/* Growth Automation Suite - Design System */
/* Inspired by modern fintech and productivity platforms */

:root {
  /* Color Palette - Dark Theme */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a24;
  --color-bg-card: rgba(26, 26, 36, 0.6);
  --color-bg-card-hover: rgba(26, 26, 36, 0.8);

  /* Accent Colors */
  --color-accent-primary: #6366f1;
  --color-accent-secondary: #8b5cf6;
  --color-accent-tertiary: #ec4899;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-secondary: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #a1a1aa;
  --color-text-tertiary: #71717a;
  --color-text-muted: #52525b;

  /* Border & Divider */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);

  /* Status Colors */
  --color-status-pending: #f59e0b;
  --color-status-submitted: #3b82f6;
  --color-status-approved: #10b981;
  --color-status-rejected: #ef4444;

  /* Shadows & Effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  --shadow-glow-hover: 0 0 30px rgba(99, 102, 241, 0.5);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-blur: blur(12px);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Glass Card - Primary Component */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* Button System - Reusable across all pages */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button - Main CTAs */
.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: var(--shadow-glow-hover);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

/* Secondary Button - Alternative actions */
.btn-secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
}

/* Ghost Button - Subtle actions */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--glass-bg);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

/* Success Button */
.btn-success {
  background: var(--gradient-success);
  color: var(--color-text-primary);
}

.btn-success:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
  transform: translateY(-1px);
}

/* Danger Button */
.btn-danger {
  background: var(--gradient-danger);
  color: var(--color-text-primary);
}

.btn-danger:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
  transform: translateY(-1px);
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.75rem;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}

/* Input Fields - Consistent styling */
.input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input::placeholder {
  color: var(--color-text-muted);
}

/* Select Dropdown */
.select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Badge System - Status indicators */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  border: 1px solid;
}

.badge-pending {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-status-pending);
  border-color: rgba(245, 158, 11, 0.2);
}

.badge-submitted {
  background: rgba(59, 130, 246, 0.1);
  color: var(--color-status-submitted);
  border-color: rgba(59, 130, 246, 0.2);
}

.badge-approved {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-status-approved);
  border-color: rgba(16, 185, 129, 0.2);
}

.badge-rejected {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-status-rejected);
  border-color: rgba(239, 68, 68, 0.2);
}

/* Stat Card - Analytics display */
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.stat-value {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xs);
}

/* Tab Navigation */
.tab-list {
  display: flex;
  gap: var(--spacing-sm);
  background: var(--color-bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.tab-button {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.tab-button.active {
  color: var(--color-text-primary);
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
}

/* Loading Spinner */
.spinner {
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent-primary);
  border-radius: 50%;
  width: 1.5rem;
  height: 1.5rem;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-hover);
}

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

.fade-in {
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Responsive Utilities */
@media (max-width: 768px) {
  .tab-list {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .tab-list::-webkit-scrollbar {
    display: none;
  }
}