/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
  --font-primary: 'Plus Jakarta Sans', sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Colors */
  --bg-primary: #0a0e17;
  --bg-card: rgba(22, 30, 49, 0.65);
  --bg-card-hover: rgba(30, 41, 67, 0.8);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-primary: #6366f1;
  --color-primary-glow: rgba(99, 102, 241, 0.35);
  
  /* Grade Accents */
  --g10-primary: #f97316;
  --g10-secondary: #ea580c;
  --g10-glow: rgba(249, 115, 22, 0.25);
  
  --g11-primary: #0d9488;
  --g11-secondary: #0f766e;
  --g11-glow: rgba(13, 148, 136, 0.25);
  
  --g12-primary: #8b5cf6;
  --g12-secondary: #c084fc;
  --g12-glow: rgba(139, 92, 246, 0.25);

  /* Status Colors */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.12);
  --color-success-border: rgba(16, 185, 129, 0.3);
  --color-success-glow: rgba(16, 185, 129, 0.4);
  
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.12);
  --color-danger-border: rgba(239, 68, 68, 0.3);
  --color-danger-glow: rgba(239, 68, 68, 0.35);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows & Blurs */
  --blur-glass: 16px;
  --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --shadow-neon: 0 0 15px rgba(99, 102, 241, 0.3);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Moving Mesh Background */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #0d1527 0%, #05080f 100%);
}

.mesh-1, .mesh-2, .mesh-3 {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  animation: float-around 20s infinite alternate ease-in-out;
}

.mesh-1 {
  background: var(--color-primary);
  width: 300px;
  height: 300px;
  top: 10%;
  left: -50px;
}

.mesh-2 {
  background: var(--g12-primary);
  width: 400px;
  height: 400px;
  bottom: 10%;
  right: -100px;
  animation-duration: 25s;
  animation-delay: -5s;
}

.mesh-3 {
  background: var(--g10-primary);
  width: 250px;
  height: 250px;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-duration: 18s;
  animation-delay: -8s;
}

@keyframes float-around {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -50px) scale(1.1); }
  100% { transform: translate(-20px, 40px) scale(0.9); }
}

/* Glassmorphism Panel Component */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-glass));
  -webkit-backdrop-filter: blur(var(--blur-glass));
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  box-shadow: var(--shadow-premium);
}

/* ==========================================================================
   LAYOUT STRUCTURE
   ========================================================================== */
.app-container {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 90px; /* Space for Bottom Nav */
}

/* App Header */
.app-header {
  padding: 24px 20px 16px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 24px;
  background: rgba(255, 255, 255, 0.05);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid var(--border-glass);
}

.logo-area h1 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 11px;
  color: var(--text-secondary);
}

/* Month Selector styling */
.month-selector {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 8px 12px;
  margin-top: 4px;
}

.month-nav-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: var(--transition-fast);
}

.month-nav-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.month-nav-btn:active {
  transform: scale(0.9);
}

.month-display {
  position: relative;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.month-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

/* App Content Area */
.app-content {
  flex: 1;
  padding: 16px 20px;
}

/* ==========================================================================
   TAB PANE BEHAVIOUR
   ========================================================================== */
.tab-pane {
  display: none;
  animation: fadeIn var(--transition-normal);
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   TAB 1: STUDENTS PAGE
   ========================================================================== */
/* Filter bar */
.filter-bar {
  padding: 12px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.grade-filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}

/* Hide scrollbar for filters */
.grade-filters::-webkit-scrollbar {
  display: none;
}

.filter-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.filter-chip:hover {
  background: rgba(255, 255, 255, 0.08);
}

.filter-chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  box-shadow: 0 0 10px var(--color-primary-glow);
}

.filter-chip.grade-10-chip.active {
  background: var(--g10-primary);
  border-color: var(--g10-primary);
  box-shadow: 0 0 10px var(--g10-glow);
}

.filter-chip.grade-11-chip.active {
  background: var(--g11-primary);
  border-color: var(--g11-primary);
  box-shadow: 0 0 10px var(--g11-glow);
}

.filter-chip.grade-12-chip.active {
  background: var(--g12-primary);
  border-color: var(--g12-primary);
  box-shadow: 0 0 10px var(--g12-glow);
}

/* Search Box */
.search-box {
  position: relative;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  background: rgba(10, 14, 23, 0.5);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 12px 14px 12px 42px;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 14px;
  transition: var(--transition-fast);
}

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

.clear-btn {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
}

/* Student List Grid */
.student-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Student Card */
.student-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-radius: 16px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.student-card:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.student-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.student-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.student-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.edit-icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  border-radius: 4px;
  transition: var(--transition-fast);
}

.edit-icon-btn:hover {
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.05);
}

.student-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.grade-badge {
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Grade Color Styling on Cards */
.student-card.grade-10 {
  border-left: 4px solid var(--g10-primary);
}
.student-card.grade-10 .grade-badge {
  background: var(--g10-glow);
  color: var(--g10-primary);
  border: 1px solid rgba(249, 115, 22, 0.3);
}

.student-card.grade-11 {
  border-left: 4px solid var(--g11-primary);
}
.student-card.grade-11 .grade-badge {
  background: var(--g11-glow);
  color: var(--g11-primary);
  border: 1px solid rgba(13, 148, 136, 0.3);
}

.student-card.grade-12 {
  border-left: 4px solid var(--g12-primary);
}
.student-card.grade-12 .grade-badge {
  background: var(--g12-glow);
  color: var(--g12-secondary);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.fee-display {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Action button (Toggle Payment) */
.payment-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
  min-height: 40px;
}

/* Unpaid Action Button */
.payment-toggle-btn.unpaid {
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  color: var(--text-secondary);
}

.payment-toggle-btn.unpaid:hover {
  background: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

/* Paid Action Button */
.payment-toggle-btn.paid {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: var(--color-success);
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.15);
  animation: pop-bounce 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.payment-toggle-btn.paid:hover {
  filter: brightness(1.1);
}

@keyframes pop-bounce {
  0% { transform: scale(0.9); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

/* Empty State / No Data */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  text-align: center;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.7;
}

.empty-state h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: 6px;
}

.empty-state p {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 250px;
}

/* Skeleton Loading */
.skeleton-card {
  height: 80px;
  background: linear-gradient(90deg, rgba(255,255,255,0.03) 25%, rgba(255,255,255,0.08) 50%, rgba(255,255,255,0.03) 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
  border-radius: 16px;
  border: 1px solid var(--border-glass);
}

@keyframes loading-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   TAB 2: ADD STUDENT FORM
   ========================================================================== */
.form-container {
  padding: 24px;
}

.form-container h2 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.form-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-select {
  background: rgba(10, 14, 23, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 14px;
  transition: var(--transition-fast);
  width: 100%;
}

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

.form-tip {
  font-size: 11px;
  color: var(--text-muted);
}

/* Custom Grade Selector Radio Cards */
.grade-selector-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.grade-radio-label {
  cursor: pointer;
}

.grade-radio-label input[type="radio"] {
  display: none;
}

.grade-radio-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  transition: var(--transition-fast);
}

.grade-radio-btn .g-num {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
}

.grade-radio-btn .g-text {
  font-size: 10px;
  margin-top: 4px;
  color: var(--text-secondary);
}

/* Radio Checked Styles */
.grade-10 input[type="radio"]:checked + .grade-radio-btn {
  border-color: var(--g10-primary);
  background: var(--g10-glow);
  box-shadow: 0 0 12px rgba(249, 115, 22, 0.15);
}
.grade-10 input[type="radio"]:checked + .grade-radio-btn .g-num {
  color: var(--g10-primary);
}

.grade-11 input[type="radio"]:checked + .grade-radio-btn {
  border-color: var(--g11-primary);
  background: var(--g11-glow);
  box-shadow: 0 0 12px rgba(13, 148, 136, 0.15);
}
.grade-11 input[type="radio"]:checked + .grade-radio-btn .g-num {
  color: var(--g11-primary);
}

.grade-12 input[type="radio"]:checked + .grade-radio-btn {
  border-color: var(--g12-primary);
  background: var(--g12-glow);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.15);
}
.grade-12 input[type="radio"]:checked + .grade-radio-btn .g-num {
  color: var(--g12-secondary);
}

/* Submit Form Button */
.submit-btn {
  background: linear-gradient(135deg, var(--color-primary) 0%, #4f46e5 100%);
  border: none;
  border-radius: 12px;
  color: white;
  padding: 14px;
  font-family: var(--font-primary);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  width: 100%;
  margin-top: 10px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.submit-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.submit-btn:active {
  transform: translateY(1px);
}

/* ==========================================================================
   TAB 3: REPORTS & STATS
   ========================================================================== */
/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.kpi-card {
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  text-align: center;
}

.kpi-icon {
  font-size: 20px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
}

.kpi-content h3 {
  font-size: 10px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  margin-top: 2px;
}

.kpi-card.paid .kpi-value {
  color: var(--color-success);
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

.kpi-card.unpaid .kpi-value {
  color: var(--color-danger);
  text-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

.kpi-card.expected .kpi-value {
  color: #38bdf8;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

/* Stats Section Standard */
.stats-section {
  padding: 20px;
  margin-bottom: 16px;
}

.stats-section h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

/* Progress bar style */
.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.progress-info h3 {
  margin-bottom: 0;
}

.progress-val {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-success);
}

.progress-track {
  height: 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 10px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981 0%, #059669 100%);
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-details {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
}

/* Grade Breakdown Table */
.grade-table-container {
  overflow-x: auto;
}

.grade-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13px;
}

.grade-table th {
  color: var(--text-muted);
  font-weight: 500;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-glass);
}

.grade-table td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-weight: 500;
}

.table-grade-num {
  font-family: var(--font-display);
  font-weight: 700;
}

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

.grade-ratio-pill {
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 11px;
  display: inline-block;
}

/* Debtors List */
.debtors-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.debtors-header h3 {
  margin-bottom: 0;
}

.debtor-badge {
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  color: var(--color-danger);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
}

.debtors-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
}

/* Custom Scrollbar for Debtors */
.debtors-list::-webkit-scrollbar {
  width: 4px;
}
.debtors-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.debtor-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
}

.debtor-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.debtor-name {
  font-size: 13px;
  font-weight: 600;
}

.debtor-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.remind-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: #38bdf8;
  padding: 6px 10px;
  border-radius: 8px;
  font-family: var(--font-primary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.remind-btn:hover {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
}

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

/* ==========================================================================
   BOTTOM NAVIGATION BAR
   ========================================================================== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 600px;
  height: 76px;
  background: rgba(13, 20, 35, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-glass);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  z-index: 100;
  padding: 6px 0 10px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
}

.nav-item {
  background: none;
  border: none;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.nav-icon {
  width: 44px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  transition: var(--transition-fast);
}

.nav-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.nav-item:hover {
  color: var(--text-secondary);
}

/* Active bottom nav styling */
.nav-item.active {
  color: var(--text-primary);
}

.nav-item.active .nav-icon {
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
}

/* ==========================================================================
   MODAL DIALOG
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 7, 12, 0.8);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  width: 100%;
  max-width: 480px;
  padding: 24px;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}

/* Modal form controls */
.form-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  gap: 12px;
}

.right-actions {
  display: flex;
  gap: 10px;
}

.btn {
  padding: 10px 18px;
  border-radius: 10px;
  font-family: var(--font-primary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
}
.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-danger {
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  color: var(--color-danger);
}
.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
}

/* ==========================================================================
   TOAST NOTIFICATION
   ========================================================================== */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: calc(100% - 40px);
  max-width: 380px;
  pointer-events: none;
}

.toast {
  background: rgba(13, 20, 35, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  padding: 12px 16px;
  border-radius: 12px;
  color: white;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  transform: translateY(-20px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-danger);
}

.toast-info {
  border-left: 4px solid #38bdf8;
}

/* ==========================================================================
   RESPONSIVE LAYOUTS
   ========================================================================== */
@media (min-width: 601px) {
  .app-container {
    border-left: 1px solid var(--border-glass);
    border-right: 1px solid var(--border-glass);
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
  }
}