/* ========================================
   WateRealms - Global Styles
   ======================================== */

:root {
  /* Colors */
  --color-primary: #0a6e8a;
  --color-primary-light: #0d8db0;
  --color-primary-dark: #074f63;
  --color-accent: #00d4aa;
  --color-accent-light: #33e0be;
  --color-surface: #f8fbfc;
  --color-surface-alt: #eef5f7;
  --color-dark: #0c1b21;
  --color-dark-soft: #1a2f38;
  --color-text: #2c3e44;
  --color-text-light: #6b8590;
  --color-text-inverse: #f0f7fa;
  --color-white: #ffffff;
  --color-border: #d4e4ea;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0a6e8a 0%, #00d4aa 100%);
  --gradient-hero: linear-gradient(180deg, #0c1b21 0%, #0a3d4f 50%, #0a6e8a 100%);
  --gradient-dark: linear-gradient(135deg, #0c1b21 0%, #1a2f38 100%);
  --gradient-card: linear-gradient(180deg, rgba(10,110,138,0.03) 0%, rgba(0,212,170,0.03) 100%);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --section-padding: 6rem 0;
  --container-width: 1200px;
  --container-padding: 0 1.5rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

/* ========================================
   Typography
   ======================================== */

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

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

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: 0 4px 20px rgba(10, 110, 138, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(10, 110, 138, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.btn-small {
  padding: 0.6rem 1.5rem;
  font-size: 0.85rem;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
}

.btn-small:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background: rgba(12, 27, 33, 0.95);
  backdrop-filter: blur(12px);
  padding: 0.6rem 0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  gap: 0;
}

.logo-water {
  color: var(--color-white);
}

.logo-realms {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

.nav-link svg {
  transition: transform var(--transition-fast);
}

.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown:hover .nav-link svg {
  transform: rotate(180deg);
}

.dropdown-menu a {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.88rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background: var(--color-surface);
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ========================================
   Hero
   ======================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.water-ripple {
  position: absolute;
  bottom: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 150vw;
  height: 150vw;
  border-radius: 43%;
  background: rgba(0, 212, 170, 0.04);
  animation: ripple 12s ease-in-out infinite;
}

.ripple-2 {
  animation-delay: -4s;
  background: rgba(10, 110, 138, 0.05);
  width: 140vw;
  height: 140vw;
}

.ripple-3 {
  animation-delay: -8s;
  background: rgba(0, 212, 170, 0.03);
  width: 130vw;
  height: 130vw;
}

@keyframes ripple {
  0%, 100% { transform: translateX(-50%) rotate(0deg); }
  50% { transform: translateX(-50%) rotate(180deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 1.5rem;
}

.hero-tagline {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.hero-title {
  color: var(--color-white);
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #00d4aa 0%, #33e0be 50%, #80f0dd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.15rem;
  color: rgba(240, 247, 250, 0.75);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ========================================
   Features
   ======================================== */

.features {
  padding: var(--section-padding);
  background: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.feature-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(10, 110, 138, 0.1);
  border-color: rgba(10, 110, 138, 0.2);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
  color: var(--color-primary);
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.65;
}

/* ========================================
   Showcase
   ======================================== */

.showcase {
  padding: var(--section-padding);
  background: var(--color-surface);
}

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

.showcase-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.showcase-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(10, 110, 138, 0.12);
}

.showcase-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, #e8f4f8 0%, #d0ebf1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.showcase-placeholder {
  width: 120px;
  height: 120px;
  color: var(--color-primary);
  opacity: 0.5;
}

.showcase-content {
  padding: 1.75rem;
}

.showcase-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(10, 110, 138, 0.08);
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.showcase-content h3 {
  margin-bottom: 0.75rem;
}

.showcase-content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

/* ========================================
   Science Banner
   ======================================== */

.science-banner {
  position: relative;
  padding: 6rem 0;
  background: var(--gradient-dark);
  overflow: hidden;
}

.science-bg {
  position: absolute;
  inset: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
  opacity: 0;
  animation: float-particle 8s ease-in-out infinite;
}

.particle:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.particle:nth-child(2) { left: 30%; top: 60%; animation-delay: 1.5s; }
.particle:nth-child(3) { left: 50%; top: 30%; animation-delay: 3s; }
.particle:nth-child(4) { left: 70%; top: 70%; animation-delay: 4.5s; }
.particle:nth-child(5) { left: 90%; top: 40%; animation-delay: 6s; }

@keyframes float-particle {
  0%, 100% { opacity: 0; transform: translateY(20px) scale(0); }
  20% { opacity: 0.6; transform: translateY(0) scale(1); }
  80% { opacity: 0.6; transform: translateY(-30px) scale(1); }
  100% { opacity: 0; transform: translateY(-50px) scale(0); }
}

.science-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.science-content h2 {
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.science-content p {
  color: rgba(240, 247, 250, 0.7);
  font-size: 1.1rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

/* ========================================
   Categories
   ======================================== */

.categories {
  padding: var(--section-padding);
  background: var(--color-white);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2.5rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: all var(--transition-base);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(10, 110, 138, 0.1);
  border-color: var(--color-primary);
}

.category-card:hover .category-icon {
  color: var(--color-accent);
  transform: scale(1.05);
}

.category-icon {
  width: 56px;
  height: 56px;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  transition: all var(--transition-base);
}

.category-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.category-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--color-dark);
  padding: 4rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links h4 {
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  padding: 1.5rem 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.3);
}

/* ========================================
   Page Styles (for inner pages)
   ======================================== */

.page-hero {
  padding: 10rem 0 4rem;
  background: var(--gradient-hero);
  text-align: center;
}

.page-hero h1 {
  color: var(--color-white);
  margin-bottom: 1rem;
}

.page-hero p {
  color: rgba(240, 247, 250, 0.7);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

.page-content {
  padding: var(--section-padding);
}

.content-block {
  max-width: 800px;
  margin: 0 auto 3rem;
}

.content-block h2 {
  margin-bottom: 1rem;
}

.content-block p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.content-block ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.content-block li {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 0.5rem;
}

/* Product grid for inner pages */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 40px rgba(10, 110, 138, 0.1);
}

.product-image {
  aspect-ratio: 1;
  background: linear-gradient(135deg, #e8f4f8 0%, #d0ebf1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-image svg {
  width: 80px;
  height: 80px;
  color: var(--color-primary);
  opacity: 0.4;
}

.product-info {
  padding: 1.5rem;
}

.product-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.product-info p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.product-price {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* Info cards */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.info-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.info-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.info-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* Contact form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 110, 138, 0.1);
}

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

/* ========================================
   Animations
   ======================================== */

[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 4rem 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 5rem 1.5rem 2rem;
    background: var(--color-dark);
    transition: right var(--transition-base);
    overflow-y: auto;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-link {
    padding: 0.75rem 1rem;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    margin: 0.25rem 0 0.5rem;
    padding: 0.25rem;
  }

  .dropdown-menu a {
    color: rgba(255, 255, 255, 0.7);
    padding: 0.5rem 1rem;
  }

  .dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-accent);
  }

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

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

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .categories-grid {
    grid-template-columns: 1fr;
  }
}