/* CSS variables for clean design tokens */
:root {
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-title: 'Outfit', sans-serif;
  
  --bg-app: #0b0f19;
  --bg-sidebar: #0f1524;
  --bg-card: rgba(22, 31, 51, 0.6);
  --bg-card-hover: rgba(26, 37, 61, 0.8);
  --border-color: rgba(255, 255, 255, 0.08);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent: #6366f1; /* Indigo */
  --accent-hover: #4f46e5;
  --accent-light: rgba(99, 102, 241, 0.15);
  
  --color-green: #10b981;
  --color-green-light: rgba(16, 185, 129, 0.15);
  --color-blue: #0ea5e9;
  --color-blue-light: rgba(14, 165, 233, 0.15);
  --color-purple: #a855f7;
  --color-purple-light: rgba(168, 85, 247, 0.15);
  --color-red: #ef4444;
  --color-red-light: rgba(239, 68, 68, 0.15);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
  --border-radius: 12px;
  --transition-speed: 0.25s;
}

/* Reset & Basic Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-app);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Main Layout Grid */
.app-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  height: 100vh;
  width: 100vw;
}

/* Sidebar Styling */
.sidebar {
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 24px 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.brand-icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.brand-text {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.accent-text {
  color: var(--accent);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-grow: 1;
}

.nav-item {
  width: 100%;
  padding: 12px 16px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  transition: all var(--transition-speed) cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.03);
}

.nav-item.active {
  color: var(--text-primary);
  background-color: var(--accent-light);
  border-left: 3px solid var(--accent);
}

.nav-icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-speed) ease;
}

.nav-item:hover .nav-icon {
  transform: translateX(2px);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-green);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* Main Panel Styling */
.main-panel {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
  padding: 32px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-info h1 {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.font-medium { font-weight: 500; }
.font-small { font-size: 13px !important; }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-red { color: var(--color-red) !important; }

/* Tabs Layout visibility */
.tab-content {
  animation: fadeIn 0.3s ease;
}

.tab-content.hidden {
  display: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Button UI Components */
.btn {
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

/* Card layout (Glassmorphism design) */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-md);
}

.card-full {
  width: 100%;
}

.card-header {
  margin-bottom: 20px;
}

.card-header h2 {
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

/* Stats Cards Grid Layout */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

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

.stat-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 20px;
  height: 20px;
}

.purple-bg { background-color: var(--color-purple-light); color: var(--color-purple); }
.blue-bg { background-color: var(--color-blue-light); color: var(--color-blue); }
.green-bg { background-color: var(--color-green-light); color: var(--color-green); }
.red-bg { background-color: var(--color-red-light); color: var(--color-red); }

.stat-value {
  font-family: var(--font-title);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
}

.stat-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* Dashboard Splitted View */
.dashboard-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* Form Styles & Inputs */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

input, select, textarea {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
}

/* Table Style UI */
.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

th {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.01);
}

/* Status Badges */
.badge {
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  display: inline-flex;
}

.badge-pending { background-color: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.badge-sent { background-color: var(--color-blue-light); color: var(--color-blue); }
.badge-opened { background-color: var(--color-green-light); color: var(--color-green); }
.badge-bounced { background-color: var(--color-red-light); color: var(--color-red); }

/* Progress Bar Container */
.progress-container {
  margin-top: 8px;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 13.5px;
}

.progress-bar-bg {
  width: 100%;
  height: 10px;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--accent);
  border-radius: 5px;
  transition: width 0.5s ease-out;
}

/* Bulk Upload Split Section */
.upload-split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.upload-form-box textarea {
  width: 100%;
  font-family: monospace;
}

.upload-dropzone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--border-radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
  gap: 12px;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.upload-dropzone:hover {
  border-color: var(--accent);
  background-color: rgba(255, 255, 255, 0.01);
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  color: var(--text-muted);
}

.hidden-input {
  display: none;
}

/* CSV Mapper Section */
.csv-mapper-section {
  border-top: 1px solid var(--border-color);
  margin-top: 24px;
  padding-top: 24px;
}

.mapper-fields-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.border-bottom { border-bottom: 1px solid var(--border-color); }
.border-top { border-top: 1px solid var(--border-color); }

/* Senders items visual grid */
.sender-card-item {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)) 100px;
  gap: 16px;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.01);
}

/* Apollo Filters Form */
.apollo-filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* Split grids for campaigns templates */
.campaign-split-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

/* Senders status UI inside Dashboard */
.senders-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sender-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.02);
}

/* Logs feed style */
.logs-feed {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 250px;
  overflow-y: auto;
  padding-right: 8px;
}

.log-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  border-radius: 6px;
  background-color: rgba(255, 255, 255, 0.01);
  border-left: 3px solid var(--text-muted);
}

.log-item.sent { border-left-color: var(--color-blue); }
.log-item.opened { border-left-color: var(--color-green); }
.log-item.bounced { border-left-color: var(--color-red); }

.log-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.log-msg {
  font-size: 12.5px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Modal Overlay & Card Layout */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease-out;
}

.modal-overlay.hidden {
  display: none !important;
}

.badge-active {
  background-color: var(--color-green-light);
  color: var(--color-green);
}

.badge-paused {
  background-color: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}