:root {
  --bg-color: #0f172a;
  --card-color: rgba(15, 23, 42, 0.9);
  --text-color: #f8fafc;
  --muted-color: #cbd5e1;
  --accent-color: #38bdf8;
  --link-color: rgba(255, 255, 255, 0.08);
  --link-hover: rgba(56, 189, 248, 0.18);
  --border-color: rgba(255, 255, 255, 0.16);
}

body.light {
  --bg-color: #f1f5f9;
  --card-color: #ffffff;
  --text-color: #0f172a;
  --muted-color: #475569;
  --accent-color: #0284c7;
  --link-color: #f8fafc;
  --link-hover: #e0f2fe;
  --border-color: #e2e8f0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.25), transparent 35%),
    radial-gradient(circle at bottom right, rgba(99, 102, 241, 0.25), transparent 35%),
    var(--bg-color);
  color: var(--text-color);
  transition: background 0.3s ease, color 0.3s ease;
}

.container {
  width: 100%;
  min-height: 100vh;
  padding: 32px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-card {
  position: relative;
  width: 100%;
  max-width: 430px;
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  border-radius: 28px;
  background: var(--card-color);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
  text-align: center;
}

.theme-toggle {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: var(--link-color);
  color: var(--text-color);
  cursor: pointer;
  font-size: 18px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.theme-toggle:hover {
  transform: scale(1.08);
  background: var(--link-hover);
}

.avatar {
  width: 112px;
  height: 112px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--accent-color);
  margin-bottom: 18px;
}

h1 {
  font-size: 28px;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--muted-color);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 18px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}

.tags span {
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--link-color);
  color: var(--muted-color);
  font-size: 12px;
  border: 1px solid var(--border-color);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border-radius: 16px;
  background: var(--link-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.link-card span {
  font-size: 22px;
}

.link-card:hover {
  transform: translateY(-3px);
  background: var(--link-hover);
  border-color: var(--accent-color);
}

.share-button {
  width: 100%;
  margin-top: 24px;
  padding: 14px 18px;
  border: none;
  border-radius: 16px;
  background: var(--accent-color);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.share-button:hover {
  transform: translateY(-2px);
  opacity: 0.9;
}

.copy-message {
  min-height: 20px;
  margin-top: 12px;
  font-size: 14px;
  color: var(--accent-color);
}

@media (max-width: 480px) {
  .profile-card {
    padding: 28px 18px;
  }

  h1 {
    font-size: 24px;
  }

  .subtitle {
    font-size: 14px;
  }
}