
    display: inline-block;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 12px;
    vertical-align: middle;
    margin-left: 8px;
}

/* --- Index page --- */
.index-hero {
    text-align: center;
    padding: 32px 0 40px;
}
.index-hero h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}
.index-description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.letter-section {
    margin-bottom: 36px;
}
.letter-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-border-light);
}

/* --- Alphabet grid --- */
.alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
    gap: 8px;
}

.alpha-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 6px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    transition: all 0.15s ease;
    text-decoration: none !important;
    min-height: 72px;
}
.alpha-card--active {
    cursor: pointer;
}
.alpha-card--active:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.alpha-card--active:hover .alpha-char {
    color: var(--color-accent);
}

.alpha-card--empty {
    opacity: 0.3;
    cursor: default;
}

.alpha-char {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text);
    transition: color 0.15s;
}
.alpha-count {
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
    margin-top: 4px;
    font-weight: 500;
}

/* --- Terms list --- */
.terms-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.terms-list-item {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    transition: background 0.1s;
}
.terms-list-item:hover {
    background: var(--color-accent-light);
}

.term-link {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    display: block;
}
.term-link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.term-preview {
    margin-top: 6px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.55;
}

.term-letter-badge {
    display: inline-block;
    font-size: 0.72rem;
    background: var(--color-border-light);
    color: var(--color-text-tertiary);
    padding: 1px 8px;
    border-radius: 8px;
    margin-left: 8px;
}

/* --- Term detail page --- */
.term-detail {
    max-width: 800px;
}
.term-detail-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    line-height: 1.25;
}

/* Definition content — preserve original HTML structure */
.term-detail-definition {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text);
}
/* H1 термина, вписанный в блок определения (без meta-панели) */
.term-detail-definition .term-detail-title {
    font-size: 1.8rem;
    margin: 0 0 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
    letter-spacing: -0.02em;
}
.term-detail-definition h2 {
    font-size: 1.25rem;
    margin: 28px 0 10px;
    font-weight: 600;
    color: var(--color-text);
}
.term-detail-definition h3 {
    font-size: 1.1rem;
    margin: 20px 0 8px;
    font-weight: 600;
}
.term-detail-definition p {
    margin-bottom: 14px;
}
.term-detail-definition ul, .term-detail-definition ol {
    margin: 8px 0 16px 24px;
}
.term-detail-definition li {
    margin-bottom: 6px;
}
.term-detail-definition a {
    color: var(--color-link);
    text-decoration: underline;
    text-decoration-color: var(--color-border);
    text-underline-offset: 3px;
}
.term-detail-definition a:hover {
    text-decoration-color: var(--color-accent);
}
.term-detail-definition strong {
    font-weight: 600;
}
.term-detail-definition code, .term-detail-definition tt {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--color-bg);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* ── KB-разметка: смысловые блоки статей (как itsectr.com) ─────────── */
.term-detail-definition div {
    margin: 18px 0;
}
.term-detail-definition .kb-header {
    padding: 16px 20px;
    background: var(--color-accent-light);
    border-radius: var(--radius-md);
    font-size: 1.02rem;
}
.term-detail-definition .kb-header > p { margin: 0; }
.term-detail-definition .kb-takeaways {
    padding: 10px 0 4px;
    background: none;
    border: 0;
    border-radius: 0;
}
.term-detail-definition .kb-takeaways__title {
    font-weight: 600;
    font-size: 1.05rem;
    margin: 0 0 10px;
    color: var(--color-accent);
}
.term-detail-definition .kb-takeaways__list {
    margin: 0 0 0 20px;
    padding: 0;
}
.term-detail-definition .kb-takeaways__list li {
    margin-bottom: 6px;
    color: var(--color-text);
}
/* маркеры списка «Главное» — оранжевые */
.term-detail-definition .kb-takeaways__list li::marker {
    color: rgb(251, 85, 49);
}
.term-detail-definition .kb-toc {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 18px;
}
.term-detail-definition .kb-toc__title { font-weight: 600; margin: 0 0 8px; }
.term-detail-definition .kb-toc__list { margin: 0 0 0 20px; padding: 0; }
.term-detail-definition .kb-section {
    margin: 22px 0;
    padding: 4px 0;
    border-top: 1px solid var(--color-border-light);
}
.term-detail-definition .kb-section:first-of-type { border-top: 0; }
.term-detail-definition .kb-tip,
.term-detail-definition .kb-warning,
.term-detail-definition .kb-quote {
    border-radius: var(--radius-md);
    padding: 12px 16px;
}
.term-detail-definition .kb-tip {
    background: #e6ffed;
    border-left: 4px solid #2ea043;
}
.term-detail-definition .kb-warning {
    background: #fff8c5;
    border-left: 4px solid #d29922;
}
.term-detail-definition .kb-quote {
    background: var(--color-bg);
    border-left: 4px solid var(--color-text-tertiary);
    font-style: italic;
    color: var(--color-text-secondary);
}
.term-detail-definition .kb-faq {
    border-left: 3px solid var(--color-border);
    padding: 4px 14px;
    margin: 14px 0;
}
.term-detail-definition .kb-faq h3 { margin: 8px 0 4px; }

/* ── Блок кода с подсветкой синтаксиса (светлая тема, как itsectr) ── */
.term-detail-definition .kb-code {
    position: relative;
    margin: 18px 0;
    border-radius: var(--radius-md);
    background: #f6f8fa;
    border: 1px solid #d0d7de;
    overflow: hidden;
}
.term-detail-definition .kb-code__lang {
    display: inline-block;
    position: absolute;
    top: 8px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #57606a;
    background: #eaeef2;
    border-radius: var(--radius-sm);
    padding: 2px 8px;
}
.term-detail-definition .kb-code pre {
    margin: 0;
    padding: 18px 16px 14px;
    background: transparent;
    overflow-x: auto;
    color: #1f2328;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.55;
    tab-size: 4;
}
.term-detail-definition .kb-code code {
    background: transparent;
    padding: 0;
    font-size: inherit;
    color: inherit;
    white-space: pre;
}
.term-detail-definition .kb-code code .token { font-family: inherit; }

/* токены подсветки (GitHub-light палитра) */
.term-detail-definition .token.c  { color: #6e7781; font-style: italic; }
.term-detail-definition .token.k  { color: #cf222e; }
.term-detail-definition .token.s  { color: #0a3069; }
.term-detail-definition .token.n  { color: #0550ae; }
.term-detail-definition .token.v  { color: #953800; }
.term-detail-definition .token.fn { color: #8250df; }
.term-detail-definition .token.o  { color: #cf222e; }
.term-detail-definition .token.p  { color: #24292f; }
.term-detail-definition .token.t  { color: #116329; }
.term-detail-definition .token.a  { color: #0550ae; }
.term-detail-definition .token.g  { color: #24292f; }

@media (max-width: 768px) {
    .term-detail-definition .kb-code pre { font-size: 0.8rem; padding: 14px 12px 12px; }
}

/* --- Term navigation (prev/next) --- */
.term-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-light);
    gap: 16px;
}
.term-nav-prev, .term-nav-next {
    display: flex;
    flex-direction: column;
    max-width: 45%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all 0.15s;
    text-decoration: none;
}
.term-nav-prev:hover, .term-nav-next:hover {
    border-color: var(--color-accent);
    background: var(--color-accent-light);
    text-decoration: none;
}
.term-nav-next { text-align: right; margin-left: auto; }

.term-nav-label {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
}
.term-nav-term {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
}

/* --- Search --- */
.empty-state {
    text-align: center;
    padding: 64px 20px;
    color: var(--color-text-secondary);
}
.empty-state h1 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--color-text);
}
.empty-state p {
    margin-bottom: 12px;
}

.btn-link {
    display: inline-block;
    padding: 10px 20px;
    background: var(--color-accent);
    color: #fff !important;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    transition: background 0.15s;
    text-decoration: none !important;
}
.btn-link:hover {
    background: var(--color-accent-hover);
}

.index-footer-links {
    text-align: center;
    margin-top: 32px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --container-pad: 16px;
    }
    .site-header .container {
        gap: 12px;
    }
    .site-nav { margin-left: 0; }
    .header-phone span { display: none; }
    .header-search {
        margin-left: 0;
        width: 100%;
        order: 10;
    }
    .header-search input { width: 100%; }
    .index-hero h1 { font-size: 1.5rem; }
    .term-detail-title { font-size: 1.5rem; }
    .alphabet-grid {
        grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
        gap: 6px;
    }
    .alpha-card { padding: 10px 4px; min-height: 60px; }
    .alpha-char { font-size: 1.1rem; }
    .term-nav { flex-direction: column; }
    .term-nav-prev, .term-nav-next { max-width: 100%; }
    .term-nav-next { margin-left: 0; text-align: left; }
}

@media (max-width: 480px) {
    .site-nav { display: none; }
    .alphabet-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* --- Print styles --- */
@media print {
    .site-header, .site-footer, .site-nav, .header-search, .header-phone,
    .breadcrumbs, .term-nav, .alpha-card--empty {
        display: none !important;
    }
    body { background: #fff; color: #000; }
    .container { max-width: 100%; padding: 0; }
    .term-detail-definition a::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}

/* =================================================================
   Модальное окно «Добавить термины»
   ================================================================= */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}
.modal-overlay.open {
    display: flex;
}
.modal-dialog {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.2s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(-20px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px 0;
}
.modal-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
}
.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
    transition: color 0.15s;
}
.modal-close:hover { color: var(--color-text); }

.modal-body {
    padding: 16px 24px;
    flex: 1;
    overflow-y: auto;
}
.modal-hint {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
}
.modal-body textarea {
    width: 100%;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.7;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    resize: vertical;
    outline: none;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color 0.15s, box-shadow 0.15s;
}
.modal-body textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 0 24px 20px;
}

.modal-result {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    line-height: 1.5;
}
.modal-result--ok {
    background: #e6f7e6;
    color: #1a6b1a;
    border: 1px solid #b7deb7;
}
.modal-result--error {
    background: #fde8e8;
    color: #a61b1b;
    border: 1px solid #f5c2c2;
}

/* Кнопка «добавить» в навигации */
.nav-add-btn {
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 500;
    padding: 5px 12px;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    transition: all 0.15s;
    white-space: nowrap;
    text-decoration: none;
}
.nav-add-btn:hover {
    background: var(--color-accent);
    color: #fff;
    text-decoration: none;
}

.btn-link--secondary {
    background: var(--color-bg);
    color: var(--color-text-secondary) !important;
    border: 1px solid var(--color-border);
}
.btn-link--secondary:hover {
    background: var(--color-border-light);
}

/* =================================================================
   Цветовая индикация наличия определения
   ================================================================= */
.terms-list-item.has-definition {
    border-left: 3px solid transparent;
    background: #edf7ed;        /* светло-зелёная пастельная */
}
.terms-list-item.no-definition {
    border-left: 3px solid transparent;
    background: #fef0f0;        /* светло-красная пастельная */
}

.no-def-badge {
    display: inline-block;
    font-size: 0.72rem;
    background: #f5c2c2;
    color: #a61b1b;
    padding: 1px 8px;
    border-radius: 8px;
    margin-left: 8px;
    font-weight: 500;
    vertical-align: middle;
}


/* ── Статистика на главной ───────────────────────────── */
.index-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 16px;
}
.stat-card {
    background: #fff;
    border: 1px solid #e3e6ea;
    border-radius: 12px;
    padding: 16px 22px;
    min-width: 180px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: #1a73e8;
    line-height: 1.1;
}
.stat-label {
    font-size: 13px;
    color: #667085;
    margin-top: 4px;
}
.stat-card.stat-complete .stat-number { color: #16a34a; }