/* ==========================================================================
   Premium SaaS Design System - Subscription Tracker
   Inspired by Linear / Stripe
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-app: #0e0e11;
  --bg-panel: #161619;
  --bg-panel-hover: #1c1c21;
  --bg-input: #1a1a1f;
  --bg-elevated: #232328;
  
  --text-primary: #f0f0f5;
  --text-secondary: #9ea0ab;
  --text-tertiary: #6b6d7a;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  
  --primary: #5e6ad2;
  --primary-hover: #6c79e6;
  --primary-glow: rgba(94, 106, 210, 0.2);
  
  --accent-purple: #9b72cf;
  --accent-teal: #2dbfb8;
  --accent-rose: #d66085;
  --accent-yellow: #e2b449;
  
  --danger: #d44d4d;
  --danger-hover: #e55e5e;
  --success: #3bb273;
  --success-glow: rgba(59, 178, 115, 0.15);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  
  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows & Depth */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 24px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 20px var(--primary-glow);
  
  /* Transitions */
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

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

/* ==========================================================================
   Layout Architecture
   ========================================================================== */
.app-container {
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-6);
  position: sticky;
  top: 0;
  background: rgba(14, 14, 17, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-glow);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.search-bar {
  position: relative;
  width: 240px;
}

.search-bar i {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

.search-bar input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 16px 8px 36px;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.875rem;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.search-bar input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
  background: var(--bg-panel);
}

/* Dashboard Grid (70/30 Split) */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: var(--space-6);
  align-items: start;
  padding-bottom: var(--space-8);
}

.main-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: sticky;
  top: 88px;
}

/* ==========================================================================
   Analytics Cards
   ========================================================================== */
.analytics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.stat-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-smooth);
}

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

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--stat-color, var(--primary)), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card.monthly { --stat-color: var(--primary); }
.stat-card.yearly { --stat-color: var(--accent-purple); }
.stat-card.active { --stat-color: var(--accent-teal); }

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.stat-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: var(--bg-elevated);
  color: var(--stat-color, var(--primary));
}

.stat-value {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-top: var(--space-2);
}

/* ==========================================================================
   Data Controls & Filters
   ========================================================================== */
.controls-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.category-tabs {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  padding-bottom: 4px;
}

.tab-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast);
  white-space: nowrap;
}

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

.tab-btn.active {
  background: var(--text-primary);
  color: var(--bg-app);
  border-color: var(--text-primary);
}

.toolbar-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

/* ==========================================================================
   Subscription List (Modern Hybrid Table/Cards)
   ========================================================================== */
.subs-container {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.subs-header {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr 80px;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0,0,0,0.2);
  color: var(--text-tertiary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.subs-list {
  display: flex;
  flex-direction: column;
}

.sub-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr 80px;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-fast);
  animation: fadeIn 0.4s ease-out forwards;
}

.sub-row:last-child {
  border-bottom: none;
}

.sub-row:hover {
  background: var(--bg-elevated);
}

.sub-cell {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
}

/* Service Info */
.service-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.service-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 600;
  text-transform: uppercase;
  box-shadow: var(--shadow-sm);
}

.service-name {
  font-weight: 500;
  color: var(--text-primary);
}

.service-category {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* Badges */
.badge {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

.badge-active {
  background: rgba(59, 178, 115, 0.1);
  color: var(--success);
  border: 1px solid rgba(59, 178, 115, 0.2);
}

.badge-danger {
  background: rgba(212, 77, 77, 0.1);
  color: var(--danger);
  border: 1px solid rgba(212, 77, 77, 0.2);
}

/* Cost */
.sub-cost {
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.sub-cycle {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 400;
}

/* Actions */
.row-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.sub-row:hover .row-actions {
  opacity: 1;
}

.btn-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.btn-icon:hover {
  background: var(--bg-input);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-icon.danger:hover {
  color: var(--danger);
  background: rgba(212, 77, 77, 0.1);
  border-color: rgba(212, 77, 77, 0.2);
}

/* Empty State */
.empty-state {
  padding: var(--space-8) var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
}

.empty-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
  border: 1px solid var(--border-subtle);
}

.empty-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.empty-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  max-width: 300px;
}

/* ==========================================================================
   Sidebar Widgets
   ========================================================================== */
.widget {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.widget-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.widget-header i {
  color: var(--primary);
}

/* Upcoming Renewals */
.renewal-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.renewal-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
}

.renewal-service {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.renewal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-yellow);
}

.renewal-dot.urgent {
  background: var(--danger);
  box-shadow: 0 0 8px rgba(212, 77, 77, 0.4);
}

.renewal-dot.safe {
  background: var(--success);
}

.renewal-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.renewal-cost {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.renewal-countdown {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.renewal-countdown.urgent {
  color: var(--danger);
  background: rgba(212, 77, 77, 0.1);
  border-color: rgba(212, 77, 77, 0.2);
}

/* ==========================================================================
   Forms & Modals
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-smooth);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.95);
  transition: all var(--duration-normal) var(--ease-spring);
  overflow: hidden;
}

.modal-overlay.active .modal-card {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 1.125rem;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast);
}

.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.modal-body {
  padding: var(--space-5);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.form-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input, .form-select {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  font-size: 0.875rem;
  font-family: var(--font-family);
  transition: all var(--duration-fast);
  width: 100%;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
  background: var(--bg-panel);
}

/* Form Actions */
.modal-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  background: rgba(0,0,0,0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast);
  font-family: var(--font-family);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(94, 106, 210, 0.3);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-input);
  border-color: var(--border-strong);
}

/* ==========================================================================
   Toasts & Utils
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: 2000;
}

.toast {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  font-weight: 500;
  transform: translateX(100%);
  opacity: 0;
  animation: slideIn 0.3s var(--ease-spring) forwards;
}

.toast.success i { color: var(--success); }
.toast.error i { color: var(--danger); }
.toast.info i { color: var(--primary); }

@keyframes slideIn {
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
  to { transform: translateX(100%); opacity: 0; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .analytics-grid {
    grid-template-columns: 1fr;
  }
  
  .subs-header {
    display: none;
  }
  
  .sub-row {
    grid-template-columns: 1fr auto;
    grid-template-areas: 
      "name price"
      "category cycle"
      "actions actions";
    gap: var(--space-2);
  }
  
  .sub-row .service-info { grid-area: name; }
  .sub-row .sub-cost { grid-area: price; text-align: right; }
  .sub-row .badge { grid-area: category; width: fit-content; }
  .sub-row .sub-cycle { grid-area: cycle; text-align: right; }
  .sub-row .row-actions { 
    grid-area: actions; 
    opacity: 1; 
    justify-content: flex-start;
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: 1px solid var(--border-subtle);
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .search-bar {
    width: 40px;
    overflow: hidden;
  }
  
  .search-bar:focus-within {
    width: 200px;
    position: absolute;
    right: var(--space-6);
  }
}