/* Sectioan 04 — controlled end-to-end process / pinned editorial scrollytelling */

.section-04-proces {
  --process-header-offset: 5rem;
  --process-line-width: 0.5px;
  --process-track-inset: 12%;
  --process-progress: 0;
  --process-mobile-dot-y: 0px;
  position: relative;
  z-index: 1;
  background: var(--color-bg);
  color: var(--color-text);
  isolation: isolate;
}

.process-collection {
  position: relative;
  display: grid;
  min-height: max(calc(100svh - var(--process-header-offset)), 42rem);
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--hero-grid-gap);
  padding-inline: var(--hero-gutter);
  border-top: var(--process-line-width) solid var(--color-line);
  border-bottom: var(--process-line-width) solid var(--color-line);
  background: var(--color-bg);
}

.process-intro {
  position: sticky;
  top: var(--process-header-offset);
  display: grid;
  min-width: 0;
  height: max(calc(100svh - var(--process-header-offset)), 42rem);
  grid-column: 1 / 6;
  grid-template-rows: auto 1fr auto;
  padding-block: clamp(var(--space-lg), 5.2vh, var(--space-xl));
}

.process-index {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: max(0.6875rem, calc(11 * var(--fluid)));
  font-weight: 540;
  letter-spacing: 0.1em;
  line-height: 1.3;
  text-transform: uppercase;
}

.process-intro__body {
  width: min(100%, 34rem);
  align-self: center;
}

.process-intro__body h2 {
  max-width: 10ch;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(3.15rem, calc(70 * var(--fluid)), 5rem);
  font-variation-settings: "wght" 430;
  font-weight: 430;
  letter-spacing: -0.058em;
  line-height: 0.94;
  text-wrap: balance;
}

.process-intro__body h2 em {
  display: block;
  font-weight: inherit;
}

.process-intro__body > p {
  max-width: 46ch;
  margin: clamp(var(--space-md), 3.4vh, var(--space-lg)) 0 0;
  color: var(--color-text-muted);
  font-family: var(--font-text);
  font-size: var(--font-size-body);
  font-weight: 430;
  letter-spacing: -0.014em;
  line-height: 1.52;
}

.process-intro__assurance {
  display: grid;
  width: min(100%, 31rem);
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: baseline;
  padding-top: var(--space-sm);
  border-top: var(--process-line-width) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: max(0.625rem, calc(10 * var(--fluid)));
  font-weight: 540;
  letter-spacing: 0.09em;
  line-height: 1.4;
  text-transform: uppercase;
}

.process-intro__assurance span:first-child {
  color: var(--color-text-muted);
}

.process-intro__assurance span:last-child {
  justify-self: end;
  text-align: right;
}

.process-stage {
  position: relative;
  min-width: 0;
  grid-column: 7 / 13;
}

.process-track {
  position: absolute;
  z-index: 4;
  top: var(--process-track-inset);
  bottom: var(--process-track-inset);
  left: calc(var(--hero-grid-gap) * -0.5);
  width: 1.5rem;
  pointer-events: none;
  transform: translateX(-50%);
}

.process-track::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: var(--process-line-width);
  background: var(--color-line);
  content: "";
  transform: translateX(-50%);
}

.process-track__station {
  position: absolute;
  left: 50%;
  width: var(--space-xs);
  height: var(--process-line-width);
  background: var(--color-line);
  transform: translate(-50%, -50%);
}

.process-track__station:nth-child(1) { top: 0; }
.process-track__station:nth-child(2) { top: 33.333%; }
.process-track__station:nth-child(3) { top: 66.666%; }
.process-track__station:nth-child(4) { top: 100%; }

.process-track__dot {
  position: absolute;
  z-index: 2;
  top: calc(var(--process-progress) * 100%);
  left: 50%;
  display: block;
  width: 0.5625rem;
  height: 0.5625rem;
  border: 2px solid var(--color-bg);
  border-radius: var(--radius-full);
  background: var(--color-accent);
  box-shadow: 0 0 0 var(--process-line-width) var(--color-accent);
  transform: translate(-50%, -50%);
  will-change: top;
}

.process-list {
  min-height: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-item {
  display: flex;
  min-height: 72svh;
  align-items: center;
  padding: var(--space-xl) 0 var(--space-xl) clamp(var(--space-lg), calc(72 * var(--fluid)), var(--space-xl));
  border-bottom: var(--process-line-width) solid var(--color-line);
}

.process-item:last-child {
  border-bottom: 0;
}

.process-step {
  width: min(100%, 37rem);
}

.process-step__masthead {
  display: flex;
  gap: clamp(var(--space-sm), calc(24 * var(--fluid)), var(--space-md));
  align-items: flex-end;
}

.process-step__number {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(5.25rem, calc(142 * var(--fluid)), 10rem);
  font-variation-settings: "wght" 330;
  font-weight: 330;
  letter-spacing: -0.105em;
  line-height: 0.72;
}

.process-step__eyebrow {
  margin: 0 0 0.1em;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: max(0.6875rem, calc(11 * var(--fluid)));
  font-weight: 560;
  letter-spacing: 0.1em;
  line-height: 1.4;
  text-transform: uppercase;
}

.process-step__content {
  margin-top: clamp(var(--space-lg), 5.2vh, var(--space-xl));
}

.process-step__title {
  max-width: 12ch;
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: clamp(2.6rem, calc(58 * var(--fluid)), 4.2rem);
  font-variation-settings: "wght" 430;
  font-weight: 430;
  letter-spacing: -0.056em;
  line-height: 0.96;
  text-wrap: balance;
}

.process-step__descr {
  margin-top: var(--space-md);
}

.process-step__descr p {
  max-width: 49ch;
  margin: 0;
  color: var(--color-text-muted);
  font-family: var(--font-text);
  font-size: var(--font-size-body);
  font-weight: 430;
  letter-spacing: -0.014em;
  line-height: 1.52;
}

.process-step__result {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: baseline;
  margin: var(--space-lg) 0 0;
  padding-top: var(--space-sm);
  border-top: var(--process-line-width) solid var(--color-line);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: max(0.625rem, calc(10 * var(--fluid)));
  font-weight: 540;
  letter-spacing: 0.09em;
  line-height: 1.45;
  text-transform: uppercase;
}

.process-step__result span {
  color: var(--color-text-muted);
}

.process-step__result strong {
  justify-self: end;
  font-weight: inherit;
  text-align: right;
}

/* JS-stamped desktop mode: the copy occupies one focused stage. */
.process-collection[data-steps-mode="animated"] {
  height: max(calc(100svh - var(--process-header-offset)), 42rem);
  min-height: 0;
  overflow: hidden;
}

.process-collection[data-steps-mode="animated"] .process-intro {
  position: relative;
  top: auto;
  height: 100%;
}

.process-collection[data-steps-mode="animated"] .process-stage,
.process-collection[data-steps-mode="animated"] .process-list {
  height: 100%;
  min-height: 0;
}

.process-collection[data-steps-mode="animated"] .process-item {
  position: absolute;
  inset: 0;
  min-height: 0;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  border: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  will-change: opacity, transform;
}

.process-collection[data-steps-mode="animated"] [data-steps-item-status="active"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.process-collection[data-steps-mode="animated"] .process-step__masthead,
.process-collection[data-steps-mode="animated"] .process-step__content {
  will-change: transform, opacity;
}

/* The final horizontal rule is the handoff into the pricing specification grid. */
.section-04-proces::after {
  position: absolute;
  z-index: 3;
  right: var(--hero-gutter);
  bottom: 0;
  left: var(--hero-gutter);
  height: var(--process-line-width);
  background: var(--color-line);
  content: "";
  pointer-events: none;
}

@media (max-width: 1180px) and (min-width: 1025px) {
  .process-intro__body h2 {
    font-size: clamp(3rem, 5.7vw, 4.25rem);
  }

  .process-intro__body > p,
  .process-step__descr p {
    font-size: 1rem;
  }

  .process-item {
    padding-left: var(--space-lg);
  }

  .process-step__title {
    font-size: clamp(2.5rem, 4.6vw, 3.4rem);
  }
}

@media (max-width: 1024px) {
  .section-04-proces {
    --process-track-inset: 0%;
  }

  .process-collection {
    display: block;
    min-height: 0;
    padding: var(--space-section) var(--hero-gutter);
  }

  .process-intro {
    position: relative;
    top: auto;
    display: block;
    width: 100%;
    height: auto;
    min-height: 0;
    padding: 0;
  }

  .process-index {
    margin-bottom: var(--space-xl);
  }

  .process-intro__body {
    width: min(100%, 43rem);
  }

  .process-intro__body h2 {
    max-width: 11ch;
  }

  .process-intro__body > p {
    max-width: 51ch;
  }

  .process-intro__assurance {
    margin-top: var(--space-lg);
  }

  .process-stage {
    margin-top: var(--space-section);
  }

  .process-track {
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-50%);
  }

  .process-track__station {
    display: none;
  }

  .process-track__dot {
    top: var(--process-mobile-dot-y);
  }

  .process-list {
    padding-left: clamp(var(--space-lg), 8vw, var(--space-xl));
  }

  .process-item {
    min-height: 62svh;
    padding: var(--space-xl) 0;
    opacity: 1;
    transition: opacity var(--dur-fast) var(--ease-in-out);
  }

  .process-collection[data-steps-mode="natural"] .process-item {
    opacity: 0.38;
  }

  .process-collection[data-steps-mode="natural"] [data-steps-item-status="active"] {
    opacity: 1;
  }

  .process-step {
    width: min(100%, 39rem);
  }
}

@media (max-width: 767.98px) {
  html.is-process-current {
    scroll-padding-top: 4.75rem;
  }

  #site-header.process-header-surface {
    color: var(--tt-ink);
  }

  #site-header.process-header-surface::before {
    position: fixed;
    z-index: -1;
    top: 0;
    right: 0;
    left: 0;
    height: 4.75rem;
    border-bottom: var(--process-line-width) solid color-mix(in srgb, var(--tt-ink) 12%, transparent);
    background: var(--tt-paper);
    content: "";
    /* Re-assert opacity: the shared #site-header::before defaults to 0 (see section 02). */
    opacity: 1;
    pointer-events: none;
  }

  .section-04-proces {
    scroll-margin-top: 4.75rem;
  }

  .process-collection {
    padding-top: clamp(var(--space-xl), 20vw, var(--space-section));
    padding-bottom: clamp(var(--space-xl), 20vw, var(--space-section));
  }

  .process-index {
    margin-bottom: var(--space-lg);
    font-size: 0.6875rem;
  }

  .process-intro__body h2 {
    max-width: 9.5ch;
    font-size: clamp(2.8rem, 14.4vw, 4rem);
    line-height: 0.93;
  }

  .process-intro__body > p {
    margin-top: var(--space-md);
    font-size: clamp(0.9375rem, 4.1vw, 1.0625rem);
    line-height: 1.48;
  }

  .process-intro__assurance {
    grid-template-columns: 1fr;
    gap: var(--space-2xs);
    margin-top: var(--space-lg);
    font-size: 0.625rem;
  }

  .process-intro__assurance span:last-child {
    justify-self: start;
    text-align: left;
  }

  .process-stage {
    margin-top: var(--space-xl);
  }

  .process-list {
    padding-left: var(--space-lg);
  }

  .process-item {
    min-height: 65svh;
    padding: var(--space-lg) 0;
    scroll-margin-top: 4.75rem;
  }

  .process-step__masthead {
    gap: var(--space-sm);
  }

  .process-step__number {
    font-size: clamp(4.75rem, 25vw, 6.25rem);
  }

  .process-step__eyebrow {
    font-size: 0.625rem;
  }

  .process-step__content {
    margin-top: var(--space-lg);
  }

  .process-step__title {
    max-width: 11ch;
    font-size: clamp(2.25rem, 11.4vw, 3.1rem);
  }

  .process-step__descr {
    margin-top: var(--space-sm);
  }

  .process-step__descr p {
    max-width: 38ch;
    font-size: clamp(0.9375rem, 4vw, 1rem);
    line-height: 1.48;
  }

  .process-step__result {
    grid-template-columns: 1fr;
    gap: var(--space-2xs);
    margin-top: var(--space-md);
    font-size: 0.625rem;
  }

  .process-step__result strong {
    justify-self: start;
    text-align: left;
  }
}

html.is-reduced-motion .process-track__dot {
  display: none;
}

html.is-reduced-motion .process-item {
  opacity: 1 !important;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .process-item {
    opacity: 1 !important;
    transition: none;
  }
}