/* ═══════════════════════════════════════════════════════════════════
   projects.css — SmartR Spaces Project Library
   Design: Editorial Sticky Scroll Stack
   ═══════════════════════════════════════════════════════════════════ */

/* ── Page hero ────────────────────────────────────────────────────── */
.projects-hero {
  padding: clamp(7rem, 14vw, 11rem) 0 clamp(3rem, 6vw, 5rem);
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}
.projects-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 80% 20%, rgba(0,168,107,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 10% 80%, rgba(0,168,107,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.projects-hero__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 3rem);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 2rem;
}

.projects-hero__eyebrow {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  display: block;
}

.projects-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 0.95;
  color: var(--color-text);
}

.projects-hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.projects-hero__sub {
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 38ch;
  margin-top: 1.5rem;
}

.projects-hero__count {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 1;
  color: rgba(0,0,0,0.06);
  text-align: right;
  align-self: start;
  white-space: nowrap;
  user-select: none;
}

/* ── Divider rule ─────────────────────────────────────────────────── */
.projects-rule {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 3rem);
  height: 1px;
  background: var(--color-glass-border);
}

/* ── Sticky stack container ───────────────────────────────────────── */
.projects-stack {
  position: relative;
}

/* ── Single project card ──────────────────────────────────────────── */
.proj-card {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 55fr 45fr;
  background: var(--color-bg);
  /* Stacking: each card sits above the previous */
  z-index: 1;
}
/* Each card gets incrementally higher z-index via inline style from JS */

/* ── Image panel ──────────────────────────────────────────────────── */
.proj-card__img-wrap {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
}

.proj-card__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.04);
  transition: transform 0.8s var(--ease-out-expo);
}
.proj-card.is-active .proj-card__img {
  transform: scale(1);
}

/* gradient overlay for depth */
.proj-card__img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, transparent 60%, var(--color-bg) 100%),
    linear-gradient(to top, rgba(0,0,0,0.28) 0%, transparent 50%);
  pointer-events: none;
}

/* project index — big ghost number on image */
.proj-card__index {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  font-family: var(--font-heading);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  color: rgba(255,255,255,0.12);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 2;
}

/* type badge on image */
.proj-card__badge {
  position: absolute;
  top: 2rem;
  left: 2rem;
  z-index: 3;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.9);
  background: rgba(0,0,0,0.32);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  padding: 0.35rem 0.9rem;
}

/* ── Detail panel ─────────────────────────────────────────────────── */
.proj-card__detail {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(3rem, 6vw, 6rem) clamp(2rem, 4vw, 4rem) clamp(3rem, 6vw, 6rem) clamp(1.5rem, 3vw, 3rem);
  min-height: 100vh;
  position: relative;
  z-index: 2;
}

/* accent line — color-coded per project */
.proj-card__accent-line {
  width: 36px;
  height: 3px;
  border-radius: 100px;
  background: var(--proj-accent, var(--color-accent));
  margin-bottom: 2rem;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity 500ms ease, transform 600ms var(--ease-out-expo);
}
.proj-card.is-active .proj-card__accent-line {
  opacity: 1;
  transform: scaleX(1);
}

.proj-card__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: 0.4rem;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease 100ms, transform 600ms var(--ease-out-expo) 100ms;
}
.proj-card.is-active .proj-card__title { opacity: 1; transform: translateY(0); }

.proj-card__meta {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 550ms ease 180ms, transform 550ms var(--ease-out-expo) 180ms;
}
.proj-card.is-active .proj-card__meta { opacity: 1; transform: translateY(0); }

.proj-card__meta span + span::before {
  content: ' · ';
  color: var(--color-text-faint);
}

/* ── Detail rows ──────────────────────────────────────────────────── */
.proj-detail-block {
  margin-bottom: 1.75rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 550ms ease, transform 550ms var(--ease-out-expo);
}
.proj-card.is-active .proj-detail-block:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 240ms; }
.proj-card.is-active .proj-detail-block:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 320ms; }
.proj-card.is-active .proj-detail-block:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 400ms; }
.proj-card.is-active .proj-detail-block:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 480ms; }

.proj-detail-block__label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-faint);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.proj-detail-block__label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-glass-border);
}

.proj-detail-block__list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.proj-detail-block__list li {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-text-muted);
  padding-left: 1rem;
  position: relative;
}
.proj-detail-block__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--proj-accent, var(--color-accent));
}

/* Brands as chips */
.proj-brands {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.25rem;
}
.proj-brand-chip {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: rgba(0,0,0,0.04);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 100px;
  padding: 0.2rem 0.65rem;
}

/* Energy impact pill */
.proj-energy {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.5rem;
  background: rgba(0,168,107,0.06);
  border: 1px solid rgba(0,168,107,0.16);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  margin-top: 0.25rem;
}
.proj-energy__icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.05em;
}
.proj-energy__text {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--color-accent-deep);
  font-weight: 500;
}

/* ── Blog CTA (hidden by default) ────────────────────────────────── */
.proj-card__cta {
  margin-top: 2.5rem;
  display: none; /* set to flex to reveal when blog post is ready */
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  text-decoration: none;
  border-bottom: 1px solid rgba(0,168,107,0.25);
  padding-bottom: 0.15rem;
  width: fit-content;
  transition: color 200ms ease, border-color 200ms ease, gap 200ms ease;
  opacity: 0;
  transform: translateY(12px);
}
.proj-card.is-active .proj-card__cta {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 500ms ease 560ms, transform 500ms var(--ease-out-expo) 560ms,
              color 200ms ease, border-color 200ms ease, gap 200ms ease;
}
.proj-card__cta.is-visible {
  display: flex;
}
.proj-card__cta:hover {
  color: var(--color-accent);
  border-color: rgba(0,168,107,0.5);
  gap: 0.75rem;
}
.proj-card__cta svg {
  transition: transform 200ms ease;
}
.proj-card__cta:hover svg {
  transform: translateX(3px);
}

/* ── Scroll progress bar ──────────────────────────────────────────── */
.projects-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(0,0,0,0.06);
  z-index: 200;
}
.projects-progress__fill {
  height: 100%;
  background: var(--color-accent);
  width: 0%;
  transition: width 100ms linear;
}

/* ── Footer CTA section ───────────────────────────────────────────── */
.projects-cta-section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  background: var(--color-bg-alt);
  text-align: center;
}
.projects-cta-section h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}
.projects-cta-section p {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .proj-card {
    grid-template-columns: 1fr;
    grid-template-rows: 55vh auto;
    min-height: auto;
    position: relative; /* disable sticky on mobile */
    top: auto;
  }
  .proj-card__img-wrap {
    min-height: 55vh;
    position: relative;
  }
  .proj-card__img-wrap::after {
    background:
      linear-gradient(to top, var(--color-bg) 8%, transparent 50%),
      linear-gradient(to top, rgba(0,0,0,0.28) 0%, transparent 50%);
  }
  .proj-card__detail {
    min-height: auto;
    padding: 2rem clamp(1.25rem, 5vw, 2.5rem) 3rem;
    justify-content: flex-start;
  }
  .proj-card__index { font-size: 4rem; }
  .projects-hero__inner {
    grid-template-columns: 1fr;
  }
  .projects-hero__count { display: none; }
}

@media (max-width: 600px) {
  .proj-card {
    grid-template-rows: 48vw auto;
  }
  .proj-card__img-wrap { min-height: 48vw; }
  .proj-card__title { font-size: 1.75rem; }
}