:root {
  --blue: #2870de;
  --sky: #4e9aec;
  --purple: #892bb4;
  --magenta: #cc4ddf;
  --ink: #172033;
  --muted: #5e6678;
  --line: #dce6f4;
  --surface: #f6f9ff;
  --white: #fff;
  --shadow: 0 24px 70px rgb(40 112 222 / 14%);
  --radius: 24px;
  --container: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--white); font-family: Inter, Manrope, "Segoe UI", Arial, sans-serif; font-size: 16px; line-height: 1.6; }
body.modal-open { overflow: hidden; }
button, a { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
a { color: inherit; }
.container { width: var(--container); margin-inline: auto; }
.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px; color: var(--white); background: var(--ink); border-radius: 8px; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid var(--magenta); outline-offset: 3px; }

.site-header { position: sticky; z-index: 50; top: 0; background: rgb(255 255 255 / 92%); border-bottom: 1px solid rgb(220 230 244 / 75%); backdrop-filter: blur(16px); }
.header-inner { min-height: 82px; display: flex; align-items: center; gap: 18px; }
.header-organizers { min-width: 0; display: flex; align-items: center; gap: 12px; }
.brand { flex: 0 1 158px; }
.brand img { width: 158px; height: auto; }
.header-coorganizers { min-width: 0; display: flex; align-items: center; gap: 10px; padding-left: 12px; border-left: 1px solid var(--line); }
.header-logo { flex: none; width: auto; object-fit: contain; }
.header-logo--energia { height: 27px; }
.header-logo--nskv { height: 32px; }
.site-nav { display: flex; align-items: center; justify-content: center; gap: 17px; margin-left: auto; }
.site-nav a { color: #273044; font-size: .87rem; font-weight: 700; text-decoration: none; }
.site-nav a:hover { color: var(--purple); }
.site-nav .nav-register { display: none; }
.menu-toggle { display: none; width: 46px; height: 46px; padding: 11px; background: transparent; border: 1px solid var(--line); border-radius: 14px; }
.menu-toggle span { display: block; height: 2px; margin: 5px 0; background: var(--ink); border-radius: 99px; }

.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 13px 22px; color: var(--white); background: linear-gradient(110deg, var(--blue), var(--purple) 63%, var(--magenta)); border: 0; border-radius: 14px; box-shadow: 0 12px 28px rgb(105 56 196 / 20%); font-weight: 800; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgb(105 56 196 / 28%); }
.button--small { min-height: 44px; padding: 10px 17px; font-size: .9rem; }
.button--light { color: var(--purple); background: var(--white); box-shadow: none; }

.hero { position: relative; min-height: 650px; display: grid; align-items: center; overflow: hidden; isolation: isolate; background: radial-gradient(circle at 88% 18%, rgb(215 219 255 / 70%), transparent 31%), linear-gradient(145deg, #fff 28%, #f2f7ff 100%); }
.hero::after { content: ""; position: absolute; z-index: -2; width: 520px; height: 520px; right: -150px; bottom: -290px; background: linear-gradient(140deg, var(--sky), var(--magenta)); border-radius: 50%; opacity: .14; filter: blur(2px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.28fr) minmax(300px, .72fr); align-items: center; gap: clamp(48px, 7vw, 110px); padding-block: 88px; }
.hero-copy { max-width: 760px; }
.eyebrow, .section-kicker { margin: 0 0 16px; color: var(--blue); font-size: .82rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -.035em; }
h1 { max-width: 850px; margin-bottom: 25px; font-size: clamp(2.55rem, 5.4vw, 4.65rem); }
h2 { margin-bottom: 24px; font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.65rem); }
.hero-lead { max-width: 720px; margin: 0 0 34px; color: var(--muted); font-size: clamp(1.05rem, 1.8vw, 1.28rem); }
.date-card { position: relative; display: grid; min-height: 385px; align-content: center; padding: 42px; color: var(--white); background: linear-gradient(155deg, #286fdc, #7d36c7 62%, #cb4dde); border-radius: 36px 90px 36px 36px; box-shadow: var(--shadow); }
.date-card::before { content: ""; position: absolute; width: 80px; height: 80px; top: -24px; right: -24px; background: #d7dbff; border: 12px solid #fff; border-radius: 50%; }
.date-card__logo { width: 210px; height: auto; margin-bottom: 38px; padding: 9px 13px; background: #fff; border-radius: 10px; }
.date-card__day { font-size: clamp(6.2rem, 11vw, 9.5rem); font-weight: 900; line-height: .74; letter-spacing: -.08em; }
.date-card__month { margin-top: 20px; font-size: 1.7rem; font-weight: 800; }
.date-card__year { font-size: 1.05rem; font-weight: 800; letter-spacing: .14em; }
.date-card__place { max-width: 230px; margin-top: 34px; padding-top: 18px; border-top: 1px solid rgb(255 255 255 / 40%); }
.hero-network { position: absolute; z-index: -1; inset: 0; opacity: .7; }
.node { position: absolute; width: 16px; height: 16px; background: var(--sky); border: 4px solid #fff; border-radius: 50%; box-shadow: 0 0 0 1px rgb(78 154 236 / 20%); animation: pulse 4.5s ease-in-out infinite; }
.node--one { top: 18%; left: 43%; }.node--two { top: 68%; left: 48%; animation-delay: -1s; }.node--three { top: 24%; right: 7%; animation-delay: -2s; }.node--four { bottom: 12%; right: 24%; animation-delay: -3s; }
.link { position: absolute; height: 1px; background: linear-gradient(90deg, transparent, rgb(78 154 236 / 38%), transparent); transform-origin: left; }
.link--one { width: 32%; top: 20%; left: 43%; transform: rotate(12deg); }.link--two { width: 34%; top: 69%; left: 48%; transform: rotate(-38deg); }.link--three { width: 21%; bottom: 13%; right: 7%; transform: rotate(25deg); }

.announcement { color: var(--white); background: linear-gradient(105deg, #1c5fd0, #7b2eb0 70%, #b440d0); }
.announcement-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; padding-block: 70px; }
.announcement .section-kicker { color: #ceedff; }
.announcement h2 { margin-bottom: 0; }
.announcement-details { padding-left: 34px; border-left: 1px solid rgb(255 255 255 / 36%); }
.announcement-details p { margin: 0 0 20px; font-size: 1.05rem; }
.section { padding-block: 100px; }
.program-preview { background: var(--surface); }
.timeline-card { display: grid; grid-template-columns: 170px minmax(0, 1fr); max-width: 900px; margin-top: 40px; padding: 30px; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.timeline-card time { color: var(--purple); font-size: 1.2rem; font-weight: 900; }
.timeline-card__place { margin: 0 0 8px; color: var(--blue); font-weight: 800; }
.timeline-card h3, .timeline-card p:last-child { margin-bottom: 0; }

.section-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .65fr); align-items: end; gap: 56px; margin-bottom: 52px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p, .section-lead { margin: 0; color: var(--muted); font-size: 1.08rem; }

.about { position: relative; overflow: hidden; }
.about::before { content: ""; position: absolute; width: 360px; height: 360px; top: 90px; left: -230px; background: #d7dbff; border-radius: 50%; opacity: .48; }
.about-grid { position: relative; display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(60px, 9vw, 130px); }
.about-intro { position: sticky; top: 132px; align-self: start; }
.about-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.about-points article { min-height: 245px; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.about-points span { color: var(--magenta); font-size: .8rem; font-weight: 900; letter-spacing: .12em; }
.about-points h3 { margin: 56px 0 14px; }
.about-points p { margin: 0; color: var(--muted); }

.program { background: #f7f9fe; }
.timeline { position: relative; }
.timeline::before { content: ""; position: absolute; top: 0; bottom: 0; left: 109px; width: 1px; background: linear-gradient(var(--blue), var(--magenta)); }
.timeline-item { position: relative; display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 42px; padding-bottom: 38px; }
.timeline-item::before { content: ""; position: absolute; z-index: 2; top: 26px; left: 101px; width: 16px; height: 16px; background: #fff; border: 4px solid var(--blue); border-radius: 50%; }
.timeline-time { display: grid; align-content: start; padding-top: 21px; color: var(--ink); }
.timeline-time time { font-size: 1.25rem; font-weight: 900; }
.timeline-time span { color: var(--muted); font-size: .9rem; }
.timeline-content { padding: 28px 32px; background: #fff; border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 16px 42px rgb(35 76 144 / 7%); }
.timeline-content > :last-child { margin-bottom: 0; }
.timeline-place, .event-type, .parallel-label { margin: 0 0 10px; color: var(--blue); font-size: .8rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.timeline-content h3 { margin-bottom: 14px; }
.timeline-content > p:not(.timeline-place, .event-type, .parallel-label) { color: var(--muted); }
.timeline-item--fair .timeline-content { border-color: #d5c3ef; background: linear-gradient(145deg, #fff, #fbf6ff); }
.fair-list { margin: 22px 0; padding: 16px 18px; background: #fff; border: 1px solid #e6daf4; border-radius: 14px; }
.fair-list summary { color: var(--purple); font-weight: 800; }
.fair-list ul { margin: 18px 0 2px; padding-left: 20px; }
.fair-list li + li { margin-top: 7px; }
.text-button, .room-card button, .stretched-button { padding: 0; color: var(--purple); background: none; border: 0; font-weight: 850; text-align: left; }
.text-button { display: inline-flex; align-items: center; gap: 10px; }
.text-button span { font-size: 1.3rem; }
.speaker-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 26px 0 0; padding: 1px; background: var(--line); list-style: none; }
.speaker-list li { display: grid; align-content: start; gap: 7px; padding: 20px; background: #fff; }
.speaker-list strong { line-height: 1.3; }
.speaker-list span { color: var(--muted); font-size: .92rem; }
.timeline-item--compact .timeline-content { display: flex; align-items: baseline; gap: 25px; padding-block: 22px; }
.timeline-item--compact h3, .timeline-item--compact p { margin: 0; }
.timeline-item--parallel .timeline-content { padding: 32px; }
.parallel-label { margin-top: 30px; color: var(--purple); }
.room-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.room-card { min-height: 180px; padding: 22px; background: #f5f8ff; border: 1px solid #dce5f7; border-radius: 17px; }
.room-card p { margin: 0 0 30px; color: var(--blue); font-size: .78rem; font-weight: 900; letter-spacing: .11em; text-transform: uppercase; }
.room-card button { display: block; width: 100%; color: var(--ink); line-height: 1.35; }
.room-card button:hover { color: var(--purple); }
.room-card button span { display: block; margin-bottom: 6px; color: var(--purple); font-size: .78rem; letter-spacing: .05em; }
.room-card--split button + button { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); }
.timeline-item--final::before { border-color: var(--magenta); background: var(--magenta); box-shadow: 0 0 0 9px rgb(204 77 223 / 14%); }
.timeline-item--final .timeline-content { color: #fff; background: linear-gradient(120deg, #286fdc, #7e32b9 64%, #cc4ddf); border: 0; box-shadow: 0 22px 54px rgb(91 44 172 / 24%); }
.timeline-item--final .timeline-place, .timeline-item--final .event-type, .timeline-item--final .timeline-content > p { color: #fff; }
.timeline-item--final .event-type { opacity: .72; }

.platforms { overflow: hidden; }
.platform-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 16px; }
.platform-card { position: relative; grid-column: span 4; min-height: 280px; display: flex; flex-direction: column; padding: 28px; background: linear-gradient(145deg, #f6f9ff, #fff); border: 1px solid var(--line); border-radius: 22px; transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.platform-card:nth-child(4), .platform-card:nth-child(5) { grid-column: span 6; }
.platform-card:hover { transform: translateY(-4px); border-color: #bdcfee; box-shadow: var(--shadow); }
.platform-card p { margin: 0 0 38px; color: var(--blue); font-size: .78rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.platform-card h3 { margin-bottom: 34px; }
.platform-card .stretched-button { margin-top: auto; }
.platform-card--accent { color: #fff; background: linear-gradient(145deg, #286fdc, #8b2bb6 70%, #ce4dde); border: 0; }
.platform-card--accent p, .platform-card--accent .stretched-button { color: #fff; }

.partners { background: #f7f9fe; }
.partner-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 45px; }
.partner-logo { height: 230px; min-width: 0; display: grid; place-items: center; overflow: hidden; padding: 34px; background: #fff; border: 1px solid var(--line); border-radius: 24px; }
.partner-logo img { display: block; width: 100%; height: 140px; min-width: 0; object-fit: contain; }

.venue { position: relative; overflow: hidden; color: #fff; background: #17254d; }
.venue::after { content: ""; position: absolute; width: 540px; height: 540px; right: -160px; top: -260px; background: linear-gradient(140deg, var(--blue), var(--magenta)); border-radius: 50%; opacity: .9; }
.venue-grid { position: relative; z-index: 1; display: grid; grid-template-columns: .55fr 1fr; align-items: center; gap: 70px; }
.venue-date { display: flex; align-items: flex-end; gap: 18px; }
.venue-date span { font-size: clamp(7rem, 15vw, 12rem); font-weight: 950; line-height: .7; letter-spacing: -.09em; }
.venue-date small { padding-bottom: 8px; font-size: 1rem; font-weight: 900; letter-spacing: .1em; }
.venue .section-kicker { color: #b7d9ff; }
.venue h2 { max-width: 610px; }
.venue-address { margin: -4px 0 30px; font-size: 1.18rem; }

.contacts { background: linear-gradient(180deg, #fff, #f5f8ff); }
.contacts-grid { display: grid; grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); gap: clamp(54px, 8vw, 110px); align-items: start; }
.contacts-copy { position: sticky; top: 122px; }
.contacts-copy > p:not(.section-kicker) { color: var(--muted); }
.contact-links { display: grid; margin: 32px 0; border-top: 1px solid var(--line); }
.contact-links a { display: grid; gap: 4px; padding: 18px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.contact-links span { color: var(--muted); font-size: .78rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.contact-links strong { font-size: 1.15rem; }
.button--outline { color: var(--purple); background: transparent; border: 1px solid #b9c9e8; box-shadow: none; }
.contact-form { padding: 36px; background: #fff; border: 1px solid var(--line); border-radius: 26px; box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.contact-form label:not(.consent-check, .honeypot) { display: block; margin-bottom: 18px; font-weight: 800; }
.contact-form input[type="text"], .contact-form input[type="tel"], .contact-form input[type="email"], .contact-form textarea { width: 100%; min-height: 50px; padding: 12px 14px; color: var(--ink); background: #fbfcff; border: 1px solid #cbd7eb; border-radius: 11px; font: inherit; }
.contact-form label:not(.consent-check, .honeypot) > input, .contact-form label:not(.consent-check, .honeypot) > textarea { margin-top: 8px; }
.contact-form textarea { min-height: 142px; resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--blue); outline: 3px solid rgb(40 112 222 / 13%); }
.contact-form [aria-invalid="true"] { border-color: #b12246 !important; }
.consent-check { display: grid; grid-template-columns: 23px 1fr; align-items: start; gap: 12px; margin: 8px 0 24px; color: var(--muted); font-size: .92rem; }
.consent-check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--purple); }
.consent-check a { color: var(--purple); }
.honeypot { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.form-status { min-height: 26px; margin: 18px 0 0; font-weight: 700; }
.form-status.is-success { color: #147242; }.form-status.is-error { color: #a21d40; }.form-status.is-info { color: #2859a6; }

.site-footer { padding-block: 48px; color: #dce6ff; background: #101a36; }
.footer-grid { display: grid; grid-template-columns: 210px 1fr 1fr; align-items: start; gap: 45px; }
.footer-brand img { width: 190px; height: auto; filter: brightness(0) invert(1); opacity: .92; }
.footer-grid p { margin: 0 0 6px; }
.footer-grid nav { display: grid; justify-items: end; gap: 8px; }
.footer-grid nav a { color: #dce6ff; font-size: .9rem; }

.modal { width: min(920px, calc(100% - 34px)); max-height: min(86vh, 900px); padding: 0; color: var(--ink); background: #fff; border: 0; border-radius: 26px; box-shadow: 0 36px 110px rgb(14 25 57 / 36%); }
.modal::backdrop { background: rgb(13 20 43 / 68%); backdrop-filter: blur(6px); }
.modal[open] { animation: modal-in .2s ease both; }
.modal-shell { max-height: inherit; padding: 32px; overflow: auto; overscroll-behavior: contain; }
.modal-header { position: sticky; z-index: 2; top: -32px; display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin: -32px -32px 28px; padding: 28px 32px 22px; background: rgb(255 255 255 / 96%); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.modal-header h2 { margin: 0; font-size: clamp(1.65rem, 4vw, 2.65rem); }
.modal-kicker { margin: 0 0 7px; color: var(--blue); font-size: .78rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.modal-close { flex: 0 0 46px; width: 46px; height: 46px; display: grid; place-items: center; color: var(--ink); background: #f4f7fc; border: 1px solid var(--line); border-radius: 50%; font-size: 1.8rem; line-height: 1; }
.modal-lead { margin: 0 0 28px; color: var(--muted); font-size: 1.08rem; }
.platform-meta { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin: 0 0 28px; padding: 1px; background: var(--line); }
.platform-meta div { padding: 20px; background: #f8faff; }
.platform-meta dt { margin-bottom: 5px; color: var(--purple); font-size: .75rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.platform-meta dd { margin: 0; }
.modal-prose { max-width: 760px; }
.modal-prose h3 { margin: 30px 0 10px; }
.modal-prose p { margin: 0 0 16px; }
.iframe-wrap { min-height: 560px; overflow: hidden; background: #f4f7fc; border: 1px solid var(--line); border-radius: 18px; }
.iframe-wrap iframe { width: 100%; min-height: 620px; display: block; border: 0; }
.modal-fallback { margin: -8px 0 16px; color: var(--muted); font-size: .9rem; }
.modal-fallback a { color: var(--purple); font-weight: 800; }

.cookie-banner { position: fixed; z-index: 90; right: 22px; bottom: 22px; width: min(560px, calc(100% - 44px)); padding: 22px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 22px 70px rgb(15 26 58 / 24%); }
.cookie-banner[hidden] { display: none; }
.cookie-banner p { margin: 0 0 18px; color: var(--muted); }
.cookie-banner p a { color: var(--purple); }
.cookie-banner > div { display: flex; flex-wrap: wrap; gap: 10px; }

.legal-header { position: sticky; z-index: 20; top: 0; background: rgb(255 255 255 / 94%); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.legal-header .container { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.legal-header img { width: 185px; height: auto; }
.back-link { color: var(--purple); font-weight: 800; text-decoration: none; }
.legal-page { padding-block: 78px 100px; }
.legal-layout { max-width: 900px; }
.legal-layout > header { margin-bottom: 68px; }
.legal-layout h1 { max-width: 850px; font-size: clamp(2.35rem, 6vw, 4.5rem); }
.legal-intro { max-width: 780px; color: var(--muted); font-size: 1.12rem; }
.legal-layout section { padding: 34px 0; border-top: 1px solid var(--line); }
.legal-layout section h2 { margin-bottom: 20px; font-size: clamp(1.55rem, 3.5vw, 2.15rem); }
.legal-layout section p, .legal-layout section li { color: #3e475b; }
.legal-layout section p:last-child { margin-bottom: 0; }
.legal-layout a { color: var(--purple); }
.legal-footer { padding-block: 34px; color: #dce6ff; background: #101a36; }
.legal-footer .container { display: flex; flex-wrap: wrap; gap: 22px; }
.legal-footer a { color: inherit; }

@keyframes modal-in { from { opacity: 0; transform: translateY(15px) scale(.985); } }

@keyframes pulse { 50% { transform: scale(1.35); box-shadow: 0 0 0 10px rgb(78 154 236 / 8%); } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }

@media (max-width: 980px) {
  .header-inner { min-height: 74px; gap: 12px; }
  .header-organizers { flex: 1 1 auto; gap: 8px; }
  .brand { flex: 0 1 130px; }.brand img { width: 130px; }
  .header-coorganizers { gap: 8px; padding-left: 8px; }
  .header-logo--energia { height: 22px; }
  .header-logo--nskv { height: 26px; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-nav { position: absolute; top: 74px; left: 20px; right: 20px; display: none; align-items: stretch; padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); flex-direction: column; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 8px 4px; }
  .site-nav .nav-register { display: inline-flex; width: 100%; margin-top: 8px; }
  .header-inner > .button { display: none; }
  .hero-grid { grid-template-columns: 1fr; }
  .date-card { max-width: 520px; min-height: 310px; }
  .about-grid, .contacts-grid { grid-template-columns: 1fr; }
  .about-intro, .contacts-copy { position: static; }
  .speaker-list { grid-template-columns: 1fr; }
  .room-grid { grid-template-columns: 1fr; }
  .room-card { min-height: auto; }
  .platform-card { grid-column: span 6; }
  .platform-card:nth-child(4), .platform-card:nth-child(5) { grid-column: span 6; }
  .footer-grid { grid-template-columns: 190px 1fr; }
  .footer-grid nav { grid-column: 1 / -1; justify-items: start; grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  :root { --container: min(100% - 28px, 1180px); }
  .hero { min-height: auto; }
  .hero-grid { gap: 44px; padding-block: 62px; }
  h1 { font-size: clamp(2.35rem, 12vw, 3.5rem); }
  .date-card { min-height: 285px; padding: 32px; border-radius: 28px 64px 28px 28px; }
  .announcement-grid { grid-template-columns: 1fr; gap: 30px; padding-block: 56px; }
  .announcement-details { padding: 28px 0 0; border-top: 1px solid rgb(255 255 255 / 36%); border-left: 0; }
  .section { padding-block: 74px; }
  .timeline-card { grid-template-columns: 1fr; gap: 14px; padding: 24px; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; margin-bottom: 38px; }
  .about-points { grid-template-columns: 1fr; }
  .about-points article { min-height: auto; }
  .about-points h3 { margin-top: 32px; }
  .timeline::before { left: 11px; }
  .timeline-item { grid-template-columns: 1fr; gap: 12px; padding-left: 35px; padding-bottom: 28px; }
  .timeline-item::before { top: 8px; left: 3px; }
  .timeline-time { display: flex; align-items: baseline; gap: 8px; padding-top: 0; }
  .timeline-time span::before { content: "— "; }
  .timeline-content, .timeline-item--parallel .timeline-content { padding: 24px; border-radius: 18px; }
  .timeline-item--compact .timeline-content { display: block; }
  .timeline-item--compact h3 { margin-bottom: 6px; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-card, .platform-card:nth-child(4), .platform-card:nth-child(5) { grid-column: auto; min-height: 230px; }
  .partner-grid { grid-template-columns: 1fr; }
  .partner-logo { height: 190px; }
  .partner-logo img { height: 110px; }
  .venue-grid { grid-template-columns: 1fr; gap: 46px; }
  .venue-date span { font-size: 8.5rem; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid nav { grid-column: auto; grid-template-columns: 1fr; }
  .modal { width: calc(100% - 18px); max-height: calc(100dvh - 18px); border-radius: 20px; }
  .modal-shell { padding: 22px; }
  .modal-header { top: -22px; margin: -22px -22px 24px; padding: 20px 22px 18px; }
  .platform-meta { grid-template-columns: 1fr; }
  .iframe-wrap { min-height: calc(100dvh - 225px); }
  .iframe-wrap iframe { min-height: calc(100dvh - 190px); }
  .cookie-banner { right: 10px; bottom: 10px; width: calc(100% - 20px); padding: 18px; }
  .legal-header .container { min-height: 70px; }
  .legal-header img { width: 150px; }
  .legal-page { padding-block: 56px 74px; }
  .legal-layout > header { margin-bottom: 48px; }
}

@media (max-width: 370px) {
  .header-inner { gap: 9px; }
  .header-organizers { gap: 6px; }
  .brand { flex-basis: 95px; }
  .brand img { width: 95px; }
  .header-coorganizers { gap: 5px; padding-left: 6px; }
  .header-logo--energia { height: 17px; }
  .header-logo--nskv { height: 21px; }
}

@media (max-width: 380px) {
  .brand, .brand img { width: 95px; flex-basis: 95px; }
  .menu-toggle { width: 42px; height: 42px; }
  h1 { font-size: 2.25rem; }
  .timeline-content, .timeline-item--parallel .timeline-content { padding: 20px; }
  .room-card { padding: 18px; }
  .modal-header { gap: 12px; }
  .modal-close { flex-basis: 42px; width: 42px; height: 42px; }
}