/* ============================================
   Everwin Rubber - Static Website
   Design System & Stylesheet
   ============================================ */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700&family=Montserrat:wght@400;500;600;700&display=swap');

/* ============================================
   ROOT & VARIABLES
   ============================================ */

:root {
  /* Colour Palette */
  --color-primary: #2D2420;
  --color-accent: #D4A574;
  --color-light: #F0EBE3;
  --color-dark: #1A1512;
  --color-text: #2D2420;
  --color-text-light: #5C4B42;
  --color-border: #E5DDD0;

  /* Typography */
  --font-serif: 'Cinzel', serif;
  --font-sans: 'Montserrat', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Transitions */
  --transition: all 0.3s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  color: var(--color-primary);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
}

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

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

a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

blockquote {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-style: italic;
  line-height: 1.4;
  color: var(--color-primary);
  margin: var(--spacing-xl) 0;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

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

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-light);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
}

.navbar-brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link:focus::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.hamburger span {
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--color-light);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    font-size: 0.9rem;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(45, 36, 32, 0.7), rgba(45, 36, 32, 0.5)),
              url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><defs><pattern id="plantation" patternUnits="userSpaceOnUse" width="200" height="200"><path d="M100,50 Q80,70 70,100 Q60,130 100,160 Q140,130 130,100 Q120,70 100,50" fill="%238B7355" opacity="0.3"/><path d="M100,40 L100,180" stroke="%238B7355" stroke-width="1" opacity="0.2"/></pattern></defs><rect width="1200" height="800" fill="%23F0EBE3"/><rect width="1200" height="800" fill="url(%23plantation)"/></svg>');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  color: var(--color-light);
  text-align: center;
  padding: var(--spacing-xl);
}

.hero-content {
  max-width: 900px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  color: var(--color-light);
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--color-light);
  font-style: italic;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
}

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

/* ============================================
   STATS BAR
   ============================================ */

.stats-bar {
  background-color: var(--color-primary);
  color: var(--color-light);
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  text-align: center;
}

.stat {
  padding: var(--spacing-md);
}

.stat p {
  color: var(--color-light);
  font-size: 0.95rem;
  line-height: 1.5;
}

.stat strong {
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================
   PROBLEM STATEMENT & QUOTES
   ============================================ */

.problem-statement,
.bridge-quote {
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.problem-statement blockquote,
.bridge-quote blockquote {
  max-width: 800px;
  margin: 0 auto;
}

/* ============================================
   RISKS SECTION
   ============================================ */

.risks {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background-color: var(--color-light);
}

.risks h2 {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.risks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.risk-card {
  padding: var(--spacing-lg);
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: var(--transition);
}

.risk-card:hover {
  box-shadow: 0 8px 24px rgba(45, 36, 32, 0.1);
  transform: translateY(-4px);
}

.risk-card h3 {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.risk-number {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: -4px;
}

.risk-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ============================================
   FEATURE SECTIONS
   ============================================ */

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

.feature-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.feature-section.feature-right .feature-content {
  direction: rtl;
}

.feature-section.feature-right .feature-text {
  direction: ltr;
}

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

.feature-text h2 {
  margin-bottom: var(--spacing-md);
}

.feature-subheading {
  color: var(--color-accent);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-lg) !important;
  font-family: var(--font-sans);
  font-weight: 600;
}

.feature-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.feature-illustration svg {
  width: 100%;
  max-width: 280px;
  height: auto;
}

.link-accent {
  color: var(--color-accent);
  font-weight: 600;
}

@media (max-width: 768px) {
  .feature-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .feature-section.feature-right .feature-content {
    direction: ltr;
  }

  .feature-illustration {
    min-height: 200px;
    order: -1;
  }
}

/* ============================================
   FOUNDERS STORY
   ============================================ */

.founders-story {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: linear-gradient(180deg, var(--color-light) 0%, rgba(212, 165, 116, 0.05) 100%);
  text-align: center;
}

.founders-story blockquote {
  margin-bottom: var(--spacing-2xl);
}

.founders-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.founders-illustration {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.founders-illustration svg {
  width: 100%;
  max-width: 220px;
  height: auto;
}

.founders-text {
  text-align: left;
}

.founders-text h2 {
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

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

@media (max-width: 768px) {
  .founders-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .founders-text h2,
  .founders-text {
    text-align: center;
  }
}

/* ============================================
   RUBBER GRADES SECTION
   ============================================ */

.rubber-grades {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background-color: var(--color-dark);
  color: var(--color-light);
}

.rubber-grades h2 {
  color: var(--color-light);
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-intro {
  text-align: center;
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: var(--spacing-2xl);
}

.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  margin-bottom: var(--spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  padding: var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-light);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
}

.accordion-header:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.accordion-header.active {
  background-color: var(--color-accent);
  color: var(--color-dark);
}

.product-name {
  font-family: var(--font-serif);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.accordion-icon {
  font-size: 1.5rem;
  transition: var(--transition);
}

.accordion-header.active .accordion-icon {
  transform: rotate(45deg);
}

.accordion-panel {
  display: none;
  padding: var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.accordion-panel.active {
  display: block;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--color-light);
}

.spec-table tbody tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-table td {
  padding: var(--spacing-md);
  font-size: 0.95rem;
}

.spec-table td:first-child {
  width: 40%;
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
  padding: var(--spacing-2xl) var(--spacing-lg);
  background-color: var(--color-dark);
  color: var(--color-light);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  width: 400px;
  height: 400px;
  opacity: 0.08;
  font-family: var(--font-serif);
  font-size: 10rem;
  font-weight: 700;
  pointer-events: none;
}

.contact-wrapper {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.contact-logo {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
}

.contact h2 {
  color: var(--color-light);
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.contact > p {
  text-align: center;
  color: var(--color-light);
  margin-bottom: var(--spacing-xl);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: var(--spacing-md);
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  background-color: transparent;
  color: var(--color-light);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(212, 165, 116, 0.2);
}

.contact-form select {
  cursor: pointer;
}

.contact-form select option {
  background-color: var(--color-dark);
  color: var(--color-light);
}

.btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: var(--transition);
}

.btn-submit {
  background-color: var(--color-accent);
  color: var(--color-dark);
}

.btn-submit:hover {
  background-color: #E5B89A;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(212, 165, 116, 0.3);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  padding: var(--spacing-lg);
  background-color: var(--color-primary);
  color: var(--color-light);
  text-align: center;
  font-size: 0.85rem;
  border-top: 1px solid var(--color-accent);
}

/* ============================================
   ACCESSIBILITY & UTILITIES
   ============================================ */

.quote {
  position: relative;
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: center;
}

.quote::before,
.quote::after {
  content: '"';
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.3;
  position: absolute;
}

.quote::before {
  top: -10px;
  left: 0;
}

.quote::after {
  bottom: -30px;
  right: 0;
}

/* Scroll reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

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

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip to main link (accessibility) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background-color: var(--color-accent);
  color: var(--color-dark);
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 4px 0;
}

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

/* Print styles */
@media print {
  nav,
  .hamburger {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

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

  .contact-form {
    gap: var(--spacing-sm);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}