/* 
 * loan.in.ua - Main Stylesheet
 * Implements green/white color palette with Liquid Glass design aesthetic
 */

/* ===== CSS Variables ===== */
:root {
  /* Primary Colors */
  --white: #FFFFFF;
  --sage-green: #8FBC8F;
  --forest-green: #228B22;
  
  /* Accent Colors */
  --mint-green: #98FB98;
  --pale-green: #E0F2E0;
  --dark-green: #006400;
  
  /* Glass Effect Variables */
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-blur: 10px;
  
  /* Typography */
  --font-primary: 'Roboto', sans-serif;
  --font-secondary: 'Open Sans', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: #333;
  background-color: var(--white);
  background-image: 
    linear-gradient(120deg, rgba(143, 188, 143, 0.1) 0%, rgba(224, 242, 224, 0.1) 100%);
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  color: var(--forest-green);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

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

a {
  color: var(--forest-green);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--dark-green);
}

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

/* ===== Container & Layout ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -15px;
}

.col {
  flex: 1;
  padding: 0 15px;
}

/* ===== Glass Morphism Components ===== */
.glass-card {
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--glass-shadow);
  padding: var(--spacing-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px 0 rgba(31, 38, 135, 0.5);
}

.glass-nav {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* ===== Header & Navigation ===== */
.site-header {
  padding: var(--spacing-md) 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--forest-green);
}

.main-nav ul {
  display: flex;
  list-style: none;
}

.main-nav li {
  margin-left: var(--spacing-lg);
}

.main-nav a {
  font-weight: 500;
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--forest-green);
  transition: width 0.3s ease;
}

.main-nav a:hover::after {
  width: 100%;
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--spacing-xl) 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(143, 188, 143, 0.2) 0%, rgba(224, 242, 224, 0.2) 100%);
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--dark-green);
  color: white;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--forest-green);
  color: var(--forest-green);
}

.btn-outline:hover {
  background-color: var(--forest-green);
  color: white;
}

.btn-glass {
  background: rgba(143, 188, 143, 0.3);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--dark-green);
}

.btn-glass:hover {
  background: rgba(143, 188, 143, 0.5);
  color: var(--dark-green);
}

/* ===== Loan Offers ===== */
.offers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.offer-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.offer-card__header {
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(143, 188, 143, 0.3);
  margin-bottom: var(--spacing-sm);
}

.offer-card__title {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-xs);
}

.offer-card__body {
  flex-grow: 1;
}

.offer-card__footer {
  margin-top: auto;
  padding-top: var(--spacing-md);
}

.offer-detail {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.offer-detail__label {
  color: #666;
}

.offer-detail__value {
  font-weight: 500;
}

/* ===== Loan Calculator ===== */
.calculator {
  background: var(--pale-green);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.calculator-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid rgba(143, 188, 143, 0.3);
  border-radius: var(--radius-sm);
  background-color: white;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--sage-green);
  box-shadow: 0 0 0 3px rgba(143, 188, 143, 0.2);
}

.calculator-result {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.result-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid rgba(143, 188, 143, 0.2);
}

.result-row:last-child {
  border-bottom: none;
}

.result-label {
  font-weight: 500;
}

.result-value {
  font-weight: 700;
}

/* ===== Footer ===== */
.site-footer {
  background-color: var(--forest-green);
  color: white;
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.footer-column h3 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
  html {
    font-size: 15px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .row {
    flex-direction: column;
  }
  
  .col {
    margin-bottom: var(--spacing-md);
  }
  
  .main-nav ul {
    flex-direction: column;
  }
  
  .main-nav li {
    margin: var(--spacing-xs) 0;
    margin-left: 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .offers-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Accessibility ===== */
:focus {
  outline: 3px solid rgba(143, 188, 143, 0.5);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

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

.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); }
.mt-5 { margin-top: var(--spacing-xl); }

.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); }
.mb-5 { margin-bottom: var(--spacing-xl); }