/* =============================================================
   SIGA · Блок «Кейсы (список)» — тёмная секция premium-уровня.

   Сама карточка-плашка (.siga-card--case) объявлена в global style.css
   и переиспользуется в архиве /cases/ и «связанных кейсах». Здесь —
   ТОЛЬКО контекст секции: фон+свечение, шапка, табы-фильтр, сетка
   (флагман на всю ширину), каскадное появление, NDA-подпись.
   ============================================================= */

.siga-section--cases {
    --c-dark-title: #F8FAFC;
    --c-dark-muted: #94A3B8;

    position: relative;
    padding: 110px 24px;
    background: var(--dark);
    color: #E2E8F0;
    overflow: hidden;
    isolation: isolate;
}

/* Фирменное свечение: emerald (действие) + cyan (данные). */
.siga-section--cases::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: -180px;
    right: -120px;
    width: 620px;
    height: 620px;
    background: radial-gradient(closest-side, rgba(16, 185, 129, 0.12), transparent 72%);
    pointer-events: none;
}
.siga-section--cases::after {
    content: "";
    position: absolute;
    z-index: -1;
    bottom: -220px;
    left: -160px;
    width: 560px;
    height: 560px;
    background: radial-gradient(closest-side, rgba(56, 189, 248, 0.08), transparent 72%);
    pointer-events: none;
}

.siga-section--cases .siga-section__inner {
    max-width: var(--container);
    margin: 0 auto;
}

/* ---- Шапка секции ---- */
.siga-section--cases .siga-section__head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 40px;
}
.siga-section--cases .siga-section__label {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-data, #38BDF8);
    margin-bottom: 16px;
}
.siga-section--cases .siga-section__label::before {
    content: ""; width: 22px; height: 1px;
    background: linear-gradient(90deg, var(--color-data, #38BDF8), transparent);
}
.siga-section--cases .siga-section__title {
    margin: 0;
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--c-dark-title) !important; /* h1 на архиве — перебиваем глобальный reset */
}
.siga-section--cases .siga-section__sub {
    margin: 12px 0 0;
    font-size: 16px;
    color: var(--c-dark-muted);
    max-width: 58ch;
}
/* Пагинация архива на тёмном */
.siga-section--cases .pagination,
.siga-section--cases .nav-links {
    margin-top: 28px;
    display: flex;
    gap: 8px;
    justify-content: center;
}
.siga-section--cases .nav-links .page-numbers {
    font-family: var(--font-mono);
    font-size: 13px;
    color: #94A3B8;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 7px 13px;
    text-decoration: none;
}
.siga-section--cases .nav-links .page-numbers.current,
.siga-section--cases .nav-links .page-numbers:hover {
    color: #fff;
    border-color: rgba(16, 185, 129, 0.5);
}

/* ---- Табы-фильтр по услугам ---- */
.siga-cases__filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin: 0 auto 44px;
}
.siga-cases__chip {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
    color: var(--c-dark-muted);
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: color .2s, background .2s, border-color .2s;
    white-space: nowrap;
}
.siga-cases__chip:hover { color: var(--c-dark-title); border-color: var(--dark-3); }
.siga-cases__chip.is-active {
    color: var(--dark);
    background: var(--color-accent);
    border-color: var(--color-accent);
    font-weight: 600;
}
.siga-cases__chip small { opacity: 0.7; margin-left: 6px; font-weight: 400; }
.siga-cases__chip.is-active small { opacity: 0.85; }
.siga-cases__chip:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* ---- Сетка (флагман — на всю ширину ряда) ---- */
.siga-grid--cases {
    display: grid;
    gap: var(--gap);
    grid-template-columns: repeat(2, 1fr);
}
.siga-grid--cases.siga-grid--cols-3 {
    grid-template-columns: repeat(3, 1fr);
}
.siga-card--case.siga-card--featured {
    grid-column: 1 / -1;
}

/* Скрытие карточки активным табом-фильтром. */
.siga-card--case.is-hidden { display: none; }

/* ---- Каскадное появление ---- */
.siga-grid--cases > .siga-card--case { animation: siga-cases-in 0.5s both; }
.siga-grid--cases > .siga-card--case:nth-child(1) { animation-delay: 0s; }
.siga-grid--cases > .siga-card--case:nth-child(2) { animation-delay: 0.07s; }
.siga-grid--cases > .siga-card--case:nth-child(3) { animation-delay: 0.14s; }
.siga-grid--cases > .siga-card--case:nth-child(4) { animation-delay: 0.21s; }
.siga-grid--cases > .siga-card--case:nth-child(5) { animation-delay: 0.28s; }
.siga-grid--cases > .siga-card--case:nth-child(6) { animation-delay: 0.35s; }
@keyframes siga-cases-in {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---- Подпись NDA под сеткой ---- */
.siga-section--cases .siga-section__nda {
    margin-top: 36px;
    text-align: center;
    font-size: 13px;
    font-style: italic;
    color: var(--c-dark-muted);
}
.siga-section--cases .siga-section__nda::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 9px;
    border-radius: 999px;
    background: var(--color-accent);
    vertical-align: middle;
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.16);
}

/* ---- Адаптив ---- */
@media (max-width: 820px) {
    .siga-section--cases { padding: 72px 18px; }
    .siga-section--cases .siga-section__head { margin-bottom: 32px; }
    .siga-cases__filter { margin-bottom: 32px; }
    .siga-grid--cases,
    .siga-grid--cases.siga-grid--cols-3 {
        grid-template-columns: 1fr;
    }
    .siga-card--case.siga-card--featured { grid-column: auto; }
}

/* Уважаем настройку «меньше движения». */
@media (prefers-reduced-motion: reduce) {
    .siga-grid--cases > .siga-card--case { animation: none; }
    .siga-card--case { transition: none; }
    .siga-card--case:not(.siga-card--static):hover { transform: none; }
}