/* ==========================================================================
   ENACo Ltd. - Base Styles & Design Tokens
   ========================================================================== */

:root {
  /* Brand colours */
  --enaco-blue: #003E6B;
  --enaco-blue-dark: #002847;
  --enaco-blue-light: #0A5490;
  --enaco-green: #5FAE3E;
  --enaco-green-dark: #4A8A30;
  --enaco-green-light: #7BC458;
  --enaco-charcoal: #2B2B2B;
  --enaco-charcoal-light: #4A4A4A;
  --enaco-grey-50: #F7F8FA;
  --enaco-grey-100: #EEF0F3;
  --enaco-grey-200: #DDE1E6;
  --enaco-white: #FFFFFF;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing & layout */
  --enaco-section-py: clamp(4rem, 8vw, 7rem);
  --enaco-section-py-sm: clamp(2.5rem, 5vw, 4rem);
  --enaco-container-max: 1140px;

  /* Radius */
  --enaco-radius-sm: 8px;
  --enaco-radius: 12px;
  --enaco-radius-lg: 16px;
  --enaco-radius-xl: 24px;

  /* Shadows */
  --enaco-shadow-sm: 0 2px 8px rgba(0, 62, 107, 0.06);
  --enaco-shadow: 0 4px 24px rgba(0, 62, 107, 0.08);
  --enaco-shadow-lg: 0 8px 40px rgba(0, 62, 107, 0.12);
  --enaco-shadow-hover: 0 12px 48px rgba(0, 62, 107, 0.16);

  /* Transitions */
  --enaco-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --enaco-transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Bootstrap overrides */
  --bs-primary: #003E6B;
  --bs-primary-rgb: 0, 62, 107;
  --bs-body-font-family: 'Inter', sans-serif;
  --bs-body-color: #2B2B2B;
  --bs-border-radius: 12px;
  --bs-link-color: #003E6B;
  --bs-link-hover-color: #0A5490;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--enaco-charcoal);
  background-color: var(--enaco-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--enaco-blue);
}

h1, .h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2, .h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3, .h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  margin-bottom: 1rem;
}

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

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

::selection {
  background-color: rgba(0, 62, 107, 0.15);
  color: var(--enaco-blue);
}

/* --------------------------------------------------------------------------
   Typography utilities
   -------------------------------------------------------------------------- */

.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--enaco-green);
  margin-bottom: 1rem;
}

.eyebrow-blue {
  color: var(--enaco-blue-light);
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background-color: var(--enaco-green);
  margin-right: 0.75rem;
  vertical-align: middle;
}

.eyebrow-blue::before {
  background-color: var(--enaco-blue);
}

.lead-text {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--enaco-charcoal-light);
}

.section-heading {
  margin-bottom: 1rem;
}

.section-subheading {
  max-width: 640px;
  margin-bottom: 3rem;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */

.section {
  padding-top: var(--enaco-section-py);
  padding-bottom: var(--enaco-section-py);
}

.section-sm {
  padding-top: var(--enaco-section-py-sm);
  padding-bottom: var(--enaco-section-py-sm);
}

.section-grey {
  background-color: var(--enaco-grey-50);
}

.section-dark {
  background-color: var(--enaco-blue);
  color: var(--enaco-white);
}

.section-dark h2,
.section-dark h3 {
  color: var(--enaco-white);
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--enaco-transition-slow), transform var(--enaco-transition-slow);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }

/* --------------------------------------------------------------------------
   Page hero (inner pages)
   -------------------------------------------------------------------------- */

.page-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  background-size: cover;
  background-position: center;
  color: var(--enaco-white);
}

@media (min-width: 1400px) {
  .page-hero {
    padding-top: 11rem;
  }
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 40, 71, 0.92) 0%, rgba(0, 62, 107, 0.78) 100%);
}

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

.page-hero h1 {
  color: var(--enaco-white);
  margin-bottom: 1.25rem;
}

.page-hero .lead-text {
  color: rgba(255, 255, 255, 0.88);
  max-width: 640px;
  margin-bottom: 2rem;
}

.page-hero-industrial {
  background-image: url('../assets/images/hero-wellhead.jpg');
}

.page-hero-aquatic {
  background-image: url('../assets/images/hero-pond.jpg');
}

.page-hero-cases {
  background-image: url('../assets/images/hero-cases.jpg');
}

.page-hero-contact {
  background-image: url('../assets/images/hero-about.jpg');
}

/* --------------------------------------------------------------------------
   Secondary nav (division pages)
   -------------------------------------------------------------------------- */

.sub-nav {
  background-color: var(--enaco-white);
  border-bottom: 1px solid var(--enaco-grey-100);
  position: sticky;
  top: 72px;
  z-index: 1020;
}

.sub-nav .nav-link {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--enaco-charcoal-light);
  padding: 1rem 1.25rem;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--enaco-transition), border-color var(--enaco-transition);
}

.sub-nav .nav-link:hover,
.sub-nav .nav-link:focus {
  color: var(--enaco-blue);
}

.sub-nav .nav-link.active {
  color: var(--enaco-blue);
  border-bottom-color: var(--enaco-green);
}

@media (max-width: 991.98px) {
  .sub-nav {
    top: 64px;
    overflow-x: auto;
  }
}

/* --------------------------------------------------------------------------
   Split content sections
   -------------------------------------------------------------------------- */

.split-section {
  align-items: center;
}

.split-section-image {
  border-radius: var(--enaco-radius-lg);
  overflow: hidden;
  box-shadow: var(--enaco-shadow);
}

.split-section-image img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.page-surfactants .split-section-image {
  width: 65%;
  margin-left: auto;
  margin-right: auto;
}

.page-surfactants .split-section-image img {
  min-height: 208px;
}

.enaco-img-zoom:hover img {
  transform: scale(1.05);
}

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

.benefit-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
  font-size: 1rem;
}

.benefit-list li i {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(95, 174, 62, 0.12);
  color: var(--enaco-green);
  border-radius: 50%;
  font-size: 0.875rem;
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   Form styles
   -------------------------------------------------------------------------- */

.form-control,
.form-select {
  border: 1px solid var(--enaco-grey-200);
  border-radius: var(--enaco-radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  transition: border-color var(--enaco-transition), box-shadow var(--enaco-transition);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--enaco-blue);
  box-shadow: 0 0 0 3px rgba(0, 62, 107, 0.1);
}

.form-label {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--enaco-charcoal);
  margin-bottom: 0.5rem;
}

.form-success-message {
  display: none;
  padding: 1.25rem;
  background-color: rgba(95, 174, 62, 0.1);
  border: 1px solid rgba(95, 174, 62, 0.3);
  border-radius: var(--enaco-radius);
  color: var(--enaco-green-dark);
  margin-top: 1.5rem;
}

.form-success-message.show {
  display: block;
}

.form-error-message {
  display: none;
  padding: 1.25rem;
  background-color: rgba(220, 53, 69, 0.08);
  border: 1px solid rgba(220, 53, 69, 0.25);
  border-radius: var(--enaco-radius);
  color: #b02a37;
  margin-top: 1.5rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.9rem;
  line-height: 1.5;
}

.form-error-message.show {
  display: block;
}