/* ============================================================
   PROJECTS SECTION — Featured Work Showcase
   Mock UI cards · 3D tilt · Scroll reveals · Theme-aware
   ============================================================ */

/* ── Theme Tokens ────────────────────────────────────────── */
[data-theme="dark"] .projects {
  --proj-card-bg: #121216;
  --proj-glass: rgba(255,255,255,0.035);
  --proj-btn-bg: rgba(255,255,255,0.07);
  --proj-btn-bg-h: rgba(255,255,255,0.13);
  --proj-tag-bg: rgba(255,255,255,0.055);
  --proj-tag-bg-h: rgba(255,255,255,0.10);
  --proj-sep: rgba(255,255,255,0.07);
  --proj-sep-h: rgba(255,255,255,0.14);
  --proj-sep-strong: rgba(255,255,255,0.18);
  --proj-t1: #f0f0f3;
  --proj-t2: rgba(240,240,243,0.58);
  --proj-t3: rgba(240,240,243,0.32);
  --proj-t4: rgba(240,240,243,0.16);
  --proj-accent: var(--accent);
  --proj-accent-dim: var(--accent-dim);
}

[data-theme="light"] .projects {
  --proj-card-bg: #ffffff;
  --proj-glass: rgba(0,0,0,0.02);
  --proj-btn-bg: rgba(0,0,0,0.05);
  --proj-btn-bg-h: rgba(0,0,0,0.09);
  --proj-tag-bg: rgba(0,0,0,0.04);
  --proj-tag-bg-h: rgba(0,0,0,0.07);
  --proj-sep: rgba(0,0,0,0.07);
  --proj-sep-h: rgba(0,0,0,0.12);
  --proj-sep-strong: rgba(0,0,0,0.18);
  --proj-t1: #111;
  --proj-t2: rgba(17,17,17,0.6);
  --proj-t3: rgba(17,17,17,0.35);
  --proj-t4: rgba(17,17,17,0.18);
  --proj-accent: var(--accent);
  --proj-accent-dim: var(--accent-dim);
}

/* ── Section Layout ──────────────────────────────────────── */
.projects {
  background: var(--bg);
  color: var(--proj-t1);
  transition: background 0.4s ease, color 0.4s ease;
  position: relative;
}

.projects-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 6rem) clamp(1.5rem, 5vw, 2rem) 0;
}

/* ── Section Header ──────────────────────────────────────── */
.proj-head {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.proj-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--proj-t3);
  margin-bottom: 0.85rem;
}

.proj-title {
  font-family: 'Inter', var(--font-sans);
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--proj-t1);
}

.proj-title em {
  font-style: normal;
  color: var(--proj-t3);
}

.proj-subtitle {
  margin-top: 1rem;
  font-family: 'Figtree', var(--font-sans);
  font-size: 1rem;
  color: var(--proj-t2);
  font-weight: 400;
  letter-spacing: -0.01em;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ── Scroll Stack Container ──────────────────────────────── */
.proj-stack {
  position: relative;
}

/* ── Project Item — Sticky Card ─────────────────────────── */
.proj-item {
  position: sticky;
  top: calc(var(--nav-h, 56px) + 20px + var(--i, 0) * 30px);
  margin-bottom: 40px;
  border-radius: 28px;
  background: var(--proj-card-bg);
  border: 1px solid var(--proj-sep);

  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  transition:
    transform 0.5s var(--ease-out),
    box-shadow 0.5s var(--ease-out),
    border-color 0.3s;
  will-change: transform;
  z-index: calc(10 + var(--i, 0));
  box-shadow:
    0 4px 20px rgba(0,0,0,0.15),
    0 20px 60px rgba(0,0,0,0.1);
  transform-origin: center top;
}

.proj-item:last-of-type {
  margin-bottom: 30vh;
}

.proj-item:hover {
  border-color: var(--proj-sep-h);
}

/* Reversed layout — swap visual/info order */
.proj-item.reverse .proj-visual {
  order: 2;
}
.proj-item.reverse .proj-info {
  order: 1;
}

/* ── Mockup Visual Panel ─────────────────────────────────── */
.proj-visual {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: rgba(10,10,14,0.9);
  border: 1px solid var(--proj-sep);
  transition:
    border-color 0.5s var(--ease-out),
    transform 0.5s var(--ease-out);
  cursor: pointer;
}

.proj-item:hover .proj-visual {
  border-color: var(--proj-sep-h);
}

/* Hover shine */
.proj-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg,
    rgba(255,255,255,0.03) 0%,
    transparent 45%,
    rgba(255,255,255,0.025) 100%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
  z-index: 2;
  border-radius: inherit;
}

.proj-item:hover .proj-visual::before {
  opacity: 1;
}

/* Glow accent */
.visual-glow {
  position: absolute;
  width: 60%;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0;
  transition: opacity 0.7s var(--ease-out);
  pointer-events: none;
  z-index: 0;
}

.proj-item:hover .visual-glow {
  opacity: 1;
}

/* Window chrome */
.visual-chrome {
  background: var(--proj-glass);
  border-bottom: 1px solid var(--proj-sep);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.chrome-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.chrome-bar {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--proj-glass);
  margin: 0 8px;
}

.chrome-icon {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--proj-glass);
  flex-shrink: 0;
}

/* Screen area */
.visual-screen {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg);
}

.mock-ui {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ── Mock UI Components ──────────────────────────────────── */
.mock-sidebar {
  width: 22%;
  height: 100%;
  background: rgba(255,255,255,0.03);
  border-right: 1px solid var(--proj-sep);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mock-sidebar-item {
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.08);
}

.mock-sidebar-item.active {
  background: rgba(255,255,255,0.18);
  width: 80%;
}

.mock-main {
  flex: 1;
  height: 100%;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-topbar {
  height: 22px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  border: 1px solid var(--proj-sep);
  flex-shrink: 0;
}

.mock-cards-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  flex-shrink: 0;
}

.mock-card-mini {
  height: 36px;
  border-radius: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--proj-sep);
}

.mock-table {
  flex: 1;
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--proj-sep);
  overflow: hidden;
}

.mock-table-row {
  height: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 6px;
}

.mock-table-row:last-child {
  border-bottom: none;
}

.mock-cell {
  height: 5px;
  border-radius: 2px;
  background: rgba(255,255,255,0.07);
}

.mock-cell.wide { flex: 2; }
.mock-cell.narrow { flex: 1; }
.mock-cell.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex: none;
}

/* Product grid mock */
.mock-product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 8px;
  height: 100%;
  align-content: start;
}

.mock-product-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--proj-sep);
  border-radius: 6px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mock-img-area {
  width: 100%;
  aspect-ratio: 1;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
}

.mock-name-line {
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.12);
}

.mock-price-line {
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.06);
  width: 60%;
}

/* Bill management mock */
.mock-bill-wrap {
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  height: 100%;
}

.mock-bill-header {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.mock-bill-stat {
  flex: 1;
  height: 38px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--proj-sep);
  border-radius: 6px;
}

.mock-bill-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 7px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--proj-sep);
  border-radius: 6px;
  flex-shrink: 0;
}

.mock-bill-icon {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
}

/* ── Project Info Panel ──────────────────────────────────── */
.proj-info {
  display: flex;
  flex-direction: column;
}

.proj-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--proj-t4);
  margin-bottom: 1rem;
}

.proj-name {
  font-family: 'Inter', var(--font-sans);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--proj-t1);
  line-height: 1.05;
  margin-bottom: 0.4rem;
}

.proj-type {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--proj-t3);
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.proj-type::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--proj-t4);
}

.proj-divider {
  width: 100%;
  height: 1px;
  background: var(--proj-sep);
  margin-bottom: 1.1rem;
}

.proj-desc {
  font-family: 'Figtree', var(--font-sans);
  font-size: 0.95rem;
  color: var(--proj-t2);
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: -0.005em;
  margin-bottom: 1.4rem;
}

/* Tags */
.proj-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 1.75rem;
}

.proj-tag {
  padding: 5px 11px;
  background: var(--proj-tag-bg);
  border: 1px solid var(--proj-sep);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--proj-t3);
  letter-spacing: 0.03em;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  cursor: default;
}

.proj-tag:hover {
  background: var(--proj-tag-bg-h);
  color: var(--proj-t2);
  border-color: var(--proj-sep-h);
}

/* CTAs */
.proj-ctas {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.proj-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 11px 20px;
  border-radius: 12px;
  border: 1px solid var(--proj-sep);
  font-family: 'Figtree', var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 0.25s var(--ease-out),
    border-color 0.25s,
    color 0.25s,
    transform 0.3s var(--ease-spring),
    box-shadow 0.3s var(--ease-out);
  user-select: none;
}

.proj-btn:hover {
  transform: translateY(-2px);
}

.proj-btn:active {
  transform: scale(0.96);
}

.proj-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  flex-shrink: 0;
}

.proj-btn-primary {
  background: var(--proj-accent);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.proj-btn-primary:hover {
  background: #1a8fff;
  box-shadow: 0 8px 28px rgba(10,132,255,0.45);
}

.proj-btn-ghost {
  background: var(--proj-btn-bg);
  border-color: var(--proj-sep);
  color: var(--proj-t2);
}

.proj-btn-ghost:hover {
  background: var(--proj-btn-bg-h);
  border-color: var(--proj-sep-h);
  color: var(--proj-t1);
}

/* ── View All Footer ─────────────────────────────────────── */
.proj-view-all {
  position: relative;
  z-index: 50;
  text-align: center;
  padding: clamp(4rem, 8vw, 6rem) 0 clamp(6rem, 12vw, 10rem);
  background: var(--bg);
}

.proj-view-all-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--proj-t4);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 820px) {
  .proj-item,
  .proj-item.reverse {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .proj-item.reverse .proj-visual,
  .proj-item.reverse .proj-info {
    order: unset;
  }

  .proj-title {
    font-size: 2.5rem;
  }
}

@media (max-width: 640px) {
  .proj-item {
    border-radius: 20px;
    padding: 1.25rem;
  }

  .proj-name {
    font-size: 1.5rem;
  }
}