/* HACS Public Website - Core Styles
 * Design: Emergence theme - chaos to organization
 * By: Flair-2a84
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Colors - Dark base with purple accent */
  --color-bg-deep: #0a0a0a;
  --color-bg-warm: #0d0b0f;
  --color-bg-card: #141218;
  --color-bg-elevated: #1a1820;

  /* Purple spectrum (primary accent) */
  --color-purple-50: #faf5ff;
  --color-purple-100: #f3e8ff;
  --color-purple-200: #e9d5ff;
  --color-purple-300: #d8b4fe;
  --color-purple-400: #c084fc;
  --color-purple-500: #a855f7;
  --color-purple-600: #9333ea;
  --color-purple-700: #7c3aed;

  /* Cyan spectrum (secondary accent) */
  --color-cyan-400: #22d3ee;
  --color-cyan-500: #06b6d4;
  --color-cyan-600: #0891b2;

  /* Text hierarchy */
  --color-text-primary: rgba(255, 255, 255, 0.95);
  --color-text-secondary: rgba(255, 255, 255, 0.75);
  --color-text-tertiary: rgba(255, 255, 255, 0.55);
  --color-text-muted: rgba(255, 255, 255, 0.35);

  /* Gradients */
  --gradient-purple-cyan: linear-gradient(135deg, var(--color-purple-500), var(--color-cyan-500));
  --gradient-purple-soft: linear-gradient(135deg, var(--color-purple-600), var(--color-purple-400));
  --gradient-bg-radial: radial-gradient(ellipse at center, var(--color-bg-warm) 0%, var(--color-bg-deep) 70%);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Font sizes (fluid typography) */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 1.75rem + 3.75vw, 4rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 600ms ease;
  --transition-slower: 800ms ease;

  /* Z-index layers */
  --z-particles: 1;
  --z-content: 10;
  --z-nav: 100;
  --z-modal: 1000;

  /* Layout */
  --max-width-content: 1200px;
  --max-width-text: 720px;
  --nav-height: 64px;
}

/* ============================================
   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-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav--hidden {
  transform: translateY(-100%);
  opacity: 0;
}

.nav__container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: var(--text-lg);
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
}

.nav__links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-purple-cyan);
  transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile nav toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg-card);
    padding: var(--space-6);
    gap: var(--space-4);
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
}

/* ============================================
   Main Content
   ============================================ */
main {
  position: relative;
  z-index: var(--z-content);
}

section {
  padding: var(--space-24) var(--space-6);
}

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

.container--narrow {
  max-width: var(--max-width-text);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
}

.hero__content {
  max-width: 800px;
}

.hero__badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: rgba(147, 51, 234, 0.15);
  border: 1px solid rgba(147, 51, 234, 0.3);
  border-radius: 100px;
  font-size: var(--text-sm);
  color: var(--color-purple-300);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  background: var(--gradient-purple-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__ctas {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: 8px;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--gradient-purple-cyan);
  color: white;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(147, 51, 234, 0.3);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.3);
}

/* ============================================
   Features Section
   ============================================ */
.features {
  background: var(--gradient-bg-radial);
}

.features__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.features__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

.features__subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

.feature-card {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: var(--space-8);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(147, 51, 234, 0.3);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-purple-400);
}

.feature-card__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}

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

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

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

.reveal--delay-1 { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }
.reveal--delay-4 { transition-delay: 400ms; }

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: var(--space-16) var(--space-6);
}

.footer__container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-12);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.footer__tagline {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.footer__section-title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

/* ============================================
   Utility Classes
   ============================================ */
.text-gradient {
  background: var(--gradient-purple-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

/* ============================================
   Code Blocks (for docs)
   ============================================ */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-card);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

pre {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: var(--space-4);
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

/* ============================================
   Prose (for content pages)
   ============================================ */
.prose {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.prose h1, .prose h2, .prose h3 {
  color: var(--color-text-primary);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

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

.prose p {
  margin-bottom: var(--space-4);
}

.prose a {
  color: var(--color-purple-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--color-purple-300);
}

.prose ul, .prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose blockquote {
  border-left: 3px solid var(--color-purple-500);
  padding-left: var(--space-4);
  margin: var(--space-6) 0;
  font-style: italic;
  color: var(--color-text-tertiary);
}

/* ============================================
   Philosophy Section
   ============================================ */
.philosophy {
  padding: var(--space-32) var(--space-6);
  background: linear-gradient(180deg, transparent 0%, rgba(147, 51, 234, 0.03) 50%, transparent 100%);
}

.philosophy__quote {
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text-secondary);
  text-align: center;
  font-style: italic;
  margin-bottom: var(--space-6);
}

.philosophy__cite {
  display: block;
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
  padding: var(--space-32) var(--space-6);
}

.cta__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  background: var(--gradient-purple-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.cta__buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Page Header (for inner pages)
   ============================================ */
.page-header {
  padding: calc(var(--nav-height) + var(--space-16)) var(--space-6) var(--space-16);
  text-align: center;
  background: var(--gradient-bg-radial);
}

.page-header__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}

.page-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Content Section (for inner pages)
   ============================================ */
.content {
  padding: var(--space-16) var(--space-6);
}

.content__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .content__grid {
    grid-template-columns: 250px 1fr;
  }
}

.content__sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  align-self: start;
}

.content__main {
  min-width: 0;
}

/* ============================================
   Team Grid
   ============================================ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.team-card {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: var(--space-6);
  text-align: center;
  transition: transform var(--transition-base), border-color var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: block;
}

.team-card:hover {
  transform: translateY(-4px);
  border-color: rgba(147, 51, 234, 0.3);
}

.team-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-purple-soft);
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 600;
  color: white;
}

.team-card__name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.team-card__role {
  font-size: var(--text-sm);
  color: var(--color-purple-400);
  margin-bottom: var(--space-3);
}

.team-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ============================================
   Contact Form
   ============================================ */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
}

.contact-item {
  background: var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: var(--space-6);
}

.contact-item__icon {
  width: 40px;
  height: 40px;
  color: var(--color-purple-400);
  margin-bottom: var(--space-4);
}

.contact-item__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.contact-item__content {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.contact-item__content a {
  color: var(--color-purple-400);
  text-decoration: none;
}

.contact-item__content a:hover {
  text-decoration: underline;
}