/* ============================================
   Monetly App - Modern Dark Mode Design
   Perfect harmony with green accent (#00d16c)
   ============================================ */

:root {
  /* Dark Mode - Rich Black */
  --color-bg-primary: #000000;
  --color-bg-secondary: #0a0a0a;
  --color-bg-tertiary: #141414;
  --color-bg-card: #0f0f0f;
  --color-bg-hover: #1a1a1a;
  --color-bg-elevated: #1a1a1a;
  --color-bg-input: #0a0a0a;
  --color-bg-nav: rgba(0, 0, 0, 0.98);
  --color-bg-tab: #141414;
  
  /* Text Colors - Perfect Contrast */
  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #707070;
  --color-text-disabled: #505050;
  --color-text-inverse: #000000;
  
  /* Green Accent - Perfect Harmony */
  --color-accent: #00d16c;
  --color-accent-hover: #00ff7f;
  --color-accent-dark: #00b85a;
  --color-accent-light: #33ff99;
  --color-accent-bg: rgba(0, 209, 108, 0.12);
  --color-accent-bg-hover: rgba(0, 209, 108, 0.2);
  --color-accent-glow: rgba(0, 209, 108, 0.25);
  --color-accent-border: rgba(0, 209, 108, 0.3);
  
  /* Gradients - Green Accent */
  --gradient-primary: linear-gradient(135deg, #00d16c 0%, #00ff7f 100%);
  --gradient-accent: linear-gradient(135deg, #00d16c 0%, #33ff99 100%);
  --gradient-text: linear-gradient(135deg, #00d16c 0%, #00ff7f 100%);
  
  /* Borders - Subtle Dark */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-light: rgba(255, 255, 255, 0.12);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  --color-border-accent: rgba(0, 209, 108, 0.3);
  --color-border-focus: rgba(0, 209, 108, 0.5);
  
  /* Shadows - Deep Dark */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.9);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.95);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 1);
  --shadow-glow: 0 0 20px rgba(0, 209, 108, 0.2);
  --shadow-glow-strong: 0 0 32px rgba(0, 209, 108, 0.35);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background: #000000 !important;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', 
    'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  
  background: #000000 !important;
  background-color: #000000 !important;
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; font-weight: 800; }
h2 { font-size: 2rem; font-weight: 700; }
h3 { font-size: 1.75rem; font-weight: 600; }
h4 { font-size: 1.5rem; font-weight: 600; }
h5 { font-size: 1.25rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 500;
}

a:hover {
  color: var(--color-accent-hover);
}

/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-2xl) 0;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
  background: var(--color-bg-nav) !important;
  background-color: var(--color-bg-nav) !important;
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

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

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  transition: all var(--transition-base);
}

.navbar-brand:hover {
  filter: brightness(1.2);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border: none;
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-strong);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-bg-card) !important;
  background-color: var(--color-bg-card) !important;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  font-weight: 500;
}

.btn-secondary:hover {
  background: var(--color-bg-hover) !important;
  background-color: var(--color-bg-hover) !important;
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: #ffffff;
  border: none;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #f87171 0%, #ef4444 100%);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

.btn-danger:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
  font-weight: 500;
}

.btn-outline:hover {
  background: var(--color-accent-bg);
  border-color: var(--color-accent-hover);
  color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm), 0 0 16px var(--color-accent-glow);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.btn-google {
  background: var(--color-bg-card) !important;
  background-color: var(--color-bg-card) !important;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-google:hover {
  background: var(--color-bg-hover) !important;
  background-color: var(--color-bg-hover) !important;
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-google:active {
  transform: translateY(0);
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-bg-card) !important;
  background-color: var(--color-bg-card) !important;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  background: var(--color-bg-elevated) !important;
  background-color: var(--color-bg-elevated) !important;
}

.card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  letter-spacing: -0.01em;
}

.form-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-input) !important;
  background-color: var(--color-bg-input) !important;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
  font-family: inherit;
}

.form-input:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-secondary) !important;
  background-color: var(--color-bg-secondary) !important;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-bg-secondary) !important;
  background-color: var(--color-bg-secondary) !important;
  box-shadow: 0 0 0 3px var(--color-accent-bg), var(--shadow-sm);
}

.form-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.form-error {
  color: #ff4444;
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* ============================================
   Utilities
   ============================================ */

.text-center {
  text-align: center;
}

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Auth Panel
   ============================================ */

.auth-panel {
  animation: fadeIn var(--transition-base);
}

.auth-panel .card {
  border: 1px solid var(--color-border);
}

.auth-panel .card h2 {
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-xl);
}

/* ============================================
   Tabs
   ============================================ */

.tab-button {
  transition: all var(--transition-base);
  position: relative;
}

.tab-button:hover:not(.active) {
  background-color: var(--color-bg-secondary) !important;
  color: var(--color-text-primary) !important;
}

.tab-button.active {
  background: var(--color-bg-tab) !important;
  background-color: var(--color-bg-tab) !important;
}

/* ============================================
   Scrollbar
   ============================================ */

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-bg-primary);
}

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

/* ============================================
   Selection
   ============================================ */

::selection {
  background-color: var(--color-accent-bg);
  color: var(--color-accent);
}

::-moz-selection {
  background-color: var(--color-accent-bg);
  color: var(--color-accent);
}

/* ============================================
   Focus
   ============================================ */

*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .card {
    padding: var(--spacing-lg);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9375rem;
  }
  
  .navbar-nav {
    gap: var(--spacing-sm);
  }
}