/* ============================================
   O PROBLEMA INVISÍVEL - Design System
   Premium, confiável, profissional
   ============================================ */

/* === IMPORTS === */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* === DESIGN TOKENS === */
:root {
  /* Colors - Trust & Clarity Palette */
  --color-primary: #1a56db;
  --color-primary-dark: #0f3a94;
  --color-primary-light: #3b7aef;
  --color-secondary: #059669;
  --color-secondary-dark: #047857;
  --color-accent: #f59e0b;
  --color-danger: #dc2626;
  --color-warning: #f59e0b;
  --color-success: #059669;
  
  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-bg-dark: #111827;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  
  /* Text */
  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-text-inverse: #ffffff;
  
  /* Borders */
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --color-border-dark: #d1d5db;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1a56db 0%, #3b7aef 100%);
  --gradient-success: linear-gradient(135deg, #059669 0%, #10b981 100%);
  --gradient-hero: linear-gradient(135deg, #0f3a94 0%, #1a56db 50%, #3b7aef 100%);
  
  /* Shadows */
  --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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 40px rgba(26, 86, 219, 0.4);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* 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: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --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);
  
  /* Layout */
  --container-max: 1280px;
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
}

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--font-weight-bold);
}

h4 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

section {
  padding: var(--spacing-3xl) 0;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border-dark);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-secondary);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background: var(--gradient-success);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

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

.btn-lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

/* === CARDS === */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-glass {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card-elevated {
  box-shadow: var(--shadow-lg);
}

/* === BADGES & PILLS === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background: rgba(26, 86, 219, 0.1);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(5, 150, 105, 0.1);
  color: var(--color-secondary);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.badge-danger {
  background: rgba(220, 38, 38, 0.1);
  color: var(--color-danger);
}

/* === ALERTS === */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  margin-bottom: var(--spacing-lg);
}

.alert-info {
  background: rgba(26, 86, 219, 0.05);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.alert-success {
  background: rgba(5, 150, 105, 0.05);
  border-color: var(--color-secondary);
  color: var(--color-secondary-dark);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.05);
  border-color: var(--color-warning);
  color: #b45309;
}

.alert-danger {
  background: rgba(220, 38, 38, 0.05);
  border-color: var(--color-danger);
  color: #991b1b;
}

/* === INPUTS === */
.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

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

/* === UTILITIES === */
.text-center {
  text-align: center;
}

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

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

.mt-auto {
  margin-top: auto;
}

.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); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  section {
    padding: var(--spacing-2xl) 0;
  }
  
  .btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
  
  .card {
    padding: var(--spacing-lg);
  }
}

/* === LOADING STATES === */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.6;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}

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

.spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.6s linear infinite;
}