/* Crystal Super Vills — brand palette from corporate identity */
:root {
  --navy: #1a3668;
  --navy-dark: #0f2347;
  --green: #4b8b2b;
  --green-light: #5da338;
  --sky: #4a90e2;
  --white: #ffffff;
  --off-white: #f7f9fc;
  --gray-100: #eef2f7;
  --gray-500: #6b7a90;
  --gray-900: #121212;
  --shadow: 0 4px 24px rgba(26, 54, 104, 0.08);
  --shadow-lg: 0 12px 48px rgba(26, 54, 104, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --header-h: 80px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--gray-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

.container {
  width: 100%;
  max-width: 100%;
  margin-inline: auto;
  padding-inline: clamp(1rem, 2.5vw, 2rem);
}

/* Screen-reader only */
.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;
}

/* ── Header ── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(26, 54, 104, 0.06);
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand img {
  height: 52px;
  width: auto;
  background: transparent;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text .name-crystal {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.02em;
}

.brand-text .name-vills {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-desktop {
  display: none;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-desktop a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--navy);
  position: relative;
}

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

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

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile {
  position: fixed;
  inset: var(--header-h) 0 0;
  background: var(--white);
  padding: 2rem;
  transform: translateX(100%);
  transition: transform var(--transition);
  z-index: 999;
}

.nav-mobile.open {
  transform: translateX(0);
}

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.nav-mobile a {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
}

/* ── Hero ── */
.hero {
  position: relative;
  min-height: clamp(300px, 38vw, 460px);
  display: flex;
  align-items: flex-end;
  padding-top: var(--header-h);
  overflow: hidden;
  background: var(--off-white);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.15) 55%, rgba(247, 249, 252, 0.85) 100%),
    url('../assets/images/hero-banner.png?v=1') center top / cover no-repeat;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 0 0 2rem;
  text-align: center;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.hero .btn {
  padding: 0.65rem 1.35rem;
  font-size: 0.875rem;
  box-shadow: 0 4px 16px rgba(26, 54, 104, 0.15);
}

.hero .btn-outline {
  color: var(--navy);
  border-color: var(--navy);
  background: rgba(255, 255, 255, 0.9);
}

.hero .btn-outline:hover {
  background: var(--navy);
  color: var(--white);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--green);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(75, 139, 43, 0.4);
}

.btn-primary:hover {
  background: var(--green-light);
  color: var(--white);
  box-shadow: 0 8px 24px rgba(75, 139, 43, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
}

/* ── Sections shared ── */
section {
  width: 100%;
  padding: 5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--navy);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section-intro {
  max-width: none;
  color: var(--gray-500);
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  margin-bottom: 3rem;
}

/* ── About ── */
.about {
  background: var(--off-white);
}

.about-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about-image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  object-fit: cover;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  padding: 1.25rem 0.75rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  color: var(--navy);
}

.stat span {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* ── Sectors ── */
.sectors {
  background: var(--white);
}

.sector-cards {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  width: 100%;
}

.sector-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  min-height: 100%;
}

.sector-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.sector-card-header {
  padding: 2rem 2rem 1.5rem;
  color: var(--white);
}

.sector-card.dairy .sector-card-header {
  background: linear-gradient(135deg, var(--green) 0%, #3d7324 100%);
}

.sector-card.agri .sector-card-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
}

.sector-card.water .sector-card-header {
  background: linear-gradient(135deg, var(--sky) 0%, #2d6cb5 100%);
}

.sector-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  opacity: 0.9;
}

.sector-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.sector-card .subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  font-weight: 500;
}

.sector-card-body {
  padding: 1.5rem 2rem 2rem;
}

.sector-card-body p {
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.sector-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sector-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--gray-900);
}

.sector-features li::before {
  content: '✓';
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
}

.sector-card.water .sector-features li::before {
  color: var(--sky);
}

/* ── Values ── */
.values {
  background: linear-gradient(180deg, var(--off-white) 0%, var(--white) 100%);
}

.values-grid {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
  width: 100%;
}

.value-item {
  padding: 2rem;
  background: var(--white);
  border-radius: var(--radius);
  border-left: 4px solid var(--green);
  box-shadow: var(--shadow);
}

.value-item:nth-child(2) {
  border-left-color: var(--navy);
}

.value-item:nth-child(3) {
  border-left-color: var(--sky);
}

.value-item h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.value-item p {
  font-size: 0.95rem;
  color: var(--gray-500);
}

/* ── Contact ── */
.contact {
  background: var(--navy-dark);
  color: var(--white);
}

.contact .section-title {
  color: var(--white);
}

.contact .section-intro {
  color: rgba(255, 255, 255, 0.75);
}

.contact-grid {
  display: grid;
  gap: 2.5rem;
  width: 100%;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-item .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: #8fd45a;
}

.contact-item a {
  color: var(--white);
}

.contact-item a:hover {
  color: #8fd45a;
}

.contact-item strong {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
  margin-bottom: 0.15rem;
}

.contact-form-wrap {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  opacity: 0.9;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  transition: border-color var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

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

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

.form-group select option {
  color: var(--gray-900);
  background: var(--white);
}

.alert {
  padding: 1rem 1.25rem;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.alert-success {
  background: rgba(75, 139, 43, 0.25);
  border: 1px solid rgba(143, 212, 90, 0.4);
  color: #b8e89a;
}

.alert-error {
  background: rgba(220, 53, 69, 0.2);
  border: 1px solid rgba(220, 53, 69, 0.4);
  color: #ffb3ba;
}

/* ── Footer ── */
.site-footer {
  background: var(--gray-900);
  color: rgba(255, 255, 255, 0.7);
  padding: 2.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

.footer-swoosh {
  height: 4px;
  background: linear-gradient(90deg, var(--navy) 0%, var(--green) 100%);
  margin-bottom: 1.5rem;
}

.site-footer .brand-line {
  font-family: var(--font-serif);
  color: var(--white);
  margin-bottom: 0.5rem;
}

.site-footer .sectors-line {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  opacity: 0.6;
}

/* ── Responsive ── */
@media (min-width: 640px) {
  .sector-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .sector-card.water {
    grid-column: 1 / -1;
  }

  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }

  .nav-toggle,
  .nav-mobile {
    display: none;
  }

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

  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
  }

  .sector-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .sector-card.water {
    grid-column: auto;
  }
}

@media (min-width: 1024px) {
  :root {
    --header-h: 88px;
  }

  .brand img {
    height: 60px;
  }

  .hero {
    min-height: clamp(340px, 36vw, 500px);
  }

  .hero-content {
    padding-bottom: 2.5rem;
  }

  .section-title {
    font-size: clamp(2rem, 3vw, 3rem);
  }

  .sector-card-header {
    padding: 2.5rem 2.5rem 2rem;
  }

  .sector-card-body {
    padding: 2rem 2.5rem 2.5rem;
  }
}

@media (min-width: 1400px) {
  .container {
    padding-inline: clamp(1.5rem, 3vw, 3rem);
  }
}