/* Modern Pipedrive-inspired Design System */
:root {
  /* Colors - Modern & Professional */
  --primary: #5B9BD5;
  --primary-hover: #4A8BC2;
  --primary-light: #E8F1F8;
  --secondary: #7C7C7C;
  --success: #28A745;
  --warning: #FFC107;
  --danger: #DC3545;
  --info: #17A2B8;
  
  /* Neutrals */
  --bg-primary: #F8F9FA;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F1F3F5;
  --border: #E1E4E8;
  --border-light: #F0F0F0;
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.16);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Stage Colors */
  --stage-prospect: #E8F1F8;
  --stage-mail1: #E8F5E9;
  --stage-mail2: #FFF3E0;
  --stage-call: #F3E5F5;
  --stage-mail3: #FFF8E1;
  --stage-closed: #E0F2F1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 14px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

h2 {
  font-size: 24px;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 18px;
  margin-bottom: var(--spacing-md);
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.navbar a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.navbar a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-user {
  color: var(--text-secondary);
  font-size: 13px;
  padding: var(--spacing-sm) var(--spacing-md);
}

/* Flash Messages */
.flash-container {
  margin: var(--spacing-md) var(--spacing-xl);
  max-width: 1200px;
}

.flash {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  border-left: 4px solid;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}

.flash.success {
  background: #E8F5E9;
  color: var(--success);
  border-color: var(--success);
}

.flash.danger {
  background: #FFEBEE;
  color: var(--danger);
  border-color: var(--danger);
}

.flash.info {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.flash.warning {
  background: #FFF8E1;
  color: #F57C00;
  border-color: #FFC107;
}

/* Main Container */
main {
  max-width: 1600px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  min-height: calc(100vh - 80px);
}

/* Board Container */
.board-container {
  padding: 0;
}

/* Branch Tabs */
.branch-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border);
  align-items: stretch;
}

.branch-tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1.5;
  min-height: 36px;
  box-sizing: border-box;
}

.branch-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.branch-tab.selected {
  background: var(--primary);
  color: #FFFFFF;
  border-color: var(--primary);
}

.branch-tab.selected:hover {
  background: var(--primary-hover);
}

.branch-tab-wrapper {
  position: relative;
  display: inline-flex;
  align-items: stretch;
  min-height: 36px;
}

.branch-tab-wrapper .branch-tab {
  padding-left: 32px; /* Space for email button on left */
  padding-right: 32px; /* Space for delete button on right */
  width: 100%;
}

.branch-tab-wrapper:hover .branch-email-btn,
.branch-tab-wrapper:hover .branch-delete-btn {
  opacity: 1 !important;
}

.branch-email-btn {
  position: absolute;
  left: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 123, 255, 0.15);
  border: 1px solid rgba(0, 123, 255, 0.3);
  color: var(--primary);
  cursor: pointer;
  padding: 0;
  border-radius: 6px;
  font-size: 16px;
  opacity: 0;
  transition: all 0.2s;
  z-index: 2;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  box-sizing: border-box;
}

.branch-email-btn:hover {
  background: rgba(0, 123, 255, 0.25);
  border-color: rgba(0, 123, 255, 0.5);
  transform: translateY(-50%) scale(1.1);
  z-index: 3;
}

.branch-delete-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(220, 53, 69, 0.15);
  border: 1px solid rgba(220, 53, 69, 0.3);
  color: var(--danger);
  cursor: pointer;
  padding: 0;
  border-radius: 6px;
  font-size: 18px;
  opacity: 0;
  transition: all 0.2s;
  font-weight: bold;
  line-height: 1;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  box-sizing: border-box;
}

.branch-delete-btn:hover {
  background: rgba(220, 53, 69, 0.25);
  border-color: rgba(220, 53, 69, 0.5);
  transform: translateY(-50%) scale(1.1);
}

/* Search Form */
.search-form {
  margin-bottom: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.search-input {
  padding: 10px var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  width: 300px;
  font-size: 14px;
  transition: all 0.2s ease;
  background: var(--bg-secondary);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* Board */
.board {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: var(--spacing-md);
  min-height: 600px;
}

.board::-webkit-scrollbar {
  height: 8px;
}

.board::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.board::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-sm);
}

.board::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* Column */
.column {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  min-width: 280px;
  max-width: 320px;
  flex: 1;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 250px);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.column:hover {
  box-shadow: var(--shadow-lg);
}

.column-header {
  padding: var(--spacing-lg);
  font-weight: 600;
  font-size: 14px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  z-index: 10;
  color: var(--text-primary);
}

.column-body {
  padding: var(--spacing-md);
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.column-body::-webkit-scrollbar {
  width: 6px;
}

.column-body::-webkit-scrollbar-track {
  background: transparent;
}

.column-body::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-sm);
}

.column-body::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

.column-body.drag-over {
  background-color: var(--primary-light) !important;
  border: 2px dashed var(--primary) !important;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

/* Stage-specific styling */
.col--0 .column-header { background: linear-gradient(135deg, #E8F1F8 0%, #FFFFFF 100%); border-left: 4px solid var(--primary); }
.col--1 .column-header { background: linear-gradient(135deg, #E8F5E9 0%, #FFFFFF 100%); border-left: 4px solid var(--success); }
.col--2 .column-header { background: linear-gradient(135deg, #FFF3E0 0%, #FFFFFF 100%); border-left: 4px solid #FF9800; }
.col--3 .column-header { background: linear-gradient(135deg, #F3E5F5 0%, #FFFFFF 100%); border-left: 4px solid #9C27B0; }
.col--4 .column-header { background: linear-gradient(135deg, #FFF8E1 0%, #FFFFFF 100%); border-left: 4px solid var(--warning); }
.col--5 .column-header { background: linear-gradient(135deg, #E0F2F1 0%, #FFFFFF 100%); border-left: 4px solid #009688; }

/* Badge */
.badge {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: 12px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
  margin-left: var(--spacing-sm);
}

/* Card */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.card:active {
  transform: translateY(0);
  cursor: grabbing;
}

.card strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
}

.card-meta {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.badge-late {
  background: #FFF3E0;
  color: #E65100;
  border-radius: 10px;
  padding: 2px 6px;
  font-size: 11px;
  font-weight: 600;
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Forms */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-secondary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
  font-size: 14px;
}

.input,
.textarea,
select {
  width: 100%;
  padding: 12px var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: inherit;
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.input:focus,
.textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.textarea {
  resize: vertical;
  min-height: 100px;
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  border: none;
  padding: 12px var(--spacing-xl);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s ease;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 12px var(--spacing-xl);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-danger {
  background: var(--danger);
  color: #FFFFFF;
  border: none;
  padding: 12px var(--spacing-xl);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s ease;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-danger:hover {
  background: #C82333;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger:active {
  transform: translateY(0);
}

/* Login Page */
.login-container {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.login-box {
  background: var(--bg-secondary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--border-light);
}

.login-box h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
}

.login-box .form-group:last-of-type {
  margin-bottom: var(--spacing-lg);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.checkbox-group label {
  margin: 0;
  font-weight: 400;
  cursor: pointer;
}

/* Lead Details */
.lead-header {
  background: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-light);
}

.lead-info {
  background: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--border-light);
}

.lead-info p {
  margin-bottom: var(--spacing-md);
  font-size: 14px;
  line-height: 1.6;
}

.lead-info strong {
  color: var(--text-primary);
  font-weight: 600;
  display: inline-block;
  min-width: 120px;
}

.lead-info a {
  color: var(--primary);
  text-decoration: none;
}

.lead-info a:hover {
  text-decoration: underline;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  font-size: 14px;
}

.back-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}

/* Timeline & Notes */
.timeline,
.notes-list {
  list-style: none;
  padding: 0;
  margin: 0;
  background: var(--bg-secondary);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
}

.timeline li,
.notes-list li {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.6;
}

.timeline li:last-child,
.notes-list li:last-child {
  border-bottom: none;
}

.timeline li strong,
.notes-list li strong {
  color: var(--primary);
  font-weight: 600;
}

/* Import Page */
.import-info {
  background: var(--bg-tertiary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-lg);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  border: 1px solid var(--border-light);
}

.import-info strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--spacing-sm);
}

/* Small adjustments */
small {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
  .board {
    flex-direction: column;
  }
  
  .column {
    max-width: 100%;
    min-width: 100%;
  }
  
  .navbar {
    padding: var(--spacing-md);
    flex-wrap: wrap;
  }
  
  main {
    padding: var(--spacing-md);
  }
  
  .form-container,
  .login-box {
    padding: var(--spacing-lg);
  }
}

/* Smooth transitions */
* {
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}