/* Design tokens */
:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --color-bg-light: #fbfbfd;
  --color-bg-dark: #1d1d1f;
  --color-bg-black: #000000;
  --color-text: #1d1d1f;
  --color-text-muted: #6e6e73;
  --color-text-inverse: #f5f5f7;
  --color-text-inverse-muted: #a1a1a6;
  --color-accent: #ff991c;
  --color-accent-hover: #e6860a;
  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-dark: rgba(255, 255, 255, 0.12);
  --max-width: 1080px;
  --header-height: 52px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 7rem;
  --radius: 12px;
  --radius-pill: 980px;
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
  --transition: 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
  --type-hero: clamp(2.25rem, 5vw, 3.5rem);
  --type-display: clamp(1.75rem, 3.5vw, 2.75rem);
  --type-title: clamp(1.25rem, 2vw, 1.5rem);
  --type-body: clamp(1rem, 1.1vw, 1.125rem);
  --type-eyebrow: 0.75rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--type-body);
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg-light);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 1000;
  padding: 0.5rem 1rem;
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: var(--space-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(251, 251, 253, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: block;
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-pill);
  transition: color var(--transition), background var(--transition);
}

.site-nav__link:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.04);
}

.site-nav__link.is-active {
  color: var(--color-text);
  font-weight: 500;
}

.remote-help {
  display: none;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #fff;
  background: #d70015;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.remote-help.is-visible {
  display: inline-flex;
}

.remote-help img {
  height: 20px;
  width: auto;
}

.remote-help:hover {
  color: #fff;
  filter: brightness(1.08);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav__panel {
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: rgba(251, 251, 253, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-lg) var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .site-nav__panel.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .site-nav__link {
    padding: 0.85rem 1rem;
    font-size: 1.125rem;
  }
}

/* Sections */
.section {
  padding: var(--space-2xl) var(--space-md);
}

.section--light {
  background: var(--color-bg-light);
  color: var(--color-text);
}

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

.section--black {
  background: var(--color-bg-black);
  color: var(--color-text-inverse);
}

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

.section__eyebrow {
  margin: 0 0 var(--space-xs);
  font-size: var(--type-eyebrow);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section--dark .section__eyebrow,
.section--black .section__eyebrow {
  color: var(--color-accent);
}

.section__title {
  margin: 0 0 var(--space-md);
  font-size: var(--type-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.section__lead {
  margin: 0 0 var(--space-lg);
  max-width: 42rem;
  font-size: var(--type-title);
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text-muted);
}

.section--dark .section__lead,
.section--black .section__lead {
  color: var(--color-text-inverse-muted);
}

/* Hero */
.hero {
  padding: var(--space-xl) var(--space-md) var(--space-2xl);
  text-align: center;
  background: var(--color-bg-light);
}

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

.hero__logo {
  margin: 0 auto var(--space-lg);
  max-width: min(100%, 720px);
}

.hero__eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: var(--type-eyebrow);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-size: var(--type-hero);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--color-text);
}

.hero__subtitle {
  margin: 0 auto var(--space-lg);
  max-width: 38rem;
  font-size: var(--type-title);
  font-weight: 400;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.35rem;
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform 0.15s ease;
}

.btn--primary {
  background: var(--color-accent);
  color: #1d1d1f;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: #1d1d1f;
}

.btn--secondary {
  background: transparent;
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent);
}

.btn--secondary:hover {
  background: rgba(255, 153, 28, 0.08);
  color: var(--color-accent-hover);
}

.section--dark .btn--secondary,
.section--black .btn--secondary {
  color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent);
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.section--dark .feature-card {
  background: rgba(255, 255, 255, 0.06);
  box-shadow: none;
  border: 1px solid var(--color-border-dark);
}

.feature-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.feature-card__caption {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

.section--dark .feature-card__caption {
  color: var(--color-text-inverse-muted);
}

/* Feature row (alternating) */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  margin-bottom: var(--space-2xl);
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row--reverse .feature-row__media {
  order: 2;
}

.feature-row--reverse .feature-row__content {
  order: 1;
}

@media (max-width: 768px) {
  .feature-row,
  .feature-row--reverse .feature-row__media,
  .feature-row--reverse .feature-row__content {
    grid-template-columns: 1fr;
    order: unset;
  }
}

.feature-row__media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

/* Services list */
.services-list {
  margin: var(--space-lg) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-md);
}

.services-list li {
  padding: var(--space-md);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid var(--color-border);
  font-size: var(--type-body);
  line-height: 1.5;
}

.section--dark .services-list li {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border-dark);
}

/* Value block */
.value-block {
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: rgba(255, 153, 28, 0.08);
  border: 1px solid rgba(255, 153, 28, 0.2);
}

.value-block__tagline {
  margin: 0 0 var(--space-sm);
  font-size: var(--type-title);
  font-weight: 600;
  letter-spacing: -0.01em;
}

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

.section--dark .value-block {
  background: rgba(255, 153, 28, 0.1);
  border-color: rgba(255, 153, 28, 0.25);
}

.section--dark .value-block p {
  color: var(--color-text-inverse-muted);
}

/* Skills accordion */
.skills-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.skills-accordion details {
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border-dark);
  overflow: hidden;
}

.skills-accordion summary {
  padding: var(--space-md) var(--space-md);
  font-size: var(--type-title);
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.skills-accordion summary::-webkit-details-marker {
  display: none;
}

.skills-accordion summary::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--color-text-inverse-muted);
  transition: transform var(--transition);
}

.skills-accordion details[open] summary::after {
  content: "−";
}

.skills-accordion__body {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--color-text-inverse-muted);
  line-height: 1.6;
}

.skills-accordion__body p {
  margin: 0 0 var(--space-sm);
}

.skills-accordion__body img {
  margin-top: var(--space-sm);
  border-radius: var(--radius);
}

.skills-img-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

@media (max-width: 600px) {
  .skills-img-grid {
    grid-template-columns: 1fr;
  }
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.contact-card {
  padding: var(--space-lg);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.03);
  border: 1px solid var(--color-border);
}

.section--dark .contact-card {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border-dark);
}

.contact-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.section--dark .contact-card h3 {
  color: var(--color-text-inverse-muted);
}

.contact-card a,
.contact-card p {
  margin: 0 0 var(--space-xs);
  font-size: var(--type-title);
  color: inherit;
}

.contact-card a:hover {
  color: var(--color-accent);
}

/* Form */
.contact-form label {
  display: block;
  margin-bottom: var(--space-xs);
  font-size: 0.875rem;
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-bottom: var(--space-md);
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  color: var(--color-text);
}

.section--dark .contact-form input,
.section--dark .contact-form textarea {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-border-dark);
  color: var(--color-text-inverse);
}

.contact-form .form-error {
  display: none;
  margin: -0.5rem 0 var(--space-sm);
  font-size: 0.8125rem;
  color: #d70015;
}

.contact-form .form-error.is-visible {
  display: block;
}

.contact-form input.is-invalid,
.contact-form textarea.is-invalid {
  border-color: #d70015;
}

/* FAQ */
.faq-list {
  margin-top: var(--space-lg);
}

.faq-list details {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.section--dark .faq-list details {
  border-color: var(--color-border-dark);
}

.faq-list summary {
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-sm) 0;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list__answer {
  margin: 0 0 var(--space-sm);
  padding-bottom: var(--space-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.section--dark .faq-list__answer {
  color: var(--color-text-inverse-muted);
}

/* Coming soon */
.coming-soon {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  color: var(--color-text-muted);
}

.section--dark .coming-soon {
  color: var(--color-text-inverse-muted);
}

.coming-soon__title {
  margin: 0;
  font-size: var(--type-display);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Footer */
.site-footer {
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg-dark);
  color: var(--color-text-inverse-muted);
  font-size: 0.8125rem;
}

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

.site-footer a {
  color: var(--color-text-inverse-muted);
}

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

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}