:root {
  --primary-color: #6200ee;
  --secondary-color: #03dac6;
  --background-color: #f8f9fa;
  --text-color: #333;
  --header-bg: #6200ee;
  --header-text: #ffffff;
  --card-bg: #ffffff;
  --border-color: #e0e0e0;
  --success-color: #4caf50;
  --danger-color: #f44336;
  --warning-color: #ffc107;
}

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

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background-color: var(--header-bg);
  color: var(--header-text);
  padding: 1.5rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
  font-weight: 700;
  font-size: 1.8rem;
  text-decoration: none;
  color: var(--header-text);
}

.header-actions a {
  color: var(--header-text);
  text-decoration: none;
  margin-left: 15px;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.header-actions a:hover {
  opacity: 1;
}

main {
  padding: 2rem 0;
}

.section-header {
  margin-bottom: 2rem;
  text-align: center;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.section-subtitle {
  color: #666;
  font-size: 1rem;
}

.messages-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.message-card {
  background-color: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.message-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.unread-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  background-color: var(--primary-color);
  color: white;
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.5rem;
  background-color: rgba(98, 0, 238, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.sender-info h3 {
  margin-bottom: 0.2rem;
  font-size: 1.2rem;
  color: var(--primary-color);
}

.sender-info p {
  margin: 0;
  font-size: 0.9rem;
  color: #666;
}

.message-date {
  font-size: 0.8rem;
  color: #999;
}

.message-content {
  padding: 1.5rem;
}

.message-text {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  line-height: 1.7;
}

.message-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.message-actions button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: "Poppins", sans-serif;
  font-size: 0.85rem;
  transition: background-color 0.3s, transform 0.2s;
}

.message-actions button:hover {
  transform: translateY(-2px);
}

.mark-btn {
  background-color: var(--secondary-color);
  color: #006a60;
}

.reply-btn {
  background-color: var(--primary-color);
  color: white;
}

.delete-btn {
  background-color: #ffebee;
  color: var(--danger-color);
}

.mark-btn:hover {
  background-color: #02c4b0;
}

.reply-btn:hover {
  background-color: #5600e0;
}

.delete-btn:hover {
  background-color: #ffe0e0;
}

.pagination {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
  gap: 5px;
}

.pagination-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background-color: white;
  cursor: pointer;
  font-family: "Poppins", sans-serif;
  transition: all 0.3s;
}

.pagination-btn:hover,
.pagination-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.no-messages {
  text-align: center;
  padding: 3rem;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.no-messages i {
  font-size: 3rem;
  color: #ccc;
  margin-bottom: 1rem;
}

.no-messages h3 {
  color: #666;
  margin-bottom: 0.5rem;
}

.no-messages p {
  color: #999;
}

@media (max-width: 768px) {
  .message-header {
    flex-direction: column;
    gap: 10px;
  }

  .message-date {
    margin-top: 5px;
  }

  .message-actions {
    flex-wrap: wrap;
  }
}