/* ============================================
   FURLS - Design System & Core Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Colors */
  --color-bg: #07070a;
  --color-bg-elevated: #0f0f14;
  --color-bg-card: #13131a;
  --color-bg-card-hover: #1a1a24;
  --color-surface: #1c1c27;
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);

  --color-text-primary: #f0f0f3;
  --color-text-secondary: #9898a6;
  --color-text-muted: #8585a0;

  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-accent-glow: rgba(59, 130, 246, 0.15);
  --color-accent-glow-strong: rgba(59, 130, 246, 0.3);

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

  --text-xs: 0.8125rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;

  /* 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;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1100px;
  --max-width-narrow: 720px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  font-size: 16px;
  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-secondary);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent-light);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

h1, h2, h3, h4 {
  color: var(--color-text-primary);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

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

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

::selection {
  background: var(--color-accent);
  color: white;
}

/* --- Focus styles --- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --- Skip to content --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-lg);
  z-index: 10001;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: white;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-md);
  color: white;
}

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

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

.text-gradient {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.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;
}

/* --- Noise/grain texture overlay --- */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-lg) 0;
  transition: background var(--duration-normal) var(--ease-out),
              backdrop-filter var(--duration-normal) var(--ease-out);
}

.nav--scrolled {
  background: rgba(7, 7, 10, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
}

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

.logo {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.04em;
  line-height: 1;
  text-decoration: none;
}

.logo__dot {
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  top: 1px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav__link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  letter-spacing: 0.01em;
}

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

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-5xl) var(--space-xl);
  position: relative;
}

.hero__content {
  max-width: 800px;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-accent-light);
  background: var(--color-accent-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  margin-bottom: var(--space-2xl);
  letter-spacing: 0.02em;
}

.hero__title {
  font-size: var(--text-6xl);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  margin-bottom: var(--space-xl);
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 580px;
  margin: 0 auto var(--space-2xl);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-base);
  font-weight: 500;
  color: white;
  background: var(--color-accent);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  border: 1px solid transparent;
}

.hero__cta:hover {
  color: white;
  background: #2563eb;
  border-color: #2563eb;
  box-shadow: 0 0 40px var(--color-accent-glow-strong);
  transform: translateY(-1px);
}

/* Hero background glow */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* --- Sections --- */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section__label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
}

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

.section__description {
  max-width: 560px;
  margin-bottom: var(--space-3xl);
}

/* Section divider */
.section + .section::before {
  content: '';
  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}

/* --- Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

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

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

.card__text {
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* --- Stats / Credibility --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
  padding: var(--space-3xl) 0;
}

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

.stat__number {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

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

/* --- Contact --- */
.contact {
  text-align: center;
  padding: var(--space-5xl) 0;
}

.contact__email {
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-text-primary);
  position: relative;
  display: inline-block;
}

.contact__email::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-normal) var(--ease-out);
}

.contact__email:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

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

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__legal {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  opacity: 0.6;
}

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

.footer__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

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

/* --- Product Page --- */
.product-hero {
  padding: calc(var(--space-5xl) + 80px) 0 var(--space-5xl);
  text-align: center;
}

.product-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-xl);
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-base);
  font-weight: 500;
  color: white;
  background: var(--color-accent);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  border: 1px solid transparent;
}

.product-link:hover {
  color: white;
  background: #2563eb;
  border-color: #2563eb;
  box-shadow: 0 0 40px var(--color-accent-glow-strong);
  transform: translateY(-1px);
}

.product-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

/* --- Legal Pages --- */
.legal {
  padding: calc(var(--space-5xl) + 80px) 0 var(--space-5xl);
}

.legal h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-md);
}

.legal__updated {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3xl);
}

.legal h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-md);
}

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

.legal ul {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

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

.legal a {
  color: var(--color-accent-light);
}

/* --- Cookie Banner --- */
.cookie-banner {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 10000;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  max-width: 600px;
  width: calc(100% - var(--space-3xl));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transition: transform var(--duration-slow) var(--ease-out);
}

.cookie-banner--visible {
  transform: translateX(-50%) translateY(0);
}

.cookie-banner__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  flex: 1;
}

.cookie-banner__text a {
  color: var(--color-accent-light);
}

.cookie-banner__actions {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.cookie-btn {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  border: 1px solid transparent;
}

.cookie-btn--accept {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.cookie-btn--accept:hover {
  background: #2563eb;
}

.cookie-btn--decline {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: var(--color-border);
}

.cookie-btn--decline:hover {
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

/* --- Animated gradient orb (hero background) --- */
.hero__orb {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  pointer-events: none;
  z-index: -1;
  animation: orb-drift 20s ease-in-out infinite alternate;
}

.hero__orb--1 {
  top: -10%;
  left: 30%;
  background: var(--color-accent);
}

.hero__orb--2 {
  top: 10%;
  right: 20%;
  width: 400px;
  height: 400px;
  background: #8b5cf6;
  animation-delay: -7s;
  animation-duration: 25s;
}

@keyframes orb-drift {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
  100% { transform: translate(10px, -10px) scale(1.02); }
}

/* --- Glowing border card effect --- */
.card {
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent 40%, var(--color-accent-glow) 50%, transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

/* --- Stat number count-up glow --- */
.stat__number {
  position: relative;
}

.stat__number::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  opacity: 0.4;
  border-radius: 1px;
}

/* --- Email hover glow --- */
.contact__email {
  transition: text-shadow var(--duration-normal) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.contact__email:hover {
  text-shadow: 0 0 30px var(--color-accent-glow-strong);
}

/* --- CTA button glow pulse --- */
.hero__cta {
  position: relative;
}

.hero__cta::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--color-accent);
  opacity: 0;
  filter: blur(16px);
  transition: opacity var(--duration-normal) var(--ease-out);
  z-index: -1;
}

.hero__cta:hover::before {
  opacity: 0.4;
}

/* --- Horizontal rule glow on section dividers --- */
.section + .section::before {
  background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-accent-glow) 50%, var(--color-border) 80%, transparent);
  border: none;
  height: 1px;
}

/* --- Logo hover effect --- */
.logo {
  transition: text-shadow var(--duration-normal) var(--ease-out);
}

a:hover .logo {
  text-shadow: 0 0 20px var(--color-accent-glow-strong);
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.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; }

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero__orb {
    animation: none;
  }
}

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

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.5rem;
    --text-6xl: 3rem;
    --text-4xl: 2rem;
    --text-3xl: 1.5rem;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--space-5xl) + 60px) var(--space-lg) var(--space-4xl);
  }

  .hero__title {
    font-size: var(--text-5xl);
  }

  .nav__links {
    gap: var(--space-lg);
  }

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

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

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .cookie-banner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
    max-width: calc(100vw - var(--space-2xl));
    width: calc(100vw - var(--space-2xl));
  }

  .contact__email {
    font-size: var(--text-2xl);
  }

  .section {
    padding: var(--space-4xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --text-6xl: 2.25rem;
    --text-5xl: 2rem;
  }

  .container, .container--narrow {
    padding: 0 var(--space-lg);
  }

  .nav__inner {
    padding: 0 var(--space-lg);
  }

  .footer__inner {
    padding: 0 var(--space-lg);
  }
}