/* ============================================
   GlobalPeople Design Tokens & CSS Variables
   ============================================
   Basado en: CLAUDE.md - Brand Guidelines
   Autor: GlobalPeople Design System
   ============================================ */

:root {
  /* ===== TYPOGRAPHY ===== */
  --font-family-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-family-secondary: "Sora", "Inter", sans-serif;
  --font-family-mono: "JetBrains Mono", "Courier New", monospace;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Font Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 32px;
  --font-size-5xl: 36px;
  --font-size-6xl: 48px;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
  --line-height-loose: 1.8;

  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.01em;

  /* ===== COLORS - LIGHT MODE ===== */
  /* Primary Blues */
  --color-primary: #2563EB;
  --color-primary-dark: #1E3A8A;
  --color-primary-light: #3B82F6;

  /* Grays */
  --color-gray-900: #0F172A;
  --color-gray-800: #1E293B;
  --color-gray-700: #334155;
  --color-gray-600: #475569;
  --color-gray-500: #64748B;
  --color-gray-400: #94A3B8;
  --color-gray-300: #CBD5E1;
  --color-gray-200: #E2E8F0;
  --color-gray-100: #F1F5F9;
  --color-gray-50: #F8FAFC;

  /* Semantic Colors */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* Light Mode */
  --color-background: #FFFFFF;
  --color-background-secondary: #F8FAFC;
  --color-text-primary: #0F172A;
  --color-text-secondary: #334155;
  --color-text-tertiary: #64748B;
  --color-border: #E2E8F0;

  /* ===== SPACING (8px Grid) ===== */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* ===== BORDER RADIUS ===== */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* ===== 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;

  /* ===== Z-INDEX ===== */
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-fixed: 750;
  --z-modal-backdrop: 1000;
  --z-modal: 1100;
  --z-popover: 1200;
  --z-tooltip: 1300;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0F172A;
    --color-background-secondary: #1E293B;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #CBD5E1;
    --color-text-tertiary: #94A3B8;
    --color-border: #334155;
    --color-primary-light: #60A5FA;
  }
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-secondary);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  margin: 0;
  padding: 0;
}

h1 {
  font-size: var(--font-size-6xl);
}

h2 {
  font-size: var(--font-size-5xl);
}

h3 {
  font-size: var(--font-size-4xl);
}

h4 {
  font-size: var(--font-size-3xl);
}

h5 {
  font-size: var(--font-size-2xl);
}

h6 {
  font-size: var(--font-size-xl);
}

p {
  margin: 0;
  padding: 0;
}

/* Text Utilities */
.text-primary {
  color: var(--color-text-primary);
}

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

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

.text-muted {
  color: var(--color-gray-500);
}

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

.btn {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-block;
  white-space: nowrap;
  user-select: none;
}

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

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

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

.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
  transform: scale(0.98);
}

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

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-gray-100);
  border-color: var(--color-primary);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: rgba(37, 99, 235, 0.1);
}

/* Button Sizes */
.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

.btn-md {
  padding: 12px 24px;
  font-size: var(--font-size-base);
}

.btn-lg {
  padding: 14px 32px;
  font-size: var(--font-size-lg);
}

/* ============================================
   FORMS
   ============================================ */

input,
textarea,
select {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
textarea,
select {
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

/* ============================================
   NAVBAR & HEADER
   ============================================ */

.navbar {
  padding: var(--spacing-md) 0;
  box-shadow: var(--shadow-sm);
}

.navbar-brand img {
  height: auto;
  max-width: 100%;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--color-gray-50);
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  footer {
    background-color: var(--color-gray-900);
  }
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: #FFFFFF;
  transition: all var(--transition-base);
  margin-right: var(--spacing-sm);
}

.footer-social a:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-4px);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.border-top {
  border-top: 1px solid var(--color-border);
}

.border-bottom {
  border-bottom: 1px solid var(--color-border);
}

.rounded-circle {
  border-radius: var(--radius-full);
}

.list-unstyled {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-inline {
  display: flex;
  gap: var(--spacing-md);
}

.list-inline-item {
  display: inline;
}

/* Spacing Utilities */
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.me-1 { margin-right: var(--spacing-xs); }
.me-2 { margin-right: var(--spacing-sm); }
.me-3 { margin-right: var(--spacing-md); }

.ms-3 { margin-left: var(--spacing-md); }
.ms-auto { margin-left: auto; }

.py-3 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }

/* Display Utilities */
.d-flex {
  display: flex;
}

.d-inline-block {
  display: inline-block;
}

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

.justify-content-center {
  justify-content: center;
}

.text-lg-end {
  text-align: right;
}

/* Responsive Utilities */
.text-decoration-none {
  text-decoration: none;
}

.g-4 {
  gap: var(--spacing-lg);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: more) {
  :root {
    --color-border: #000;
  }

  .btn-primary {
    border: 2px solid var(--color-primary-dark);
  }
}

/* Print Styles */
@media print {
  .navbar,
  footer,
  .go-top {
    display: none;
  }
}