@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');
/* Global Styles & Resets */
*,
*::before,
*::after {
  box-sizing: border-box;
}



:root {
  --primary-purple: #6d28d9;
  --light-purple: #8b5cf6;
  --dark-purple: #5b21b6;
  --light-grey: #f3f4f6;
  --medium-grey: #e5e7eb;
  --dark-grey: #4b5563;
  --text-light: #ffffff;
  --text-dark: #1f2937;
  --border-radius: 12px;
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background-color: #ffffff;
  color: var(--text-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; /* Prevent horizontal scrolling */
}

/* App Container */
#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  width: 100%;
  box-sizing: border-box;
}

#app-main {
  width: 100%;
  max-width: 1400px;
  padding: 0 2rem;
  margin-bottom: 2rem;
}

/* Header */
.app-header {
  width: 100%;
  max-width: 1400px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  box-sizing: border-box;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--dark-grey);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--primary-purple);
}

/* Hero Section */
.hero-section {
  width: 100%;
  /* max-width is handled by app-main */
  background-color: var(--primary-purple);
  color: var(--text-light);
  padding: 4rem 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  margin-bottom: 2rem;
  box-sizing: border-box;
}

.hero-section h1 {
  font-size: 2.5rem;
  margin-top: 0;
  margin-bottom: 1rem;
}

.hero-section p {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

.input-group {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.input-wrapper {
  position: relative;
  display: flex;
  flex: 1;
  max-width: 400px;
}

.email-input {
  flex: 1;
  /* top, right, bottom, left */
  padding: 0.75rem 3rem 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 1rem;
  width: 100%;
}

.btn-copy {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--dark-grey);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: 6px;
}

.btn-copy:hover {
  background-color: var(--medium-grey);
}

.btn-copy span {
  color: var(--primary-purple);
  font-weight: bold;
}

.email-input:focus {
  outline: none;
  border-color: var(--light-purple);
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-primary {
  background-color: var(--light-purple);
  color: var(--text-light);
}

.btn-primary:hover {
  background-color: var(--dark-purple);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--text-light);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.btn-danger {
  background-color: #ef4444; /* a nice red */
  color: var(--text-light);
}

.btn-danger:hover {
  background-color: #dc2626; /* a darker red */
}

/* Inbox Section */
.inbox-section {
  width: 100%;
  /* max-width is handled by app-main */
  background-color: var(--light-grey);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  box-sizing: border-box;
}

.inbox-container {
  display: flex;
  gap: 1.5rem;
  min-height: 400px;
}

.message-list {
  width: 35%;
  background-color: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-sizing: border-box;
}

.message-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.message-list-header h2 {
    margin: 0;
    font-size: 1.25rem;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.header-actions button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--dark-grey);
    padding: 0.25rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.header-actions button:hover:not(:disabled) {
    background-color: var(--medium-grey);
    color: var(--primary-purple);
}

.header-actions button:disabled {
    color: #ccc;
    cursor: not-allowed;
}

.header-actions .el-icon {
    font-size: 1.25rem;
}

.message-item {
  padding: 1rem;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  border-left: 4px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.message-item:hover {
  background-color: var(--medium-grey);
}

.message-item.selected {
  background-color: #ffffff;
  border-left-color: var(--primary-purple);
}

.message-item .from {
  font-weight: 700;
  word-break: break-all;
}

.message-item .subject {
  color: var(--dark-grey);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.message-detail {
  width: 65%;
  background-color: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-sizing: border-box;
}

.empty-state, .loading-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: var(--dark-grey);
}

.message-content-header {
    margin-bottom: 1rem;
}

.message-content-header h3 {
    margin: 0 0 0.5rem 0;
}

.message-content-header p {
    margin: 0;
    color: var(--dark-grey);
    word-break: break-all;
}

.message-body {
  background-color: #ffffff;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  white-space: pre-wrap;
  word-wrap: break-word;
  height: 300px;
  overflow-y: auto;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  position: relative;
}

.modal-content h3 {
  margin-top: 0;
  color: var(--primary-purple);
}

.modal-content ol {
  padding-left: 1.5rem;
  line-height: 1.8;
  font-size: 1.05rem;
  color: var(--dark-grey);
}

.modal-content code {
  background-color: var(--light-purple);
  color: var(--text-light);
  padding: 0.3em 0.6em;
  border-radius: 6px;
  font-family: monospace;
  font-weight: 500;
}

.close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: var(--dark-grey);
}


/* Responsive */
@media (max-width: 768px) {
  body {
    -webkit-text-size-adjust: 100%; /* Prevent iOS font scaling */
  }

  #app-main {
    padding: 0 1rem;
  }

  .app-header {
    padding: 1rem; /* Adjust padding for mobile */
    /* Keep flex row layout for alignment */
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .nav-links {
    margin-left: 0; /* Reset margin for mobile */
  }
  
  .nav-links a {
    margin: 0 0 0 1rem; /* Space out the links */
  }

  .hero-section {
    padding: 2rem 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center; /* Ensure content is centered on mobile */
  }

  .hero-section h1 {
    font-size: 1.8rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .input-group {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .email-input {
    max-width: none; /* Remove max-width on mobile */
  }

  .inbox-section {
    min-width: 0; /* Reset min-width */
    padding: 1rem;
  }

  .inbox-container {
    flex-direction: column;
    min-height: auto;
    gap: 1rem;
  }

  .message-list,
  .message-detail {
    width: 100%;
    border-right: none;
    padding-right: 0;
  }
  
  .message-list {
    border-bottom: 1px solid var(--medium-grey);
    padding-bottom: 1rem;
  }

  .message-detail .empty-state {
    padding: 2rem 0;
  }

  .message-body {
    height: auto; /* Adjust height for mobile */
    max-height: 400px;
  }
  
  .modal-content {
    width: 95%;
    padding: 1.5rem;
  }
}

/* 方案二优化版：现代渐变风格 */
::-webkit-scrollbar {
  width: 8px; /* 保持一个舒适的宽度 */
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-grey); /* 轨道颜色与背景融为一体 */
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(45deg, var(--light-purple), var(--primary-purple)); /* 调整渐变角度 */
  border-radius: 4px; /* 圆角调整为一半的宽度 */
  border: 2px solid var(--light-grey); /* 使用轨道颜色作为边框，营造内边距效果 */
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(45deg, var(--primary-purple), var(--dark-purple)); /* 悬停时加深渐变 */
}