/**
 * CARRO SYSTEMS - DESIGN SYSTEM V2
 * Modern, professional B2B SaaS design for automotive CRM
 *
 * Color Palette:
 * - Primary Blue: #1E3A8A (professional, trustworthy)
 * - Accent Orange: #EA8317 (energy, CTAs, highlights)
 * - Success Green: #10B981 (confirmations, benefits)
 * - Neutrals: Dark slate, light gray, white
 */

/* ============================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */

:root {
  /* Colors */
  --primary-blue: #1E3A8A;
  --primary-blue-light: #3B82F6;
  --primary-blue-dark: #1E40AF;

  --accent-orange: #EA8317;
  --accent-orange-light: #F97316;
  --accent-orange-dark: #D97706;

  --success-green: #10B981;
  --success-light: #D1FAE5;

  --danger-red: #EF4444;
  --warning-yellow: #FBBF24;

  /* Neutrals */
  --text-dark: #0F172A;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-light: #94A3B8;

  --bg-white: #FFFFFF;
  --bg-light: #F8FAFC;
  --bg-lighter: #F1F5F9;
  --bg-gray: #E2E8F0;
  --bg-dark: #0F172A;

  --border-color: #E2E8F0;
  --border-light: #F1F5F9;

  /* Typography */
  --font-family-sans: 'Inter', -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Fira Code', 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;
  --text-5xl: 48px;

  /* Font Weights */
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Spacing Scale */
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;
  --spacing-24: 96px;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-base: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;

  /* Container */
  --container-max-width: 1280px;
  --container-padding: 20px;
}

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

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  margin-bottom: var(--spacing-4);
  color: var(--text-dark);
}

h1 {
  font-size: var(--text-5xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-4xl);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
}

h5 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
}

h6 {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: var(--spacing-4);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

p.lead {
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
}

/* Text Utilities */
.text-muted {
  color: var(--text-light);
  font-size: var(--text-sm);
}

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

.text-orange {
  color: var(--accent-orange);
}

.text-success {
  color: var(--success-green);
}

/* ============================================
   LINKS
   ============================================ */

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

a:hover {
  color: var(--primary-blue-light);
  text-decoration: underline;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  font-family: var(--font-family-sans);
  font-weight: var(--weight-semibold);
  border: none;
  cursor: pointer;
  border-radius: var(--radius-base);
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

/* Primary Button (Blue) */
.btn-primary {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--text-base);
}

.btn-primary:hover {
  background-color: var(--primary-blue-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.btn-primary:active {
  background-color: var(--primary-blue-dark);
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Secondary Button (Blue border, transparent bg) */
.btn-secondary {
  background-color: transparent;
  color: var(--primary-blue);
  border: 2px solid var(--primary-blue);
  padding: calc(var(--spacing-3) - 2px) calc(var(--spacing-6) - 2px);
  font-size: var(--text-base);
}

.btn-secondary:hover {
  background-color: var(--primary-blue);
  color: var(--bg-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

/* CTA Button (Orange) - For high-conversion CTAs */
.btn-cta {
  background-color: var(--accent-orange);
  color: var(--bg-white);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
}

.btn-cta:hover {
  background-color: var(--accent-orange-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-cta:active {
  background-color: var(--accent-orange-dark);
  transform: translateY(0);
}

/* Text Button */
.btn-text {
  background-color: transparent;
  color: var(--primary-blue);
  padding: var(--spacing-2) 0;
}

.btn-text:hover {
  color: var(--accent-orange);
}

/* Button Sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--text-lg);
  min-height: 56px;
}

/* Button Groups */
.btn-group {
  display: flex;
  gap: var(--spacing-3);
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .btn-group {
    flex-direction: column;
  }

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

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

.form-group {
  margin-bottom: var(--spacing-6);
  display: flex;
  flex-direction: column;
}

label {
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
  font-size: var(--text-sm);
}

label .required {
  color: var(--danger-red);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="time"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-base);
  background-color: var(--bg-white);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 48px;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

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

/* Form validation states */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
  border-color: var(--danger-red);
}

.form-group.error input:focus,
.form-group.error textarea:focus,
.form-group.error select:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  color: var(--danger-red);
  font-size: var(--text-sm);
  margin-top: var(--spacing-2);
}

.form-success {
  color: var(--success-green);
  font-size: var(--text-sm);
  margin-top: var(--spacing-2);
}

/* Checkbox & Radio */
input[type="checkbox"],
input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--primary-blue);
}

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

.card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--primary-blue-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-header {
  margin-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--border-light);
  padding-bottom: var(--spacing-4);
}

.card-header h3 {
  margin-bottom: 0;
}

.card-body {
  margin-bottom: var(--spacing-4);
}

.card-body:last-child {
  margin-bottom: 0;
}

.card-footer {
  border-top: 1px solid var(--border-light);
  padding-top: var(--spacing-4);
  display: flex;
  gap: var(--spacing-3);
  justify-content: space-between;
}

/* ============================================
   CONTAINERS & LAYOUT
   ============================================ */

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

.container-narrow {
  max-width: 896px;
}

.container-wide {
  max-width: 1400px;
}

/* Sections */
.section {
  padding: var(--spacing-20) 0;
}

.section-sm {
  padding: var(--spacing-16) 0;
}

.section-lg {
  padding: var(--spacing-24) 0;
}

/* Alternating section backgrounds */
.section-light {
  background-color: var(--bg-light);
}

.section-white {
  background-color: var(--bg-white);
}

.section-dark {
  background-color: var(--bg-dark);
  color: var(--bg-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
  color: var(--bg-white);
}

.section-dark p {
  color: #CBD5E1;
}

/* ============================================
   GRIDS & FLEXBOX UTILITIES
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-cols-1 {
  grid-template-columns: 1fr;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

/* ============================================
   BADGES & LABELS
   ============================================ */

.badge {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}

.badge-primary {
  background-color: rgba(30, 58, 138, 0.1);
  color: var(--primary-blue);
}

.badge-success {
  background-color: var(--success-light);
  color: var(--success-green);
}

.badge-warning {
  background-color: rgba(251, 191, 36, 0.1);
  color: #D97706;
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-red);
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-base);
  margin-bottom: var(--spacing-4);
  display: flex;
  gap: var(--spacing-3);
}

.alert-info {
  background-color: rgba(30, 58, 138, 0.05);
  border-left: 4px solid var(--primary-blue);
  color: var(--primary-blue);
}

.alert-success {
  background-color: var(--success-light);
  border-left: 4px solid var(--success-green);
  color: var(--success-green);
}

.alert-warning {
  background-color: rgba(251, 191, 36, 0.1);
  border-left: 4px solid #FBBF24;
  color: #92400E;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border-left: 4px solid var(--danger-red);
  color: var(--danger-red);
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
  margin-bottom: var(--spacing-6);
  padding-left: var(--spacing-6);
}

li {
  margin-bottom: var(--spacing-2);
  line-height: var(--leading-relaxed);
}

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

.list-checked {
  list-style: none;
  padding-left: 0;
}

.list-checked li {
  padding-left: var(--spacing-8);
  position: relative;
}

.list-checked li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success-green);
  font-weight: var(--weight-bold);
}

/* ============================================
   IMAGES
   ============================================ */

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.img-fluid {
  width: 100%;
  height: auto;
}

.img-rounded {
  border-radius: var(--radius-lg);
}

.img-circle {
  border-radius: 50%;
}

.img-shadow {
  box-shadow: var(--shadow-md);
}

.img-border {
  border: 1px solid var(--border-color);
  padding: var(--spacing-2);
}

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

.d-none {
  display: none;
}

.d-block {
  display: block;
}

.d-flex {
  display: flex;
}

.d-grid {
  display: grid;
}

@media (max-width: 768px) {
  .d-md-none {
    display: none;
  }

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

  .d-md-flex {
    display: flex;
  }
}

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-12 { margin-top: var(--spacing-12); }

.px-1 { padding-left: var(--spacing-1); padding-right: var(--spacing-1); }
.px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }

.py-1 { padding-top: var(--spacing-1); padding-bottom: var(--spacing-1); }
.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-6 { padding-top: var(--spacing-6); padding-bottom: var(--spacing-6); }

/* ============================================
   MEDIA QUERIES - MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }
  h3 { font-size: var(--text-2xl); }

  .section {
    padding: var(--spacing-16) 0;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --spacing-20: 40px;
    --spacing-24: 48px;
  }

  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
  h4,
  h5,
  h6 { font-size: var(--text-base); }

  .section {
    padding: var(--spacing-12) 0;
  }

  .section-sm {
    padding: var(--spacing-8) 0;
  }

  .container {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }

  /* Button sizing for touch */
  .btn {
    min-height: 44px;
    padding: 10px 16px !important;
    font-size: 14px !important;
  }

  .btn-lg {
    min-height: 44px;
    padding: 12px 20px !important;
  }

  /* Grid adjustments */
  [class*="grid-cols-"] {
    grid-template-columns: 1fr !important;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr !important;
  }

  /* Link sizing */
  a {
    min-height: 44px;
    display: inline-block;
    padding: 8px 12px;
  }

  /* Form elements */
  input,
  select,
  textarea {
    font-size: 16px !important;
    padding: 12px !important;
    min-height: 44px;
  }

  /* Table responsiveness */
  table {
    font-size: 13px !important;
  }

  td,
  th {
    padding: 8px !important;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 22px; }
  h2 { font-size: 18px; }
  h3 { font-size: 16px; }
  h4,
  h5,
  h6 { font-size: 14px; }

  .section {
    padding: var(--spacing-6) 0;
  }

  .section-lg {
    padding: var(--spacing-8) 0;
  }

  .section-dark,
  .section-light {
    padding: var(--spacing-8) 0;
  }

  .card {
    padding: var(--spacing-3) !important;
  }

  .container {
    padding-left: 12px !important;
    padding-right: 12px !important;
  }

  /* Reduce spacing on small screens */
  .mb-12 { margin-bottom: var(--spacing-6) !important; }
  .mb-8 { margin-bottom: var(--spacing-4) !important; }
  .mb-6 { margin-bottom: var(--spacing-3) !important; }
  .mt-12 { margin-top: var(--spacing-6) !important; }
  .mt-8 { margin-top: var(--spacing-4) !important; }

  .p-12 { padding: var(--spacing-6) !important; }
  .p-8 { padding: var(--spacing-4) !important; }
  .p-6 { padding: var(--spacing-3) !important; }

  /* Stack flex items */
  .flex {
    flex-direction: column !important;
  }

  .flex-row {
    flex-direction: column !important;
  }

  .gap-8 { gap: var(--spacing-4) !important; }
  .gap-6 { gap: var(--spacing-3) !important; }

  /* Full width buttons */
  .btn,
  button,
  input[type="button"],
  input[type="submit"] {
    width: 100% !important;
    min-height: 44px;
  }

  /* Minimal padding lists */
  ul,
  ol {
    padding-left: 20px !important;
  }

  li {
    margin-bottom: 8px !important;
  }
}

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

/* Focus visible for keyboard navigation */
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-orange);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background-color: var(--primary-blue);
  color: white;
  padding: var(--spacing-3) var(--spacing-4);
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

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