/**
 * VELAPONT.RO - Main Stylesheet
 * Design modern, responsive, optimizat pentru performanță
 *
 * Cuprins:
 * 1. Variables & Root
 * 2. Reset & Base Styles
 * 3. Typography
 * 4. Layout & Grid
 * 5. Header & Navigation
 * 6. Footer
 * 7. Buttons & CTAs
 * 8. Cards & Components
 * 9. Hero Section
 * 10. Forms
 * 11. Utilities
 * 12. Animations
 */

/* ==================================================
   1. VARIABLES & ROOT
   ================================================== */
:root {
  /* Culori Principale - Varianta 1 Aprobată */
  --color-primary: #DC1F26;        /* Roșu logo */
  --color-primary-dark: #B71C22;   /* Roșu închis (hover) */
  --color-primary-light: #E94B51;  /* Roșu deschis (accente) */

  --color-secondary: #0A4D8C;      /* Albastru engineering */
  --color-secondary-dark: #083A6A; /* Albastru închis */
  --color-secondary-light: #0D6BB8; /* Albastru deschis */

  --color-dark: #2C3E50;           /* Gri închis (text principal) */
  --color-dark-alt: #34495E;       /* Gri mediu */

  --color-light: #F8F9FA;          /* Background deschis */
  --color-white: #FFFFFF;

  --color-success: #28A745;        /* Verde certificări */
  --color-warning: #FFC107;
  --color-danger: #DC3545;

  --color-text: #2C3E50;           /* Text principal */
  --color-text-light: #6C757D;     /* Text secundar */
  --color-text-muted: #6B7280;     /* Text dezactivat (WCAG AA 5.0:1) */

  --color-border: #DEE2E6;
  --color-shadow: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Montserrat', 'Inter', sans-serif;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */

  /* Border Radius */
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 var(--color-shadow);
  --shadow-md: 0 4px 6px -1px var(--color-shadow);
  --shadow-lg: 0 10px 15px -3px var(--color-shadow);
  --shadow-xl: 0 20px 25px -5px var(--color-shadow);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Container */
  --container-max-width: 1200px;
  --container-padding: var(--spacing-md);

  /* Header */
  --header-height: 80px;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* ==================================================
   3. TYPOGRAPHY
   ================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-dark);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

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

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

strong, b {
  font-weight: var(--font-weight-bold);
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--font-size-sm);
}

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

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

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-md) * -0.5);
}

.col {
  flex: 1;
  padding: 0 calc(var(--spacing-md) * 0.5);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Section Spacing */
section {
  padding: var(--spacing-4xl) 0;
}

section.section-sm { padding: var(--spacing-2xl) 0; }
section.section-lg { padding: var(--spacing-4xl) 0; }

/* ==================================================
   5. HEADER & NAVIGATION
   ================================================== */
.header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  height: 50px;
  width: auto;
  transition: transform var(--transition-base);
}

.header__logo:hover {
  transform: scale(1.05);
}

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

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-primary);
  text-decoration: none;
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Dropdown Menu */
.nav__item--dropdown {
  position: relative;
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  list-style: none;
  padding: var(--spacing-sm) 0;
  margin: 0;
  z-index: var(--z-dropdown);
}

.nav__item--dropdown:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-dark);
  transition: background-color var(--transition-fast);
}

.nav__dropdown-link:hover {
  background-color: var(--color-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-light);
  border-radius: var(--radius-md);
}

.lang-switcher__btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
}

.lang-switcher__btn.active {
  color: var(--color-white);
  background-color: var(--color-primary);
}

.lang-switcher__btn:hover:not(.active) {
  color: var(--color-primary);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav__toggle-bar {
  width: 25px;
  height: 3px;
  background-color: var(--color-dark);
  transition: all var(--transition-base);
  border-radius: var(--radius-sm);
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ==================================================
   6. FOOTER
   ================================================== */
.footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer a {
  color: var(--color-white);
}

.footer a:hover {
  color: var(--color-primary-light);
}

.footer__top {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__section h4 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

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

.footer__list li {
  margin-bottom: var(--spacing-sm);
}

.footer__contact p {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.footer__contact svg,
.footer__contact i {
  color: var(--color-primary);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

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

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background-color: var(--color-primary);
  transform: translateY(-3px);
}

/* ==================================================
   7. BUTTONS & CTAs
   ================================================== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  line-height: 1.5;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: var(--color-white);
}

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

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: var(--color-white);
}

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

.btn-outline:hover {
  color: var(--color-white);
  background-color: var(--color-primary);
  text-decoration: none;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* WhatsApp Floating Button */
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  animation: pulse 2s infinite;
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(37, 211, 102, 0.4);
  text-decoration: none;
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
  fill: var(--color-white);
  flex-shrink: 0;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 4px 8px rgba(37, 211, 102, 0.3);
  }
  50% {
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.5);
  }
}

/* ==================================================
   8. CARDS & COMPONENTS
   ================================================== */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card__image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card__content {
  padding: var(--spacing-lg);
}

.card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--color-dark);
}

.card__text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.card__footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-light);
}

/* Stats Card */
.stat-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.stat-card__number {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-card__label {
  font-size: var(--font-size-lg);
  opacity: 0.9;
}

/* Service Card */
.service-card {
  text-align: center;
  padding: var(--spacing-2xl);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.service-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-full);
  color: var(--color-white);
  font-size: var(--font-size-4xl);
}

/* ==================================================
   9. HERO SECTION
   ================================================== */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../images/poduri/09 Viaduct Calimanesti Valea Postei DN 7 km 198+136.JPG');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 700px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  line-height: 1.2;
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  line-height: var(--line-height-relaxed);
}

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

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-dark);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-dark);
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(220, 31, 38, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
}

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

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

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

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

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

/* ==================================================
   12. ANIMATIONS
   ================================================== */
.fade-in {
  animation: fadeIn 0.6s ease-in;
}

.slide-up {
  animation: slideUp 0.6s ease-out;
}

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll Reveal Classes */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}