/* ==============================================
   PURETENSOR DESIGN SYSTEM v2.0
   ============================================== */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0D1117;
  --bg-secondary: #161B22;
  --bg-tertiary: #21262D;
  --bg-card: #161B22;
  --accent: #00D4AA;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --amber: #F0A500;
  --amber-hover: #FFB81C;
  --text: #E6EDF3;
  --text-heading: #FFFFFF;
  --text-muted: #8B949E;
  --border: #30363D;
  --border-hover: #484F58;

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1200px;
  --nav-h: 64px;
  --radius: 8px;
  --radius-lg: 12px;
  --section-pad: clamp(4rem, 8vw, 7rem);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg-primary);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--text-heading); }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; }
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: 1.2;
  font-weight: 600;
}
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -0.01em; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

/* --- Layout --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section {
  padding: var(--section-pad) 0;
}
.section--alt {
  background: var(--bg-secondary);
}
.section__label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section__title {
  margin-bottom: 1.5rem;
}
.section__intro {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--amber);
  color: var(--bg-primary);
}
.btn--primary:hover {
  background: var(--amber-hover);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(240, 165, 0, 0.25);
}
.btn--secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn--secondary:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.nav__logo:hover { color: var(--text-heading); }
.nav__logo-accent { color: var(--accent); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}
.nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav__link:hover { color: var(--text); }
.nav__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav__hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 0.5rem;
  line-height: 1;
  font-size: 1.5rem;
}

/* --- Geo Toggle --- */
.geo-toggle {
  display: inline-flex;
  background: var(--bg-tertiary);
  border-radius: 20px;
  padding: 2px;
  border: 1px solid var(--border);
}
.geo-toggle__btn {
  background: none;
  border: none;
  padding: 5px 12px;
  border-radius: 18px;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: background 0.2s;
  color: var(--text-muted);
}
.geo-toggle__btn--active {
  background: var(--bg-secondary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* --- Hero --- */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140%;
  height: 70%;
  background: radial-gradient(ellipse, rgba(0, 212, 170, 0.07) 0%, transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(48, 54, 61, 0.25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(48, 54, 61, 0.25) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 20%, transparent 70%);
  pointer-events: none;
  opacity: 0.4;
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}
.hero__title {
  margin-bottom: 1.5rem;
  font-weight: 700;
}
.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 2.5rem;
}
.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* --- Problem Section --- */
.problem__text {
  max-width: 780px;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
}

/* --- Metrics Strip --- */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 3rem;
}
.metric {
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
}
.metric + .metric::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border);
}
.metric__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.metric__unit {
  font-size: 0.6em;
  color: var(--text-muted);
  font-weight: 400;
}
.metric__label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  line-height: 1.4;
}

/* --- Service Cards --- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.3s, transform 0.3s;
}
.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.service-card__icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
}
.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 0.75rem;
}
.service-card__desc {
  color: var(--text);
  line-height: 1.7;
  font-size: 0.9375rem;
  margin-bottom: 1.25rem;
}
.service-card__ideal {
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.service-card__ideal-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.375rem;
}
.service-card__ideal-text {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Infrastructure --- */
.infra__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
  align-items: start;
}
.infra__topology {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.infra__topology svg {
  width: 100%;
  height: auto;
}
.infra__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.spec-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.spec-card__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.spec-card__list {
  list-style: none;
}
.spec-card__item {
  font-size: 0.8125rem;
  color: var(--text);
  padding: 0.375rem 0;
  border-bottom: 1px solid rgba(48, 54, 61, 0.5);
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}
.spec-card__item:last-child { border-bottom: none; }
.spec-card__item-label { color: var(--text-muted); }
.spec-card__item-value {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text-heading);
  text-align: right;
}
.infra__note {
  margin-top: 2rem;
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 780px;
}

/* --- Pricing Cards --- */
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
  align-items: start;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
}
.pricing-card--featured {
  border-color: var(--accent);
  position: relative;
  box-shadow: 0 0 30px rgba(0, 212, 170, 0.08);
}
.pricing-card--featured::before {
  content: 'Recommended';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--bg-primary);
  padding: 4px 16px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.pricing-card__tier {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
}
.pricing-card__price {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.pricing-card__period {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.pricing-card__tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  margin: 1.25rem 0;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}
.pricing-card__features {
  list-style: none;
  margin: 0 0 2rem;
  flex: 1;
}
.pricing-card__feature {
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.9375rem;
  color: var(--text);
}
.pricing-card__feature::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8125rem;
}
.pricing__note {
  margin-top: 2.5rem;
  text-align: center;
  font-size: 1rem;
  color: var(--text-muted);
}

/* --- Healthcare --- */
.healthcare {
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.04) 0%, var(--bg-primary) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.healthcare__content {
  max-width: 780px;
}
.healthcare__text {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
}

/* --- Labs --- */
.labs__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.lab-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color 0.3s;
}
.lab-card:hover { border-color: var(--border-hover); }
.lab-card__name {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.lab-card__title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--text-heading);
  margin-bottom: 0.75rem;
}
.lab-card__desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- About --- */
.about__content {
  max-width: 780px;
}
.about__text {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 1.5rem;
}
.about__team {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.about__team-member {
  display: flex;
  gap: 2rem;
  align-items: start;
}
.about__team-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}
.about__team-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--text-heading);
  margin-bottom: 0.25rem;
}
.about__team-role {
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.about__team-bio {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.about__nvidia {
  margin-top: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.about__nvidia img {
  height: 36px;
  width: auto;
}
.about__nvidia span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- Contact --- */
.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 2rem;
}
.contact__info {
  padding-top: 1rem;
}
.contact__detail {
  display: flex;
  align-items: start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.contact__detail-icon {
  color: var(--accent);
  font-size: 1.125rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
}
.contact__detail-text {
  font-size: 0.9375rem;
  color: var(--text);
}
.contact__detail-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.form__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}
.form__input,
.form__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}
.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.form__textarea {
  resize: vertical;
  min-height: 120px;
}

/* --- Footer --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer__brand {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--text-heading);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.footer__tagline {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
}
.footer__entity {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.footer__nav {
  display: flex;
  gap: 3rem;
}
.footer__nav-col {
  list-style: none;
}
.footer__nav-link {
  display: block;
  color: var(--text-muted);
  font-size: 0.8125rem;
  padding: 0.25rem 0;
  transition: color 0.2s;
}
.footer__nav-link:hover { color: var(--text); }
.footer__bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer__copy {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Responsive: 1024px --- */
@media (max-width: 1024px) {
  .infra__layout {
    grid-template-columns: 1fr;
  }
  .infra__specs {
    grid-template-columns: 1fr 1fr;
  }
  .pricing__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }
  .contact__layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* --- Responsive: 768px --- */
@media (max-width: 768px) {
  :root {
    --nav-h: 56px;
  }
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    background: var(--bg-primary);
    padding: 2rem 1.5rem;
    gap: 0;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    border-top: 1px solid var(--border);
    overflow-y: auto;
  }
  .nav__links--open {
    transform: translateX(0);
  }
  .nav__link {
    font-size: 1.125rem;
    display: block;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border);
  }
  .nav__hamburger {
    display: block;
  }
  .services__grid {
    grid-template-columns: 1fr;
  }
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric + .metric:nth-child(3)::before {
    display: none;
  }
  .metric:nth-child(n+3) {
    border-top: 1px solid var(--border);
  }
  .infra__specs {
    grid-template-columns: 1fr;
  }
  .labs__grid {
    grid-template-columns: 1fr;
  }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn { text-align: center; }
  .form__row {
    grid-template-columns: 1fr;
  }
  .footer__inner {
    flex-direction: column;
  }
  .footer__nav {
    gap: 2rem;
    flex-wrap: wrap;
  }
  .footer__bottom {
    flex-direction: column;
    align-items: start;
  }
  .about__team-member {
    flex-direction: column;
    gap: 1rem;
  }
}

/* --- Responsive: 480px --- */
@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .metrics {
    grid-template-columns: 1fr 1fr;
  }
  .metric { padding: 1.25rem 1rem; }
  .pricing-card { padding: 2rem 1.5rem; }
}

/* --- Skip link (accessibility) --- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: 0 0 var(--radius) var(--radius);
}
.skip-link:focus {
  left: 50%;
  transform: translateX(-50%);
}

/* --- Policy pages --- */
.policy {
  padding-top: calc(var(--nav-h) + 3rem);
  padding-bottom: 4rem;
}
.policy__content {
  max-width: 780px;
  margin: 0 auto;
}
.policy__content h1 {
  margin-bottom: 2rem;
}
.policy__content h2 {
  font-size: 1.5rem;
  margin: 2.5rem 0 1rem;
}
.policy__content h3 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
}
.policy__content p {
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 1rem;
}
.policy__content ul,
.policy__content ol {
  margin: 0.5rem 0 1.5rem 1.5rem;
  color: var(--text);
}
.policy__content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}
.policy__content a {
  color: var(--accent);
}
.policy__content a:hover {
  text-decoration: underline;
}
.policy__meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}