@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

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

:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-elevated: #ffffff;
  --border: #e1e4e8;
  --text: #24292e;
  --text-secondary: #586069;
  --text-muted: #6a737d;
  --accent: #0366d6;
  --accent-hover: #0256c5;
  --green: #28a745;
  --green-hover: #22863a;
  --red: #d73a49;
  --red-hover: #cb2431;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.12);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-secondary);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: 30px 20px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 30px;
}

header h1 {
  font-size: 28px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

header p {
  font-size: 14px;
  color: var(--text-muted);
}

/* Toolbar */
.toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.toolbar select {
  flex: 1;
  min-width: 200px;
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.toolbar select option.used {
  color: var(--red);
}

.toolbar select option.available {
  color: var(--green);
}

.toolbar select:focus {
  outline: none;
  border-color: var(--accent);
}

.toolbar button {
  padding: 8px 14px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

.toolbar button:hover {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
}

.toolbar button:active {
  transform: scale(0.98);
}

.toolbar button.danger {
  color: var(--red);
}

.toolbar button.danger:hover {
  background: var(--red);
  color: white;
  border-color: var(--red);
}

/* New Inbox Box */
.new-box {
  margin-bottom: 16px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.new-box.hidden {
  display: none;
}

.new-box input {
  flex: 1;
  min-width: 200px;
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
}

.new-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.new-box select {
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.new-box button {
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}

.new-box button:active {
  transform: scale(0.98);
}

#createCustomBtn {
  background: var(--green);
  color: white;
}

#createCustomBtn:hover {
  background: var(--green-hover);
}

#createRandomBtn {
  background: var(--accent);
  color: white;
}

#createRandomBtn:hover {
  background: var(--accent-hover);
}

/* Bulk Create Box */
.bulk-box {
  margin-bottom: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.bulk-box.hidden {
  display: none;
}

.bulk-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.bulk-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
}

.close-btn:hover {
  background: var(--border);
  color: var(--text);
}

.bulk-content {
  padding: 16px;
}

.bulk-input-group {
  margin-bottom: 16px;
}

.bulk-input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.bulk-input-group input,
.bulk-input-group select {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
}

.bulk-input-group input:focus,
.bulk-input-group select:focus {
  outline: none;
  border-color: var(--accent);
}

.bulk-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.bulk-actions button {
  flex: 1;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}

.bulk-actions button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#generateBulkBtn {
  background: var(--accent);
  color: white;
}

#generateBulkBtn:hover:not(:disabled) {
  background: var(--accent-hover);
}

#exportCsvBtn {
  background: var(--green);
  color: white;
}

#exportCsvBtn:hover:not(:disabled) {
  background: var(--green-hover);
}

.bulk-results {
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  background: var(--bg-secondary);
  font-size: 13px;
  font-family: monospace;
  color: var(--text);
  display: none;
}

.bulk-results.show {
  display: block;
}

.bulk-results .email-item {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.bulk-results .email-item:last-child {
  border-bottom: none;
}

/* Access Key Box */
.access-key-box {
  margin-bottom: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.access-key-box.hidden {
  display: none;
}

.access-key-info {
  margin-bottom: 16px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-secondary);
}

.key-display {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0;
}

.access-key-code {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-size: 24px;
  font-weight: 700;
  padding: 12px 16px;
  background: white;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  letter-spacing: 4px;
  text-align: center;
}

.key-warning {
  font-size: 12px;
  color: var(--red);
  margin-top: 8px;
}

.key-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin: 8px 0;
}

.divider {
  margin: 20px 0;
  border: none;
  border-top: 1px solid var(--border);
}

.login-key-section {
  margin-top: 16px;
}

.key-input-group {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.key-input-group input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: center;
}

.key-input-group input:focus {
  outline: none;
  border-color: var(--accent);
}

.primary-btn {
  width: 100%;
  padding: 12px 20px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.primary-btn:active {
  transform: scale(0.98);
}

/* Panel */
.panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.panel-head h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

.panel-head span {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-left: 12px;
}

/* Message List */
.message-list {
  min-height: 200px;
}

.message-item {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.message-item:last-child {
  border-bottom: none;
}

.message-item:hover {
  background: var(--bg-secondary);
}

.message-item .message-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.message-item strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.message-item p {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.6;
}

/* OTP Section */
.otp-section {
  margin: 12px 0;
  padding: 12px;
  background: var(--bg-secondary);
  border: 2px solid var(--green);
  border-radius: var(--radius);
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.otp-codes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.otp-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.otp-code {
  font-family: 'Courier New', monospace;
  font-size: 18px;
  font-weight: 700;
  padding: 8px 16px;
  background: white;
  border: 2px solid var(--green);
  border-radius: var(--radius);
  color: var(--green);
  letter-spacing: 2px;
}

.copy-btn {
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.copy-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.copy-btn:active {
  transform: scale(0.95);
}

/* Links Section */
.links-section {
  margin: 12px 0;
  padding: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.links-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.link-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.link-url {
  flex: 1;
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

/* Message Body */
.message-body {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.6;
  margin-top: 8px;
}

.message-body-html {
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.html-frame {
  width: 100%;
  min-height: 300px;
  border: none;
  background: white;
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 36px;
  margin-bottom: 12px;
  opacity: 0.6;
}

.empty-state .title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.empty-state .sub {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 300px;
  line-height: 1.5;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 18px;
  background: var(--text);
  color: white;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  animation: slideIn 0.2s ease-out;
}

.toast.fadeout {
  animation: slideOut 0.2s ease-out forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideOut {
  to {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* Responsive */
@media (max-width: 640px) {
  .app {
    padding: 20px 12px;
  }

  header h1 {
    font-size: 24px;
  }

  .toolbar {
    flex-direction: column;
  }

  .toolbar select,
  .toolbar button {
    width: 100%;
  }

  .new-box {
    flex-direction: column;
  }

  .new-box input,
  .new-box select,
  .new-box button {
    width: 100%;
  }
}