/*
 * Design Brief: Nexivolt ← inspired by https://nexivo.corecognitics.com/
 *
 * Structure: dark-header → centered-hero-dark → platform-split-white →
 *   statement-band-grey → capability-quad-grid → solution-showcase →
 *   tech-benefits-stats → cta-band → footer-dark
 *
 * Hero: centered typography on black; organic blob visual below
 * Reference patterns: pill CTAs, circular image masks, light/dark band alternation,
 *   purple nav accent, generous whitespace, restrained enterprise motion
 */

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

:root {
  --color-bg: #000000;
  --color-bg-alt: #eef2f6;
  --color-surface: #ffffff;
  --color-text: #0f1419;
  --color-text-muted: #5c6672;
  --color-text-on-dark: #ffffff;
  --color-text-muted-dark: rgba(255, 255, 255, 0.72);
  --color-accent: #9333ea;
  --color-accent-solar: #f59e0b;
  --color-accent-hover: #7c22ce;
  --color-accent-solar-hover: #d97706;
  --color-border: #e2e8f0;
  --color-border-dark: rgba(255, 255, 255, 0.12);

  --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --space-section: clamp(4rem, 8vw, 7rem);
  --space-grid: clamp(2rem, 4vw, 4rem);
  --container-max: 1200px;
  --header-height: 72px;

  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-reveal: 0.7s cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-card: 0 4px 24px rgba(15, 20, 25, 0.06);
  --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: min(100% - 2.5rem, var(--container-max));
  margin-inline: auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section-desc {
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  max-width: 62ch;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background var(--transition-base), color var(--transition-base),
    border-color var(--transition-base), transform var(--transition-base),
    box-shadow var(--transition-base);
}

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

.btn--primary {
  background: var(--color-text-on-dark);
  color: var(--color-bg);
  border: 2px solid var(--color-text-on-dark);
}

.btn--primary:hover {
  background: transparent;
  color: var(--color-text-on-dark);
}

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

.btn--primary-dark:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-on-dark);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text-on-dark);
  border: 2px solid rgba(255, 255, 255, 0.55);
}

.btn--secondary:hover {
  border-color: var(--color-text-on-dark);
  background: rgba(255, 255, 255, 0.08);
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-text);
}

.btn--outline-dark:hover {
  background: var(--color-text);
  color: var(--color-surface);
}

.btn--accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, #6366f1 100%);
  color: var(--color-text-on-dark);
  border: 2px solid transparent;
}

.btn--accent:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

/* Header — layout: sticky-dark-nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-dark);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.98);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1.5rem;
}

.site-header__logo {
  flex-shrink: 0;
}

.site-header__logo img {
  height: 32px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted-dark);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--color-accent);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header__actions .btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
}

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

/* Hero — layout: centered-typography-hero */
.hero {
  background: var(--color-bg);
  color: var(--color-text-on-dark);
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: var(--space-section);
  text-align: center;
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-solar);
  margin-bottom: 1.25rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted-dark);
  max-width: 52ch;
  margin-bottom: 2.25rem;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.hero__visual {
  width: min(100%, 920px);
  position: relative;
}

.hero__blob-frame {
  position: relative;
  border-radius: 50% 50% 45% 55% / 55% 45% 55% 45%;
  overflow: hidden;
  aspect-ratio: 16 / 7;
  background: linear-gradient(145deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  box-shadow: 0 32px 80px rgba(147, 51, 234, 0.15);
}

.hero__blob-svg {
  width: 100%;
  height: 100%;
}

/* Platform Overview — layout: platform-split */
.platform {
  background: var(--color-surface);
  padding-block: var(--space-section);
}

.platform__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-grid);
  align-items: center;
}

.platform__copy .section-title {
  margin: 0.75rem 0 1.25rem;
}

.platform__copy .section-desc {
  margin-bottom: 2rem;
}

.platform__visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
}

.platform__circle-mask {
  width: min(100%, 440px);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(160deg, #fef3c7 0%, #fde68a 40%, #f59e0b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
}

.platform__circle-mask svg {
  width: 75%;
  height: 75%;
}

/* Capabilities — layout: statement-band + capability-quad-grid */
.capabilities {
  background: var(--color-bg-alt);
  padding-block: var(--space-section);
}

.capabilities__statement {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3.5rem;
}

.capabilities__statement .capabilities__orb {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #c084fc 0%, #6366f1 40%, #38bdf8 100%);
  box-shadow: 0 8px 32px rgba(147, 51, 234, 0.25);
}

.capabilities__statement .section-title {
  margin-bottom: 1.25rem;
}

.capabilities__statement .section-desc {
  margin-inline: auto;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

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

.capability-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.capability-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

.capability-card__icon svg {
  width: 24px;
  height: 24px;
}

.capability-card h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.capability-card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Solutions — layout: solution-showcase-strip */
.solutions {
  background: var(--color-bg);
  color: var(--color-text-on-dark);
  padding-block: var(--space-section);
}

.solutions__header {
  text-align: center;
  margin-bottom: 3rem;
}

.solutions__header .section-title {
  color: var(--color-text-on-dark);
  margin-bottom: 0.75rem;
}

.solutions__header .section-desc {
  color: var(--color-text-muted-dark);
  margin-inline: auto;
}

.solution-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.solution-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.solution-card:hover {
  border-color: rgba(147, 51, 234, 0.4);
  transform: translateY(-3px);
}

.solution-card__visual {
  aspect-ratio: 4 / 3;
  background: linear-gradient(180deg, rgba(147, 51, 234, 0.12) 0%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.solution-card__visual svg {
  width: 80%;
  max-height: 120px;
}

.solution-card__body {
  padding: 1.5rem;
}

.solution-card__tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent-solar);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.solution-card h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.solution-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted-dark);
  margin-bottom: 1.25rem;
}

.solutions__cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* Technology — layout: tech-benefits-stats */
.technology {
  background: var(--color-surface);
  padding-block: var(--space-section);
}

.technology__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.technology__header .section-title {
  margin: 0.75rem 0 1rem;
}

.technology__header .section-desc {
  margin-inline: auto;
}

.tech-benefits {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 4rem;
}

.tech-benefit {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-base);
}

.tech-benefit:hover {
  border-color: var(--color-accent);
}

.tech-benefit__num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-accent);
}

.tech-benefit h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

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

.stats-band {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item__value {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-item__label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.stat-item__sub {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* CTA — layout: cta-band-dark */
.cta-section {
  background: linear-gradient(135deg, #0f0f0f 0%, #1a0a2e 50%, #0f0f0f 100%);
  color: var(--color-text-on-dark);
  padding-block: var(--space-section);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 100%, rgba(147, 51, 234, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section__inner {
  position: relative;
  z-index: 1;
}

.cta-section .section-title {
  color: var(--color-text-on-dark);
  max-width: 20ch;
  margin: 0 auto 1rem;
}

.cta-section .section-desc {
  color: var(--color-text-muted-dark);
  margin: 0 auto 2rem;
}

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

/* Footer — layout: footer-multi-column */
.site-footer {
  background: var(--color-bg);
  color: var(--color-text-muted-dark);
  padding-block: 4rem 2rem;
  border-top: 1px solid var(--color-border-dark);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.site-footer__brand img {
  height: 28px;
  margin-bottom: 1rem;
}

.site-footer__brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 28ch;
}

.site-footer__col h4 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-on-dark);
  margin-bottom: 1rem;
}

.site-footer__col a {
  display: block;
  font-size: 0.875rem;
  padding: 0.3rem 0;
  transition: color var(--transition-base);
}

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

.site-footer__email {
  color: var(--color-accent-solar) !important;
  font-weight: 500;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border-dark);
  font-size: 0.8125rem;
}

.site-footer__legal {
  display: flex;
  gap: 1.5rem;
}

.site-footer__legal a:hover {
  color: var(--color-text-on-dark);
}

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.modal__panel {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-modal);
  animation: modalIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

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

.modal__panel h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-right: 2rem;
}

.modal__panel p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.65;
}

.modal__panel ul {
  margin: 1rem 0;
  padding-left: 0;
}

.modal__panel li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.modal__panel li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-solar);
}

.modal__actions {
  margin-top: 1.5rem;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Policy pages */
.page-content {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: var(--space-section);
}

.page-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

.page-content h2 {
  font-family: var(--font-display);
  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;
  line-height: 1.7;
}

.page-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}