/**
 * Theme System for In-Hand Salary Calculator
 * Converted from React Tailwind CSS to vanilla CSS
 */

:root {
  /* Light theme colors */
  --background: hsl(210, 25%, 98%);
  --foreground: hsl(222.2, 84%, 4.9%);
  
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(222.2, 84%, 4.9%);
  
  --popover: hsl(0, 0%, 100%);
  --popover-foreground: hsl(222.2, 84%, 4.9%);
  
  --primary: hsl(214, 84%, 56%);
  --primary-foreground: hsl(0, 0%, 98%);
  
  --secondary: hsl(210, 40%, 96.1%);
  --secondary-foreground: hsl(222.2, 47.4%, 11.2%);
  
  --muted: hsl(210, 40%, 96.1%);
  --muted-foreground: hsl(215.4, 16.3%, 46.9%);
  
  --accent: hsl(142, 76%, 36%);
  --accent-foreground: hsl(0, 0%, 98%);
  
  --destructive: hsl(0, 84.2%, 60.2%);
  --destructive-foreground: hsl(210, 40%, 98%);
  
  --border: hsl(214.3, 31.8%, 91.4%);
  --input: hsl(214.3, 31.8%, 91.4%);
  --ring: hsl(214, 84%, 56%);
  
  --radius: 0.75rem;
  
  /* Gradient colors */
  --gradient-from: hsl(219, 78%, 85%);
  --gradient-via: hsl(0, 0%, 100%);
  --gradient-to: hsl(142, 76%, 90%);
}

[data-theme="dark"] {
  /* Dark theme colors */
  --background: hsl(222.2, 84%, 4.9%);
  --foreground: hsl(210, 40%, 98%);
  
  --card: hsl(222.2, 84%, 4.9%);
  --card-foreground: hsl(210, 40%, 98%);
  
  --popover: hsl(222.2, 84%, 4.9%);
  --popover-foreground: hsl(210, 40%, 98%);
  
  --primary: hsl(214, 84%, 56%);
  --primary-foreground: hsl(222.2, 47.4%, 11.2%);
  
  --secondary: hsl(217.2, 32.6%, 17.5%);
  --secondary-foreground: hsl(210, 40%, 98%);
  
  --muted: hsl(217.2, 32.6%, 17.5%);
  --muted-foreground: hsl(215, 20.2%, 65.1%);
  
  --accent: hsl(142, 76%, 36%);
  --accent-foreground: hsl(210, 40%, 98%);
  
  --destructive: hsl(0, 62.8%, 30.6%);
  --destructive-foreground: hsl(210, 40%, 98%);
  
  --border: hsl(217.2, 32.6%, 17.5%);
  --input: hsl(217.2, 32.6%, 17.5%);
  --ring: hsl(214, 84%, 56%);
  
  /* Dark gradient colors */
  --gradient-from: hsl(222.2, 84%, 4.9%);
  --gradient-via: hsl(217.2, 32.6%, 17.5%);
  --gradient-to: hsl(222.2, 84%, 4.9%);
}

/* Base styles */
* {
  border-color: var(--border);
}

body {
  background-color: var(--background);
  color: var(--foreground);
  transition: background-color 0.3s ease, color 0.3s ease;
  font-family: ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Button variants */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.btn:disabled {
  pointer-events: none;
  opacity: 0.5;
}

.btn-default {
  background-color: var(--primary);
  color: var(--primary-foreground);
  height: 2.5rem;
  padding: 0.5rem 1rem;
}

.btn-default:hover {
  background-color: hsl(214, 84%, 50%);
}

/* Fallback for browsers that don't support hsl() with custom properties */
@supports not (background-color: hsl(from var(--primary) h s calc(l * 0.9))) {
  .btn-default:hover {
    background-color: #2563eb;
  }
  
  .btn-secondary:hover {
    background-color: #e2e8f0;
  }
  
  [data-theme="dark"] .btn-secondary:hover {
    background-color: #334155;
  }
}

.btn-outline {
  border: 1px solid var(--input);
  background-color: var(--background);
  color: var(--foreground);
  height: 2.5rem;
  padding: 0.5rem 1rem;
}

.btn-outline:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.btn-icon {
  height: 2.5rem;
  width: 2.5rem;
  padding: 0;
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
  height: 2.5rem;
  padding: 0.5rem 1rem;
}

.btn-secondary:hover {
  background-color: #e2e8f0;
}

[data-theme="dark"] .btn-secondary:hover {
  background-color: #334155;
}

.btn-ghost {
  background-color: transparent;
  color: var(--foreground);
  height: 2.5rem;
  padding: 0.5rem 1rem;
}

.btn-ghost:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

/* Card styles */
.card {
  background-color: var(--card) !important;
  color: var(--card-foreground);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  box-sizing: border-box;
  overflow: hidden;
}

[data-theme="dark"] .card {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Input styles */
.input {
  display: flex;
  height: 2.5rem;
  width: 100%;
  border-radius: 0.375rem;
  border: 1px solid var(--input);
  background-color: var(--background);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--foreground);
  transition: border-color 0.2s ease;
  box-sizing: border-box;
  max-width: 100%;
}

.input:focus {
  outline: none;
  border-color: var(--ring);
  box-shadow: 0 0 0 2px hsl(214, 84%, 56%, 0.2);
}

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

/* Select styles */
.select {
  display: flex;
  height: 2.5rem;
  width: 100%;
  border-radius: 0.375rem;
  border: 1px solid var(--input);
  background-color: var(--background);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--foreground);
  cursor: pointer;
  transition: border-color 0.2s ease;
  box-sizing: border-box;
  max-width: 100%;
}

.select:focus {
  outline: none;
  border-color: var(--ring);
  box-shadow: 0 0 0 2px hsl(214, 84%, 56%, 0.2);
}

/* Dropdown styles */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 50;
  min-width: 8rem;
  overflow: hidden;
  border-radius: 0.375rem;
  border: 1px solid var(--border);
  background-color: var(--popover);
  color: var(--popover-foreground);
  padding: 0.25rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  display: none;
}

.dropdown-content.show {
  display: block;
}

.dropdown-item {
  position: relative;
  display: flex;
  cursor: pointer;
  user-select: none;
  align-items: center;
  border-radius: 0.125rem;
  padding: 0.375rem 0.5rem;
  font-size: 0.875rem;
  outline: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  color: var(--popover-foreground);
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.dropdown-item:disabled {
  pointer-events: none;
  opacity: 0.5;
}

/* Radio button styles */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.radio-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  background-color: var(--card);
  transition: border-color 0.2s ease;
}

.radio-item:hover {
  border-color: var(--ring);
}

.radio-item input[type="radio"] {
  margin-top: 0.125rem;
  flex-shrink: 0;
}

.radio-item label {
  font-weight: 500;
  display: block;
  margin-bottom: 0.25rem;
  cursor: pointer;
  color: var(--foreground);
}

.radio-item p {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin: 0;
}

/* Gradient backgrounds */
.gradient-bg {
  background: linear-gradient(135deg, var(--gradient-from) 0%, var(--gradient-via) 50%, var(--gradient-to) 100%);
  min-height: 100vh;
}

/* Text colors */
.text-muted {
  color: var(--muted-foreground);
}

.text-primary {
  color: var(--primary);
}

.text-secondary {
  color: var(--secondary-foreground);
}

/* Gradient text */
.gradient-text {
  background: linear-gradient(to right, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* Ensure gradient text works in dark mode */
[data-theme="dark"] .gradient-text {
  background: linear-gradient(to right, hsl(214, 84%, 66%), hsl(142, 76%, 46%));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

/* Theme toggle specific styles */
.theme-toggle {
  position: relative;
  display: inline-block;
}

.theme-toggle-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  border: 1px solid var(--input);
  background-color: var(--background);
  color: var(--foreground);
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
  border-color: var(--accent);
}

.theme-toggle-btn svg {
  width: 1.2rem;
  height: 1.2rem;
  transition: all 0.3s ease;
}

.theme-toggle-btn .sun-icon {
  transform: rotate(0deg) scale(1);
}

.theme-toggle-btn .moon-icon {
  position: absolute;
  transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .theme-toggle-btn .sun-icon {
  transform: rotate(-90deg) scale(0);
}

[data-theme="dark"] .theme-toggle-btn .moon-icon {
  transform: rotate(0deg) scale(1);
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 0.25rem);
  right: 0;
  z-index: 50;
  min-width: 8rem;
  overflow: hidden;
  border-radius: 0.375rem;
  border: 1px solid var(--border);
  background-color: var(--popover);
  color: var(--popover-foreground);
  padding: 0.25rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  display: none;
}

.theme-dropdown.show {
  display: block;
}

.theme-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  width: 100%;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
  color: #374151;
  border-radius: 0.125rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  text-align: left;
}

[data-theme="dark"] .theme-dropdown-item {
  color: #f3f4f6;
}

.theme-dropdown-item:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

/* Currency selector styles */
.currency-selector {
  position: relative;
  display: inline-block;
}

.currency-selector-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--input);
  background-color: var(--background);
  color: var(--foreground);
  border-radius: 0.375rem;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.currency-selector-btn:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
  border-color: var(--accent);
}

.currency-dropdown {
  position: absolute;
  top: calc(100% + 0.25rem);
  right: 0;
  z-index: 50;
  min-width: 16rem;
  max-height: 20rem;
  overflow-y: auto;
  border-radius: 0.375rem;
  border: 1px solid var(--border);
  background-color: var(--popover);
  color: var(--popover-foreground);
  padding: 0.25rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  display: none;
}

.currency-dropdown.show {
  display: block;
}

.currency-group-label {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.currency-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  width: 100%;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--popover-foreground);
  border-radius: 0.125rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  text-align: left;
}

.currency-item:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.currency-symbol {
  font-family: monospace;
  font-weight: bold;
  min-width: 1.5rem;
}

.currency-details {
  flex: 1;
}

.currency-code {
  font-weight: 600;
}

.currency-country {
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

/* Responsive design */
@media (max-width: 768px) {
  .currency-dropdown {
    right: auto;
    left: 0;
    min-width: 14rem;
  }
  
  .theme-dropdown {
    right: auto;
    left: 0;
  }
}

/* Animation utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-0.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-0.5rem); }
}

.fade-in {
  animation: fadeIn 0.2s ease-out;
}

.fade-out {
  animation: fadeOut 0.2s ease-out;
}

/* Focus styles for accessibility */
.focus-visible:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* Scrollbar styles for dark theme */
[data-theme="dark"] ::-webkit-scrollbar {
  width: 8px;
}

[data-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--muted);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--muted-foreground);
  border-radius: 4px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background: var(--foreground);
}