/* ============================================================
   PROJECTS — detail hero + meta, and two explorer prototypes
   (Density Lanes + Constellation Field). Token-driven, theme-aware.
   ============================================================ */

/* ---------- Detail: header image hero ---------- */
.proj-hero {
  width: 100vw;
  position: relative;
  left: calc(50% - 50vw);
  height: 460px;
  overflow: hidden;
  background: var(--bg-stage);
  -webkit-user-select: none;
  user-select: none;
}
.proj-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.proj-hero__scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(19,19,19,0) 35%, var(--bg-stage) 100%),
    repeating-linear-gradient(to bottom, transparent 0, transparent 2px,
      rgba(229,230,232,0.04) 2px, rgba(229,230,232,0.04) 3px);
}
html[data-theme="light"] .proj-hero__scrim {
  background:
    linear-gradient(to bottom, rgba(242,241,239,0) 45%, var(--bg-stage) 100%);
}

/* ---------- Detail: meta strip ---------- */
.proj-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-5);
  margin-top: var(--s-2);
}
.proj-meta__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--fg-1);
  font-variant-numeric: tabular-nums;
}
.proj-meta__k {
  font-family: var(--font-tab);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.proj-meta__links {
  display: flex;
  gap: var(--s-2);
  margin-left: auto;
}
.proj-meta__links .home-btn--outline svg {
  width: 16px;
  height: 16px;
  vertical-align: middle;
  fill: currentColor;
}
.proj-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-top: var(--s-4);
}
.proj-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  color: var(--fg-2);
  border-radius: 2px;
}
.proj-lead {
  max-width: 70ch;
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  color: var(--fg-2);
  margin: 0 0 var(--s-6);
}

/* ============================================================
   PROTOTYPE A — DENSITY LANES
   ============================================================ */
.proj-lanes {
  display: flex;
  flex-direction: column;
  gap: var(--s-7);
}
.proj-lane__label {
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--font-tab);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: var(--ls-meta, 0.12em);
  text-transform: uppercase;
  color: var(--fg-1);
  padding-bottom: var(--s-2);
  margin-bottom: var(--s-3);
  border-bottom: 1px solid var(--border-1);
}
.proj-lane__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
}
.proj-lane__track {
  display: flex;
  align-items: flex-end;
  gap: var(--s-4);
  overflow-x: auto;
  padding-bottom: var(--s-3);
  scrollbar-width: thin;
}

/* Card — size scales with prominence via --scale (0..1) */
.proj-card {
  --h: calc(120px + var(--scale) * 150px);
  position: relative;
  flex: 0 0 auto;
  width: calc(var(--h) * 1.5);
  height: var(--h);
  overflow: hidden;
  text-decoration: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-1);
  transition: transform var(--t-base) var(--ease-broadcast),
              border-color var(--t-base) var(--ease-broadcast);
}
.proj-card:hover {
  transform: translateY(-4px);
  border-color: var(--da-yellow);
}
.proj-card__media {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform var(--t-slow) var(--ease-broadcast);
}
.proj-card:hover .proj-card__media { transform: scale(1.06); }
.proj-card__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(19,19,19,0.92) 0%, rgba(19,19,19,0.15) 55%, rgba(19,19,19,0) 100%);
}
.proj-card__body {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--s-3);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.proj-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(14px, calc(11px + var(--scale) * 9px), 22px);
  line-height: var(--lh-snug);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #fff;
}
.proj-card__meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(229,230,232,0.72);
}

/* ============================================================
   PROTOTYPE B — CONSTELLATION FIELD
   ============================================================ */
.proj-field-page {
  max-width: 100vw !important;
  width: 100vw !important;
  padding: 0 !important;
  margin: 0 !important;
}
.proj-field-page__inner {
  padding: 0 !important;
  margin: 0 !important;
  width: 100% !important;
}
.proj-field-page__meta {
  padding: var(--s-5) var(--s-5) 0 var(--s-5);
  max-width: 1100px;
  margin: 0 auto;
}

.proj-field {
  position: relative;
  width: 100vw;
  height: calc(100vh - 56px);
  left: 50%;
  transform: translateX(-50%);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 40%, rgba(247,187,43,0.05), transparent 60%),
    var(--bg-surface);
  border-top: 1px solid var(--border-1);
  border-bottom: 1px solid var(--border-1);
  cursor: grab;
  touch-action: none;
}
.proj-field.is-grabbing { cursor: grabbing; }
.proj-field__camera {
  position: absolute;
  inset: 0;
  transform-origin: 0 0;
}
.proj-field__hint {
  position: absolute;
  left: var(--s-4);
  bottom: var(--s-3);
  z-index: 5;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
}

.proj-node {
  position: absolute;
  top: 0; left: 0;
  border-radius: 50%;
  background-size: cover;
  background-position: center;
  border: 2px solid var(--da-yellow);
  box-shadow: 0 6px 22px rgba(0,0,0,0.45);
  cursor: pointer;
  will-change: transform;
  transition: opacity var(--t-base) var(--ease-broadcast),
              box-shadow var(--t-base) var(--ease-broadcast);
}
.proj-node--noimg {
  background:
    repeating-linear-gradient(45deg, var(--bg-raised) 0, var(--bg-raised) 6px, var(--bg-stage) 6px, var(--bg-stage) 12px);
}
.proj-node:hover {
  box-shadow: 0 0 0 3px var(--da-yellow), 0 8px 26px rgba(0,0,0,0.55);
  z-index: 10;
}
.proj-node.is-dim { opacity: 0.16; }
.proj-node__label {
  position: absolute;
  left: 50%;
  top: calc(100% + 6px);
  transform: translateX(-50%);
  white-space: nowrap;
  font-family: var(--font-tab);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-1);
  background: var(--bg-stage);
  border: 1px solid var(--border-1);
  padding: 2px 7px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-fast) var(--ease-broadcast);
}
.proj-node:hover .proj-node__label {
  opacity: 1;
  z-index: 11;
}

/* ---------- Buttons used as filter chips (override <button> defaults) ---------- */
button.finl-filter-tag {
  cursor: pointer;
  font-family: var(--font-tab);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .proj-hero { height: 300px; }
  .proj-meta__links { margin-left: 0; width: 100%; }
  .proj-field { height: 70vh; }
}

/* ============================================================
   DATA SCIENCE CASE STUDY ENHANCEMENTS
   ============================================================ */

/* Metric Cards Theme Fallback */
.ds-metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s-3, 1rem);
  margin: var(--s-5, 1.5rem) 0;
}

.ds-metric-card {
  background: var(--bg-surface, #1e1e1e);
  border: 1px solid var(--border-1, #2e2e2e);
  border-top: 3px solid var(--da-yellow, #ffd700);
  border-radius: 4px;
  padding: 16px 18px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.ds-metric-card:hover {
  transform: translateY(-2px);
  border-color: var(--da-yellow, #ffd700);
}

.ds-metric-value {
  font-family: var(--font-tab, sans-serif);
  font-size: var(--fs-h2, 28px);
  font-weight: 800;
  line-height: 1.1;
  color: var(--fg-1, #fff);
  letter-spacing: -0.02em;
}

.ds-metric-label {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-3, #888);
  margin-top: var(--s-2, 6px);
  font-weight: 600;
}

.ds-metric-delta {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  color: var(--da-yellow, #ffd700);
  margin-top: var(--s-1, 4px);
  opacity: 0.9;
}

/* Notebook / Dataframe Table Styling */
.art-body table,
.art-body table.dataframe {
  width: 100%;
  border-collapse: collapse;
  margin: var(--s-5, 1.5rem) 0;
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  color: var(--fg-2, #ccc);
  background: var(--bg-surface, #1e1e1e);
  border: 1px solid var(--border-1, #2e2e2e);
  border-radius: 4px;
  overflow-x: auto;
  display: block;
}

.art-body table th {
  background: var(--bg-stage, #141414);
  color: var(--fg-1, #fff);
  font-weight: 700;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--border-1, #333);
  letter-spacing: 0.04em;
}

.art-body table td {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-1, #282828);
}

.art-body table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Notebook Callout / Stat Boxes */
.ds-callout {
  padding: 14px 18px;
  margin: var(--s-4, 1.25rem) 0;
  border-left: 4px solid var(--da-yellow, #ffd700);
  background: rgba(255, 215, 0, 0.04);
  border-radius: 0 4px 4px 0;
  font-size: var(--fs-small, 13px);
  color: var(--fg-2, #ddd);
}

.ds-callout strong {
  color: var(--fg-1, #fff);
}