/* ============================================================
   ИНВЕНТУМ — стили сайта
   ============================================================ */

/* ---------- Reset / Base ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color .2s ease;
}

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

button {
    font-family: inherit;
    cursor: pointer;
}

h1, h2, h3, h4 {
    font-family: 'Manrope', 'Inter', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 .6em;
    color: var(--heading);
    letter-spacing: -.01em;
}

p {
    margin: 0 0 1em;
}

p:last-child {
    margin-bottom: 0;
}

/* ---------- Tokens ---------- */
:root {
    --bg: #ffffff;
    --bg-soft: #f6f8fb;
    --bg-dark: #0b1220;
    --bg-darker: #060912;

    --text: #2a3242;
    --text-soft: #5a6478;
    --text-muted: #8893a8;
    --heading: #0f1729;
    --heading-on-dark: #ffffff;

    --accent: #2f6dff;
    --accent-hover: #1d56e6;
    --accent-soft: #e8f0ff;
    --accent-glow: rgba(47, 109, 255, .25);

    --border: #e3e8f0;
    --border-soft: #eef1f6;
    --border-dark: rgba(255, 255, 255, .14);

    --shadow-sm: 0 1px 2px rgba(15, 23, 41, .04), 0 1px 3px rgba(15, 23, 41, .06);
    --shadow-md: 0 4px 12px rgba(15, 23, 41, .06), 0 8px 24px rgba(15, 23, 41, .08);
    --shadow-lg: 0 8px 24px rgba(15, 23, 41, .08), 0 24px 48px rgba(15, 23, 41, .12);

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;

    --container: 1180px;
    --gutter: 24px;
}

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
}

.section {
    padding: 96px 0;
}

.section--concept {
    background: var(--bg);
}

.section--features {
    background: var(--bg-soft);
}

.section--tech {
    background: var(--bg);
}

.section--roadmap {
    background: var(--bg-soft);
}

.section--history {
    background: var(--bg);
}

.section--cooperation {
    background: var(--bg-soft);
}

.section--contact {
    background: var(--bg);
    padding-bottom: 120px;
}

.section__head {
    max-width: 760px;
    margin: 0 auto 56px;
    text-align: center;
}

.section__eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 14px;
}

.section__title {
    font-size: clamp(28px, 4vw, 42px);
    margin-bottom: 18px;
}

.section__lede {
    font-size: clamp(16px, 1.5vw, 18px);
    color: var(--text-soft);
    line-height: 1.65;
    margin: 0;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: 1.5px solid transparent;
    transition: all .2s ease;
    text-align: center;
    line-height: 1;
}

.btn--primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn--primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn--ghost {
    background: transparent;
    color: var(--heading-on-dark);
    border-color: rgba(255, 255, 255, .35);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, .08);
    border-color: rgba(255, 255, 255, .6);
    color: #fff;
}

/* ============================================================
   Навигация
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(11, 18, 32, .55);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    transition: background .25s ease, border-color .25s ease;
}

.nav.is-scrolled {
    background: rgba(255, 255, 255, .92);
    border-bottom-color: var(--border);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav__brand {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-family: 'Manrope', sans-serif;
    font-weight: 800;
    font-size: 18px;
    letter-spacing: .06em;
}

.nav.is-scrolled .nav__brand {
    color: var(--heading);
}

.nav__brand:hover {
    color: #fff;
}

.nav.is-scrolled .nav__brand:hover {
    color: var(--heading);
}

.nav__logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    transition: opacity .25s ease;
}

.nav__logo--dark {
    position: absolute;
    opacity: 0;
}

.nav.is-scrolled .nav__logo--light {
    opacity: 0;
}

.nav.is-scrolled .nav__logo--dark {
    opacity: 1;
}

.nav__title {
    font-weight: 800;
}

.nav__menu {
    display: flex;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav__menu a {
    display: inline-block;
    padding: 9px 14px;
    color: rgba(255, 255, 255, .85);
    font-size: 14px;
    font-weight: 500;
    border-radius: 999px;
    transition: color .2s ease, background .2s ease;
}

.nav.is-scrolled .nav__menu a {
    color: var(--text);
}

.nav__menu a:hover {
    color: #fff;
    background: rgba(255, 255, 255, .1);
}

.nav.is-scrolled .nav__menu a:hover {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav__cta {
    background: var(--accent) !important;
    color: #fff !important;
    padding: 9px 18px !important;
}

.nav__cta:hover {
    background: var(--accent-hover) !important;
}

.nav__burger {
    display: none;
    background: none;
    border: 0;
    width: 36px;
    height: 36px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 0;
}

.nav__burger span {
    display: block;
    height: 2px;
    width: 22px;
    margin: 0 auto;
    background: #fff;
    border-radius: 2px;
    transition: transform .2s ease, opacity .2s ease, background .2s ease;
}

.nav.is-scrolled .nav__burger span {
    background: var(--heading);
}

.nav__burger.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__burger.is-open span:nth-child(2) {
    opacity: 0;
}

.nav__burger.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--heading-on-dark);
    padding: 120px 0 80px;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        url('img/milky-way.jpg') center/cover no-repeat,
        var(--bg-darker);
    z-index: 0;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at top, rgba(47, 109, 255, .18) 0%, transparent 50%),
        linear-gradient(180deg, rgba(6, 9, 18, .55) 0%, rgba(6, 9, 18, .85) 100%);
    z-index: 1;
}

.hero__inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 880px;
}

.hero__logo {
    width: 96px;
    height: 96px;
    margin: 0 auto 28px;
    object-fit: contain;
    filter: drop-shadow(0 6px 24px rgba(47, 109, 255, .35));
}

.hero__title {
    font-size: clamp(48px, 8vw, 92px);
    font-weight: 800;
    letter-spacing: .08em;
    margin: 0 0 18px;
    color: #fff;
    text-shadow: 0 4px 32px rgba(0, 0, 0, .4);
}

.hero__tagline {
    font-family: 'Manrope', sans-serif;
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 600;
    color: #fff;
    margin: 0 0 18px;
    line-height: 1.25;
}

.hero__subtitle {
    font-size: clamp(15px, 1.6vw, 18px);
    color: rgba(255, 255, 255, .78);
    line-height: 1.6;
    max-width: 640px;
    margin: 0 auto 40px;
}

.hero__actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero__support {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 14px 22px 14px 16px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 999px;
    transition: background .2s ease, border-color .2s ease, transform .2s ease;
    color: rgba(255, 255, 255, .92);
}

.hero__support:hover {
    background: rgba(255, 255, 255, .1);
    border-color: rgba(255, 255, 255, .28);
    transform: translateY(-1px);
    color: #fff;
}

.hero__support-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
    flex-shrink: 0;
}

.hero__support-texts {
    display: flex;
    flex-direction: column;
    text-align: left;
    line-height: 1.25;
}

.hero__support-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: rgba(255, 255, 255, .6);
    font-weight: 500;
}

.hero__support-name {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-top: 2px;
}

.hero__scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    width: 28px;
    height: 44px;
    border: 2px solid rgba(255, 255, 255, .35);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    transition: border-color .2s ease;
}

.hero__scroll:hover {
    border-color: rgba(255, 255, 255, .7);
}

.hero__scroll span {
    width: 4px;
    height: 8px;
    background: #fff;
    border-radius: 2px;
    animation: scrollDot 1.6s ease-in-out infinite;
}

@keyframes scrollDot {
    0%   { transform: translateY(0);    opacity: 1; }
    60%  { transform: translateY(14px); opacity: 0; }
    100% { transform: translateY(0);    opacity: 0; }
}

/* ============================================================
   Концепция
   ============================================================ */
.concept-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 64px;
}

.concept-card {
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.concept-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-soft);
    box-shadow: var(--shadow-md);
}

.concept-card__icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent) 0%, #6388ff 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.concept-card__icon svg {
    width: 32px;
    height: 32px;
}

.concept-card__title {
    font-size: 20px;
    margin-bottom: 14px;
}

.concept-card__text {
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.65;
}

.concept-illustration {
    margin: 0 0 56px;
    text-align: center;
}

.concept-illustration img {
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    display: inline-block;
    max-width: 100%;
}

.concept-illustration figcaption {
    margin-top: 18px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.concept-highlight {
    max-width: 880px;
    margin: 0 auto;
    padding: 36px 40px;
    background: linear-gradient(135deg, var(--bg-darker) 0%, #131c34 100%);
    border-radius: var(--radius-lg);
    color: rgba(255, 255, 255, .92);
    position: relative;
    overflow: hidden;
}

.concept-highlight::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 60%;
    height: 180%;
    background: radial-gradient(ellipse, rgba(47, 109, 255, .25) 0%, transparent 60%);
    pointer-events: none;
}

.concept-highlight p {
    font-size: clamp(16px, 1.7vw, 19px);
    line-height: 1.65;
    position: relative;
    z-index: 1;
    margin: 0;
}

/* ============================================================
   Готовый функционал
   ============================================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 28px 26px;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.feature-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-soft);
    box-shadow: var(--shadow-md);
}

.feature-card__icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.feature-card__icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14.5px;
    color: var(--text-soft);
    line-height: 1.6;
}

/* ============================================================
   Технологии
   ============================================================ */
.tech-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tech-list__item {
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: 999px;
    padding: 12px 22px;
    transition: border-color .2s ease, transform .2s ease;
}

.tech-list__item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.tech-list__name {
    font-family: 'Manrope', sans-serif;
    font-weight: 600;
    font-size: 15px;
    color: var(--heading);
}

/* ============================================================
   Roadmap
   ============================================================ */
.roadmap-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.roadmap-card {
    background: var(--bg);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 36px 30px 32px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    position: relative;
    overflow: hidden;
}

.roadmap-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-soft);
    box-shadow: var(--shadow-md);
}

.roadmap-card__num {
    font-family: 'Manrope', sans-serif;
    font-size: 56px;
    font-weight: 800;
    line-height: 1;
    color: var(--accent-soft);
    margin-bottom: 16px;
    letter-spacing: -.03em;
}

.roadmap-card__icon {
    position: absolute;
    top: 28px;
    right: 28px;
    width: 56px;
    height: 56px;
    object-fit: contain;
    opacity: .85;
    transition: opacity .25s ease, transform .25s ease;
}

.roadmap-card:hover .roadmap-card__icon {
    opacity: 1;
    transform: scale(1.05);
}

.roadmap-card__title {
    font-size: 20px;
    margin-bottom: 14px;
}

.roadmap-card__text {
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.65;
}

/* ============================================================
   История
   ============================================================ */
.timeline {
    list-style: none;
    margin: 0 auto;
    padding: 0;
    max-width: 760px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline__item {
    position: relative;
    padding-left: 64px;
    padding-bottom: 36px;
}

.timeline__item:last-child {
    padding-bottom: 0;
}

.timeline__dot {
    position: absolute;
    left: 17px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--border);
    z-index: 1;
}

.timeline__dot--accent {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.timeline__dot--current {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 4px var(--accent-soft); }
    50%      { box-shadow: 0 0 0 8px rgba(47, 109, 255, .15); }
}

.timeline__date {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 14px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: 6px;
}

.timeline__body h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.timeline__body p {
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.6;
    margin: 0;
}

/* ============================================================
   Сотрудничество
   ============================================================ */
.cooperation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cooperation-card {
    background: var(--bg);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 32px 30px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.cooperation-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-soft);
    box-shadow: var(--shadow-md);
}

.cooperation-card h3 {
    font-size: 20px;
    margin-bottom: 14px;
    color: var(--accent);
}

.cooperation-card p {
    color: var(--text-soft);
    font-size: 15px;
    line-height: 1.65;
    margin: 0;
}

/* ============================================================
   Контакты
   ============================================================ */
.contact__container {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: start;
}

.contact__info .section__eyebrow {
    margin-bottom: 12px;
}

.contact__info .section__title {
    text-align: left;
    margin-bottom: 18px;
}

.contact__lede {
    font-size: 16px;
    color: var(--text-soft);
    line-height: 1.65;
    margin-bottom: 32px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 28px 0 0;
    border-top: 1px solid var(--border-soft);
}

.contact__row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact__label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    font-weight: 500;
}

.contact__value {
    font-size: 16px;
    font-weight: 500;
    color: var(--heading);
}

.contact__value[href]:hover {
    color: var(--accent);
}

/* Form */
.contact__form {
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-soft);
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg);
    font-family: inherit;
    font-size: 15px;
    color: var(--text);
    transition: border-color .2s ease, box-shadow .2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-input--textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.form-submit {
    margin-top: 6px;
    align-self: flex-start;
}

.form-hint {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.55;
    margin: 0;
}

.form-hint a {
    color: var(--accent);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: var(--bg-darker);
    color: rgba(255, 255, 255, .7);
    padding: 36px 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.footer__copy {
    font-size: 14px;
}

.footer__support {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: rgba(255, 255, 255, .85);
    transition: color .2s ease;
}

.footer__support:hover {
    color: #fff;
}

.footer__support-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    flex-shrink: 0;
}

.footer__support-texts {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.footer__support-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: rgba(255, 255, 255, .55);
}

.footer__support-name {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-top: 2px;
}

/* ============================================================
   Кнопка «наверх»
   ============================================================ */
.to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    border: 0;
    box-shadow: 0 6px 20px var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s ease, background .2s ease;
    z-index: 90;
}

.to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.to-top:hover {
    background: var(--accent-hover);
}

.to-top svg {
    width: 20px;
    height: 20px;
}

/* ============================================================
   Сценарии применения (тизер)
   ============================================================ */
.section--cases {
    background: var(--bg);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 32px 30px 28px;
    color: inherit;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-soft);
    box-shadow: var(--shadow-md);
    color: inherit;
}

.case-card__icon {
    width: 56px;
    height: 56px;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border-radius: 14px;
}

.case-card__icon img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.case-card__title {
    font-size: 19px;
    margin-bottom: 12px;
    color: var(--heading);
}

.case-card__text {
    font-size: 14.5px;
    color: var(--text-soft);
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 16px;
}

.case-card__more {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    transition: gap .2s ease;
}

.case-card:hover .case-card__more {
    color: var(--accent-hover);
}

/* ============================================================
   От прототипа к продукту
   ============================================================ */
.section--next {
    background: var(--bg);
}

.next-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
}

.next-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    align-items: start;
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 22px 26px;
    transition: border-color .2s ease, transform .2s ease;
}

.next-item:hover {
    border-color: var(--accent-soft);
    transform: translateX(4px);
}

.next-item__num {
    font-family: 'Manrope', sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    min-width: 44px;
    padding-top: 4px;
}

.next-item__body h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--heading);
}

.next-item__body p {
    font-size: 15px;
    color: var(--text-soft);
    line-height: 1.6;
    margin: 0;
}

.next-note {
    max-width: 880px;
    margin: 28px auto 0;
    padding: 18px 24px;
    background: var(--bg-soft);
    border-left: 3px solid var(--accent);
    border-radius: 0 10px 10px 0;
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.6;
    font-style: italic;
}

/* ============================================================
   Страницы-кейсы
   ============================================================ */
.case-page {
    background: var(--bg);
}

.case-hero {
    padding: 140px 0 56px;
    background: linear-gradient(135deg, #f7f9ff 0%, #eef3ff 100%);
    border-bottom: 1px solid var(--border-soft);
}

.case-hero__eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: .12em;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 16px;
}

.case-hero__title {
    font-size: clamp(28px, 4.2vw, 44px);
    margin: 0 0 18px;
    max-width: 880px;
}

.case-hero__lede {
    font-size: clamp(15px, 1.5vw, 18px);
    color: var(--text-soft);
    line-height: 1.65;
    max-width: 760px;
    margin: 0;
}

.case-section {
    padding: 72px 0;
}

.case-section--alt {
    background: var(--bg-soft);
}

.case-narrow {
    max-width: 760px;
}

.case-h2 {
    font-size: clamp(24px, 3vw, 32px);
    margin: 10px 0 18px;
}

.case-p {
    font-size: 16px;
    color: var(--text-soft);
    line-height: 1.7;
    margin-bottom: 18px;
}

.case-p strong {
    color: var(--heading);
    font-weight: 600;
}

.case-model,
.case-outcome {
    list-style: none;
    margin: 16px 0 24px;
    padding: 0;
    display: grid;
    gap: 10px;
}

.case-model li,
.case-outcome li {
    position: relative;
    padding: 12px 14px 12px 38px;
    background: var(--bg);
    border: 1px solid var(--border-soft);
    border-radius: 10px;
    font-size: 15px;
    color: var(--text);
    line-height: 1.55;
}

.case-section--alt .case-model li,
.case-section--alt .case-outcome li {
    background: var(--bg);
}

.case-model li::before,
.case-outcome li::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.case-model li strong {
    color: var(--heading);
    font-weight: 600;
    margin-right: 4px;
}

/* Скриншоты прототипа */
.case-shots {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.case-shot {
    margin: 0;
    display: flex;
    flex-direction: column;
}

.case-shot__frame {
    position: relative;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #f4f7ff 0%, #e8efff 100%);
    border: 1px solid rgba(47, 109, 255, .15);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 12px 28px -18px rgba(15, 28, 60, .35);
    transition: transform .25s ease, box-shadow .25s ease, border-color .2s ease;
    cursor: zoom-in;
}

.case-shot__frame:hover {
    transform: translateY(-2px);
    border-color: rgba(47, 109, 255, .45);
    box-shadow: 0 20px 36px -20px rgba(15, 28, 60, .4);
}

.case-shot__frame img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: top center;
}

.case-shot__type {
    display: block;
    margin: 0 0 10px;
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--accent);
}

.case-shot figcaption {
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.55;
}

/* Лайтбокс для скринов */
.shot-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(8, 14, 32, .88);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 24px;
    cursor: zoom-out;
}

.shot-lightbox.is-open {
    display: flex;
}

.shot-lightbox__img {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, .6);
}

.shot-lightbox__close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: 0;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
}

/* CTA на странице-кейсе */
.case-cta-section {
    padding: 80px 0;
    background: var(--bg);
}

.case-cta {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    padding: 48px 40px;
    background: linear-gradient(135deg, var(--bg-darker) 0%, #131c34 100%);
    border-radius: var(--radius-lg);
    color: rgba(255, 255, 255, .92);
    position: relative;
    overflow: hidden;
}

.case-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(47, 109, 255, .25) 0%, transparent 60%);
    pointer-events: none;
}

.case-cta h2 {
    color: #fff;
    margin-bottom: 12px;
    font-size: 26px;
    position: relative;
    z-index: 1;
}

.case-cta p {
    margin-bottom: 22px;
    color: rgba(255, 255, 255, .8);
    position: relative;
    z-index: 1;
}

.case-cta .btn {
    position: relative;
    z-index: 1;
}

/* ============================================================
   Reveal-анимации
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .6s ease, transform .6s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html { scroll-behavior: auto; }
    .timeline__dot--current { animation: none; }
    .hero__scroll span { animation: none; }
}

/* Активная ссылка в меню */
.nav__menu a.is-active {
    color: #fff;
}

.nav.is-scrolled .nav__menu a.is-active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav__menu a.nav__cta.is-active {
    background: var(--accent-hover) !important;
    color: #fff !important;
}

/* ============================================================
   Адаптивность
   ============================================================ */
@media (max-width: 980px) {
    .section { padding: 72px 0; }

    .concept-grid,
    .features-grid,
    .roadmap-grid,
    .cooperation-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-shots {
        grid-template-columns: 1fr;
    }

    .contact__container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav__menu {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 0;
        padding: 16px 24px 28px;
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        transition: transform .25s ease;
        align-items: stretch;
        max-height: calc(100vh - 68px);
        overflow-y: auto;
    }

    .nav__menu.is-open {
        transform: translateY(0);
    }

    .nav__menu li {
        border-bottom: 1px solid var(--border-soft);
    }

    .nav__menu li:last-child {
        border-bottom: 0;
        margin-top: 8px;
    }

    .nav__menu a {
        display: block;
        padding: 14px 4px;
        color: var(--text);
        font-size: 16px;
        border-radius: 0;
    }

    .nav__menu a:hover {
        background: transparent;
        color: var(--accent);
    }

    .nav__cta {
        text-align: center;
        border-radius: 999px !important;
        padding: 12px 18px !important;
    }

    .nav__burger {
        display: flex;
    }

    .hero {
        min-height: 90vh;
        padding: 110px 0 80px;
    }

    .footer__inner {
        flex-direction: column;
        text-align: center;
    }

    .roadmap-card__icon {
        width: 48px;
        height: 48px;
        top: 24px;
        right: 22px;
    }
}

@media (max-width: 640px) {
    .section { padding: 60px 0; }

    .section__head { margin-bottom: 40px; }

    .concept-grid,
    .features-grid,
    .roadmap-grid,
    .cooperation-grid,
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .next-item {
        grid-template-columns: 1fr;
        gap: 6px;
        padding: 20px 22px;
    }

    .next-item__num {
        font-size: 24px;
    }

    .case-hero {
        padding: 110px 0 44px;
    }

    .case-cta {
        padding: 36px 24px;
    }

    .concept-card,
    .roadmap-card { padding: 28px 24px; }

    .feature-card { padding: 24px 22px; }

    .concept-highlight {
        padding: 28px 24px;
    }

    .contact__form { padding: 24px 22px; }

    .hero__actions {
        flex-direction: column;
        align-items: stretch;
        max-width: 280px;
        margin-left: auto;
        margin-right: auto;
    }

    .hero__support {
        padding: 12px 20px 12px 14px;
    }

    .hero__support-logo {
        width: 38px;
        height: 38px;
    }

    .timeline::before {
        left: 18px;
    }

    .timeline__item {
        padding-left: 52px;
    }

    .timeline__dot {
        left: 11px;
    }

    .roadmap-card__icon {
        width: 44px;
        height: 44px;
        top: 22px;
        right: 20px;
    }

    .to-top {
        right: 16px;
        bottom: 16px;
        width: 42px;
        height: 42px;
    }
}