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

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --primary: #22c55e;
  --primary-hover: #16a34a;
  --error: #ef4444;
  --error-bg: #fef2f2;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
}

.dark {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border: #334155;
  --primary: #22c55e;
  --primary-hover: #16a34a;
  --error: #ef4444;
  --error-bg: #1f1415;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}
.header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.github-icon {
  max-width: 32px;
  max-height: 32px;
  width: 100%;
  height: 100%;
  color: var(--primary);
}
.logo h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.sun-icon,
.moon-icon {
  max-width: 19.2px;
  max-height: 19.2px;
  width: 100%;
  height: 100%;
  color: var(--text-primary);
  position: absolute;
  transition: all 0.3s ease;
}
.sun-icon {
  transform: rotate(0deg) scale(1);
}
.moon-icon {
  transform: rotate(90deg) scale(0);
}
.dark .sun-icon {
  transform: rotate(90deg) scale(0);
}
.dark .moon-icon {
  transform: rotate(0deg) scale(1);
}
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  max-width: 40px;
  min-height: 40px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.main {
  padding: 32px 0;
}
.search-section {
  max-width: 672px;
  margin: 0 auto 32px;
}
.search-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.search-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.search__input-group {
  display: flex;
  gap: 8px;
}
.search-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.search-input::placeholder {
  color: var(--text-muted);
}
.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(34 197 94 / 0.1);
}
.search-button {
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.search-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.search-icon {
  max-width: 16px;
  max-height: 16px;
  width: 100%;
  height: 100%;
}
.search-button:hover:not(:disabled) {
  background-color: var(--primary-hover);
}
.hidden {
  display: none !important;
}
.error-message {
  max-width: 672px;
  margin: 0 auto 32px;
}
.error-content {
  background-color: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error);
  border-radius: 8px;
  padding: 16px;
  font-weight: 500;
}
.loading-state {
  max-width: 672px;
  margin: 0 auto 32px;
}
.loading-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow);
}
.loading-spinner {
  max-width: 32px;
  min-height: 32px;
  border: 2px solid var(--border);
  border-top: 2px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}
input:-webkit-autofill {
  -webkit-text-fill-color: var(--text-primary) !important;
  transition: background-color 9999s ease-in-out 0s !important;
  -webkit-box-shadow: 0 0 0px 1000px var(--bg-primary) inset !important;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.user-card {
  max-width: 672px;
  margin: 0 auto 32px;
}
.user-card-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.user-info {
  flex-direction: row;
  text-align: left;
  display: flex;
  gap: 24px;
}
.user-avatar {
  display: flex;
  justify-content: flex-start;
}
.avatar {
  max-width: 128px;
  max-height: 128px;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}
.user-details {
  flex: 1;
  text-align: start;
}
.user-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.user-username {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 16px;
  display: inline-block;
}
.user-bio {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-style: italic;
}
.user-stats {
  display: flex;
  justify-content: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.stat-badge {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
}
.stat-number {
  font-weight: 700;
  color: var(--text-primary);
}
.user-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.meta-item {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
}
.welcome-message {
  max-width: 672px;
  margin: 0 auto;
  text-align: center;
}

.welcome-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.welcome-card h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.welcome-icon {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  margin: 0 auto 16px;
}

@media (max-width: 480px) {
  .search__input-group {
    flex-direction: column;
  }
  .search-button {
    justify-content: center;
  }
  .user-info {
    flex-direction: column;
    align-items: center;
  }
  .avatar {
    max-width: 96px;
    max-height: 96px;
  }
  .user-details {
    text-align: center;
  }
  .user-stats {
    gap: 8px;
  }
  .stat-badge {
    font-size: 12px;
    padding: 6px 8px;
  }
  .meta-item {
    justify-content: center;
  }
}