/* Design tokens */
:root {
  --color-bg: #0c0f14;
  --color-surface: #141a24;
  --color-surface-elevated: #1c2433;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #e8ecf4;
  --color-text-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-accent-soft: rgba(56, 189, 248, 0.15);
  --color-accent-text: #0c4a6e;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "DM Sans", system-ui, -apple-system, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-soft: 0 24px 48px rgba(0, 0, 0, 0.35);
  --header-h: 4rem;
  --space-section: clamp(3.5rem, 8vw, 6rem);
  --max-content: 72rem;
  --focus-ring: 0 0 0 3px var(--color-bg), 0 0 0 5px var(--color-accent);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

#intro,
#apps,
#testimonials,
#contact {
  scroll-margin-top: calc(var(--header-h) + 0.75rem);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(56, 189, 248, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(99, 102, 241, 0.06), transparent);
  min-height: 100vh;
}

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

a {
  color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1rem;
  background: var(--color-accent);
  color: var(--color-accent-text);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--color-border);
  background: rgba(12, 15, 20, 0.85);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  border-radius: 1px;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

@media (max-width: 52rem) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    max-height: 0;
    overflow: hidden;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    transition: max-height 0.25s ease;
  }

  .site-nav.is-open {
    max-height: 16rem;
  }

  .site-nav__list {
    flex-direction: column;
    padding: 1rem clamp(1.25rem, 4vw, 2rem) 1.25rem;
    gap: 0;
  }

  .site-nav a {
    padding: 0.75rem 0;
    width: 100%;
  }
}

/* Sections */
.section {
  padding: var(--space-section) clamp(1.25rem, 4vw, 2rem);
}

.section--hero {
  padding-top: clamp(2.5rem, 6vw, 4rem);
  padding-bottom: var(--space-section);
}

.section--alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section__inner {
  max-width: var(--max-content);
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: 36rem;
}

.section__header {
  margin-bottom: clamp(2rem, 5vw, 3rem);
  max-width: 40rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.section__subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.section__subtitle code {
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  background: var(--color-surface-elevated);
  color: var(--color-accent);
}

/* Hero */
.hero {
  max-width: 40rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__headshot {
  --headshot-size: clamp(7.5rem, 32vw, 11rem);
  width: var(--headshot-size);
  height: var(--headshot-size);
  object-fit: cover;
  object-position: center top;
  margin: 0 0 1.5rem;
  border-radius: 50%;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.hero__eyebrow,
.hero__title,
.hero__lede,
.hero__actions {
  width: 100%;
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
}

.hero__accent {
  color: var(--color-accent);
}

.hero__lede {
  margin: 0 auto 2rem;
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 36ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.625rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.button--primary {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

.button--primary:hover {
  filter: brightness(1.08);
}

.button--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.button--ghost:hover {
  background: var(--color-surface-elevated);
  border-color: var(--color-text-muted);
}

/* App grid */
.app-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2rem);
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .app-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 64rem) {
  .app-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.app-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.section--alt .app-card {
  background: var(--color-bg);
}

.app-card__media {
  aspect-ratio: 16 / 9;
  background: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
}

.app-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card__body {
  padding: 1.35rem 1.35rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
}

.app-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0;
  font-weight: 700;
}

.app-card__pitch {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  flex: 1;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag-list li {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.app-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.link-pill {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-accent-text);
}

.link-pill:hover {
  filter: brightness(1.08);
}

.link-pill--muted {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.link-pill--muted:hover {
  border-color: var(--color-text-muted);
}

/* Testimonials */
.testimonial-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1.25rem, 3vw, 1.5rem);
  grid-template-columns: 1fr;
}

@media (min-width: 48rem) {
  .testimonial-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.testimonial-card__quote {
  margin: 0;
}

.testimonial-card__quote p {
  margin: 0;
  font-size: 1rem;
  font-style: italic;
  color: var(--color-text);
}

.testimonial-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: auto;
}

.testimonial-card__name {
  font-style: normal;
  font-weight: 700;
  font-size: 0.9375rem;
}

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

/* Contact */
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem;
  min-height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.contact-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-elevated);
}

.contact-card__label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.contact-card__value {
  font-weight: 600;
  color: var(--color-accent);
  word-break: break-word;
}

/* Footer */
.site-footer {
  padding: 2rem clamp(1.25rem, 4vw, 2rem);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer__copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer__top {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
}

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