/* ============================================
   MODERN DESIGN SYSTEM - KM RETIRO APP
   ============================================ */

:root {
  /* Primary Colors */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  
  /* Success Colors */
  --success-color: #10b981;
  --success-dark: #059669;
  --success-light: #34d399;
  
  /* Danger/Error Colors */
  --danger-color: #ef4444;
  --danger-dark: #dc2626;
  --danger-light: #f87171;
  
  /* Warning Colors */
  --warning-color: #f59e0b;
  --warning-dark: #d97706;
  --warning-light: #fbbf24;
  
  /* Neutral Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'Menlo', 'Monaco', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --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-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.centered-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.centered-container.alt {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.centered-container.success {
  background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
}

/* ============================================
   FORM CONTAINERS
   ============================================ */

.form-container {
  width: 100%;
  max-width: 480px;
  padding: var(--spacing-xl);
  background-color: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.4s ease-out;
}

.form-container.compact {
  max-width: 350px;
  padding: var(--spacing-lg);
}

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

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

.form-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.5px;
}

.form-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.label {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.3px;
}

.label.required::after {
  content: '*';
  color: var(--danger-color);
  margin-left: 0.25rem;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

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

.form-group:last-child {
  margin-bottom: 0;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md);
  font-size: 1rem;
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: var(--bg-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
  cursor: pointer;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

/* Checkbox and Radio Styling */
input[type="checkbox"],
input[type="radio"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-right: var(--spacing-sm);
  cursor: pointer;
  accent-color: var(--primary-color);
}

.checkbox-group,
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.checkbox-item,
.radio-item {
  display: flex;
  align-items: center;
}

.checkbox-item label,
.radio-item label {
  margin: 0;
  margin-left: var(--spacing-sm);
  cursor: pointer;
  font-weight: 500;
  color: var(--text-primary);
}

/* ============================================
   BUTTONS
   ============================================ */

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

/* Success Button */
.btn-success {
  background-color: var(--success-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--success-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

/* Danger Button */
.btn-danger {
  background-color: var(--danger-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

/* Warning Button */
.btn-warning {
  background-color: var(--warning-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--warning-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-secondary);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

/* Logout Button */
.btn-logout {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
}

.btn-logout:hover:not(:disabled) {
  background-color: var(--danger-color);
  color: white;
  transform: translateY(-2px);
}

/* Full Width Button */
.btn-block {
  width: 100%;
}

/* Button Group */
.button-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.button-group.block {
  flex-direction: column;
}

.button-group.block .btn {
  width: 100%;
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */

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

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

.card-header {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

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

.card-footer {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-lg);
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */

.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--success-color);
  color: var(--success-dark);
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger-color);
  color: var(--danger-dark);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border: 1px solid var(--warning-color);
  color: var(--warning-dark);
}

.alert-info {
  background-color: rgba(37, 99, 235, 0.1);
  border: 1px solid var(--primary-color);
  color: var(--primary-dark);
}

/* ============================================
   UTILITIES
   ============================================ */

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

.text-muted {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-text {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.hidden {
  display: none;
}

.invisible {
  visibility: hidden;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  .form-container {
    max-width: 100%;
    padding: var(--spacing-lg);
  }

  .form-container.compact {
    max-width: 100%;
  }

  .form-title {
    font-size: 1.5rem;
  }

  .button-group {
    flex-direction: column;
  }

  .button-group.block .btn {
    width: 100%;
  }

  .btn {
    padding: var(--spacing-md);
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .centered-container {
    padding: var(--spacing-sm);
  }

  .form-container {
    padding: var(--spacing-md);
  }

  .form-title {
    font-size: 1.25rem;
  }

  .form-subtitle {
    font-size: 0.85rem;
  }

  .button-group {
    gap: var(--spacing-sm);
  }

  .btn {
    padding: var(--spacing-md) var(--spacing-md);
    font-size: 0.95rem;
  }
}