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

:root {
  color-scheme: dark;
  --bg: #0b0f17;
  --block: rgba(18, 24, 38, 0.72);
  --block-border: rgba(255, 255, 255, 0.08);
  --text: #eef2f8;
  --muted: #8b97ab;
  --accent: #4ecdc4;
  --accent-soft: rgba(78, 205, 196, 0.14);
  --accent-glow: rgba(78, 205, 196, 0.35);
  --violet: #7c6cff;
  --violet-soft: rgba(124, 108, 255, 0.18);
  --gold: #e8c468;
  --gold-soft: rgba(232, 196, 104, 0.12);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", system-ui, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

/* Background */

.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
}

.orb-1 {
  width: 28rem;
  height: 28rem;
  top: -8rem;
  right: -6rem;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  animation: drift 18s ease-in-out infinite alternate;
}

.orb-2 {
  width: 24rem;
  height: 24rem;
  bottom: -6rem;
  left: -8rem;
  background: radial-gradient(circle, var(--violet-soft), transparent 70%);
  animation: drift 22s ease-in-out infinite alternate-reverse;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 100%);
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-2rem, 1.5rem) scale(1.08); }
}

/* Page layout */

.page {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fade-up 0.7s ease both;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(1.25rem); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Shared block */

.block {
  padding: 1.75rem 1.5rem;
  border-radius: 20px;
  border: 1px solid var(--block-border);
  background: var(--block);
  backdrop-filter: blur(24px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.block-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.block-num {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
  opacity: 0.7;
}

h2 {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.block-lead {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
}

.block-note {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

/* Hero */

.hero {
  padding: 2rem 1.5rem;
  background: linear-gradient(145deg, rgba(78, 205, 196, 0.1) 0%, rgba(124, 108, 255, 0.08) 100%), var(--block);
}

.hero-profile {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.avatar {
  position: relative;
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
}

.avatar span {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(145deg, #1e2a42, #121a2b);
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.avatar-ring {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, var(--accent), var(--violet), var(--accent));
  opacity: 0.7;
  animation: spin 12s linear infinite;
}

.avatar-ring::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: #121a2b;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.badge {
  margin: 0 0 0.5rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
}

.name-line {
  display: block;
}

.name-line.accent {
  background: linear-gradient(90deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.role {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-contacts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.contact-chip {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.85rem 1rem;
  text-decoration: none;
  color: inherit;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  transition: border-color 0.2s, background 0.2s;
}

.contact-chip:hover {
  background: var(--accent-soft);
  border-color: rgba(78, 205, 196, 0.3);
}

.chip-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.chip-value {
  font-size: 0.88rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

/* Expertise */

.expertise-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.expertise-list li {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(78, 205, 196, 0.2);
  border-radius: 999px;
}

/* Talks */

.talks-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.talks-list li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.2s;
}

.talks-list li:hover {
  background: rgba(255, 255, 255, 0.05);
}

.talk-year {
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.talk-title {
  font-size: 0.9rem;
  color: #c5cedd;
  line-height: 1.45;
}

.talks-collapse {
  margin-top: 0.75rem;
}

.talks-collapse summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  list-style: none;
  cursor: pointer;
  border-radius: 10px;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.02);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  user-select: none;
}

.talks-collapse summary::-webkit-details-marker {
  display: none;
}

.talks-collapse summary::before {
  content: "";
  flex-shrink: 0;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.2s;
  margin-right: 0.15rem;
}

.talks-collapse[open] summary::before {
  transform: rotate(45deg);
}

.talks-collapse summary:hover {
  color: var(--accent);
  border-color: rgba(78, 205, 196, 0.3);
  background: var(--accent-soft);
}

.talks-list--older {
  margin-top: 0.5rem;
}

/* Award */

.block-award {
  background: linear-gradient(135deg, var(--gold-soft) 0%, rgba(18, 24, 38, 0.72) 60%);
  border-color: rgba(232, 196, 104, 0.2);
}

.award-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.award-badge {
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold);
  background: var(--gold-soft);
  border: 1px solid rgba(232, 196, 104, 0.25);
  border-radius: 14px;
}

.award-badge svg {
  width: 2rem;
  height: 2rem;
}

.award-title {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gold);
}

.award-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.55;
}

/* Software */

.block-software {
  border-color: rgba(78, 205, 196, 0.2);
  background: linear-gradient(160deg, var(--accent-soft) 0%, var(--block) 50%);
}

.software-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.software-card h3 a {
  color: var(--accent);
  text-decoration: none;
}

.software-card h3 a:hover {
  text-decoration: underline;
}

.software-card p {
  margin: 0;
  font-size: 0.95rem;
  color: #c5cedd;
  line-height: 1.6;
}

/* Navigation */

.back-nav {
  margin-bottom: -0.25rem;
}

.back-nav a {
  display: inline-flex;
  align-items: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Iris page */

.iris-hero {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.iris-title {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.iris-subtitle {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
}

.iris-text {
  font-size: 1rem;
  line-height: 1.65;
  color: #c5cedd;
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.feature-list li {
  position: relative;
  padding: 0.75rem 1rem 0.75rem 2.25rem;
  font-size: 0.92rem;
  color: #c5cedd;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.15rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.registry-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: inherit;
  background: var(--accent-soft);
  border: 1px solid rgba(78, 205, 196, 0.25);
  border-radius: 12px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.registry-link:hover {
  background: rgba(78, 205, 196, 0.2);
  border-color: rgba(78, 205, 196, 0.45);
  transform: translateY(-1px);
}

.registry-link-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

.registry-link-id {
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.legal a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Footer */

.legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding: 0.5rem 0.25rem;
}

.legal-item {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.legal-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.legal-value {
  font-size: 0.88rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: #b8c2d4;
}

/* Responsive */

@media (max-width: 520px) {
  .page {
    padding: 1.25rem 1rem 2rem;
  }

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

  .hero-contacts {
    grid-template-columns: 1fr;
  }

  .talks-list li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .award-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}