/* Design System & Aesthetics */
:root {
  --border-glass: rgba(255, 255, 255, 0.08);
  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --font-sans: 'Plus Jakarta Sans', 'Be Vietnam Pro', 'Inter', -apple-system, sans-serif;
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Theme 1: Premium Dark (Mặc định) */
body.theme-dark {
  --bg-main: #0B0F19; /* Deep space dark blue */
  --bg-card: rgba(20, 26, 46, 0.6);
  --bg-card-hover: rgba(20, 26, 46, 0.8);
  --color-primary: #8B5CF6; /* Violet */
  --color-secondary: #06B6D4; /* Cyan */
  --color-accent: #EC4899; /* Pink */
  --shadow-neon: 0 0 25px rgba(139, 92, 246, 0.15);
  background-image: 
    radial-gradient(at 0% 0%, rgba(139, 92, 246, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.08) 0px, transparent 50%);
}

/* Theme 2: Premium Slate Light (Chuyên nghiệp, dễ đọc) */
body.theme-light {
  --bg-main: #F8FAFC; /* Slate 50 - extremely soft and elegant light gray */
  --bg-card: #FFFFFF; /* Pure solid white for 100% text readability */
  --bg-card-hover: #FFFFFF;
  --color-primary: #6366F1; /* Indigo - Corporate violet */
  --color-secondary: #0EA5E9; /* Sky blue */
  --color-accent: #D946EF; /* Fuchsia */
  --shadow-neon: 0 10px 25px -5px rgba(99, 102, 241, 0.1), 0 8px 10px -6px rgba(99, 102, 241, 0.1);
  --border-glass: #E2E8F0; /* Slate 200 - crisp, distinct border */
  --text-main: #0F172A; /* Slate 900 - high contrast dark slate text */
  --text-muted: #475569; /* Slate 600 - highly readable muted text */
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.06) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.04) 0px, transparent 50%);
}

/* Light Theme Overrides to guarantee absolute readability and clean styles */
body.theme-light .navbar {
  background: rgba(255, 255, 255, 0.85) !important;
  border-bottom: 1px solid #E2E8F0 !important;
}

body.theme-light .nav-brand {
  color: #0F172A !important;
}

body.theme-light .nav-brand span {
  background: linear-gradient(135deg, #6366F1, #0EA5E9) !important;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.theme-light #theme-selector {
  background: #FFF !important;
  border-color: #CBD5E1 !important;
  color: #0F172A !important;
}

body.theme-light select.form-control {
  background-image: url("data:image/svg+xml;utf8,<svg fill='%23475569' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>") !important;
  background-repeat: no-repeat !important;
  background-position: right 10px center !important;
}

body.theme-light .form-control {
  background: #FFFFFF !important;
  border: 1px solid #CBD5E1 !important;
  color: #0F172A !important;
}

body.theme-light .form-control:focus {
  border-color: #6366F1 !important;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15) !important;
  background: #FFFFFF !important;
}

body.theme-light .card {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(0, 0, 0, 0.08) !important;
}

body.theme-light .card:hover {
  border-color: #CBD5E1 !important;
  box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.15), 0 8px 10px -6px rgba(99, 102, 241, 0.15) !important;
}

body.theme-light h1 {
  background: linear-gradient(135deg, #0F172A 0%, #6366F1 100%) !important;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.theme-light .user-badge {
  background: #F1F5F9 !important;
  border-color: #E2E8F0 !important;
  color: #6366F1 !important;
}

body.theme-light .drawer {
  background: #FFFFFF !important;
  border-left: 1px solid #E2E8F0 !important;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05) !important;
  color: #0F172A !important;
}

body.theme-light .drawer-header {
  border-bottom: 1px solid #E2E8F0 !important;
}

body.theme-light .timeline-event {
  border-left: 2px solid #E2E8F0 !important;
}

body.theme-light .timeline-event::before {
  background: #CBD5E1 !important;
  border-color: #FFF !important;
}

body.theme-light tr {
  border-bottom: 1px solid #E2E8F0 !important;
}

body.theme-light tr:hover {
  background: #F8FAFC !important;
}

body.theme-light th {
  background: #F1F5F9 !important;
  color: #475569 !important;
  border-bottom: 2px solid #E2E8F0 !important;
}

body.theme-light .tab-btn {
  background: #F1F5F9 !important;
  color: #475569 !important;
  border: 1px solid #E2E8F0 !important;
}

body.theme-light .tab-btn:hover {
  background: #E2E8F0 !important;
  color: #0F172A !important;
}

body.theme-light .tab-btn.active {
  background: #6366F1 !important;
  color: #FFFFFF !important;
  border-color: #6366F1 !important;
}

body.theme-light .modal-content {
  background: #FFFFFF !important;
  color: #0F172A !important;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04) !important;
  border: 1px solid #E2E8F0 !important;
}

body.theme-light .btn-secondary {
  background: #E2E8F0 !important;
  color: #475569 !important;
  border: 1px solid #CBD5E1 !important;
}

body.theme-light .btn-secondary:hover {
  background: #CBD5E1 !important;
  color: #0F172A !important;
}

body.theme-light .notification-dot {
  border-color: #FFFFFF !important;
}

body.theme-light .timeline-badge {
  background: #F1F5F9 !important;
  border-color: #E2E8F0 !important;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-attachment: fixed;
  transition: var(--transition-smooth);
}

/* Typography & Layout Utilities */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.2rem;
  background: linear-gradient(135deg, #FFF 0%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Header Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.3rem;
  font-weight: 800;
  color: #FFF;
}

.nav-brand span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  padding: 0.4rem 0.8rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-secondary);
}

/* Glassmorphism Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
  flex: 1;
}

/* Glassmorphism Card style */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  transition: var(--transition-smooth);
}

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

/* Input Fields & Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.3);
  background: rgba(0, 0, 0, 0.4);
}

/* Custom Select & Checkbox */
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg fill='white' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.checkbox-label input {
  accent-color: var(--color-primary);
  width: 18px;
  height: 18px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7C3AED 100%);
  color: #FFF;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-secondary) 0%, #0891B2 100%);
  color: #FFF;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.6);
}

.btn-danger {
  background: var(--color-error);
  color: #FFF;
}

/* Tab Headers */
.tab-container {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-glass);
  padding-bottom: 0.5rem;
}

.tab-btn {
  padding: 0.6rem 1.2rem;
  background: transparent;
  color: var(--text-muted);
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border-radius: 6px;
}

.tab-btn.active {
  color: #FFF;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

/* Onboarding Carousel (5 steps) */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
}

.modal-content {
  width: 100%;
  max-width: 550px;
}

.carousel-slide {
  text-align: center;
  padding: 1rem;
}

.carousel-icon {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  color: var(--color-secondary);
}

.carousel-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.carousel-desc {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transition: var(--transition-smooth);
}

.indicator.active {
  background: var(--color-primary);
  width: 24px;
  border-radius: 4px;
}

/* Page Routing Views */
.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
  animation: fadeIn 0.4s ease-out;
}

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

/* Leads Grid & Timeline List */
.leads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.lead-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 1.25rem;
  transition: var(--transition-smooth);
  position: relative;
}

.lead-card:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.lead-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.status-badge {
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-badge.new { background: rgba(59, 130, 246, 0.15); color: #60A5FA; }
.status-badge.consulting { background: rgba(245, 158, 11, 0.15); color: #FBBF24; }
.status-badge.done { background: rgba(16, 185, 129, 0.15); color: #34D399; }
.status-badge.lost { background: rgba(239, 68, 68, 0.15); color: #F87171; }
.status-badge.disputed { background: rgba(236, 72, 153, 0.15); color: #F472B6; }

.lead-body p {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.lead-body p strong {
  color: var(--text-main);
}

.lead-footer {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-glass);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Timeline Drawer */
.drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 420px;
  height: 100vh;
  background: rgba(15, 22, 42, 0.95);
  backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-glass);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  z-index: 500;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 2rem;
  overflow-y: auto;
}

.drawer.open {
  right: 0;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.timeline-list {
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid rgba(255, 255, 255, 0.08);
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-dot {
  position: absolute;
  left: -29px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--bg-main);
}

.timeline-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0.2rem 0;
}

.timeline-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
  padding: 0.5rem;
  border-radius: 4px;
  border-left: 2px solid var(--color-secondary);
}

/* Vouchers Grid & Table */
.vouchers-table-wrapper {
  overflow-x: auto;
  margin-top: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-glass);
  font-size: 0.9rem;
}

th {
  background: rgba(255, 255, 255, 0.02);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

/* Responsive Grid styling */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem;
  }
  .drawer {
    width: 100%;
    right: -100%;
  }
  .leads-grid {
    grid-template-columns: 1fr;
  }
}