/* ==========================================================================
   AURA — Premium Landing Page
   ========================================================================== */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }

/* ---------- Tokens ---------- */
:root {
  --bg:          #08090e;
  --bg-2:        #0c0d14;
  --surface:     rgba(255, 255, 255, 0.03);
  --surface-2:   rgba(255, 255, 255, 0.06);
  --border:      rgba(255, 255, 255, 0.06);
  --border-2:    rgba(255, 255, 255, 0.1);

  --text:        #ebebf0;
  --text-2:      #a1a1b5;
  --text-3:      #6b6b80;

  --accent:      #6366f1;
  --accent-2:    #06b6d4;
  --grad:        linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --grad-text:   linear-gradient(135deg, #818cf8 0%, #22d3ee 100%);
  --grad-soft:   linear-gradient(135deg, rgba(99,102,241,.12) 0%, rgba(6,182,212,.08) 100%);

  --radius:      12px;
  --radius-lg:   20px;
  --container:   1120px;
  --ease:        cubic-bezier(.2,.8,.2,1);
  --font:        'Inter', system-ui, -apple-system, sans-serif;
  --mono:        'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
}

/* ---------- Base ---------- */
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: rgba(8, 9, 14, .7);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s var(--ease);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 60px;
  gap: 32px;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1.5px;
  color: var(--text);
}

.nav__logo {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
}

.nav__links {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.nav__links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: .3px;
  transition: color .2s;
}

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

.nav__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 8px;
}

.nav__toggle span {
  width: 16px;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: transform .25s var(--ease), opacity .25s;
}

.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child  { transform: translateY(-3.75px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .2px;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s, border-color .2s;
  white-space: nowrap;
}

.btn--sm { padding: 8px 16px; font-size: 13px; border-radius: 8px; }

.btn--primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(99,102,241,.3), 0 8px 24px rgba(99,102,241,.25);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px rgba(99,102,241,.4), 0 12px 32px rgba(99,102,241,.35);
}

.btn--ghost {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-2);
}

.btn--ghost:hover {
  background: var(--surface-2);
  border-color: rgba(255,255,255,.18);
  transform: translateY(-1px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 160px 0 120px;
  overflow: hidden;
  z-index: 1;
}

.hero__glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(99,102,241,.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero__inner {
  position: relative;
  text-align: center;
  max-width: 800px;
  z-index: 2;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .5px;
  margin-bottom: 32px;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px var(--accent-2);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .4; transform: scale(1.4); }
}

.hero__title {
  font-size: clamp(42px, 7vw, 80px);
  line-height: 1.0;
  font-weight: 900;
  letter-spacing: -.03em;
  margin-bottom: 24px;
  color: var(--text);
}

.hero__sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-2);
  font-weight: 400;
  margin-bottom: 40px;
  letter-spacing: -.01em;
}

.hero__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}

.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 0 32px;
}

.stat__value {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat__label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-3);
  font-weight: 500;
}

.stat__divider {
  width: 1px;
  height: 32px;
  background: var(--border-2);
}

/* ---------- Section ---------- */
.section {
  position: relative;
  padding: 120px 0;
  z-index: 1;
}

.section--alt {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  text-align: center;
}

.section__title {
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -.03em;
  text-align: center;
  margin-bottom: 64px;
}

/* ---------- Demo ---------- */
.demo {
  max-width: 760px;
  margin: 0 auto;
}

.demo__window {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-2);
  background: #0a0b12;
  box-shadow: 0 24px 80px rgba(0,0,0,.5), 0 0 0 1px rgba(255,255,255,.03);
}

.demo__bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(255,255,255,.02);
  border-bottom: 1px solid var(--border);
}

.demo__dots {
  display: flex;
  gap: 6px;
}

.demo__dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.demo__dots span:nth-child(1) { background: #ff5f57; }
.demo__dots span:nth-child(2) { background: #febc2e; }
.demo__dots span:nth-child(3) { background: #28c840; }

.demo__bar-title {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
}

.demo__body {
  padding: 28px 24px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.8;
  min-height: 220px;
}

.demo__line {
  display: flex;
  align-items: center;
  gap: 0;
}

.demo__prompt {
  color: var(--accent);
  margin-right: 10px;
  user-select: none;
}

.demo__cmd {
  color: var(--text);
}

.demo__cursor {
  color: var(--accent-2);
  animation: blink 1s steps(2) infinite;
  margin-left: 1px;
}

@keyframes blink { to { opacity: 0; } }

.demo__output {
  color: var(--text-2);
  margin-top: 8px;
  min-height: 100px;
}

.demo__output .ok {
  color: var(--accent-2);
}

.demo__commands {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.demo__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all .2s var(--ease);
}

.demo__tag:hover,
.demo__tag.active {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border-2);
}

.demo__tag.active {
  border-color: rgba(99,102,241,.3);
  box-shadow: 0 0 12px rgba(99,102,241,.1);
}

/* ---------- Compare ---------- */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 760px;
  margin: 0 auto 32px;
}

.compare-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}

.compare-card--highlight {
  background: rgba(99,102,241,.04);
  border-color: rgba(99,102,241,.2);
  box-shadow: 0 0 40px rgba(99,102,241,.08);
}

.compare-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 20px;
  letter-spacing: -.01em;
}

.compare-card__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.compare-card__list li {
  font-size: 14px;
  color: var(--text-2);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.compare-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}

.compare-card__list--dim li::before {
  background: var(--text-3);
  opacity: .5;
}

.compare-card__list li strong {
  color: var(--text);
  font-weight: 600;
}

.compare-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .3px;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
}

/* ---------- Steps ---------- */
.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: 860px;
  margin: 0 auto;
}

.step {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}

.step__num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.step__icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--grad-soft);
  border: 1px solid var(--border-2);
  display: grid;
  place-items: center;
  margin: 0 auto 20px;
  color: var(--text-2);
}

.step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -.01em;
}

.step p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.5;
}

.step__connector {
  display: flex;
  align-items: center;
  padding-top: 56px;
  flex-shrink: 0;
}

/* ---------- Capabilities ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.cap {
  padding: 28px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.cap:hover {
  transform: translateY(-3px);
  border-color: var(--border-2);
}

.cap__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border-2);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  color: var(--text-2);
}

.cap h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -.01em;
}

.cap p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}

/* ---------- Architecture ---------- */
.arch {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 32px;
  max-width: 740px;
  margin: 0 auto;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}

.arch__col {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.arch__module {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 10px;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: border-color .2s;
}

.arch__module:hover {
  border-color: var(--border-2);
}

.arch__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-3);
  opacity: .3;
  flex-shrink: 0;
}

.arch__dot--active {
  background: var(--accent-2);
  opacity: 1;
  box-shadow: 0 0 6px var(--accent-2);
}

.arch__dot--inline {
  display: inline-block;
  vertical-align: middle;
  margin-right: 6px;
}

.arch__center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.arch__core {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px;
  border-radius: 16px;
  background: rgba(99,102,241,.06);
  border: 1px solid rgba(99,102,241,.15);
}

.arch__core span {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-2);
}

.arch__legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-3);
}

/* ---------- Philosophy ---------- */
.philosophy {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}

.philosophy__item {
  padding: 40px 28px;
  background: var(--bg-2);
  text-align: center;
}

.philosophy__item h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -.01em;
}

.philosophy__item p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.55;
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  padding: 120px 0;
  z-index: 1;
}

.cta__inner {
  text-align: center;
  padding: 80px 40px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(500px 250px at 50% 0%, rgba(99,102,241,.12), transparent),
    var(--surface);
  border: 1px solid var(--border-2);
}

.cta__title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: -.03em;
  margin-bottom: 12px;
}

.cta__sub {
  color: var(--text-2);
  font-size: 16px;
  margin-bottom: 32px;
}

.cta__sub code {
  font-family: var(--mono);
  font-size: 13px;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.2);
  color: var(--text);
}

.cta__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 16px 0;
  position: relative;
  z-index: 1;
}

.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer__brand {
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 1.5px;
  color: var(--text);
}

.footer__sep {
  width: 1px;
  height: 14px;
  background: var(--border-2);
}

.footer__tag {
  font-size: 12px;
  color: var(--text-3);
}

.footer__right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-3);
}

.footer__gh {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-2);
  transition: color .2s;
}

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

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .compare-grid { grid-template-columns: 1fr; max-width: 400px; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .philosophy { grid-template-columns: repeat(2, 1fr); }
  .arch { flex-direction: column; align-items: center; }
  .arch__center { order: -1; }

  .steps { flex-direction: column; align-items: center; gap: 24px; }
  .step { max-width: 320px; }
  .step__connector { display: none; }
}

@media (max-width: 640px) {
  .hero { padding: 120px 0 80px; }
  .section { padding: 80px 0; }

  .nav__links {
    position: absolute;
    top: 60px;
    left: 12px;
    right: 12px;
    background: rgba(8,9,14,.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-2);
    border-radius: var(--radius);
    padding: 16px;
    flex-direction: column;
    gap: 12px;
    display: none;
    box-shadow: 0 16px 48px rgba(0,0,0,.4);
  }

  .nav__links.is-open { display: flex; }
  .nav__right .btn { display: none; }
  .nav__toggle { display: flex; }

  .hero__stats { flex-wrap: wrap; gap: 16px; }
  .stat { padding: 0 20px; }
  .stat__divider { display: none; }

  .cap-grid { grid-template-columns: 1fr; }
  .philosophy { grid-template-columns: 1fr; }

  .cta__inner { padding: 48px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}