/* ============================================
   Totterfly Landing Page Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
  --bg: #080b1a;
  --surface: #0f1329;
  --primary: #38bdf8;
  --primary-glow: rgba(56, 189, 248, 0.35);
  --secondary: #a855f7;
  --secondary-glow: rgba(168, 85, 247, 0.35);
  --text: #f5f5f5;
  --muted: #94a3b8;
  --border: #1e2448;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-width: 1120px;
  --nav-height: 64px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* --- Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--space-xs);
  text-align: center;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  text-align: center;
}

.section-subtitle {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  background: rgba(8, 11, 26, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

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

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

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

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

.nav-links a:hover {
  color: var(--text);
}

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

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity 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);
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(56, 189, 248, 0.1) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(168, 85, 247, 0.08) 0%, transparent 60%);
  animation: heroShift 12s ease-in-out infinite alternate;
}

@keyframes heroShift {
  0% {
    opacity: 0.7;
    transform: scale(1) translateY(0);
  }
  100% {
    opacity: 1;
    transform: scale(1.05) translateY(-20px);
  }
}

/* Floating particles */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-particles .dot {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.3;
  animation: float linear infinite;
}

.hero-particles .dot:nth-child(1) { left: 15%; top: 20%; animation-duration: 8s; animation-delay: 0s; }
.hero-particles .dot:nth-child(2) { left: 45%; top: 70%; animation-duration: 10s; animation-delay: 1s; background: var(--secondary); }
.hero-particles .dot:nth-child(3) { left: 75%; top: 30%; animation-duration: 7s; animation-delay: 2s; }
.hero-particles .dot:nth-child(4) { left: 85%; top: 65%; animation-duration: 9s; animation-delay: 0.5s; background: var(--secondary); opacity: 0.2; }
.hero-particles .dot:nth-child(5) { left: 25%; top: 80%; animation-duration: 11s; animation-delay: 3s; }
.hero-particles .dot:nth-child(6) { left: 60%; top: 15%; animation-duration: 8.5s; animation-delay: 1.5s; }

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 0.15;
  }
  25% {
    transform: translateY(-30px) translateX(10px);
    opacity: 0.35;
  }
  50% {
    transform: translateY(-15px) translateX(-10px);
    opacity: 0.2;
  }
  75% {
    transform: translateY(-40px) translateX(5px);
    opacity: 0.3;
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-logo {
  max-width: 340px;
  width: 100%;
  height: auto;
  margin: 0 auto var(--space-md);
  filter: drop-shadow(0 0 30px rgba(56, 189, 248, 0.2)) drop-shadow(0 0 60px rgba(168, 85, 247, 0.1));
}

.hero-motto {
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: var(--space-sm);
}

.hero-tagline {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto var(--space-md);
  line-height: 1.7;
  text-align: justify;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-arrow {
  transition: transform var(--transition);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* --- About --- */
.about {
  border-top: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
  margin-top: var(--space-lg);
}

.about-text p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--space-sm);
  text-align: justify;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.stat {
  text-align: center;
  padding: var(--space-sm);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.35rem;
  font-weight: 500;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

.pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.pillar:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.pillar-icon {
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.pillar-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.pillar-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.5;
}

/* --- Products --- */
.products {
  border-top: 1px solid var(--border);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.product-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
  gap: var(--space-sm);
}

.product-name {
  font-size: 1.15rem;
  font-weight: 700;
}

.product-status {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.product-status.live {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

.product-status.built {
  background: rgba(168, 85, 247, 0.15);
  color: var(--secondary);
}

.product-domain {
  font-size: 0.8rem;
  color: var(--secondary);
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.product-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: var(--space-sm);
  text-align: justify;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.08);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.15);
}

/* --- Contact --- */
.contact {
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact .section-subtitle {
  margin: 0 auto var(--space-md);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
  margin-bottom: var(--space-sm);
}

.contact-email:hover {
  color: var(--secondary);
}

.contact-note {
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
  text-align: center;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-md) 0;
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--muted);
}

.footer p + p {
  margin-top: 0.35rem;
}

.footer .highlight {
  color: var(--text);
  font-weight: 500;
}

/* --- Scroll Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Stagger children */
.stagger > .fade-up:nth-child(1) { transition-delay: 0s; }
.stagger > .fade-up:nth-child(2) { transition-delay: 0.08s; }
.stagger > .fade-up:nth-child(3) { transition-delay: 0.16s; }
.stagger > .fade-up:nth-child(4) { transition-delay: 0.24s; }
.stagger > .fade-up:nth-child(5) { transition-delay: 0.32s; }
.stagger > .fade-up:nth-child(6) { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 900px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 640px) {
  .section {
    padding: var(--space-lg) 0;
  }

  /* Mobile nav */
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--surface);
    border-left: 1px solid var(--border);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 999;
  }

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

  .nav-links a {
    font-size: 1.1rem;
  }

  /* Mobile overlay */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 998;
  }

  .nav-overlay.open {
    display: block;
  }

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

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

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

  .hero-logo {
    max-width: 240px;
  }

  .contact-email {
    font-size: 1.1rem;
  }
}