/* ===========================
   Cyclone Chemicals — Main Stylesheet
   Design Language: crisp white, cobalt blue, citrus lime
   Typography: Barlow Semi Condensed (headings), Inter (body)
   =========================== */

/* --- CSS Custom Properties --- */
:root {
  /* Brand colours */
  --color-primary: #1E5FA8;
  --color-primary-dark: #174A85;
  --color-primary-light: #2B7AD4;
  --color-secondary: #8DC63F;
  --color-secondary-dark: #6FA832;

  /* Page surfaces (swap in dark mode) */
  --color-bg: #FAFBFC;
  --color-bg-alt: #E8ECEF;
  --color-surface: #FFFFFF;
  --color-text: #2B2E33;
  --color-text-muted: #5A5E66;
  --color-border: #D1D5DB;

  /* Text-on-brand: stays light in BOTH themes (sits on primary/accent bg) */
  --color-on-brand: #FFFFFF;
  --color-on-brand-muted: #E8ECEF;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Type scale */
  --font-heading: 'Barlow Semi Condensed', sans-serif;
  --font-body: 'Inter', sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.25rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
  --radius: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition: 0.2s ease;
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --color-bg: #1A1D23;
  --color-bg-alt: #23272E;
  --color-surface: #2B2E33;
  --color-text: #E8ECEF;
  --color-text-muted: #9CA3AF;
  --color-border: #3B3F47;
  --color-primary: #4A9AE8;
  --color-primary-dark: #3A82CC;
  --color-primary-light: #6CB3F5;
  --color-secondary: #A3D65F;
  --color-secondary-dark: #8DC63F;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition), color var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

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

a:hover {
  color: var(--color-primary-light);
}

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

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

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

ul, ol { list-style: none; }

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

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

.badge {
  display: inline-block;
  background-color: var(--color-secondary);
  color: var(--color-on-brand);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-brand);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-on-brand);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-brand);
}

.btn-phone {
  background-color: var(--color-secondary);
  color: var(--color-on-brand);
}

.btn-phone:hover {
  background-color: var(--color-secondary-dark);
  color: var(--color-on-brand);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition), border-color var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.header__brand:hover {
  color: var(--color-primary);
}

.header__brand-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-bg-alt);
  color: var(--color-text);
  transition: background-color var(--transition), color var(--transition);
}

.theme-toggle:hover {
  background-color: var(--color-primary);
  color: var(--color-on-brand);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- Hero --- */
.hero {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(30,95,168,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero__text {
  position: relative;
  z-index: 1;
}

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

.hero__title span {
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  z-index: 1;
}

.hero__image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-border) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: center;
  padding: 0;
  border: none;
  overflow: hidden;
}

.hero__image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* --- Stats Row --- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  padding: var(--space-2xl) 0;
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

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

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Product Category Cards --- */
.product-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), border-color var(--transition);
}

.product-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.product-card__image {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-border) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: center;
  padding: 0;
  overflow: hidden;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.product-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.product-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.product-card__items {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.product-card__items li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.product-card__items li:last-child {
  border-bottom: none;
}

.product-card__items li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  flex-shrink: 0;
}

/* --- Section Headers --- */
.section__header {
  margin-bottom: var(--space-2xl);
}

.section__header h2 {
  margin-bottom: var(--space-sm);
}

.section__header p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 640px;
}

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

.section__header--center p {
  margin: 0 auto;
}

/* --- CTA Banner --- */
.cta-banner {
  background-color: var(--color-primary);
  color: var(--color-on-brand);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--color-on-brand);
  margin-bottom: var(--space-sm);
}

.cta-banner p {
  color: var(--color-on-brand-muted);
  font-size: var(--text-lg);
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn-primary {
  background-color: var(--color-on-brand);
  color: var(--color-primary);
}

.cta-banner .btn-primary:hover {
  background-color: var(--color-on-brand-muted);
}

/* --- About page --- */
.about-intro {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-intro__text h2 {
  margin-bottom: var(--space-md);
}

.about-intro__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.about-sidebar {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.about-sidebar__item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.about-sidebar__item:last-child {
  border-bottom: none;
}

.about-sidebar__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.about-sidebar__value {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-primary);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.industry-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: background-color var(--transition), border-color var(--transition);
}

.industry-item__icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.industry-item__icon svg {
  width: 20px;
  height: 20px;
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info__item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  border-radius: var(--radius);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-info__icon svg {
  width: 20px;
  height: 20px;
}

.contact-info__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.contact-info__value {
  font-size: var(--text-base);
  color: var(--color-text);
}

.contact-info__value a {
  color: var(--color-primary);
}

/* Form */
.form {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.form__title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-lg);
}

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

.form__label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), background-color var(--transition), color var(--transition);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,95,168,0.1);
}

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

.form__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* Map */
.map-container {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-top: var(--space-xl);
}

.map-container iframe {
  width: 100%;
  height: 350px;
  border: none;
}

/* --- Footer --- */
.footer {
  background-color: var(--color-primary);
  color: var(--color-on-brand);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer a {
  color: var(--color-on-brand-muted);
  transition: color var(--transition);
}

.footer a:hover {
  color: var(--color-on-brand);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-on-brand);
  margin-bottom: var(--space-md);
}

.footer__desc {
  font-size: var(--text-sm);
  color: var(--color-on-brand-muted);
  max-width: 360px;
  line-height: 1.7;
}

.footer__title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-on-brand);
  margin-bottom: var(--space-md);
}

.footer__links li {
  margin-bottom: var(--space-sm);
}

.footer__links a {
  font-size: var(--text-sm);
}

.footer__contact-item {
  font-size: var(--text-sm);
  color: var(--color-on-brand-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: var(--space-lg);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-on-brand-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-2xl); }

  .hero__content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero__visual {
    order: -1;
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  h1 { font-size: var(--text-3xl); }

  .container {
    padding: 0 var(--space-md);
  }

  .nav-toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-xl);
    gap: var(--space-xl);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .header__nav.is-open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: var(--space-md);
  }

  .nav__link {
    font-size: var(--text-lg);
    padding: var(--space-sm) 0;
    width: 100%;
    display: block;
  }

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

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .hero__actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  h1 { font-size: var(--text-2xl); }
  .btn { width: 100%; justify-content: center; }
}