/* ==========================================================================
   VANTIX SYSTEMS — pages/solutions.css
   One light section per solution (shown one at a time): heading + image, scrolling marquee,
      process timeline, "next solution" link.  4. Closing call to action.
   Phones and tablets get a plain vertical layout (no pinning).
   ========================================================================== */

/* Page wipe when a solution opens or closes */
.sd-wipe {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 2rem;
  color: var(--white);
  text-align: center;
  background: var(--navy);
  pointer-events: none;
  clip-path: inset(100% 0 0 0);
}
.sd-wipe span {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 5.5rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

/* ---------- 3. One solution ---------- */
.sd {
  /* Light theme. Swap these values to get a dark variant later. */
  --sd-bg: #ffffff;
  --sd-fg: var(--ink);
  --sd-muted: var(--slate);
  --sd-faint: #8a94a6;
  --sd-line: var(--line);
  --sd-accent: var(--blue-600);
  --sd-accent-2: #2fa8e6;
  --sd-dot-off: #dfe6f0;
  --sd-stroke: rgba(10, 20, 36, 0.38);
  --sd-panel: var(--bg);
  position: relative;
  overflow: hidden;
  color: var(--sd-fg);
  background: var(--sd-bg);
  scroll-margin-top: 0;
}

/* One solution at a time (only when scripts run) */
html.js .sd { display: none; }
html.js .sd.is-current { display: block; }

.sd__hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
  padding-top: calc(var(--header-h) + clamp(2rem, 5vw, 4rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.sd__label {
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sd-accent);
}

.sd__title {
  margin-top: 1rem;
  font-size: clamp(2.25rem, 5.4vw, 4.75rem);
  font-weight: 500;
  line-height: 1.04;
  letter-spacing: -0.04em;
}
.sd__title em {
  font-style: italic;
  background: linear-gradient(90deg, #2e6cc6, #2fa8e6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-right: 0.12em;
}

.sd__lead {
  max-width: 34rem;
  margin-top: 1.5rem;
  color: var(--sd-muted);
  font-size: var(--step-1);
  line-height: 1.55;
}

.sd__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.75rem;
  margin-top: 2rem;
}
.sd__tag {
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sd-faint);
}
.sd__note {
  max-width: 34rem;
  margin-top: 1.5rem;
  color: var(--sd-faint);
  font-size: var(--step--1);
  line-height: 1.5;
}

.sd__figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border-radius: 1.25rem;
  background: var(--sd-panel);
}
.sd__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform;
}

/* Marquee */
.sd__marquee {
  overflow: hidden;
  padding: 2rem 0;
  border-block: 1px solid var(--sd-line);
}
.sd__row {
  overflow: hidden;
  white-space: nowrap;
}
.sd__track {
  display: flex;
  width: max-content;
  align-items: center;
  gap: 2rem;
  padding-right: 2rem;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 6.5vw, 5.5rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  animation: sd-marquee 55s linear infinite;
}
.sd__track b {
  flex: none;
  font-weight: 400;
  color: var(--sd-accent);
}
.sd__row--outline .sd__track {
  color: transparent;
  -webkit-text-stroke: 1px var(--sd-stroke);
}
.sd__row--outline .sd__track b {
  -webkit-text-stroke: 0;
  color: var(--sd-accent);
}
.sd__row--rev .sd__track {
  animation-direction: reverse;
}
@keyframes sd-marquee {
  to { transform: translateX(-50%); }
}

/* Process */
.sd__process {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2rem, 6vw, 6rem);
  padding-top: clamp(4rem, 8vw, 7rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}
.sd__phead {
  align-self: start;
}
.sd__ptitle {
  margin-top: 1rem;
  max-width: 12ch;
  font-size: clamp(2rem, 4.2vw, 3.5rem);
  font-weight: 500;
  line-height: 1.06;
  letter-spacing: -0.035em;
}

.sd__steps {
  position: relative;
  padding-left: 3rem;
}
.sd__line {
  position: absolute;
  left: 0.45rem;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 2px;
  background: var(--sd-line);
}
.sd__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--sd-accent);
  transform: scaleY(1);
  transform-origin: top;
}
.sd__step {
  position: relative;
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}
.sd__step:last-child {
  padding-bottom: 0;
}
.sd__dot {
  position: absolute;
  left: -3rem;
  top: 0.45rem;
  width: 1rem;
  height: 1rem;
  margin-left: 0.01rem;
  border-radius: 50%;
  background: var(--sd-accent);
  box-shadow: 0 0 0 5px rgba(54, 120, 212, 0.16);
}
.sd__step h4 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}
.sd__step p {
  max-width: 32rem;
  margin-top: 0.6rem;
  color: var(--sd-muted);
  line-height: 1.55;
}

/* Scroll-linked state (only when scripts run) */
.sd--live .sd__step h4,
.sd--live .sd__step p {
  transition: color 0.5s ease, opacity 0.5s ease;
  opacity: 0.38;
}
.sd--live .sd__step.is-active h4,
.sd--live .sd__step.is-active p,
.sd--live .sd__step.is-done h4,
.sd--live .sd__step.is-done p {
  opacity: 1;
}
.sd--live .sd__dot {
  background: var(--sd-dot-off);
  box-shadow: 0 0 0 5px rgba(10, 20, 36, 0.04);
  transition: background-color 0.5s ease, box-shadow 0.5s ease;
}
.sd--live .sd__step.is-active .sd__dot,
.sd--live .sd__step.is-done .sd__dot {
  background: var(--sd-accent);
  box-shadow: 0 0 0 5px rgba(54, 120, 212, 0.2);
}
.sd--live .sd__fill {
  transform: scaleY(0);
}

/* Next solution */
.sd__next {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: clamp(4rem, 9vw, 7rem) var(--gutter);
  text-align: center;
  border-top: 1px solid var(--sd-line);
}
.sd__nextname {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 5rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.035em;
}
.sd__round {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  margin-top: 0.75rem;
  border: 1px solid var(--sd-stroke);
  border-radius: 50%;
  transition: background-color 0.4s ease, color 0.4s ease, transform 0.5s var(--ease);
}
.sd__round svg {
  width: 1.1rem;
  height: 1.1rem;
  transform: rotate(45deg);
}
.sd__next:hover .sd__round,
.sd__next:focus-visible .sd__round {
  color: var(--white);
  background: var(--sd-accent);
  border-color: var(--sd-accent);
  transform: translateY(0.35rem);
}

/* ---------- Tablet and below ---------- */
@media (min-width: 64rem) {
  .sd__phead {
    position: sticky;
    top: 22vh;
  }
}
@media (max-width: 63.9375rem) {
  .sd__hero,
  .sd__process {
    grid-template-columns: 1fr;
  }
  .sd__figure {
    aspect-ratio: 4 / 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sd__track {
    animation: none;
  }
}