/* CSS Variables for Theme */
: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);
}

[data-theme="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;
}

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

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 1rem;
}

/* Header */
.header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.github-icon {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
}

.sun-icon,
.moon-icon {
  width: 1.2rem;
  height: 1.2rem;
  color: var(--text-primary);
  position: absolute;
  transition: all 0.3s ease;
}

[data-theme="light"] .sun-icon {
  transform: rotate(0deg) scale(1);
}

[data-theme="light"] .moon-icon {
  transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .sun-icon {
  transform: rotate(-90deg) scale(0);
}

[data-theme="dark"] .moon-icon {
  transform: rotate(0deg) scale(1);
}

/* Main Content */
.main {
  padding: 2rem 0;
}

/* Search Section */
.search-section {
  max-width: 42rem;
  margin: 0 auto 2rem;
}

.search-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-input-group {
  display: flex;
  gap: 0.5rem;
}

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(34 197 94 / 0.1);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-button {
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.search-button:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.search-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.search-icon {
  width: 1rem;
  height: 1rem;
}

/* Error Message */
.error-message {
  max-width: 42rem;
  margin: 0 auto 2rem;
}

.error-content {
  background-color: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error);
  border-radius: 0.5rem;
  padding: 1rem;
  font-weight: 500;
}

/* Loading State */
.loading-state {
  max-width: 42rem;
  margin: 0 auto 2rem;
}

.loading-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
}

.loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--border);
  border-top: 2px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* User Card */
.user-card {
  max-width: 42rem;
  margin: 0 auto 2rem;
}

.user-card-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.user-avatar {
  display: flex;
  justify-content: center;
}

.avatar {
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.user-details {
  flex: 1;
  text-align: center;
}

.user-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.user-username {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 1rem;
  display: inline-block;
}

.user-username:hover {
  text-decoration: underline;
}

.user-bio {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-style: italic;
}

.user-stats {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.stat-badge {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.stat-number {
  font-weight: 700;
  color: var(--text-primary);
}

.user-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.meta-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.meta-link {
  color: var(--primary);
  text-decoration: none;
}

.meta-link:hover {
  text-decoration: underline;
}

/* Welcome Message */
.welcome-message {
  max-width: 42rem;
  margin: 0 auto;
  text-align: center;
}

.welcome-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.welcome-icon {
  width: 4rem;
  height: 4rem;
  color: var(--text-muted);
  margin: 0 auto 1rem;
}

.welcome-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.welcome-card p {
  color: var(--text-secondary);
}

/* Utility Classes */
.hidden {
  display: none !important;
}

/* Responsive Design */
@media (min-width: 640px) {
  .user-info {
    flex-direction: row;
    text-align: left;
  }

  .user-avatar {
    justify-content: flex-start;
  }

  .avatar {
    width: 8rem;
    height: 8rem;
  }

  .user-details {
    text-align: left;
  }

  .user-stats {
    justify-content: flex-start;
  }

  .meta-item {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .search-input-group {
    flex-direction: column;
  }

  .search-button {
    justify-content: center;
  }

  .user-stats {
    gap: 0.5rem;
  }

  .stat-badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.5rem;
  }
}