:root {
  --vk-ink: #1f2933;
  --vk-muted: #5c6670;
  --vk-accent: #2364aa;
  --vk-accent-dark: #173f6f;
  --vk-soft: #eef6fb;
  --vk-warm: #fff7ed;
  --vk-border: #d7e2ea;
  --vk-card: #ffffff;
}

body {
  color: var(--vk-ink);
  background:
    linear-gradient(180deg, rgba(238, 246, 251, 0.75), rgba(255, 255, 255, 0) 360px),
    #ffffff;
}

.navbar {
  box-shadow: 0 2px 18px rgba(31, 41, 51, 0.08);
}

.navbar-brand {
  font-weight: 700;
  letter-spacing: 0;
}

.content {
  font-size: 1.05rem;
  line-height: 1.7;
}

h1,
h2,
h3 {
  color: var(--vk-ink);
  letter-spacing: 0;
}

h1 {
  font-weight: 800;
}

h2 {
  margin-top: 2.25rem;
  font-weight: 750;
}

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

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

.hero {
  margin: 1.5rem 0 2.5rem;
  padding: clamp(1.25rem, 3vw, 2.5rem);
  border: 1px solid var(--vk-border);
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff 0%, var(--vk-soft) 64%, var(--vk-warm) 100%);
}

.hero-grid {
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  column-gap: clamp(1.75rem, 5vw, 4rem);
}

.hero .column:first-child {
  padding-right: clamp(1rem, 3vw, 2.5rem);
}

.hero .column:last-child {
  padding-left: clamp(0.75rem, 2vw, 1.5rem);
}

.hero h3 {
  margin-top: 0;
  color: var(--vk-accent-dark);
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.hero p {
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.profile-photo {
  width: min(100%, 320px);
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 18px 38px rgba(31, 41, 51, 0.18);
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.btn {
  border-radius: 6px;
  font-weight: 650;
}

.btn-primary {
  background-color: var(--vk-accent);
  border-color: var(--vk-accent);
}

.btn-primary:hover {
  background-color: var(--vk-accent-dark);
  border-color: var(--vk-accent-dark);
}

.intro {
  max-width: 820px;
  margin: 0 0 2rem;
  color: var(--vk-muted);
  font-size: 1.14rem;
}

.section-band {
  margin: 2.5rem 0;
  padding: clamp(1rem, 2.5vw, 1.75rem);
  border-left: 5px solid var(--vk-accent);
  background: var(--vk-soft);
  border-radius: 8px;
}

.section-band h2 {
  margin-top: 0;
}

.highlight-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.highlight-card,
.contact-card {
  min-height: 100%;
  padding: 1.1rem;
  border: 1px solid var(--vk-border);
  border-radius: 8px;
  background: var(--vk-card);
  box-shadow: 0 10px 24px rgba(31, 41, 51, 0.06);
}

.highlight-card h3,
.contact-card h3 {
  margin-top: 0;
  color: var(--vk-accent-dark);
  font-size: 1.08rem;
}

.highlight-list {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.25rem;
}

.highlight-item {
  padding: 1rem 1.1rem;
  border: 1px solid var(--vk-border);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(31, 41, 51, 0.06);
}

.highlight-item h3 {
  margin-top: 0;
  color: var(--vk-accent-dark);
  font-size: 1.08rem;
}

.highlight-item summary {
  cursor: pointer;
  color: var(--vk-accent-dark);
  font-size: 1.08rem;
  font-weight: 750;
}

.highlight-item summary::marker {
  color: var(--vk-accent);
}

.highlight-item[open] summary {
  margin-bottom: 0.75rem;
}

.highlight-item ul {
  margin-bottom: 0;
}

.course-list ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.9rem;
  padding-left: 0;
}

.course-list li {
  list-style: none;
  padding: 1rem;
  border: 1px solid var(--vk-border);
  border-radius: 8px;
  background: #ffffff;
}

.timeline-list {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0 2rem;
}

.timeline-item {
  padding: 1.1rem 1.2rem;
  border-left: 4px solid var(--vk-accent);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(31, 41, 51, 0.06);
}

.timeline-item h3 {
  margin-top: 0;
  color: var(--vk-accent-dark);
}

.map-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  margin-top: 1rem;
  border: 1px solid var(--vk-border);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(31, 41, 51, 0.08);
}

.map-frame iframe {
  display: block;
  width: 100%;
  min-height: 360px;
}

@media (max-width: 767px) {
  .hero {
    text-align: left;
  }

  .hero .column:first-child,
  .hero .column:last-child {
    padding-left: 0;
    padding-right: 0;
  }

  .profile-photo {
    width: min(100%, 260px);
    margin-bottom: 1rem;
  }
}