/* ==========================================================================
   Arush Web Design — design tokens
   ========================================================================== */

:root {
  /* color */
  --ink: #0C0F13;
  --ink-soft: #14181E;
  --paper: #F3EEE4;
  --paper-dim: #E4DCCB;
  --graphite: #53575D;
  --chrome: #B7BCC4;
  --marine: #2E6E8E;
  --marine-bright: #4A93B6;

  /* type */
  --font-display: "Montserrat", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  /* layout */
  --container: 1280px;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --header-h: 76px;

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ==========================================================================
   Reset
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body, h1, h2, h3, p, figure, ol, ul { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--marine);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 2px solid var(--marine);
  outline-offset: 3px;
}

/* ==========================================================================
   Type primitives
   ========================================================================== */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--marine);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  row-gap: 0.4rem;
  column-gap: 0.65rem;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

.hero .eyebrow,
.process .eyebrow,
.about .eyebrow {
  color: var(--marine-bright);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(1.8rem, 3.2vw + 0.6rem, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  max-width: 18ch;
  margin-top: 0.9rem;
}

.section-head {
  padding: 0 var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.5rem;
  border: 1px solid transparent;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn-primary {
  background: var(--marine);
  color: var(--paper);
  border-color: var(--marine);
}
.btn-primary:hover { background: var(--marine-bright); border-color: var(--marine-bright); }

.btn-ghost {
  border-color: var(--chrome);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--marine); color: var(--marine); }

.btn-text {
  padding: 0.85rem 0;
  color: var(--paper);
  border-bottom: 1px solid transparent;
}
.btn-text:hover { border-bottom-color: currentColor; }

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: var(--ink);
  border-bottom-color: rgba(183, 188, 196, 0.18);
}

.header-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-right: auto;
}
.brand-mark { width: 34px; height: 34px; }
.brand-word {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.brand-accent { color: var(--marine-bright); }

.primary-nav ul {
  display: flex;
  gap: 2rem;
}
.primary-nav a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--chrome);
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.primary-nav a:hover { color: var(--paper); border-bottom-color: var(--marine-bright); }

.header-cta { flex-shrink: 0; border-color: var(--chrome); color: var(--paper); }
.header-cta:hover { border-color: var(--marine-bright); color: var(--marine-bright); }

.menu-toggle {
  display: none;
  width: 32px;
  height: 24px;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
}
.menu-toggle span {
  display: block;
  height: 1px;
  background: var(--paper);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(11.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-11.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--ink);
  border-bottom: 1px solid rgba(183, 188, 196, 0.18);
  padding: 1.5rem var(--gutter) 2rem;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.mobile-nav.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mobile-nav ul { display: flex; flex-direction: column; gap: 1.1rem; margin-bottom: 1.5rem; }
.mobile-nav a {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--paper);
}
.mobile-nav .btn { width: 100%; justify-content: center; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  height: 200vh;
}

.hero-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--header-h);
}

.hero-copy {
  width: 100%;
  min-width: 0;
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
  text-align: center;
}

.hero-headline {
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(2.5rem, 6vw + 0.5rem, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin-top: 1.4rem;
}
.hero-headline em {
  font-style: italic;
  font-weight: 400;
  color: var(--marine-bright);
}

.hero-sub {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--chrome);
  max-width: 42rem;
  margin: 1.5rem auto 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.75rem;
  margin-top: 2.25rem;
  flex-wrap: wrap;
}

.hero-copy .eyebrow {
  justify-content: center;
}

.hero-scroll-cue {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--chrome);
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}
.hero-scroll-cue::after {
  content: "";
  display: block;
  width: 1px;
  height: 22px;
  margin: 0.6rem auto 0;
  background: var(--chrome);
  animation: scroll-cue 1.8s var(--ease) infinite;
}
@keyframes scroll-cue {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40% { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60% { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* Per-character spans used by the scroll-driven "typewriter out" effect (script.js) */
.tw-char {
  white-space: pre-wrap;
}


@media (prefers-reduced-motion: reduce) {
  .hero { height: auto; }
  .hero-pin { position: relative; padding: 6rem 0 4rem; }
  .hero-scroll-cue { display: none; }
}

/* ==========================================================================
   Work / case study
   ========================================================================== */

.work {
  background: var(--paper);
  padding: 0 0 4.5rem;
}

/* The case-study image starts full-bleed (continuing straight out of the
   hero) and shrinks into a docked card as the section is scrolled through —
   one element, one continuous move, driven by script.js. */
.work-pin-wrap {
  position: relative;
  height: 220vh;
}

.work-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: var(--paper);
}

.work-pin-head {
  position: absolute;
  top: calc(var(--header-h) + 2rem);
  left: 0;
  right: 0;
  padding: 0 var(--gutter);
  opacity: 0;
  z-index: 3;
}

.shrink-media {
  position: absolute;
  top: 0;
  left: 50%;
  width: 100%;
  height: 100vh;
  transform: translateX(-50%);
  overflow: hidden;
  background: var(--ink);
}
.shrink-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.94;
}
.shrink-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    var(--ink) 0%,
    rgba(12, 15, 19, 0.9) 10%,
    rgba(12, 15, 19, 0.5) 26%,
    rgba(12, 15, 19, 0.1) 46%,
    transparent 64%
  );
  opacity: var(--top-fade, 1);
}
.shrink-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12, 15, 19, 0.82) 0%, rgba(12, 15, 19, 0.15) 42%, transparent 65%);
  opacity: var(--dock, 0);
}

.case-overlay {
  position: absolute;
  left: clamp(1.25rem, 3vw, 2.5rem);
  bottom: clamp(1.25rem, 3vw, 2.5rem);
  z-index: 2;
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  color: var(--paper);
  font-size: clamp(2rem, 6vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.01em;
  opacity: var(--dock, 0);
}

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

.case-caption {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  border-top: 1px solid var(--paper-dim);
  padding: 1.1rem var(--gutter);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--graphite);
}

.work-note {
  position: relative;
  max-width: var(--container);
  margin: 2.5rem auto 0;
  padding: 0 var(--gutter);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--graphite);
}

@media (prefers-reduced-motion: reduce) {
  .work-pin-wrap { height: auto; }
  .work-pin { position: relative; height: auto; padding: 6rem 0 3rem; }
  .work-pin-head { position: relative; top: 0; opacity: 1; margin-bottom: 2rem; }
  .shrink-media {
    position: relative;
    left: 0;
    transform: none;
    width: min(100% - 2 * var(--gutter), var(--container));
    height: clamp(320px, 50vh, 620px);
    margin: 0 auto;
  }
  .shrink-media::before { display: none; }
  .shrink-media::after,
  .case-overlay { opacity: 1; }
}

/* ==========================================================================
   Process
   ========================================================================== */

.process {
  background: var(--ink);
  color: var(--paper);
  padding: 6rem 0;
}

.process-list {
  max-width: var(--container);
  margin: 3rem auto 0;
  padding: 0 var(--gutter);
  border-top: 1px solid rgba(183, 188, 196, 0.22);
}

.process-step {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(183, 188, 196, 0.22);
}

.process-index {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--marine-bright);
  padding-top: 0.3rem;
}

.process-body h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
}
.process-body p {
  margin-top: 0.6rem;
  color: var(--chrome);
  max-width: 42rem;
  line-height: 1.6;
}

/* ==========================================================================
   Capabilities
   ========================================================================== */

.capabilities {
  background: var(--paper);
}

/* A five-panel strip (the intro + four capabilities) pinned and dragged
   left continuously as the section is scrolled through — driven by
   script.js. No holds, no per-panel crossfade: horizontal position is a
   straight 1:1 function of scroll progress. */
.cap-pin-wrap {
  position: relative;
  height: 500vh;
}

.cap-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
}

.cap-track {
  display: flex;
  height: 100%;
  width: 500%;
  will-change: transform;
}

.cap-slide {
  flex: 0 0 20%;
  width: 20%;
  height: 100%;
  box-sizing: border-box;
  border: 1px solid var(--paper-dim);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.5rem clamp(1.5rem, 5vw, 5rem);
}

.cap-slide-heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(2.2rem, 4.2vw + 1rem, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 16ch;
}
.cap-slide h2.cap-slide-heading {
  margin-top: 0.9rem;
}

.cap-slide-body {
  margin-top: 1.5rem;
  font-size: clamp(1.05rem, 0.5vw + 0.95rem, 1.3rem);
  line-height: 1.6;
  color: var(--graphite);
  max-width: 32rem;
}

@media (prefers-reduced-motion: reduce) {
  .cap-pin-wrap { height: auto; }
  .cap-pin { position: relative; height: auto; padding: 2.5rem var(--gutter); }
  .cap-track {
    display: block;
    width: auto;
    height: auto;
    transform: none !important;
  }
  .cap-slide {
    flex: none;
    width: auto;
    height: auto;
    margin-bottom: 1.5rem;
  }
}

/* ==========================================================================
   About
   ========================================================================== */

.about {
  background: var(--ink);
  color: var(--paper);
  padding: 6rem var(--gutter);
}
.about-inner {
  max-width: 46rem;
  margin: 0 auto;
}
.about-text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.2rem, 1.8vw + 0.7rem, 1.6rem);
  line-height: 1.55;
  margin-top: 1.4rem;
  color: var(--paper);
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact {
  background: var(--paper);
  padding: 6rem var(--gutter) 5rem;
}
.contact-inner {
  max-width: 40rem;
  margin: 0 auto;
}
.contact-headline {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 4vw + 0.5rem, 3.2rem);
  letter-spacing: -0.01em;
  margin-top: 1rem;
}
.contact-sub {
  margin-top: 1rem;
  color: var(--graphite);
  max-width: 34rem;
  line-height: 1.6;
}

.contact-form {
  margin-top: 2.75rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--graphite);
}
.field input,
.field textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--paper-dim);
  padding: 0.6rem 0.1rem;
  font-size: 1rem;
  resize: vertical;
  transition: border-color 0.2s var(--ease);
}
.field input:focus,
.field textarea:focus { border-bottom-color: var(--marine); }

.contact-form .btn { margin-top: 0.5rem; align-self: flex-start; }

.contact-direct {
  margin-top: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--graphite);
}
.contact-direct a { color: var(--marine); border-bottom: 1px solid transparent; }
.contact-direct a:hover { border-bottom-color: var(--marine); }

/* ==========================================================================
   Footer
   ========================================================================== */

/* ==========================================================================
   Section transitions — a subtle blend at every ink/paper seam, site-wide
   ========================================================================== */

.work,
.process,
.contact {
  position: relative;
}

.work::after,
.process::after,
.contact::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(48px, 6vw, 72px);
  pointer-events: none;
}

.work::after { background: linear-gradient(to bottom, transparent, var(--ink)); }
.process::after { background: linear-gradient(to bottom, transparent, var(--paper)); }
.contact::after { background: linear-gradient(to bottom, transparent, var(--ink)); }

.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 2.5rem var(--gutter);
  border-top: 1px solid rgba(183, 188, 196, 0.18);
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem 2rem;
}
.brand-footer { margin-right: auto; }
.footer-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--chrome);
}
.code-glyph { color: var(--marine-bright); }
.footer-back {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--chrome);
  border-bottom: 1px solid transparent;
}
.footer-back:hover { color: var(--paper); border-bottom-color: var(--paper); }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(1) { transition-delay: 0.02s; }
.reveal:nth-child(2) { transition-delay: 0.12s; }
.reveal:nth-child(3) { transition-delay: 0.22s; }
.reveal:nth-child(4) { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* Contact — every piece of the section (heading, copy, each form field,
   the button, the direct-email line) rises up in a staggered cascade the
   moment the section scrolls into view. Delay per element is set inline
   by script.js since the targets span more than one parent, so nth-child
   staggering won't reach all of them. */
.contact-rise {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.contact-rise.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .contact-rise { opacity: 1; transform: none; }
}

/* ==========================================================================
   Breakpoints
   ========================================================================== */

@media (min-width: 860px) {
  .process-step { grid-template-columns: 5rem 1fr; }
}

@media (min-width: 960px) {
  .primary-nav { display: block; }
  .header-cta { display: inline-flex; }
  .menu-toggle { display: none; }
  .mobile-nav { display: none !important; }
}

@media (max-width: 959px) {
  .primary-nav { display: none; }
  .header-cta { display: none; }
  .menu-toggle { display: flex; }
  .mobile-nav { display: block; }
}

@media (min-width: 1100px) {
  .case-caption { font-size: 0.85rem; }
}