/* RailCargoLogistiX - Main Stylesheet */
/* Industrial Railway Aesthetic with Professional Design */

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --rail-dark: #1E293B;
  --signal-red: #DC2626;
  --corporate-blue: #2563EB;
  --eco-green: #16A34A;
  --amber: #F59E0B;
  --light-bg: #F8FAFC;
  --white: #FFFFFF;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  
  /* Typography */
  --font-heading: 'Bebas Neue', 'Arial Black', sans-serif;
  --font-body: 'Source Sans Pro', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Layout */
  --container-max: 1280px;
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--gray-800);
  background-color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

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

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  color: var(--rail-dark);
  position: relative;
  display: inline-block;
}

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

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--signal-red), var(--corporate-blue));
  margin: var(--spacing-sm) auto 0;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 700px;
  margin: 0 auto;
}

.section-dark .section-subtitle {
  color: var(--gray-300);
}

/* ===== GRID SYSTEM ===== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ===== HEADER & NAVIGATION ===== */
.header {
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-top {
  background-color: var(--rail-dark);
  color: var(--white);
  padding: var(--spacing-xs) 0;
  font-size: 0.875rem;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.header-contact {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.header-contact a {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.header-contact a:hover {
  color: var(--amber);
}

.header-main {
  padding: var(--spacing-sm) 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--rail-dark);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--signal-red), var(--corporate-blue));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-menu a {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background-color: var(--rail-dark);
  color: var(--white);
}

.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--rail-dark);
  background: none;
  border: none;
  cursor: pointer;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background-color: var(--signal-red);
  color: var(--white);
  border-color: var(--signal-red);
}

.btn-primary:hover {
  background-color: #B91C1C;
  border-color: #B91C1C;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.btn-secondary {
  background-color: var(--corporate-blue);
  color: var(--white);
  border-color: var(--corporate-blue);
}

.btn-secondary:hover {
  background-color: #1D4ED8;
  border-color: #1D4ED8;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--rail-dark);
  border-color: var(--rail-dark);
}

.btn-outline:hover {
  background-color: var(--rail-dark);
  color: var(--white);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn-outline-light:hover {
  background-color: var(--white);
  color: var(--rail-dark);
}

/* ===== HERO SECTION ===== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--rail-dark) 0%, #0F172A 100%);
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(255,255,255,0.03) 50px, rgba(255,255,255,0.03) 100px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  flex-wrap: wrap;
}

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

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--amber);
  display: block;
}

.hero-stat-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.8;
}

/* ===== CARDS ===== */
.card {
  background-color: var(--white);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.card-icon.red {
  background-color: rgba(220, 38, 38, 0.1);
  color: var(--signal-red);
}

.card-icon.blue {
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--corporate-blue);
}

.card-icon.green {
  background-color: rgba(22, 163, 74, 0.1);
  color: var(--eco-green);
}

.card-icon.amber {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--amber);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--gray-600);
  margin-bottom: var(--spacing-md);
}

/* ===== METRICS DASHBOARD ===== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
}

.metric-card {
  background: linear-gradient(135deg, var(--white) 0%, var(--gray-100) 100%);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  border-left: 4px solid var(--signal-red);
  transition: var(--transition);
}

.metric-card:nth-child(2) {
  border-left-color: var(--corporate-blue);
}

.metric-card:nth-child(3) {
  border-left-color: var(--eco-green);
}

.metric-card:nth-child(4) {
  border-left-color: var(--amber);
}

.metric-card:nth-child(5) {
  border-left-color: var(--signal-red);
}

.metric-card:nth-child(6) {
  border-left-color: var(--corporate-blue);
}

.metric-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.metric-value {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--rail-dark);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.metric-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-600);
  font-weight: 600;
}

/* ===== TABLE STYLES ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.data-table thead {
  background-color: var(--rail-dark);
  color: var(--white);
}

.data-table th,
.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.data-table th {
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.data-table tbody tr:hover {
  background-color: var(--gray-100);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem var(--spacing-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius);
  transition: var(--transition);
  background-color: var(--white);
}

.form-control:focus {
  outline: none;
  border-color: var(--corporate-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
  color: var(--gray-600);
}

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

select.form-control {
  cursor: pointer;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-error {
  color: var(--signal-red);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-control.error {
  border-color: var(--signal-red);
}

.form-control.error ~ .form-error {
  display: block;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--rail-dark);
  color: var(--white);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--amber);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  opacity: 0.9;
  transition: var(--transition);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--amber);
  padding-left: var(--spacing-xs);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icon:hover {
  background-color: var(--amber);
  transform: translateY(-3px);
}

/* ===== COOKIE BANNER ===== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--rail-dark);
  color: var(--white);
  padding: var(--spacing-md);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.cookie-banner.show {
  transform: translateY(0);
}

.cookie-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.cookie-text {
  flex: 1;
  min-width: 250px;
}

.cookie-text p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

.cookie-text a {
  color: var(--amber);
  text-decoration: underline;
}

.cookie-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ===== MODAL ===== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 10000;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal.show {
  display: flex;
}

.modal-content {
  background-color: var(--white);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  max-width: 500px;
  width: 100%;
  position: relative;
  animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  font-size: 1.5rem;
  color: var(--gray-600);
  cursor: pointer;
  background: none;
  border: none;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.modal-close:hover {
  background-color: var(--gray-200);
  color: var(--rail-dark);
}

.modal-header {
  margin-bottom: var(--spacing-md);
}

.modal-title {
  font-size: 1.75rem;
  color: var(--rail-dark);
}

.modal-body {
  margin-bottom: var(--spacing-lg);
}

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

.text-red {
  color: var(--signal-red);
}

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

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

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

.bg-red {
  background-color: var(--signal-red);
}

.bg-blue {
  background-color: var(--corporate-blue);
}

.bg-green {
  background-color: var(--eco-green);
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden {
  display: none;
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--white);
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-xl) var(--spacing-lg);
    transition: right 0.3s ease;
    z-index: 9999;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .cookie-content {
    flex-direction: column;
    text-align: center;
  }
  
  .cookie-actions {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
  }
  
  .metrics-grid {
    grid-template-columns: 1fr;
  }
}