/* CSS Variables for theming */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --border-color: #dee2e6;
  --accent-color: #007bff;
  --accent-hover: #0056b3;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --logo-black: block;
  --logo-white: none;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #404040;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #404040;
  --accent-color: #4dabf7;
  --accent-hover: #339af0;
  --success-color: #51cf66;
  --danger-color: #ff6b6b;
  --logo-black: none;
  --logo-white: block;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  flex-shrink: 0;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  background-color: var(--bg-secondary);
}

.theme-toggle:hover {
  background-color: var(--bg-tertiary);
  transform: scale(1.05);
}

.app-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

.nav-tabs {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  width: 200px;
  flex-shrink: 0;
}

.tab-btn {
  padding: 1.5rem 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--bg-primary);
  color: var(--accent-color);
  border-right: 3px solid var(--accent-color);
  font-weight: 600;
}

.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Update the email form to use horizontal layout */
.email-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: none;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 200px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group.message-group {
  grid-column: 1 / -1;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 1rem;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--success-color);
  color: white;
}

.btn-secondary:hover {
  background-color: #218838;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* Horizontal layout for contact form */
.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 1rem;
  align-items: stretch; /* Change from 'end' to 'stretch' */
}

.contact-form .form-row input {
  min-width: auto;
  height: 48px; /* Set explicit height to match button */
  display: flex;
  align-items: center;
}

.contact-form .form-row .btn {
  height: 48px; /* Ensure button has same height */
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Section headers with horizontal spacing */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.section-header h2,
.section-header h3 {
  color: var(--text-primary);
}

/* Horizontal layout for drafts and contacts lists */
.drafts-list,
.contacts-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

.draft-item,
.contact-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  transition: all 0.3s ease;
  height: fit-content;
}

.draft-header,
.contact-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.draft-subject {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.draft-to,
.draft-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.draft-preview {
  margin-top: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

.contact-name {
  font-weight: 600;
  color: var(--text-primary);
}

.contact-email {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.contact-form {
  margin-bottom: 2rem;
}

.form-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-row input {
  flex: 1;
  min-width: 200px;
}

.empty-state {
  text-align: center;
  color: var(--text-secondary);
  font-style: italic;
  padding: 2rem;
}

.draft-actions,
.contact-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-xs {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

/* Responsive adjustments for horizontal layout */
@media (max-width: 1024px) {
  .email-form {
    grid-template-columns: 1fr;
  }

  .drafts-list,
  .contacts-list {
    grid-template-columns: 1fr;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-body {
    flex-direction: column;
  }

  .nav-tabs {
    flex-direction: row;
    width: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .tab-btn {
    flex: 1;
    text-align: center;
    border-bottom: none;
    border-right: 1px solid var(--border-color);
  }

  .tab-btn:last-child {
    border-right: none;
  }

  .tab-btn.active {
    border-right: none;
    border-bottom: 3px solid var(--accent-color);
  }

  .container {
    margin: 0;
  }

  .header {
    padding: 1rem;
  }

  .main-content {
    padding: 1rem;
  }

  .contact-form .form-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tab-content.active {
  animation: fadeIn 0.3s ease;
}

.draft-item,
.contact-item {
  animation: fadeIn 0.3s ease;
}