/* ========================================================================
   ALTO Digital — design tokens + base + components
   ======================================================================== */

:root {
  /* Brand */
  --alto-green: #1B4D3F;
  --alto-green-bright: #2A7A63;
  --alto-cream: #ECE6D6;
  --alto-black: #0A0A0A;
  --alto-near-black: #0F0F0E;
  --alto-text: #F5F2EA;
  --alto-text-dim: #9A968B;
  --alto-line: rgba(245, 242, 234, 0.08);
  --alto-line-strong: rgba(245, 242, 234, 0.18);

  /* Typography */
  --font-display: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* --------------------------- Reset / base --------------------------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--alto-black);
  color: var(--alto-text);
  font-family: var(--font-body);
  font-feature-settings: "ss01", "cv01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* --------------------------- Typography --------------------------- */
.font-display { font-family: var(--font-display); letter-spacing: -0.03em; }

.h-display {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 0.92;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--alto-text-dim);
}

/* --------------------------- Layout helpers --------------------------- */
.container-x {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: 24px;
}
@media (min-width: 768px)  { .container-x { padding-inline: 40px; } }
@media (min-width: 1024px) { .container-x { padding-inline: 56px; } }

.divider {
  height: 1px;
  background: var(--alto-line);
  width: 100%;
}

/* --------------------------- Buttons --------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  transition: transform 200ms var(--ease-out), background 200ms var(--ease-out), color 200ms var(--ease-out), border-color 200ms var(--ease-out);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn:focus-visible {
  outline: 2px solid var(--alto-cream);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--alto-cream);
  color: var(--alto-black);
}
.btn-primary:hover {
  background: #fff;
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--alto-text);
  border-color: var(--alto-line-strong);
}
.btn-ghost:hover {
  background: rgba(245, 242, 234, 0.06);
  border-color: var(--alto-text);
}
.btn .arrow {
  transition: transform 200ms var(--ease-out);
}
.btn:hover .arrow { transform: translateX(3px); }

/* --------------------------- Nav --------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  transition: background 300ms var(--ease-out), backdrop-filter 300ms var(--ease-out), border-color 300ms var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom-color: var(--alto-line);
}
.nav-logo { color: var(--alto-cream); display: inline-flex; align-items: center; }
.nav-logo svg { height: 28px; width: auto; }
.nav-links {
  display: none;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--alto-text-dim);
}
.nav-links a:hover { color: var(--alto-text); }
@media (min-width: 900px) {
  .nav { padding: 18px 40px; }
  .nav-links { display: flex; }
}

/* --------------------------- Hero / 3D stage --------------------------- */
.hero-stage {
  position: relative;
  height: 320vh; /* drives the scroll length */
  width: 100%;
}
.hero-pin {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}
.hero-canvas-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-canvas-wrap canvas { display: block; width: 100%; height: 100%; }

/* Hero content overlay layers */
.hero-content {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 2;
  pointer-events: none;
  padding: 0 24px;
}
.hero-frame {
  position: relative;
  text-align: center;
  width: 100%;
  max-width: 980px;
}
.hero-eyebrow {
  opacity: 0;
  transform: translateY(14px);
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 0.92;
  font-size: clamp(44px, 9vw, 124px);
  color: var(--alto-text);
  margin: 14px 0 22px;
}
.hero-title .accent { color: var(--alto-cream); }
.hero-title .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(28px);
  filter: blur(10px);
}
.hero-sub {
  font-size: clamp(15px, 1.6vw, 19px);
  color: var(--alto-text-dim);
  max-width: 620px;
  margin: 0 auto 28px;
  opacity: 0;
  transform: translateY(14px);
}
.hero-cta {
  pointer-events: auto;
  opacity: 0;
  transform: translateY(14px);
}

/* Bottom-of-hero scroll cue */
.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--alto-text-dim);
  z-index: 3;
  opacity: 0.0;
  transition: opacity 400ms var(--ease-out);
}
.scroll-cue.in-view { opacity: 0.9; }
.scroll-cue .line {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, transparent, var(--alto-text-dim));
  animation: cue 1.8s infinite var(--ease-in-out);
}
@keyframes cue {
  0%   { transform: scaleY(0.0); transform-origin: top; }
  50%  { transform: scaleY(1.0); transform-origin: top; }
  100% { transform: scaleY(0.0); transform-origin: bottom; }
}

/* Hero secondary state — when camera has pushed all the way in */
.hero-final {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 0 24px;
  opacity: 0;
  pointer-events: none;
  z-index: 2;
}
.hero-final .lens-blur {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(27, 77, 63, 0.55) 0%, rgba(10, 10, 10, 0) 60%);
  pointer-events: none;
}

/* --------------------------- Industry strip --------------------------- */
.industry-strip {
  border-top: 1px solid var(--alto-line);
  border-bottom: 1px solid var(--alto-line);
  padding: 28px 0;
  background: var(--alto-black);
}
.industry-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 28px;
  align-items: center;
  text-align: center;
}
@media (min-width: 768px) { .industry-row { grid-template-columns: repeat(5, 1fr); } }
.industry-row .item {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--alto-text-dim);
}

/* --------------------------- Section frame --------------------------- */
.section {
  position: relative;
  padding: 96px 0;
}
@media (min-width: 1024px) { .section { padding: 140px 0; } }

.section-head {
  display: grid;
  gap: 18px;
  margin-bottom: 56px;
  max-width: 880px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.96;
  font-size: clamp(36px, 5vw, 64px);
  margin: 0;
}
.section-head p {
  color: var(--alto-text-dim);
  font-size: clamp(15px, 1.4vw, 18px);
  margin: 0;
  max-width: 640px;
}

/* --------------------------- Offer card --------------------------- */
.offer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 1024px) { .offer-grid { grid-template-columns: 1.05fr 1fr; gap: 56px; } }

.offer-card {
  position: relative;
  border: 1px solid var(--alto-line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(27, 77, 63, 0.08), rgba(10, 10, 10, 0.0));
  padding: 32px;
  overflow: hidden;
}
@media (min-width: 1024px) { .offer-card { padding: 48px; } }
.offer-card .price-strip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--alto-cream);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--alto-line-strong);
  background: rgba(27, 77, 63, 0.14);
  margin-bottom: 22px;
}
.offer-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1;
  font-size: clamp(30px, 4vw, 48px);
  margin: 0 0 18px;
}
.offer-card .lead {
  color: var(--alto-text-dim);
  font-size: 17px;
  line-height: 1.55;
  margin: 0 0 28px;
  max-width: 560px;
}
.offer-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.offer-list li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  align-items: start;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--alto-text);
}
.offer-list li svg {
  margin-top: 4px;
  color: var(--alto-cream);
}
.offer-card .footnote {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--alto-line);
  font-size: 13px;
  color: var(--alto-text-dim);
}

.offer-aside {
  display: grid;
  align-content: center;
  gap: 18px;
}
.stat {
  border: 1px solid var(--alto-line);
  border-radius: 18px;
  padding: 24px;
  background: linear-gradient(180deg, rgba(245, 242, 234, 0.02), transparent);
}
.stat .num {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.04em;
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1;
  color: var(--alto-cream);
}
.stat .lab {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--alto-text-dim);
  margin-top: 12px;
}

/* --------------------------- Process --------------------------- */
.process {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px)  { .process { grid-template-columns: repeat(3, 1fr); gap: 32px; } }

.step {
  position: relative;
  border: 1px solid var(--alto-line);
  border-radius: 22px;
  padding: 32px 28px;
  background: rgba(245, 242, 234, 0.02);
  transition: border-color 300ms var(--ease-out), transform 300ms var(--ease-out), background 300ms var(--ease-out);
}
.step:hover {
  border-color: var(--alto-line-strong);
  background: rgba(27, 77, 63, 0.06);
  transform: translateY(-3px);
}
.step .num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--alto-cream);
  margin-bottom: 32px;
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--alto-line-strong);
  border-radius: 999px;
}
.step h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -0.035em;
  margin: 0 0 14px;
}
.step p {
  color: var(--alto-text-dim);
  font-size: 15.5px;
  line-height: 1.55;
  margin: 0;
}

/* --------------------------- Why ALTO grid --------------------------- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--alto-line);
  border-radius: 22px;
  background: var(--alto-line);
  overflow: hidden;
}
@media (min-width: 768px)  { .why-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .why-grid { grid-template-columns: repeat(4, 1fr); } }

.why-cell {
  background: var(--alto-black);
  padding: 32px 28px;
}
.why-cell .icon { color: var(--alto-cream); margin-bottom: 24px; }
.why-cell h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
.why-cell p {
  color: var(--alto-text-dim);
  font-size: 14.5px;
  line-height: 1.55;
  margin: 0;
}

/* --------------------------- Work / video grid --------------------------- */
.work-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px)  { .work-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (min-width: 1024px) { .work-grid { grid-template-columns: repeat(3, 1fr); } }

.work-tile {
  position: relative;
  aspect-ratio: 9 / 14;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--alto-line);
  background: #111;
  isolation: isolate;
}
.work-tile video,
.work-tile .placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.work-tile .placeholder {
  display: grid;
  place-items: center;
  color: var(--alto-text-dim);
  background:
    linear-gradient(135deg, rgba(27,77,63,0.35), rgba(10,10,10,0.9)),
    repeating-linear-gradient(45deg, rgba(245,242,234,0.04) 0 12px, transparent 12px 24px);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.work-tile .meta {
  position: absolute;
  left: 18px; bottom: 18px; right: 18px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 14px;
  z-index: 2;
}
.work-tile .meta .name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--alto-text);
}
.work-tile .meta .tag {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--alto-cream);
}
.work-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,0.85) 0%, rgba(10,10,10,0) 50%);
  z-index: 1;
}

/* --------------------------- Testimonials --------------------------- */
.testi-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .testi-grid { grid-template-columns: repeat(3, 1fr); } }
.testi {
  border: 1px solid var(--alto-line);
  border-radius: 22px;
  padding: 28px;
  background: rgba(245, 242, 234, 0.02);
  display: grid;
  gap: 22px;
}
.testi blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.testi .who {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--alto-text-dim);
  font-size: 13.5px;
}
.testi .who .dot {
  width: 36px; height: 36px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--alto-green), var(--alto-green-bright));
  display: grid; place-items: center;
  color: var(--alto-cream);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
}

/* --------------------------- FAQ --------------------------- */
.faq-list { display: grid; gap: 0; border-top: 1px solid var(--alto-line); }
.faq-item { border-bottom: 1px solid var(--alto-line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  list-style: none;
  cursor: pointer;
  padding: 24px 4px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 1.7vw, 20px);
  letter-spacing: -0.01em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus {
  width: 22px; height: 22px;
  position: relative;
  flex: 0 0 22px;
  color: var(--alto-cream);
  transition: transform 240ms var(--ease-out);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after {
  content: "";
  position: absolute;
  inset: 50% 0;
  height: 1.5px;
  background: currentColor;
  transform-origin: center;
  border-radius: 2px;
}
.faq-item summary .plus::after {
  transform: rotate(90deg);
  transition: transform 240ms var(--ease-out);
}
.faq-item[open] summary .plus::after { transform: rotate(0deg); }
.faq-item .body {
  padding: 0 4px 24px;
  color: var(--alto-text-dim);
  font-size: 15.5px;
  line-height: 1.6;
  max-width: 760px;
}

/* --------------------------- Contact --------------------------- */
.contact {
  position: relative;
  border: 1px solid var(--alto-line);
  border-radius: 28px;
  padding: 40px 28px;
  background:
    radial-gradient(60% 80% at 100% 0%, rgba(27, 77, 63, 0.22), transparent 60%),
    radial-gradient(40% 60% at 0% 100%, rgba(236, 230, 214, 0.06), transparent 60%),
    rgba(245, 242, 234, 0.02);
  overflow: hidden;
}
@media (min-width: 1024px) { .contact { padding: 64px; } }

.contact-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) { .contact-grid { grid-template-columns: 1fr 1fr; gap: 56px; } }

.contact h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  font-size: clamp(36px, 5vw, 64px);
  margin: 0 0 18px;
}
.contact .lead { color: var(--alto-text-dim); font-size: 17px; line-height: 1.55; max-width: 480px; }
.contact .meta { margin-top: 28px; display: grid; gap: 6px; font-size: 14px; color: var(--alto-text-dim); }
.contact .meta a:hover { color: var(--alto-text); }

.field { display: grid; gap: 8px; }
.field label {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--alto-text-dim);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  background: rgba(245, 242, 234, 0.04);
  color: var(--alto-text);
  border: 1px solid var(--alto-line-strong);
  border-radius: 12px;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 15.5px;
  transition: border-color 200ms var(--ease-out), background 200ms var(--ease-out);
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--alto-cream);
  background: rgba(245, 242, 234, 0.06);
}
.field textarea { min-height: 130px; resize: vertical; }
.form-row { display: grid; gap: 16px; }
@media (min-width: 768px) { .form-row.two { grid-template-columns: 1fr 1fr; } }

.form-status {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  display: none;
}
.form-status.show { display: block; }
.form-status.ok { background: rgba(42, 122, 99, 0.18); color: #B7E5D2; border: 1px solid rgba(42, 122, 99, 0.4); }
.form-status.err { background: rgba(220, 80, 80, 0.12); color: #F1C0C0; border: 1px solid rgba(220, 80, 80, 0.35); }

/* --------------------------- Footer --------------------------- */
.footer {
  border-top: 1px solid var(--alto-line);
  padding: 40px 0 32px;
  margin-top: 80px;
}
.footer-row {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 768px) { .footer-row { grid-template-columns: auto 1fr auto; } }
.footer-meta {
  display: flex;
  gap: 18px;
  font-size: 13px;
  color: var(--alto-text-dim);
  flex-wrap: wrap;
  justify-content: flex-start;
}
@media (min-width: 768px) { .footer-meta { justify-content: center; } }
.footer-meta a:hover { color: var(--alto-text); }
.footer .copy { font-size: 12.5px; color: var(--alto-text-dim); }

/* --------------------------- Reveal-on-scroll --------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
  will-change: transform, opacity;
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * { transition-delay: var(--d, 0ms); }

/* --------------------------- Grain overlay --------------------------- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 60;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1   0 0 0 0 1   0 0 0 0 1   0 0 0 0.6 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* --------------------------- Reduced motion --------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .hero-stage { height: 100vh; }
  .hero-pin { position: relative; }
  .hero-eyebrow, .hero-title .word, .hero-sub, .hero-cta { opacity: 1; transform: none; filter: none; }
  .reveal { opacity: 1; transform: none; }
}