/* ============================================
   TITAN Environmental Platform - Styles
   ============================================ */

/* CSS Custom Properties */


@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');

:root {

  --color-navy: hsl(220, 30%, 15%);
  --color-teal: hsl(174, 72%, 40%);
  --color-teal-light: hsl(174, 72%, 56%);
  --color-teal-bright: hsl(174, 100%, 42%);
  --color-dark: hsl(210, 40%, 12%);
  --color-white: #ffffff;
  --color-black: #000000;
  
  --hero-bg: rgba(35, 192, 171, 0.8);
  --card-bg: rgba(111, 120, 177, 0.6);
  --card-bg-hover: rgba(111, 120, 177, 0.75);
  
  --font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  --sidebar-width: 510px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --container-padding: 1.5rem;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-white);
  background-color: var(--color-dark);
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Page Layout */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-container {
  position: relative;
  min-height: 100vh;
  width: 100%;
}

/* Background */
.background-image {
  position: absolute;
  inset: 0;
  background-image: url('../images/home.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}

/* Background for inner pages (pages/ folder) */
.background-image--page {
  background-image: url('../images/homepage.jpg');
}

.background-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    hsla(220, 45%, 25%, 0.72) 0%,
    hsla(210, 40%, 28%, 0.68) 50%,
    hsla(200, 35%, 32%, 0.62) 100%
  );
}

/* Sidebar */
.sidebar {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  min-height: 100%;
  z-index: 50;
  display: flex;
  flex-direction: column;
  padding-bottom: 2rem;
}

/* Logo */
.logo-container {
  padding: 2rem 1.5rem 1.5rem;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: opacity var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.9;
}



.logo-text {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-white);
}






/* Navigation */
.sidebar-nav {
  padding: 1.5rem 1rem;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.nav-link {
display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: bold;
    padding: 0.625rem 1rem;
    font-size: 15px;
    color: #fff;
    transition: color var(--transition-fast);
    border-radius: 4px;
}

.nav-link:hover {
  color: #73b943;
}


.nav-link.active {
  color: #73b943;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.nav-link.active .nav-dot {
  background: #73b943;
}

.nav-link:hover .nav-dot {
  background: rgba(255, 255, 255, 0.6);
}

.nav-link.active:hover .nav-dot {
  background: var(--color-teal-light);
}

/* Hero Box */
.hero-box {
  background-color: #0066b1;
  color: var(--color-white);
  padding: 3.1875rem 13.5% 4rem 12%;
  max-width: 660px;
  margin-top: 230px;
  opacity: 0;
  transform: translateX(-30px);
  animation: slideInLeft 0.6s ease-out 0.3s forwards;
}

.hero-box-wrapper {
  flex: 1;
  display: flex;
  align-items: flex-end;
  padding-bottom: 5rem;
}

@keyframes slideInLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-line {
  width: 60px;
  height: 2px;
  background: rgba(255, 255, 255, 0.5);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 1.625rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.hero-text {
  font-size: 0.8125rem;
  line-height: 1.7;
  opacity: 0.92;
  font-weight: 400;
}

/* Content Page Styles */
.content-box {
  max-width: 720px;
  padding: 2.5rem 10% 3rem 10%;
}

.content-title {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.content-body {
  font-size: 0.875rem;
  line-height: 1.8;
}

.content-body p {
  margin-bottom: 1.25rem;
  opacity: 0.95;
}

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

.content-body strong {
  font-weight: 600;
}

.content-list {
  margin: 1.25rem 0 1.5rem 0;
  padding-left: 0;
}

.content-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.875rem;
  opacity: 0.95;
}

.content-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  background-color: var(--color-white);
  border-radius: 50%;
  opacity: 0.7;
}

.content-list li:last-child {
  margin-bottom: 0;
}

/* Content page main area adjustment */
.main-content.content-page {
  min-height: 50vh;
}

/* Main Content */
.main-content {
  position: relative;
  z-index: 10;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem;
}

/* Section Header */
.section-header {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeIn 0.5s ease-out 0.2s forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 18px;
  color: #fff;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 900px;
  margin-bottom: 4rem;
}

/* Metric Card */
.metric-card {
  background-color: #22326e;

  padding: 2.125rem 0.875rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 180px;
  transition: background-color var(--transition-normal), transform var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
}

.metric-card.animated {
  opacity: 0.8;
  transform: translateY(0);
}

.metric-card:hover {
  transform: translateY(-2px);
}

.metric-card:focus-within {
  outline: 2px solid var(--color-teal-light);
  outline-offset: 2px;
}

.metric-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.metric-icon svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.metric-title {
 font-size: 0.9125rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
    color: #73b943;
    letter-spacing: 0.01em; 
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.metric-unit {
  font-size: 1rem;
  font-weight: 400;
}

.metric-subtitle {
font-size: 0.7875rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.45;
    margin-top: 0.5rem;
    max-width: 170px;
}

/* Footer */
.footer {
  background-color: var(--color-white);
  padding: 1rem 1.5rem;
  width: 100%;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-link {
  color: rgba(0, 0, 0, 0.35);
  font-size: 0.6875rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: rgba(0, 0, 0, 0.6);
}

.footer-link:focus {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer-divider {
  color: rgba(0, 0, 0, 0.2);
  font-size: 0.6875rem;
}

.footer-copyright {
  color: rgba(0, 0, 0, 0.5);
  font-size: 0.6875rem;
}

.footer-copyright strong {
  font-weight: 600;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 320px;
  }
  
  .hero-box {
    padding: 2rem 8% 2.5rem 8%;
    max-width: 100%;
  }
  
  .hero-title {
    font-size: 1.375rem;
  }
  
  .metrics-grid {
    gap: 0.75rem;
  }
  
  .metric-card {
    padding: 1.5rem 0.75rem;
    min-height: 160px;
  }
  
  .metric-value {
    font-size: 1.75rem;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }
  
  .main-container {
    display: flex;
    flex-direction: column;
  }
  
  .sidebar {
       position: relative;
    width: 100%;
    min-height: auto;
    padding-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-right: 1.5rem;
    flex-direction: row;
  }
  
  .sidebar-nav {
    display: none;
  }
  
  .hero-box {
    margin-top: 0;
    padding: 2rem 1.5rem;
  }
  
  .hero-title {
    font-size: 1.25rem;
  }
  
  .main-content {
    margin-left: 0;
    padding: 2rem 1rem;
    min-height: auto;
  }
  
  .section-header {
    padding-left: 0;
    text-align: center;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    max-width: 100%;
  }
  
  .metric-card {
    padding: 1.25rem 0.5rem;
    min-height: 140px;
  }
  
  .metric-icon {
    width: 36px;
    height: 36px;
  }
  
  .metric-value {
    font-size: 1.5rem;
  }
  
  .metric-subtitle {
    font-size: 0.625rem;
    max-width: 140px;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  
  .metric-card {
    padding: 1.5rem 1rem;
  }
  
  .metric-subtitle {
    max-width: 100%;
  }
}

/* ============================================
   Accessibility & Motion
   ============================================ */

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hero-box {
    opacity: 1;
    transform: none;
  }
  
  .section-header {
    opacity: 1;
    transform: none;
  }
  
  .metric-card {
    opacity: 1;
    transform: none;
  }
}

/* Focus Visible */
:focus-visible {
  outline: 2px solid var(--color-teal-light);
  outline-offset: 2px;
}

/* Skip Link (for accessibility) */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-teal);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Print Styles */
@media print {
  .background-image,
  .background-overlay {
    display: none;
  }
  
  .page-wrapper {
    background: white;
  }
  
  .sidebar {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
    color: black;
  }
  
  .metric-card {
    border: 1px solid #ccc;
    background: #f5f5f5;
  }
}


#mobile-hero {
  display: none;
}


.mobile-menu-btn {
  display: none;
}


button {
    padding: 15px 35px;
    cursor: pointer;
    background: #23c0ab;
    color: #fff;
    font-weight: bold;
    text-transform: uppercase;
    border: 0px;
}


/* Mobile Navigation */
.nav-mobile {
  background-color: var(--color-navy);
  padding: 1rem var(--container-padding);
  position: relative;
}

.nav-mobile[hidden] {
  display: none;
}

.nav-item-mobile {
  display: block;
  padding: 0.75rem 0;
  color: hsla(0, 0%, 100%, 0.9);
  font-size: 0.9375rem;
  font-weight: 500;
  border-bottom: 1px solid hsla(0, 0%, 100%, 0.1);
  transition: color var(--transition-fast);
}

.nav-item-mobile:last-child {
  border-bottom: none;
}

.nav-item-mobile:hover,
.nav-item-mobile:focus {
  color: var(--color-white);
}


/* Small Mobile */
@media (max-width: 768px) {

.mobile-menu-btn {
    display: block;
    padding: 0.5rem;
    color: var(--color-white);
}


.logo-container {
    padding: 1.5rem 1.5rem 1.5rem;
}

#mobile-hero {
  display: block;
}


#desctop-hero {
  display: none;
}

}


  /* Language selector - desktop visible / mobile hidden, и обратно */
    .lang-selector {
      display: flex;
    }
    .lang-selector-mobile {
      display: none;
    }

    @media (max-width: 768px) {
      .lang-selector {
        display: none;
      }
      .lang-selector-mobile {
        display: flex;
      }
    }