:root {
  --color-primary: #073a9b;
  --color-primary-dark: #03276f;
  --color-primary-deep: #021d55;
  --color-accent-blue: #1377e8;
  --color-accent-cyan: #11a7c4;
  --color-accent-violet: #7654d8;
  --color-text: #122357;
  --color-text-muted: #5d6b91;
  --color-background: #f7faff;
  --color-surface: #ffffff;
  --color-border: #d9e4f7;
  --color-border-strong: #b8cced;
  --color-focus: #62c8f2;
  --color-success: #0b8f72;
  --color-warning: #a96200;
  --font-heading: "Prata", Georgia, "Times New Roman", serif;
  --font-body: "Manrope", "Segoe UI", Arial, sans-serif;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 8px 24px rgba(16, 50, 116, 0.08);
  --shadow-md: 0 18px 50px rgba(16, 50, 116, 0.12);
  --shadow-card-hover: 0 22px 50px rgba(16, 50, 116, 0.15);
  --container: 1440px;
  --header-height: 84px;
  --transition: 220ms ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.cis-menu-open {
  overflow: hidden;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

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

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

::selection {
  background: rgba(19, 119, 232, 0.2);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.65em;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.7rem, 6vw, 5.8rem);
}

h2 {
  font-size: clamp(2.05rem, 4vw, 3.8rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.7rem);
}

h4 {
  font-size: clamp(1.08rem, 1.6vw, 1.35rem);
}

p {
  margin: 0 0 1.25em;
}

ul,
ol {
  margin: 0 0 1.5em;
}

.cis-container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.cis-site-main {
  min-height: 60vh;
}

.cis-section {
  position: relative;
  padding-block: clamp(72px, 8vw, 118px);
}

.cis-section--tinted {
  background: linear-gradient(180deg, #eff6ff 0%, #f8fbff 100%);
}

.cis-section--editor-content {
  padding-top: 0;
}

.cis-page-shell {
  padding-top: calc(var(--header-height) + var(--space-8));
}

.cis-prose {
  max-width: 920px;
}

.cis-prose > *:first-child {
  margin-top: 0;
}

.cis-prose > *:last-child {
  margin-bottom: 0;
}

.cis-prose p,
.cis-prose li {
  color: #34466f;
}

.cis-prose a {
  overflow-wrap: anywhere;
}

.screen-reader-text {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.screen-reader-text:focus {
  position: fixed !important;
  z-index: 100000;
  top: 10px;
  left: 10px;
  width: auto;
  height: auto;
  padding: 12px 18px;
  clip: auto;
  background: #fff;
  color: var(--color-primary-deep);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

.cis-skip-link {
  position: fixed;
  z-index: 100001;
  top: 12px;
  left: 12px;
  padding: 12px 18px;
  transform: translateY(-160%);
  border-radius: var(--radius-sm);
  background: #fff;
  box-shadow: var(--shadow-md);
  font-weight: 700;
}

.cis-skip-link:focus {
  transform: translateY(0);
}

.cis-icon {
  width: 1.25em;
  height: 1.25em;
  flex: 0 0 auto;
}

.cis-button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: transform var(--transition), background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.cis-button:hover {
  transform: translateY(-2px);
}

.cis-button--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  color: #fff;
  box-shadow: 0 14px 30px rgba(7, 58, 155, 0.22);
}

.cis-button--primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
}

.cis-button--secondary {
  border-color: var(--color-border-strong);
  background: rgba(255, 255, 255, 0.78);
  color: var(--color-primary-deep);
}

.cis-button--secondary:hover {
  border-color: var(--color-primary);
  background: #fff;
  color: var(--color-primary);
}

.cis-button--light {
  background: #fff;
  color: var(--color-primary-deep);
  box-shadow: var(--shadow-sm);
}

.cis-button--light:hover {
  background: #eef6ff;
  color: var(--color-primary);
}

.cis-text-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  text-decoration: none;
}

.cis-text-link .cis-icon {
  transition: transform var(--transition);
}

.cis-text-link:hover .cis-icon {
  transform: translateX(4px);
}

.cis-kicker,
.cis-eyebrow {
  margin-bottom: 14px;
  color: var(--color-primary);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.13em;
  line-height: 1.4;
  text-transform: uppercase;
}

.cis-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 480px);
  gap: 48px;
  align-items: end;
  margin-bottom: clamp(38px, 5vw, 66px);
}

.cis-section-heading h2 {
  margin-bottom: 0;
}

.cis-section-heading > p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1.02rem;
}

.cis-section-heading--with-controls {
  grid-template-columns: minmax(0, 1fr) auto;
}

.cis-section-footer-link {
  margin-top: 34px;
  text-align: right;
}

.cis-empty-state {
  padding: 28px;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  color: var(--color-text-muted);
}

.cis-empty-state p:last-child {
  margin-bottom: 0;
}

/* Header */
.cis-site-header {
  position: sticky;
  z-index: 1000;
  top: 0;
  min-height: var(--header-height);
  background: linear-gradient(95deg, var(--color-primary-deep), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 8px 25px rgba(2, 29, 85, 0.13);
}

.admin-bar .cis-site-header {
  top: 32px;
}

.cis-site-header__inner {
  display: grid;
  min-height: var(--header-height);
  grid-template-columns: minmax(250px, 1fr) auto auto;
  gap: 28px;
  align-items: center;
}

.cis-brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 13px;
  color: inherit;
  text-decoration: none;
}

.cis-brand:hover {
  color: inherit;
}

.cis-brand__logo-wrap {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
}

.cis-brand__logo {
  width: auto;
  max-width: 190px;
  height: 48px;
  object-fit: contain;
}

.cis-brand__mark {
  width: 48px;
  height: 48px;
}

.cis-brand__text {
  display: grid;
  min-width: 0;
  gap: 1px;
}

.cis-brand__title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  line-height: 1.15;
}

.cis-brand__caption {
  max-width: 340px;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  line-height: 1.35;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.cis-primary-menu,
.cis-footer-menu,
.cis-mobile-menu__list,
.cis-footer-organizers,
.cis-footer-contacts {
  padding: 0;
  margin: 0;
  list-style: none;
}

.cis-primary-menu {
  display: flex;
  gap: 24px;
  align-items: center;
}

.cis-primary-menu a {
  position: relative;
  display: block;
  padding-block: 8px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.8rem;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
}

.cis-primary-menu a::after {
  position: absolute;
  right: 0;
  bottom: 1px;
  left: 0;
  height: 2px;
  content: "";
  transform: scaleX(0);
  background: var(--color-accent-cyan);
  transform-origin: center;
  transition: transform var(--transition);
}

.cis-primary-menu a:hover,
.cis-primary-menu a[aria-current="page"] {
  color: #fff;
}

.cis-primary-menu a:hover::after,
.cis-primary-menu a[aria-current="page"]::after {
  transform: scaleX(1);
}

.cis-button--header {
  min-height: 44px;
  padding-inline: 17px;
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.cis-button--header:hover {
  background: #fff;
  color: var(--color-primary-deep);
}

.cis-menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 10px;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.cis-menu-toggle .cis-icon {
  width: 25px;
  height: 25px;
}

.cis-mobile-menu {
  position: fixed;
  z-index: 1100;
  inset: 0;
}

.cis-mobile-menu[hidden] {
  display: none;
}

.cis-mobile-menu__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 18, 52, 0.68);
  backdrop-filter: blur(5px);
}

.cis-mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  width: min(90vw, 410px);
  height: 100%;
  flex-direction: column;
  padding: 26px;
  overflow-y: auto;
  background: #fff;
  box-shadow: -20px 0 60px rgba(2, 29, 85, 0.26);
}

.cis-mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 26px;
}

.cis-mobile-menu__title {
  margin: 0;
  color: var(--color-primary-deep);
  font-family: var(--font-heading);
  font-size: 1.55rem;
}

.cis-mobile-menu__close {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  color: var(--color-primary-deep);
  cursor: pointer;
  place-items: center;
}

.cis-mobile-menu__list {
  display: grid;
  gap: 4px;
}

.cis-mobile-menu__list a {
  display: block;
  padding: 13px 10px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-weight: 750;
  text-decoration: none;
}

.cis-mobile-menu__cta {
  width: 100%;
  margin-top: auto;
}

/* Hero */
.cis-hero {
  position: relative;
  min-height: clamp(600px, 72vh, 740px);
  padding-block: clamp(48px, 5vw, 76px);
  background:
    radial-gradient(circle at 82% 38%, rgba(17, 167, 196, 0.15), transparent 27%),
    radial-gradient(circle at 65% 10%, rgba(118, 84, 216, 0.1), transparent 30%),
    linear-gradient(135deg, #fff 0%, #f5f9ff 52%, #edf5ff 100%);
}

.cis-hero::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(7, 58, 155, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7, 58, 155, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to right, rgba(0, 0, 0, 0.1), #000 70%);
}

.cis-hero__network {
  position: absolute;
  top: -160px;
  right: 0;
  width: min(780px, 100%);
  height: 780px;
  border: 1px solid rgba(19, 119, 232, 0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 90px rgba(19, 119, 232, 0.025), 0 0 0 180px rgba(19, 119, 232, 0.018);
}

.cis-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 520px;
  grid-template-columns: minmax(0, 0.94fr) minmax(430px, 1.06fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}

.cis-hero__content {
  min-width: 0;
  max-width: 790px;
}

.cis-hero__title {
  margin-bottom: 20px;
  color: var(--color-primary-deep);
  font-size: clamp(3.35rem, 4.8vw, 5.3rem);
  letter-spacing: -0.055em;
  line-height: 0.91;
  text-transform: uppercase;
}

.cis-hero__title-line {
  display: block;
  max-width: 100%;
  overflow-wrap: normal;
  white-space: nowrap;
}

.cis-hero__title-line:last-child {
  margin-left: 0.68em;
  color: var(--color-primary);
}

.cis-hero__lead {
  max-width: 620px;
  margin-bottom: 22px;
  color: var(--color-text-muted);
  font-size: clamp(1.02rem, 1.5vw, 1.28rem);
  line-height: 1.6;
}

.cis-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.cis-fact {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 11px;
  padding: 10px 15px;
  border: 1px solid rgba(184, 204, 237, 0.8);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(7, 58, 155, 0.05);
  backdrop-filter: blur(10px);
}

.cis-fact .cis-icon {
  color: var(--color-accent-blue);
}

.cis-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}

.cis-hero__registration-note {
  max-width: 620px;
  margin-top: 16px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.cis-empty-state--hero {
  max-width: 620px;
  margin-top: 30px;
}

.cis-hero__visual {
  position: relative;
  width: min(100%, 700px);
  min-width: 0;
  justify-self: end;
}

.cis-hero__visual > img {
  width: 100%;
  filter: drop-shadow(0 32px 45px rgba(7, 58, 155, 0.13));
}

.cis-hero-orbit {
  position: absolute;
  display: grid;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--color-primary);
  box-shadow: 0 18px 36px rgba(7, 58, 155, 0.14);
  backdrop-filter: blur(12px);
  place-items: center;
  animation: cis-float 7s ease-in-out infinite;
}

.cis-hero-orbit .cis-icon {
  width: 30px;
  height: 30px;
}

.cis-hero-orbit--one {
  top: 14%;
  left: 3%;
}

.cis-hero-orbit--two {
  right: 4%;
  bottom: 13%;
  animation-delay: -2.5s;
}

.cis-hero-orbit--three {
  right: 3%;
  top: 27%;
  animation-delay: -4.5s;
}

@keyframes cis-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Footer */
.cis-site-footer {
  padding-block: 72px 32px;
  background:
    radial-gradient(circle at 80% 15%, rgba(17, 167, 196, 0.14), transparent 25%),
    var(--color-primary-deep);
  color: rgba(255, 255, 255, 0.72);
}

.cis-site-footer__grid {
  display: grid;
  grid-template-columns: minmax(250px, 1.35fr) 0.7fr 1fr 0.9fr;
  gap: 54px;
}

.cis-brand--footer {
  margin-bottom: 22px;
  color: #fff;
}

.cis-brand__logo--footer,
.cis-brand--footer .cis-brand__mark {
  filter: brightness(0) invert(1);
}

.cis-site-footer__brand p {
  max-width: 420px;
}

.cis-site-footer__title {
  margin-bottom: 20px;
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.cis-footer-menu,
.cis-footer-organizers,
.cis-footer-contacts {
  display: grid;
  gap: 11px;
}

.cis-footer-menu a,
.cis-footer-organizers a,
.cis-footer-contacts a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
}

.cis-footer-menu a:hover,
.cis-footer-organizers a:hover,
.cis-footer-contacts a:hover {
  color: #fff;
}

.cis-footer-organizers {
  font-size: 0.86rem;
  line-height: 1.45;
}

.cis-footer-contacts li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
}

.cis-site-footer__copyright {
  margin-top: 28px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 0.78rem;
}

/* Breadcrumbs and section hero */
.cis-section-page__breadcrumbs-wrap {
  padding-block: 18px;
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}

.cis-breadcrumbs {
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.cis-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cis-breadcrumbs li:not(:last-child)::after {
  margin-inline-start: 8px;
  content: "/";
  color: var(--color-border-strong);
}

.cis-breadcrumbs a {
  text-decoration: none;
}

.cis-section-hero {
  position: relative;
  padding-block: clamp(54px, 6vw, 86px);
  overflow: clip;
  background:
    radial-gradient(circle at 80% 35%, rgba(17, 167, 196, 0.18), transparent 28%),
    linear-gradient(135deg, #f9fbff, #edf5ff);
}

.cis-section-hero__network {
  position: absolute;
  right: -180px;
  bottom: -350px;
  width: 700px;
  height: 700px;
  border: 1px solid rgba(7, 58, 155, 0.12);
  border-radius: 50%;
  box-shadow: 0 0 0 90px rgba(7, 58, 155, 0.025), 0 0 0 180px rgba(7, 58, 155, 0.018);
}

.cis-section-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: center;
}

.cis-section-hero__content {
  min-width: 0;
  max-width: 880px;
}

.cis-section-hero__meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.cis-section-hero__meta-line span {
  padding: 7px 11px;
  border: 1px solid var(--color-border-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cis-section-hero__title {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(2.75rem, 4vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  overflow-wrap: normal;
  word-break: normal;
  text-wrap: balance;
}

.cis-section-hero__lead {
  max-width: 800px;
  color: var(--color-text-muted);
  font-size: 1.08rem;
}

.cis-section-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cis-section-hero__visual {
  position: relative;
  min-width: 0;
}

.cis-section-hero__visual img {
  width: 100%;
  max-height: 410px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  filter: drop-shadow(0 25px 45px rgba(7, 58, 155, 0.13));
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}


#section-about,
#section-questions,
#section-moderators,
#section-co-moderators,
#section-speakers,
#contacts {
  scroll-margin-top: calc(var(--header-height) + 24px);
}