:root {
  --bg-color-dark: #2B2E35;
  --text-color-dark: #FFFFFF;
  --accent-1-dark: #E2EAF8;
  --accent-2-dark: #7198D8;
  --card-bg-dark: #1e2127;
  --bg-color-light: #FFFFFF;
  --text-color-light: #2B2E35;
  --accent-1-light: #E2EAF8;
  --accent-2-light: #7198D8;
  --card-bg-light: #f9f9f9;
  --border-color: #ccc;
}

.theme-dark {
  --bg-color: var(--bg-color-dark);
  --text-color: var(--text-color-dark);
  --accent-1: var(--accent-1-dark);
  --accent-2: var(--accent-2-dark);
  --card-bg: var(--card-bg-dark);
}

.theme-light {
  --bg-color: var(--bg-color-light);
  --text-color: var(--text-color-light);
  --accent-1: var(--accent-1-light);
  --accent-2: var(--accent-2-light);
  --card-bg: var(--card-bg-light);
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s, color 0.3s;
}

header {
  background: linear-gradient(to right, var(--accent-2), #4a6faa);
  color: white;
  padding: 1rem;
  text-align: center;
  position: relative;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid white;
  margin: auto;
  display: block;
  margin-top: 1rem;
  position: relative;
  z-index: 2;
}

.profile-name {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0.3rem 0;
}

.profile-username {
  font-size: 0.9rem;
  opacity: 0.9;
}

.edit-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
}

header h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.followers-following {
  display: flex;
  justify-content: space-around;
  margin: 1rem 0;
}

.followers-following div {
  text-align: center;
}

.followers-following strong {
  font-size: 1.2rem;
}

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

.action-btn {
  background-color: rgba(255, 255, 255, 0.3);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

main {
  padding: 1rem;
  max-width: 700px;
  margin: 0 auto;
}

.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.activity-stats {
  display: flex;
  justify-content: space-around;
  margin-top: 1rem;
}

.stat-item {
  text-align: center;
}

.chart-container {
  margin-top: 1rem;
  height: 200px;
}

canvas {
  width: 100% !important;
  height: 100px !important;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.achievement {
  text-align: center;
}

.achievement img {
  width: 50px;
  height: 50px;
  margin-bottom: 0.3rem;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  display: flex;
  justify-content: space-around;
  padding: 0.5rem 0;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
  padding-bottom: max(10px, env(safe-area-inset-bottom));
}

.nav-link {
  color: var(--text-color);
  text-align: center;
  font-size: 0.8rem;
}

.nav-icon {
  font-size: 1.2rem;
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.theme-light .modal {
  background-color: rgba(255, 255, 255, 0.9);
}

.modal-content {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 1.5rem;
  cursor: pointer;
}

input[type="text"],
select {
  width: 100%;
  padding: 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 1rem;
  background: var(--card-bg);
  color: var(--text-color);
}

.modal-save {
  width: 100%;
  padding: 0.6rem;
  background: var(--accent-2);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

#loader {
  text-align: center;
  margin-top: 20px;
}