/* ==========================================================================
   Seven Hills Data - Main Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --color-deep: #1e3c56;
  --color-mid: #2a5272;
  --color-light: #3a6a8a;
  --color-accent: #4a8cba;
  --color-glow: #5ca0d0;

  /* Text Colors */
  --text-primary: #f0f4f8;
  --text-secondary: #b8c9d9;
  --text-muted: #7a94a8;

  /* Borders & Surfaces */
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(74, 140, 186, 0.4);
  --surface-elevated: rgba(42, 82, 114, 0.3);

  /* Typography Scale (Fluid) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1.5rem + 5vw, 6rem);
  --text-display: clamp(3rem, 2rem + 5vw, 8rem);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Font Stack */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                  Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 1200px;
  --section-padding: clamp(2rem, 5vh, 4rem);
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-secondary);
  background-color: var(--color-deep);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--text-primary);
  font-weight: 600;
  transition: top var(--transition-fast);
}

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

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

/* Focus Styles */
:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Particle Canvas
   -------------------------------------------------------------------------- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
main {
  position: relative;
  z-index: 1;
}

.section {
  min-height: auto;
  padding: var(--section-padding) var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

.section__title {
  font-size: var(--text-xl);
  font-weight: 300;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-xl);
  text-align: center;
}


/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.section--hero {
  min-height: 100vh;
  min-height: 100dvh;
  text-align: center;
}

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

.logo-container {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 30px rgba(92, 160, 208, 0.3),
              0 0 60px rgba(92, 160, 208, 0.1);
  animation: logoGlow 8s ease-in-out infinite;
}

@keyframes logoGlow {
  0%, 100% {
    box-shadow: 0 0 30px rgba(92, 160, 208, 0.3),
                0 0 60px rgba(92, 160, 208, 0.1);
  }
  50% {
    box-shadow: 0 0 40px rgba(92, 160, 208, 0.4),
                0 0 80px rgba(92, 160, 208, 0.15);
  }
}

.logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__title {
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--text-primary);
  letter-spacing: 0.2em;
  margin: 0;
}

.hero__tagline {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid var(--border-subtle);
  border-radius: 25px;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.scroll-indicator span {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 28px; opacity: 0.3; }
}

/* --------------------------------------------------------------------------
   Bridge Section
   -------------------------------------------------------------------------- */
.section--bridge {
  min-height: auto;
  padding: var(--space-2xl) var(--space-lg);
}

.bridge__statement {
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
  max-width: 800px;
  letter-spacing: 0.02em;
}

.bridge__emphasis {
  color: var(--text-primary);
  font-weight: 400;
}

/* --------------------------------------------------------------------------
   Services Section
   -------------------------------------------------------------------------- */
.section--services {
  min-height: auto;
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-lg);
  max-width: var(--max-width);
  width: 100%;
}

.service-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  grid-column: span 6;
}

.service-card:hover {
  border-color: var(--border-hover);
  box-shadow: inset 0 0 40px rgba(74, 140, 186, 0.08);
  transform: translateY(-2px);
}

.service-card--large {
  grid-column: span 7;
}

.service-card--offset {
  grid-column: span 5;
  margin-top: var(--space-xl);
}

.service-card--wide {
  grid-column: span 8;
  margin-left: auto;
}

.service-card--accent {
  grid-column: span 5;
  border-color: var(--border-hover);
}

.service-card__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.service-card__description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Services Grid - Mobile */
@media (max-width: 768px) {
  .services__grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .service-card--large,
  .service-card--offset,
  .service-card--wide,
  .service-card--accent {
    grid-column: span 1;
    margin-top: 0;
    margin-left: 0;
  }
}

/* --------------------------------------------------------------------------
   Credentials Section
   -------------------------------------------------------------------------- */
.section--credentials {
  min-height: auto;
  padding: var(--space-2xl) var(--space-lg);
}

.credentials__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2xl);
  max-width: var(--max-width);
}

.credential {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-slow);
}

.credential.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.credential__number {
  display: block;
  font-size: var(--text-display);
  font-weight: 200;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
  opacity: 0.9;
}

.credential--location .credential__number {
  font-size: var(--text-3xl);
  letter-spacing: 0.05em;
}

.credential__label {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* Credentials - Mobile */
@media (max-width: 768px) {
  .credentials__grid {
    flex-direction: column;
    gap: var(--space-2xl);
  }

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

  .credential--location .credential__number {
    font-size: var(--text-2xl);
  }
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.section--about {
  min-height: auto;
  padding: var(--space-2xl) var(--space-lg);
  align-items: center;
  text-align: center;
}

.about__content {
  max-width: 650px;
}

.about__lead {
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.02em;
}

.about__text {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.about__text--emphasis {
  color: var(--text-primary);
  font-weight: 400;
  margin-top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.section--contact {
  min-height: auto;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
}

.contact__intro {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.contact__cta {
  margin-bottom: var(--space-xl);
}

/* Primary Button */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border: 2px solid var(--color-accent);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
  z-index: -1;
}

.btn:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.btn:hover {
  color: var(--color-deep);
}

.btn--primary {
  min-width: 200px;
}

/* Contact Alternative */
.contact__alternative {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.contact__alternative p {
  margin-bottom: var(--space-sm);
}

.contact__email {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 2px;
}

.contact__email:hover {
  color: var(--text-primary);
  border-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Scroll Reveal Animation Classes
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow),
              transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for service cards */
.service-card:nth-child(1) { transition-delay: 0s; }
.service-card:nth-child(2) { transition-delay: 0.1s; }
.service-card:nth-child(3) { transition-delay: 0.2s; }
.service-card:nth-child(4) { transition-delay: 0.3s; }
.service-card:nth-child(5) { transition-delay: 0.4s; }

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

  html {
    scroll-behavior: auto;
  }

  .scroll-indicator {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  #particles-canvas,
  .scroll-indicator {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    min-height: auto;
    page-break-inside: avoid;
  }
}