/* ===== Base (из предыдущего ответа) ===== */
:root {
    --c-blue: #1e3a8a;
    /* синий */
    --c-blue-600: #2543a6;
    --c-orange: #f97316;
    /* оранжевый */
    --c-orange-700: #ea580c;
    --c-white: #ffffff;
    /* белый */
    --c-muted: #e5e7eb;
    --c-text: #0b1220;
    --shadow: 0 10px 30px rgba(0, 0, 0, .12);
    --radius: 18px;
    --container: clamp(280px, 92vw, 1200px);
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    color: var(--c-text);
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
    overflow-x: hidden;
}

.container {
    width: var(--container);
    margin-inline: auto;
    padding: clamp(12px, 2vw, 24px)
}

.small {
    font-size: .9rem;
    opacity: .8
}

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

.row.between {
    justify-content: space-between
}

.row.center {
    align-items: center
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: saturate(140%) blur(8px);
    background: rgba(255, 255, 255, .7);
    border-bottom: 1px solid rgba(0, 0, 0, .06);
}

.brand {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c-blue), var(--c-orange));
    color: #fff;
    font-weight: 800;
    letter-spacing: .3px;
    text-decoration: none
}

.nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap
}

.nav-link {
    color: var(--c-blue);
    text-decoration: none;
    font-weight: 600;
    padding: 10px 12px;
    border-radius: 10px;
    transition: .2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    background: rgba(31, 78, 216, .08);
    outline: 2px solid transparent;
}

.hero {
    padding-block: clamp(32px, 6vw, 96px);
    text-align: center
}

.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(28px, 6vw, 56px);
    line-height: 1.05;
    color: var(--c-blue);
}

.lead {
    font-size: clamp(16px, 2.6vw, 20px);
    max-width: 900px;
    margin: 0 auto 28px
}

.cta-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width:520px) {
    .cta-grid {
        grid-template-columns: repeat(2, 1fr)
    }
}

@media (min-width:900px) {
    .cta-grid {
        grid-template-columns: repeat(3, 1fr)
    }
}

.cta-button {
    --pad: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    text-decoration: none;
    color: #fff;
    font-weight: 800;
    letter-spacing: .2px;
    padding: var(--pad) clamp(18px, 3vw, 28px);
    border-radius: var(--radius);
    background: #2543a6;
    box-shadow: var(--shadow);
    transform: translateY(0);
    transition: transform .2s ease, filter .2s ease;
    position: relative;
    overflow: hidden;
}

.cta-button:hover {
    transform: translateY(-3px)
}

.cta-button:active {
    transform: translateY(0) scale(.99)
}

.cta-button svg {
    width: 24px;
    height: 24px;
    stroke: #fff;
    stroke-width: 2;
    fill: none;
    flex: 0 0 auto
}

.cta-button span {
    font-size: clamp(16px, 2.4vw, 20px)
}

/* Ripple for [data-ripple] (добавляется JS) */
.cta-button .ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    background: rgba(255, 255, 255, .35);
    animation: ripple .6s linear;
    pointer-events: none;
}

@keyframes ripple {
    to {
        transform: scale(12);
        opacity: 0
    }
}

/* Footer */
.site-footer {
    padding: 28px 0;
    text-align: center;
    color: #334155
}

/* Анимированный фон (мягкие пятна) */
.bg-animated::before,
.bg-animated::after {
    content: "";
    position: fixed;
    inset: auto;
    z-index: -1;
    filter: blur(60px);
    opacity: .4;
    width: 36vw;
    height: 36vw;
    max-width: 720px;
    max-height: 720px;
    border-radius: 50%;
    background: radial-gradient(closest-side, var(--c-orange), transparent 70%);
    left: -10vw;
    top: -6vw;
    animation: float1 16s ease-in-out infinite;
}

.bg-animated::after {
    background: radial-gradient(closest-side, var(--c-blue), transparent 70%);
    left: auto;
    right: -12vw;
    top: auto;
    bottom: -8vw;
    animation: float2 18s ease-in-out infinite;
}

@keyframes float1 {
    50% {
        transform: translate(5vw, 4vw)
    }
}

@keyframes float2 {
    50% {
        transform: translate(-4vw, -3vw)
    }
}

/* Плавное появление блоков */
.reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .6s ease, transform .6s ease
}

.reveal.in {
    opacity: 1;
    transform: translateY(0)
}

.delay-1 {
    transition-delay: .08s
}

.delay-2 {
    transition-delay: .16s
}

/* Карточки на внутренних страницах */
.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width:600px) {
    .grid {
        grid-template-columns: repeat(2, 1fr)
    }
}

@media (min-width:900px) {
    .grid {
        grid-template-columns: repeat(3, 1fr)
    }
}

.card {
    background: #fff;
    border: 1px solid var(--c-muted);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.card h3 {
    margin: 0;
    font-size: clamp(18px, 2.4vw, 22px);
    color: var(--c-blue)
}

.card p {
    margin: 0;
    opacity: .85
}

.card .actions {
    margin-top: auto;
    display: flex;
    gap: 10px;
    flex-wrap: wrap
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-weight: 700;
    padding: 10px 14px;
    border-radius: 12px;
    transition: .2s ease;
    cursor: pointer;
}

.btn.blue {
    color: #fff;
    background: linear-gradient(135deg, var(--c-blue), var(--c-blue-600))
}

.btn.orange {
    color: #fff;
    background: linear-gradient(135deg, var(--c-orange), var(--c-orange-700))
}

.btn.ghost {
    color: var(--c-blue);
    background: #fff;
    border: 1px solid var(--c-muted)
}

.btn:hover {
    transform: translateY(-2px)
}

/* Крошки/шапка внутренних страниц */
.sub-header {
    background: linear-gradient(135deg, #fff, #eef2ff);
    border-bottom: 1px solid rgba(0, 0, 0, .06);
    padding: 16px 0;
}

.breadcrumbs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    font-size: .95rem;
}

.breadcrumbs a {
    color: var(--c-blue);
    text-decoration: none;
    font-weight: 600
}

.breadcrumbs .sep {
    opacity: .35
}

/* Фокус и доступность */
:focus-visible {
    outline: 3px solid rgba(31, 78, 216, .35);
    outline-offset: 3px;
    border-radius: 12px
}

/* Prefers reduced motion */
@media (prefers-reduced-motion:reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important
    }
}

/* No-JS */
.noscript {
    background: #fff3cd;
    color: #8a6d3b;
    padding: 10px 14px;
    text-align: center;
    border-bottom: 1px solid #ffeeba;
}

/* ===== PDF Uploader (scoped under body.pdf-uploader) ===== */
.pdf-uploader .tools-bar {
    display: grid;
    gap: 12px;
    margin-block: 18px;
    grid-template-columns: 1fr;
}

@media (min-width:700px) {
    .pdf-uploader .tools-bar {
        grid-template-columns: 1fr auto auto auto
    }
}

.pdf-uploader .search {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--c-muted);
    border-radius: 12px;
    background: #fff;
}

.pdf-uploader .search input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 1rem;
    background: transparent;
}

.pdf-uploader .dz {
    position: relative;
    border: 2px dashed rgba(30, 58, 138, .35);
    border-radius: 16px;
    background: linear-gradient(180deg, #fff, #f8fafc);
    padding: 22px;
    text-align: center;
    transition: border-color .2s ease, transform .2s ease;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.pdf-uploader .dz::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: .1;
    background: linear-gradient(90deg, var(--c-blue), var(--c-orange));
    mix-blend-mode: multiply;
    animation: dzGlow 6s ease-in-out infinite;
}

@keyframes dzGlow {
    50% {
        opacity: .18
    }
}

.pdf-uploader .dz.dragover {
    border-color: var(--c-orange);
    transform: translateY(-2px)
}

.pdf-uploader .dz h3 {
    margin: 0 0 6px;
    color: var(--c-blue)
}

.pdf-uploader .dz p {
    margin: 0;
    opacity: .8
}

.pdf-uploader .dz .pick {
    margin-top: 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    padding: 10px 14px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c-blue), var(--c-orange));
}

.pdf-uploader .dz input[type="file"] {
    display: none
}

.pdf-uploader .actions-inline {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end
}

.pdf-uploader .muted {
    opacity: .75
}

.pdf-uploader .pdf-grid {
    display: grid;
    gap: 16px;
    margin-top: 18px;
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width:600px) {
    .pdf-uploader .pdf-grid {
        grid-template-columns: repeat(2, 1fr)
    }
}

@media (min-width:1000px) {
    .pdf-uploader .pdf-grid {
        grid-template-columns: repeat(3, 1fr)
    }
}

@media (min-width:1400px) {
    .pdf-uploader .pdf-grid {
        grid-template-columns: repeat(4, 1fr)
    }
}

.pdf-uploader .pdf-card .file-head {
    display: flex;
    gap: 10px;
    justify-content: space-between;
    align-items: center;
}

.pdf-uploader .pdf-card .name {
    max-width: 68%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 800;
    color: var(--c-blue);
}

.pdf-uploader .pdf-card .meta {
    font-size: .9rem;
    opacity: .75
}

.pdf-uploader .pdf-card .preview {
    border: 1px solid var(--c-muted);
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}

.pdf-uploader .pdf-embed {
    width: 100%;
    height: 320px;
    display: block;
}

@media (max-width:480px) {
    .pdf-uploader .pdf-embed {
        height: 220px
    }
}

.pdf-uploader .hint {
    font-size: .9rem;
    opacity: .7
}

.pdf-uploader .toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    user-select: none;
}

.pdf-uploader .toggle input {
    width: 18px;
    height: 18px
}

.pdf-uploader .btn.danger {
    background: #fff;
    border: 1px solid #fecaca;
    color: #b91c1c
}

.pdf-uploader .btn.danger:hover {
    transform: translateY(-2px)
}

.cta-button.is-disabled {
    cursor: not-allowed;
    opacity: .6;
    filter: grayscale(.15) brightness(.95);
    pointer-events: none;
}