/* CSS Variables */
:root {
  --color-primary: #2c6e49;
  --color-secondary: #f4f1de;
  --color-herbal-green: #DDE8DF;
  --color-cotton-white: #FAFAF7;
  --color-sand-beige: #E4D9C7;
  --color-charcoal: #4F514F;
  --color-lavender-mist: #D8D1EA;
  --color-honey-gold: #F3E4B5;
  
  --font-primary: 'Karla', sans-serif;
  --font-body: 'Nunito', sans-serif;
  --font-label: 'Quicksand', sans-serif;
  
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  --shadow-sm: 0 2px 4px rgba(79, 81, 79, 0.1);
  --shadow-md: 0 4px 8px rgba(79, 81, 79, 0.15);
  --shadow-lg: 0 8px 16px rgba(79, 81, 79, 0.2);
  
  --transition-fast: 0.3s ease;
  --transition-slow: 0.6s ease;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-charcoal);
  background-color: var(--color-cotton-white);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-charcoal);
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.25rem); }

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

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

a:hover {
  color: var(--color-charcoal);
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--color-herbal-green) 0%, var(--color-cotton-white) 100%);
  padding: var(--space-md) var(--space-lg);
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.site-header.hidden {
  transform: translateY(-100%);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.brand-name {
  font-family: var(--font-primary);
  font-size: clamp(1rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  flex: 1;
  min-width: 200px;
}

.nav-menu {
  display: none;
}

.nav-menu ul {
  list-style: none;
  display: flex;
  gap: var(--space-md);
}

.nav-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  color: var(--color-charcoal);
}

.nav-menu a:hover {
  background-color: var(--color-herbal-green);
  color: var(--color-primary);
}

.menu-close {
  display: none;
}

.burger-btn {
  display: none;
  background: none;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  transition: background-color var(--transition-fast);
}

.burger-btn:hover {
  background-color: var(--color-herbal-green);
}

.burger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast);
}

.burger-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.burger-btn.active span:nth-child(2) {
  opacity: 0;
}

.burger-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Main Content */
main {
  flex: 1;
  width: 100%;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.section {
  padding: var(--space-xl) var(--space-lg);
  margin-bottom: var(--space-xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
}

/* Banner */
.banner {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .banner {
    height: 250px;
  }
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.card {
  background: var(--color-cotton-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 1px solid var(--color-herbal-green);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.card-title {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.card-text {
  font-size: 0.95rem;
  color: var(--color-charcoal);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-primary);
  color: var(--color-cotton-white);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-label);
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  text-align: center;
}

.btn:hover {
    color: white;
  background-color: var(--color-charcoal);
  transform: scale(1.05);
}

.btn-secondary {
  background-color: var(--color-sand-beige);
  color: var(--color-charcoal);
}

.btn-secondary:hover {
    color: black;
  background-color: var(--color-lavender-mist);
}

/* Forms */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-cotton-white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-label);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-charcoal);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-herbal-green);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.checkbox-group input[type="checkbox"] {
  margin-top: 4px;
  flex-shrink: 0;
}

.checkbox-group label {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Google Maps */
.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin: var(--space-xl) 0;
}

.map-container iframe,
iframe.no-border {
  width: 100%;
  height: 100%;
  border: none;
}

/* Privacy Popup */
.privacy-popup {
  display: none;
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  max-width: 400px;
  background: var(--color-cotton-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  border: 2px solid var(--color-herbal-green);
}

.privacy-popup.active {
  display: block;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.popup-close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-charcoal);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.popup-content h3 {
  margin-bottom: var(--space-sm);
  font-size: 1.1rem;
}

.popup-content p {
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
}

/* Footer */
.site-footer {
  background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-primary) 100%);
  color: var(--color-cotton-white);
  padding: var(--space-xl) var(--space-lg);
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  list-style: none;
}

.footer-menu a {
  color: var(--color-cotton-white);
  padding: var(--space-sm) var(--space-md);
  transition: opacity var(--transition-fast);
}

.footer-menu a:hover {
  opacity: 0.8;
}

.footer-text {
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.9;
}

.date {
  font-weight: 600;
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.product-card {
  background: var(--color-cotton-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.product-info {
  padding: var(--space-lg);
}

.product-title {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.product-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin: var(--space-md) 0;
}

/* Oil Safety Scale */
.safety-scale {
  display: flex;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  flex-wrap: wrap;
}

.safety-item {
  flex: 1;
  min-width: 120px;
  background: var(--color-herbal-green);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
}

.safety-level {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

/* Routine Timer */
.routine-timer {
  background: linear-gradient(135deg, var(--color-lavender-mist) 0%, var(--color-herbal-green) 100%);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
}

.timer-display {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-primary);
  margin: var(--space-md) 0;
}

/* Step List */
.step-list {
  list-style: none;
  counter-reset: step-counter;
}

.step-list li {
  counter-increment: step-counter;
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
  position: relative;
}

.step-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  background: var(--color-primary);
  color: var(--color-cotton-white);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* Icon Display */
.icon-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-cotton-white);
  border-radius: var(--radius-md);
  min-width: 100px;
}

.icon-item i {
  font-size: 2rem;
  color: var(--color-primary);
}

/* Calculator */
.calculator-box {
  background: var(--color-sand-beige);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
}

.calculator-result {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-md);
  text-align: center;
}

/* 404 Page */
.error-container {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.error-code {
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.error-message {
  font-size: 1.5rem;
  margin-bottom: var(--space-xl);
}

/* Thank You Page */
.thank-you-container {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.thank-you-icon {
  font-size: 4rem;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

/* Responsive Design */
@media (min-width: 769px) {
  .nav-menu {
    display: block;
  }

  .nav-menu ul {
    flex-direction: row;
  }

  .burger-btn {
    display: none;
  }

  .brand-name {
    flex: 0 1 auto;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: row;
    justify-content: space-between;
  }

  .brand-name {
    text-align: left;
    flex: 0 1 auto;
  }

  .burger-btn {
    display: flex;
    order: 2;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--color-cotton-white);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    padding: var(--space-xl) var(--space-lg);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-fast);
  }

  .nav-menu.active {
    display: block;
    transform: translateX(0);
  }

  .nav-menu ul {
    flex-direction: column;
  }

  .menu-close {
    display: block;
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-charcoal);
    width: 32px;
    height: 32px;
  }

  .card-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .form-container {
    padding: var(--space-md);
  }

  .privacy-popup {
    right: var(--space-md);
    left: var(--space-md);
    max-width: none;
  }

  .footer-menu {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .section {
    padding: var(--space-lg) var(--space-md);
  }

  .container {
    padding: var(--space-md);
  }

  .error-code {
    font-size: 4rem;
  }
}

@media (max-width: 320px) {
  html {
    font-size: 12px;
  }

  .banner {
    height: 200px;
  }

  .card-grid,
  .product-grid {
    gap: var(--space-md);
  }
}

.card-highlight {
  margin-top: var(--space-xl);
  background: var(--color-lavender-mist);
}

.card-important {
  margin-top: var(--space-lg);
  background: var(--color-herbal-green);
}

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

.text-large {
  font-size: 1.2rem;
}

.text-medium {
  font-size: 1.1rem;
}

.text-small {
  font-size: 0.9rem;
}

.max-width-600 {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.flex-center {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

.list-inside {
  list-style-position: inside;
  margin: var(--space-md) 0;
}

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

.btn-margin-right {
  margin-right: 10px;
}

.card-text-small {
  font-size: 0.9rem;
  margin-top: var(--space-md);
}

.margin-bottom-lg {
  margin-bottom: var(--space-lg);
}

.margin-bottom-xl {
  margin-bottom: var(--space-xl);
}

.margin-top-md {
  margin-top: var(--space-md);
}

.margin-top-lg {
  margin-top: var(--space-lg);
}

.margin-top-xl {
  margin-top: var(--space-xl);
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .privacy-popup,
  .burger-btn {
    display: none;
  }

  body {
    background: white;
  }
}