/* Minimalist BEM, mobile-first */

:root {
  --bg: #0b0c10;
  --surface: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --accent: #7c5cff;

  --radius: 14px;
  --radius-sm: 10px;

  /* Updated at runtime to match sticky header height */
  --scroll-offset: 90px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  --container: 1100px;

  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: var(--scroll-offset, 90px);
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 20% 10%, rgba(124, 92, 255, 0.22), transparent 60%),
    radial-gradient(900px 600px at 80% 0%, rgba(255, 255, 255, 0.06), transparent 55%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

[hidden] {
  display: none !important;
}

body.is-locked {
  overflow: hidden;
}

body.is-locked .site-header {
  opacity: 0;
  pointer-events: none;
}

/* Reveal animations */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px) scale(0.99);
  filter: blur(6px);
  transition:
    opacity 700ms var(--ease-out),
    transform 700ms var(--ease-out),
    filter 700ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform, filter;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

strong {
  color: var(--text);
}

.container {
  width: min(var(--container), calc(100% - 2 * var(--space-5)));
  margin-inline: auto;
}

.page__main {
  padding-bottom: var(--space-8);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11, 12, 16, 0.65);
  border-bottom: 1px solid var(--border);
}

.site-header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.site-header__actions {
  display: none;
}

.site-header__toggle {
  display: inline-flex;
}

.menu-toggle {
  height: 40px;
  width: 44px;
  padding: 0;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.menu-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.menu-toggle__line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.82);
  transition: transform 160ms ease, opacity 160ms ease, width 160ms ease;
  transform-origin: center;
}

.menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.menu-toggle[aria-expanded="true"] .menu-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand__name {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand__role {
  font-size: 13px;
  color: var(--muted);
}

.site-nav {
  display: none;
  gap: var(--space-4);
}

.site-nav__link {
  font-size: 14px;
  color: var(--muted);
  padding: var(--space-2) var(--space-2);
  border-radius: var(--radius-sm);
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.site-nav__link:hover {
  color: var(--text);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
}

.site-nav__link--active {
  color: var(--text);
  background: rgba(124, 92, 255, 0.14);
  border: 1px solid rgba(124, 92, 255, 0.28);
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--border);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    transform 160ms ease,
    box-shadow 220ms var(--ease-out);
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

.button--primary {
  background: var(--accent);
  border-color: rgba(124, 92, 255, 0.55);
  color: #000;
  box-shadow: 0 14px 40px rgba(124, 92, 255, 0.18);
}

.button--primary:hover {
  background: color-mix(in oklab, var(--accent), white 8%);
}

.button--ghost {
  background: rgba(255, 255, 255, 0.04);
}

.button--ghost:hover {
  background: rgba(255, 255, 255, 0.07);
}

/* Sections */
.section-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.stack__title {
  margin-bottom: var(--space-5);
}

.section-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.section-head__subtitle {
  margin: 0;
  color: var(--muted);
}

.hero {
  padding: var(--space-8) 0 var(--space-7);
}

.hero__grid {
  display: grid;
  gap: var(--space-6);
}

.hero__eyebrow {
  margin: 0 0 var(--space-3);
  color: var(--muted);
}

.hero__title {
  margin: 0 0 var(--space-4);
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero__subtitle {
  margin: 0 0 var(--space-5);
  color: var(--muted);
  max-width: 70ch;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.hero__meta {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.hero__visual {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.hero__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.pill {
  display: grid;
  gap: 2px;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}

.pill__label {
  font-size: 12px;
  color: var(--muted);
}

.pill__value {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.stack,
.portfolio,
.services,
.process,
.faq,
.calc,
.contact {
  padding: var(--space-7) 0;
  scroll-margin-top: var(--scroll-offset, 90px);
}

/* FAQ */
.faq__list {
  display: grid;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
}

.faq-item__summary {
  cursor: pointer;
  padding: var(--space-4) var(--space-5);
  font-weight: 700;
  letter-spacing: -0.01em;
  list-style: none;
}

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

.faq-item__summary::after {
  content: "+";
  float: right;
  color: rgba(255, 255, 255, 0.72);
}

.faq-item[open] .faq-item__summary::after {
  content: "–";
}

.faq-item__content {
  padding: 0 var(--space-5) var(--space-5);
}

.faq-item__text {
  margin: 0;
  color: var(--muted);
  max-width: 80ch;
}

/* Calculator */
.calc-card {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 2px);
  background: rgba(255, 255, 255, 0.03);
  padding: var(--space-6);
}

.calc__grid {
  display: grid;
  gap: var(--space-5);
}

.calc-field {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: rgba(255, 255, 255, 0.02);
}

.calc-field__legend {
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.calc-option,
.calc-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  color: rgba(255, 255, 255, 0.86);
}

.calc-option__input,
.calc-check__input {
  margin-top: 3px;
  accent-color: var(--accent);
}

.calc-option__text,
.calc-check__text {
  color: rgba(255, 255, 255, 0.84);
}

.calc-result {
  margin-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-5);
  display: grid;
  gap: var(--space-4);
}

.calc-result__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.calc-result__label {
  color: var(--muted);
}

.calc-result__value {
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: 22px;
}

.calc-result__note {
  color: rgba(255, 255, 255, 0.68);
}

.calc-result__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

@media (min-width: 900px) {
  .calc__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.stack__grid,
.services__grid,
.portfolio__grid {
  display: grid;
  gap: var(--space-4);
}

.stack-card,
.service-card,
.case-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  padding: var(--space-5);
  transition: transform 200ms var(--ease-out), background-color 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.stack-card:hover,
.service-card:hover,
.case-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(124, 92, 255, 0.22);
}

.case-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.case-card__media {
  margin: 0 0 var(--space-4);
  border-radius: calc(var(--radius) - 2px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.02);
  transition: transform 420ms var(--ease-out);
}

.case-card:hover .case-card__media {
  transform: scale(1.01);
}

.case-card__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.stack-card__title,
.service-card__title,
.case-card__title {
  margin: 0 0 var(--space-3);
  font-size: 18px;
  letter-spacing: -0.02em;
}

.stack-card__text,
.service-card__text,
.case-card__text {
  margin: 0 0 var(--space-4);
  color: var(--muted);
}

.stack-card__list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.stack-card__list-item {
  margin: var(--space-1) 0;
}

.service-card__note {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  margin-bottom: var(--space-3);
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

.case-card__link {
  display: inline-flex;
  gap: 8px;
  font-weight: 600;
}

.case-card__link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.steps {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.steps__item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}

.steps__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  width: 48px;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.18);
  border: 1px solid rgba(124, 92, 255, 0.38);
  color: rgba(255, 255, 255, 0.86);
  font-weight: 700;
  font-size: 12px;
}

.about__text {
  margin: var(--space-4) 0 0;
  color: var(--muted);
  max-width: 72ch;
}

.contact__card {
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(180deg, rgba(124, 92, 255, 0.12), rgba(255, 255, 255, 0.03) 45%);
  padding: var(--space-6);
}

.contact__text {
  margin: var(--space-3) 0 var(--space-5);
  color: var(--muted);
  max-width: 70ch;
}

.contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.contact__hint {
  margin: var(--space-4) 0 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* Footer */
.site-footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.site-footer__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-footer__text {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.site-footer__link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0;
  transition: opacity 180ms ease;
}

.mobile-menu--open {
  pointer-events: auto;
  opacity: 1;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  border: 0;
  padding: 0;
  cursor: pointer;
}

.mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(420px, 92vw);
  background: rgba(11, 12, 16, 0.92);
  border-left: 1px solid var(--border);
  backdrop-filter: blur(12px);
  padding: var(--space-5);
  transform: translateX(8px);
  transition: transform 180ms ease;
  display: grid;
  grid-auto-rows: max-content;
  gap: var(--space-5);
}

.mobile-menu--open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.mobile-menu__name {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.mobile-menu__role {
  font-size: 13px;
  color: var(--muted);
}

.mobile-menu__close {
  height: 40px;
  width: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.86);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.mobile-menu__close:hover {
  background: rgba(255, 255, 255, 0.06);
}

.mobile-menu__close:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mobile-menu__nav {
  display: grid;
  gap: var(--space-2);
}

.mobile-menu__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 var(--space-3);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.86);
}

.mobile-menu__link:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
}

.mobile-menu__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mobile-menu__link--active {
  background: rgba(124, 92, 255, 0.14);
  border-color: rgba(124, 92, 255, 0.28);
}

.mobile-menu__cta {
  display: grid;
  gap: var(--space-3);
}

.mobile-menu__button {
  width: 100%;
}

/* Back to top */
.to-top {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: 40;
  height: 46px;
  width: 46px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(11, 12, 16, 0.72);
  color: rgba(255, 255, 255, 0.9);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: transform 160ms ease, background-color 160ms ease;
}

.to-top:hover {
  transform: translateY(-1px);
  background: rgba(11, 12, 16, 0.86);
}

.to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.to-top__icon {
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
}

/* Responsive */
@media (min-width: 700px) {
  .site-header__actions {
    display: block;
  }

  .site-header__toggle {
    display: none;
  }

  .site-nav {
    display: flex;
  }

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

  .stack__grid,
  .services__grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 950px) {
  .hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
}

@media (min-width: 1050px) {
  .portfolio__grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

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

  .button {
    transition: none;
  }

  .mobile-menu,
  .mobile-menu__panel,
  .to-top {
    transition: none;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }
}