/*
 * Design Brief: Aispheres ← inspired by https://www.aispherelab.com/
 *
 * Structure: promo-banner → sticky nav → hero-split → stat-band →
 *   platform-tracks → tabbed-capabilities → solutions-grid → tech-split → cta-band → footer
 *
 * Reference DNA: dark neural-network backdrop, cyan→purple gradients,
 * glass panels with glow borders, gradient headline accents, stat cards,
 * pill CTAs, restrained scroll reveals — NOT generic blue-orb SaaS.
 */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --color-bg: #050816;
  --color-bg-alt: #0a1024;
  --color-bg-band: #0c1530;
  --color-surface: rgba(12, 21, 48, 0.72);
  --color-surface-strong: rgba(18, 28, 58, 0.88);
  --color-text: #f1f5f9;
  --color-text-muted: rgba(203, 213, 225, 0.78);
  --color-accent: #06d6ff;
  --color-accent-secondary: #9d4edd;
  --color-accent-hover: #38e8ff;
  --color-border: rgba(6, 214, 255, 0.22);
  --color-border-glow: rgba(6, 214, 255, 0.42);
  --color-highlight: #fbbf24;
  --gradient-primary: linear-gradient(135deg, #06d6ff 0%, #7c3aed 100%);
  --gradient-banner: linear-gradient(90deg, #7c3aed 0%, #06d6ff 100%);
  --gradient-text: linear-gradient(90deg, #06d6ff 0%, #c084fc 100%);
  --font-display: "Plus Jakarta Sans", "Segoe UI", Arial, Helvetica, sans-serif;
  --font-body: "Plus Jakarta Sans", "Segoe UI", Arial, Helvetica, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --space-section: clamp(4rem, 8vw, 7rem);
  --space-grid: clamp(1.5rem, 3vw, 2.5rem);
  --container-max: 1180px;
  --header-height: 72px;
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-reveal: 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-glow: 0 0 24px rgba(6, 214, 255, 0.18);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-base); }
a:hover { color: var(--color-accent-hover); }

ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, p { margin: 0; }

.container {
  width: min(100% - 2rem, var(--container-max));
  margin-inline: auto;
}

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

.section-eyebrow {
  display: inline-block;
  padding: 0.35rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(6, 214, 255, 0.08);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-sub {
  margin-top: 1rem;
  max-width: 640px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

.section-header .section-sub { margin-inline: auto; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
}

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

.btn--primary {
  color: #fff;
  background: var(--gradient-primary);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(6, 214, 255, 0.35);
}

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

.btn--secondary:hover {
  background: rgba(6, 214, 255, 0.08);
  border-color: var(--color-accent);
}

.btn--ghost {
  color: var(--color-accent);
  background: rgba(6, 214, 255, 0.06);
  border: 1px solid var(--color-border);
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
}

/* Promo Banner */
.promo-banner {
  background: var(--gradient-banner);
  text-align: center;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
}

.promo-banner a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 8, 22, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(6, 214, 255, 0.1);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background: rgba(5, 8, 22, 0.96);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

.site-nav a:hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Hero — split layout */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3rem, 6vw, 5rem);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(124, 58, 237, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 60%, rgba(6, 214, 255, 0.12) 0%, transparent 55%),
    var(--color-bg);
}

.hero__network {
  position: absolute;
  inset: 0;
  opacity: 0.55;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  min-height: min(85vh, 820px);
}

.hero__eyebrow {
  display: inline-block;
  padding: 0.4rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero__subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 1.75rem;
}

.hero__features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero__features li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.hero__features .icon-bolt {
  flex-shrink: 0;
  color: var(--color-highlight);
  font-size: 1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__visual {
  position: relative;
}

.hero__panel {
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  backdrop-filter: blur(16px);
}

.hero__panel-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero__panel-title span { color: var(--color-accent); }

.hero__panel-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.hero__diagram {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* Stat Band */
.stat-band {
  padding-block: clamp(2rem, 4vw, 3rem);
  background: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.stat-band__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-grid);
}

.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.stat-card:hover {
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-glow);
}

.stat-card__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 0.75rem;
  color: var(--color-accent);
}

.stat-card__value {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-card__label {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Platform Overview — horizontal track cards */
.platform {
  padding-block: var(--space-section);
  background: var(--color-bg);
}

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

.track-card {
  position: relative;
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

.track-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.track-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-glow);
}

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

.track-card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  padding: 10px;
  background: rgba(6, 214, 255, 0.08);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.track-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.track-card p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-bottom: 1.25rem;
}

.track-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}

.track-card__link:hover { color: var(--color-accent-hover); }

/* Capabilities — tabbed layout */
.capabilities {
  padding-block: var(--space-section);
  background: var(--color-bg-band);
}

.cap-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.cap-tab {
  padding: 0.65rem 1.35rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-base);
}

.cap-tab.is-active,
.cap-tab:hover {
  color: var(--color-text);
  border-color: var(--color-accent);
  background: rgba(6, 214, 255, 0.1);
}

.cap-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}

.cap-panel.is-active { display: grid; }

.cap-panel__content h3 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cap-panel__content p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.cap-panel__list li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid rgba(6, 214, 255, 0.08);
  font-size: 0.925rem;
  color: var(--color-text-muted);
}

.cap-panel__list li::before {
  content: "✦";
  color: var(--color-accent);
  font-size: 0.75rem;
}

.cap-panel__visual {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Solutions — staggered 2x2 grid */
.solutions {
  padding-block: var(--space-section);
  background: var(--color-bg);
}

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

.solution-block {
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.solution-block:nth-child(odd) { transform: translateY(0); }
.solution-block:nth-child(even) { transform: translateY(1.5rem); }

.solution-block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.solution-block__tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-secondary);
  margin-bottom: 0.75rem;
}

.solution-block h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.solution-block p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-bottom: 1.25rem;
}

/* Technology — split reverse */
.technology {
  padding-block: var(--space-section);
  background: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.tech-split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.tech-split__visual {
  order: -1;
  position: relative;
  padding: 2.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
}

.tech-split__visual svg { width: 100%; height: auto; }

.tech-module {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(6, 214, 255, 0.1);
}

.tech-module:last-child { border-bottom: none; }

.tech-module__num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-accent);
  background: rgba(6, 214, 255, 0.1);
  border-radius: var(--radius-sm);
}

.tech-module h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.tech-module p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* CTA Band */
.cta-band {
  padding-block: var(--space-section);
  background:
    radial-gradient(ellipse 70% 80% at 50% 100%, rgba(124, 58, 237, 0.25) 0%, transparent 60%),
    var(--color-bg-band);
}

.cta-band__inner {
  text-align: center;
  padding: clamp(2.5rem, 5vw, 4rem);
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
}

.cta-band__inner .section-heading { margin-bottom: 0.75rem; }

.cta-band__inner .section-sub {
  margin-inline: auto;
  margin-bottom: 2rem;
}

.cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* Footer */
.site-footer {
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
  background: #030510;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.footer-col a {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 0.35rem 0;
  transition: color var(--transition-base);
}

.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(6, 214, 255, 0.1);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-bottom a { color: var(--color-accent); }

/* Modals */
.modal[hidden] { display: none; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(3, 5, 16, 0.82);
  backdrop-filter: blur(6px);
}

.modal__panel {
  position: relative;
  width: min(100%, 520px);
  max-height: 85vh;
  overflow-y: auto;
  padding: 2.25rem;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  animation: modalIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-text-muted);
  background: rgba(6, 214, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition-base), border-color var(--transition-base);
}

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

.modal__panel h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  padding-right: 2rem;
}

.modal__panel p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.modal__panel ul {
  margin-bottom: 1.5rem;
}

.modal__panel li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.925rem;
}

.modal__panel li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* Policy pages */
.page-content {
  padding-block: calc(var(--header-height) + 3rem) 4rem;
  min-height: 60vh;
}

.page-content h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.page-content .updated {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 2.5rem;
}

.page-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
}

.page-content p,
.page-content li {
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.page-content ul { padding-left: 1.25rem; list-style: disc; }