:root {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-surface-alt: #ededed;
  --color-card: #fdfdfd;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-primary: #111111;
  --color-primary-dark: #000000;
  --color-accent: #333333;
  --color-text: #0a0a0a;
  --color-text-muted: rgba(10, 10, 10, 0.72);
  --color-text-dim: rgba(10, 10, 10, 0.55);
  --color-nav-bg: rgba(255, 255, 255, 0.88);
  --shadow-soft: 0 18px 60px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 24px 60px rgba(0, 0, 0, 0.12);
  --max-width: 1140px;
  --max-width-wide: 1200px;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --radius-xs: 10px;
  --transition-base: 200ms ease;
  --transition-slow: 320ms ease;
  color-scheme: dark;
}

.hero--simple {
  padding: 4.5rem 0 3.5rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.hero__inner--simple {
  display: flex;
  justify-content: center;
  text-align: center;
}

.hero__inner--simple .hero__copy {
  max-width: 620px;
}

.hero__inner--simple .lead {
  margin-bottom: 0;
}

.legal {
  padding: 3.5rem 0 0;
}

.legal__content {
  display: grid;
  gap: 1.6rem;
  color: var(--color-text-muted);
}

.legal__content h2 {
  margin: 1.5rem 0 0.25rem;
  color: var(--color-text);
}

.legal__content a {
  color: var(--color-text);
  text-decoration: underline;
}

@media (max-width: 768px) {
  .hero--simple {
    padding: 4rem 0 3rem;
  }

  .legal {
    padding-top: 3rem;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

.container {
  width: min(90vw, var(--max-width));
  margin-inline: auto;
}

.top-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background-color: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border);
}

.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  color: inherit;
  text-decoration: none;
}

.brand:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

.brand__mark {
  width: clamp(56px, 7vw, 86px);
  height: auto;
  object-fit: contain;
}

.brand__text {
  line-height: 1;
}

.brand--footer {
  font-size: 0.96rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.brand--footer .brand__mark {
  width: clamp(48px, 6vw, 72px);
}

.nav {
  position: relative;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 1.5vw, 1.6rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: clamp(0.9rem, 1vw, 0.98rem);
  transition: color var(--transition-base);
}

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

.nav__cta-item {
  display: none;
}

.nav__cta-button {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 0.3rem;
  background: none;
  border: none;
  padding: 0.35rem;
  border-radius: 0.5rem;
  cursor: pointer;
}

.nav__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav__toggle-line {
  width: 22px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1rem;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__toggle.is-active .nav__toggle-line:nth-of-type(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-active .nav__toggle-line:nth-of-type(2) {
  opacity: 0;
}

.nav__toggle.is-active .nav__toggle-line:nth-of-type(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform var(--transition-base), background-color var(--transition-base), color var(--transition-base);
}

.button--primary {
  background: linear-gradient(120deg, var(--color-primary) 0%, #2f2f2f 100%);
  color: #fff;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.14);
}

.button--primary:hover,
.button--primary:focus-visible {
  transform: translateY(-2px);
  background: linear-gradient(120deg, #252525 0%, var(--color-primary-dark) 100%);
}

.get-alert-btn--desktop {
  display: inline-flex;
}

.button--ghost {
  border: 1px solid rgba(0, 0, 0, 0.18);
  color: var(--color-text);
  background: transparent;
}

.button--ghost:hover,
.button--ghost:focus-visible {
  color: var(--color-text);
  border-color: rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}

.hero {
  padding: 7rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(245, 245, 245, 1) 100%);
  z-index: 0;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4rem;
  align-items: center;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.4rem, 3.8vw, 3rem);
  line-height: 1.15;
}

.hero .lead {
  font-size: 1.05rem;
  max-width: 32rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.6rem, 3.8vw, 3.6rem);
  margin: 0 0 1rem;
  line-height: 1.1;
}

.lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 32rem;
}

.hero__cta {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__panel {
  background: #ffffff;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
}

.hero__card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.metric-card {
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.metric-card__label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.metric-card__value {
  margin: 1rem 0 0.4rem;
  font-size: 2.2rem;
  font-weight: 700;
}

.metric-card__meta {
  margin: 0;
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.hero__note {
  margin-top: 1.5rem;
  padding: 1.2rem 1.4rem;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.12);
  color: var(--color-text-muted);
}

.about-openai__media {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.about-openai__logo {
  width: 140px;
  height: 140px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
}

.about-openai__logo img {
  width: 100%;
  height: auto;
}

.text-content {
  display: grid;
  gap: 1.5rem;
  color: var(--color-text-muted);
}

.bullet-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.6rem;
  color: var(--color-text-muted);
}

.bullet-list li {
  line-height: 1.5;
}

.split-section {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem;
}

.split-section__column {
  display: grid;
  gap: 1.2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  color: var(--color-text-muted);
}

.split-section__column h3 {
  color: var(--color-text);
  margin: 0;
}

.section__actions {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
}

.timeline {
  display: grid;
  gap: 1.6rem;
}

.timeline__item {
  display: grid;
  gap: 0.7rem;
  padding: 1.45rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}

.timeline__date {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.timeline__content h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--color-text);
}

.timeline__content p {
  margin: 0.35rem 0 0;
  color: var(--color-text-muted);
}

.section {
  padding: 5.5rem 0;
  background: var(--color-bg);
}

.section--alt {
  background: var(--color-surface-alt);
}

.section__header {
  max-width: 42rem;
  margin-bottom: 3rem;
}

.section__header h2 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin: 0 0 1rem;
}

.section__header p {
  color: var(--color-text-muted);
  margin: 0;
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 1.8rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 0, 0, 0.18);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.info-card {
  padding: 1.6rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.process {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

.process__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.process__steps li {
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  counter-increment: steps;
  position: relative;
  padding-left: 4.5rem;
}

.process__steps li::before {
  content: counter(steps);
  position: absolute;
  top: 1.6rem;
  left: 1.6rem;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
  display: grid;
  place-items: center;
  font-weight: 600;
  color: var(--color-text);
}

.process__steps--alt li {
  padding-left: 1.6rem;
}

.process__steps--alt li::before {
  display: none;
}

.alerts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

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

.alert-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 0, 0, 0.18);
}

.alert-card__date {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.watchlist {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.watchlist__card {
  padding: 2rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.watchlist__card header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.08);
  color: var(--color-text);
}

.badge--accent {
  background: rgba(0, 0, 0, 0.12);
  color: var(--color-text);
}

dl {
  margin: 0;
  display: grid;
  gap: 1rem;
}

dl div {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

dl dt {
  font-weight: 500;
}

.faq {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 3rem;
}

.faq__tip {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  background: rgba(0, 0, 0, 0.04);
  border-left: 3px solid rgba(0, 0, 0, 0.18);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

.faq__list {
  display: grid;
  gap: 1.5rem;
}

.faq__item {
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--color-card);
  border: 1px solid var(--color-border);
}

.form {
  display: grid;
  gap: 1.3rem;
  background: var(--color-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1.9rem;
}

.form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.3rem;
}

.input-group {
  display: grid;
  gap: 0.55rem;
}

.input-group label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: #fff;
  color: var(--color-text);
  font-size: 0.92rem;
}

.input-group input::placeholder {
  color: var(--color-text-dim);
}

.input-group select option {
  color: #000;
}

.form__disclaimer {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-text-dim);
}

.form__status {
  min-height: 1rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.form__status.is-success {
  color: #166534;
}

.form__status.is-error {
  color: #b91c1c;
}

.form .button {
  padding: 0.6rem 1.3rem;
  font-size: 0.92rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.modal__dialog {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: clamp(1.6rem, 4vw, 2.2rem);
  max-width: 400px;
  width: min(100%, 400px);
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1.2rem;
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.8rem;
  cursor: pointer;
}

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

.modal__content {
  display: grid;
  gap: 0.95rem;
}

.modal__description {
  margin: 0;
  color: var(--color-text-muted);
}

body.modal-open,
body.nav-open {
  overflow: hidden;
}

.cta {
  padding: 5rem 0;
  background: radial-gradient(circle at 30% -50%, rgba(0, 0, 0, 0.04), transparent 55%),
    radial-gradient(circle at 70% -20%, rgba(0, 0, 0, 0.05), transparent 45%),
    var(--color-surface);
  text-align: center;
}

.cta__inner {
  max-width: 42rem;
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
}

.cta h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.6rem);
}

.cta p {
  margin: 0;
  color: var(--color-text-muted);
}

.footer {
  background: #f0f0f0;
  border-top: 1px solid var(--color-border);
  padding-top: 3.5rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer__note {
  margin: 1rem 0 0;
  color: var(--color-text-muted);
  max-width: 22rem;
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}

.footer__links h4 {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer__links ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.6rem;
}

.footer__links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.93rem;
}

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

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0 2.5rem;
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.footer__legal-links {
  display: flex;
  gap: 1.2rem;
}

.footer__legal-links a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.sr-only {
  border: 0;
  clip: rect(0, 0, 0, 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

@media (max-width: 992px) {
  .hero__inner,
  .process,
  .faq,
  .footer__inner {
    grid-template-columns: 1fr;
  }

  .hero__inner {
    gap: 2.75rem;
  }

  .hero__copy {
    order: 1;
    text-align: center;
  }

  .hero__panel {
    order: 2;
    max-width: 480px;
    margin: 0 auto;
  }

  .hero__cta {
    justify-content: center;
    gap: 0.75rem;
  }

  .split-section {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .card-grid,
  .alerts-grid,
  .watchlist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .top-bar__inner {
    padding: 0.85rem 0;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    width: min(80vw, 280px);
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.97);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--transition-base), transform var(--transition-base);
    visibility: hidden;
    max-height: min(70vh, 480px);
    overflow-y: auto;
  }

  .nav__links.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    visibility: visible;
  }

  .nav__links li {
    width: 100%;
  }

  .nav__links li + li {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
  }

  .nav__links a {
    display: block;
    width: 100%;
    padding: 0.5rem 0.35rem;
    white-space: normal;
  }

  .nav__cta-item {
    display: block;
    padding-top: 0.75rem;
  }

  .nav__cta-item .button {
    width: 100%;
  }

  .get-alert-btn--desktop {
    display: none;
  }

  .feature-grid,
  .card-grid,
  .alerts-grid,
  .watchlist {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 6rem;
  }

  .hero__cta {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .hero__card-grid {
    grid-template-columns: 1fr;
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .modal__dialog {
    padding: 2rem;
  }

  .footer__links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .container {
    width: min(92vw, var(--max-width));
  }

  .button {
    width: 100%;
  }

  .hero__cta {
    flex-direction: column;
    align-items: stretch;
  }

  .footer__bottom-inner {
    justify-content: center;
  }
}