/*
 * Design Brief: Synterra ← inspired by https://syntera.ai/
 *
 * Structure: hero-centered-glow → statement-band → feature-grid-2x2 →
 *            staggered-capabilities → horizontal-solutions → tech-split-panel →
 *            cta-band-glow → footer-multi-column
 *
 * Hero: centered typography, welcome pill badge, teal radial glow, product mock below
 * Tokens derived from reference: near-black green bg (#000705), teal accent (#00d2be),
 * white headlines, muted sage body text, gradient CTAs (teal → indigo)
 */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

:root {
  --color-bg: #000705;
  --color-bg-alt: #0a1210;
  --color-surface: #111916;
  --color-surface-elevated: #182220;
  --color-text: #fffffe;
  --color-text-muted: #9aada8;
  --color-accent: #00d2be;
  --color-accent-hover: #00eed6;
  --color-accent-secondary: #5b6cff;
  --color-accent-glow: rgba(0, 210, 190, 0.35);
  --color-border: rgba(0, 210, 190, 0.18);
  --color-border-subtle: rgba(255, 255, 255, 0.08);

  --font-display: 'DM Sans', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --space-section: clamp(4rem, 8vw, 7rem);
  --space-grid: clamp(1.5rem, 3vw, 2.5rem);
  --container-max: 1200px;
  --container-narrow: 900px;

  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-reveal: 0.7s cubic-bezier(0.22, 1, 0.36, 1);

  --shadow-glow: 0 0 80px var(--color-accent-glow);
  --gradient-cta: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(0, 210, 190, 0.22) 0%, transparent 70%);
}

*, *::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-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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);
}

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

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

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

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  transition: transform var(--transition-base), box-shadow var(--transition-base), opacity var(--transition-base);
  white-space: nowrap;
}

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

.btn--primary {
  background: var(--gradient-cta);
  color: var(--color-text);
  box-shadow: 0 4px 24px rgba(0, 210, 190, 0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 210, 190, 0.35);
}

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

.btn--secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--ghost {
  background: rgba(0, 210, 190, 0.08);
  color: var(--color-accent);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  background: rgba(0, 210, 190, 0.15);
}

.btn--lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

/* ── Section utilities ── */
.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-muted);
  max-width: 62ch;
  margin-top: 1.25rem;
}

.section-header {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-header--center {
  text-align: center;
}

.section-header--center .section-subtitle {
  margin-inline: auto;
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background var(--transition-base), border-color var(--transition-base), backdrop-filter var(--transition-base);
}

.site-header.is-scrolled {
  background: rgba(0, 7, 5, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

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

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

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

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

.site-header__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.site-header__links a {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

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

.site-header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  color: var(--color-text);
}

.site-header__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Hero (centered-glow) ── */
.hero {
  position: relative;
  padding-top: calc(var(--space-section) + 4rem);
  padding-bottom: var(--space-section);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  pointer-events: none;
}

.hero__sparkle {
  position: absolute;
  width: 24px;
  height: 24px;
  opacity: 0.6;
  pointer-events: none;
}

.hero__sparkle--left {
  top: 38%;
  left: 12%;
}

.hero__sparkle--right {
  top: 42%;
  right: 12%;
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1.1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  background: rgba(0, 210, 190, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  margin-bottom: 1.75rem;
}

.hero__title {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 52ch;
  margin-bottom: 2.5rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.hero__mock {
  width: min(960px, 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
  overflow: hidden;
  box-shadow: var(--shadow-glow), 0 24px 64px rgba(0, 0, 0, 0.5);
}

.hero__mock-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero__mock-dots {
  display: flex;
  gap: 6px;
}

.hero__mock-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border-subtle);
}

.hero__mock-dots span:first-child { background: #ff5f57; }
.hero__mock-dots span:nth-child(2) { background: #febc2e; }
.hero__mock-dots span:nth-child(3) { background: #28c840; }

.hero__mock-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: monospace;
}

.hero__mock-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 280px;
}

.hero__mock-sidebar {
  padding: 1.25rem;
  border-right: 1px solid var(--color-border-subtle);
  background: rgba(0, 0, 0, 0.3);
}

.hero__mock-sidebar p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.hero__mock-sidebar ul {
  list-style: none;
}

.hero__mock-sidebar li {
  font-size: 0.8rem;
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.hero__mock-sidebar li.is-active {
  background: rgba(0, 210, 190, 0.12);
  color: var(--color-accent);
}

.hero__mock-main {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero__mock-code {
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid var(--color-border-subtle);
}

.hero__mock-code .kw { color: var(--color-accent); }
.hero__mock-code .fn { color: #8b9dff; }
.hero__mock-code .str { color: #7dd3a8; }

/* ── Platform Overview (statement-band) ── */
.platform {
  padding-block: var(--space-section);
  background: var(--color-bg-alt);
  border-block: 1px solid var(--color-border-subtle);
}

.platform__inner {
  text-align: center;
}

.platform__badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.platform__title {
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  max-width: 22ch;
  margin-inline: auto;
  margin-bottom: 1.25rem;
}

.platform__desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

.platform__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(2rem, 5vw, 4rem);
  padding-top: 1rem;
}

.platform__stat {
  text-align: center;
}

.platform__stat-value {
  display: block;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.platform__stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

/* ── Capabilities (feature-grid-2x2) ── */
.capabilities {
  padding-block: var(--space-section);
}

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

.capability-card {
  position: relative;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.capability-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 210, 190, 0.08);
}

.capability-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 210, 190, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

.capability-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.capability-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.capability-card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.capability-card__link:hover {
  gap: 0.55rem;
}

/* ── Solutions (horizontal-blocks) ── */
.solutions {
  padding-block: var(--space-section);
  background: var(--color-bg-alt);
}

.solutions__list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.solution-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding: clamp(1.5rem, 3vw, 2rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.solution-row:hover {
  border-color: var(--color-border);
  background: var(--color-surface-elevated);
}

.solution-row__num {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  color: rgba(0, 210, 190, 0.25);
  line-height: 1;
  min-width: 3rem;
}

.solution-row__content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.solution-row__content p {
  font-size: 0.925rem;
  color: var(--color-text-muted);
}

/* ── Technology (split-panel) ── */
.technology {
  padding-block: var(--space-section);
}

.technology__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: center;
}

.technology__visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 480px;
  margin-inline: auto;
}

.technology__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

.technology__ring--outer {
  animation: ring-pulse 4s ease-in-out infinite;
}

.technology__ring--mid {
  inset: 12%;
  border-color: rgba(0, 210, 190, 0.3);
}

.technology__ring--inner {
  inset: 28%;
  background: radial-gradient(circle, rgba(0, 210, 190, 0.15) 0%, transparent 70%);
  border: none;
}

.technology__core {
  position: absolute;
  inset: 38%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.technology__nodes {
  position: absolute;
  inset: 0;
}

.technology__node {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-accent-glow);
}

.technology__node:nth-child(1) { top: 5%; left: 50%; transform: translateX(-50%); }
.technology__node:nth-child(2) { top: 50%; right: 5%; transform: translateY(-50%); }
.technology__node:nth-child(3) { bottom: 5%; left: 50%; transform: translateX(-50%); }
.technology__node:nth-child(4) { top: 50%; left: 5%; transform: translateY(-50%); }

.technology__features {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.tech-feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.tech-feature__marker {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-top: 0.5rem;
  background: var(--color-accent);
  border-radius: 50%;
}

.tech-feature h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.tech-feature p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ── CTA Band ── */
.cta-band {
  position: relative;
  padding-block: var(--space-section);
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 50% 50%, rgba(0, 210, 190, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.cta-band__inner {
  position: relative;
  text-align: center;
  padding: clamp(3rem, 6vw, 5rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.cta-band__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.cta-band__desc {
  color: var(--color-text-muted);
  max-width: 50ch;
  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: var(--color-bg-alt);
  border-top: 1px solid var(--color-border-subtle);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  margin-bottom: 3rem;
}

.site-footer__brand p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  margin-top: 1rem;
  max-width: 36ch;
}

.site-footer__heading {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.site-footer__links a {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  transition: color var(--transition-base);
}

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

.site-footer__email {
  color: var(--color-accent);
  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-subtle);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ── 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, 7, 5, 0.85);
  backdrop-filter: blur(4px);
}

.modal__panel {
  position: relative;
  width: min(520px, 100%);
  max-height: 85vh;
  overflow-y: auto;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
}

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

.modal__close:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

.modal__panel h2 {
  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 1.5rem 1.25rem;
  color: var(--color-text-muted);
}

.modal__panel li {
  margin-bottom: 0.5rem;
}

.modal__panel .btn {
  margin-top: 0.5rem;
}

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

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

.policy-page .policy-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}

.policy-page h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.policy-page p,
.policy-page li {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.policy-page ul {
  margin-left: 1.25rem;
  margin-bottom: 1rem;
}

@keyframes ring-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.03); opacity: 0.7; }
}