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

/* Dark theme (default) */
:root,
[data-theme="dark"] {
  --bg: #07071a;
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.1);
  --btn-bg: rgba(255, 255, 255, 0.06);
  --btn-hover: rgba(255, 255, 255, 0.12);
  --btn-border: rgba(255, 255, 255, 0.07);
  --btn-border-hover: rgba(255, 255, 255, 0.15);
  --text: #f0f0f7;
  --text-muted: #8888aa;
  --orb-1-color: #4f46e5;
  --orb-2-color: #7c3aed;
  --orb-opacity: 0.3;
  --toggle-icon: "☾";
}

/* Light theme */
[data-theme="light"] {
  --bg: #ededf5;
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-border: rgba(0, 0, 0, 0.08);
  --btn-bg: rgba(0, 0, 0, 0.04);
  --btn-hover: rgba(0, 0, 0, 0.09);
  --btn-border: rgba(0, 0, 0, 0.07);
  --btn-border-hover: rgba(0, 0, 0, 0.16);
  --text: #18182e;
  --text-muted: #55556a;
  --orb-1-color: #6366f1;
  --orb-2-color: #8b5cf6;
  --orb-opacity: 0.45;
}

body {
  min-height: 100dvh;
  background: var(--bg);
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.bg-orbs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(130px);
  opacity: var(--orb-opacity);
  transition: opacity 0.4s ease, background 0.4s ease;
}

.orb-1 {
  width: 650px;
  height: 650px;
  background: var(--orb-1-color);
  top: -220px;
  left: -150px;
  animation: orbFloat1 24s ease-in-out infinite;
}

.orb-2 {
  width: 550px;
  height: 550px;
  background: var(--orb-2-color);
  bottom: -180px;
  right: -120px;
  animation: orbFloat2 30s ease-in-out infinite;
}

main {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  padding: 24px 16px;
}

.card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 44px 36px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.35);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Theme toggle button */
.theme-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.15s ease;
  line-height: 1;
}

.theme-toggle:hover {
  background: var(--btn-hover);
  border-color: var(--btn-border-hover);
  transform: scale(1.1);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--card-border);
  margin-bottom: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: border-color 0.3s ease;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 8px;
}

.bio {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  text-align: center;
  font-weight: 400;
  transition: color 0.3s ease;
}

.links {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 20px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  transition:
    background 0.18s ease,
    border-color 0.18s ease,
    transform 0.15s ease;
}

.link-btn:hover {
  background: var(--btn-hover);
  border-color: var(--btn-border-hover);
  transform: translateY(-2px);
}

.link-btn:active {
  transform: translateY(0);
}


.btn-logo {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex-shrink: 0;
  transition: filter 0.3s ease;
}

@media (max-width: 480px) {
  .card {
    padding: 36px 24px;
    border-radius: 20px;
  }

  h1 {
    font-size: 1.35rem;
  }
}

@keyframes orbFloat1 {
  0%   { transform: translate(0,     0); }
  20%  { transform: translate(140px, 100px); }
  40%  { transform: translate(80px,  220px); }
  60%  { transform: translate(200px, 140px); }
  80%  { transform: translate(100px,  60px); }
  100% { transform: translate(0,     0); }
}

@keyframes orbFloat2 {
  0%   { transform: translate(0,      0); }
  20%  { transform: translate(-120px, -80px); }
  40%  { transform: translate(-200px, -160px); }
  60%  { transform: translate(-80px,  -200px); }
  80%  { transform: translate(-160px, -100px); }
  100% { transform: translate(0,      0); }
}