/* ─────────────────────────────────────────────────────────────
   Projects page · VoltAgent-inspired dark aesthetic
   Dark canvas · single electric-green accent · hairline cards
   ───────────────────────────────────────────────────────────── */

body {
  font-family: var(--font-sans);
  background-color: var(--c-canvas);
  color: var(--c-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.content {
  display: block;
  margin: 0 auto;
  max-width: var(--container-max);
  padding: var(--sp-8) var(--gutter-x) var(--sp-16);
}
main { width: 100%; }

h1, .page-title {
  font-family: var(--font-sans);
  font-size: var(--fs-display-xl);
  font-weight: 600;
  line-height: var(--lh-display-xl);
  letter-spacing: var(--ls-display-tight);
  color: var(--c-ink-strong);
  text-align: center;
  margin: var(--sp-10) 0 var(--sp-4);
  position: relative;
  display: block;
}
h1::after, .page-title::after { content: none; }

.page-subtitle {
  text-align: center;
  font-size: var(--fs-body-lg);
  color: var(--c-body);
  margin: 0 auto var(--sp-10);
  max-width: 640px;
  line-height: var(--lh-body);
}

.page-eyebrow {
  display: block;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--ls-eyebrow);
  color: var(--c-primary);
  margin-top: var(--sp-8);
}

/* ─── Filter bar ─── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
  margin: 0 auto var(--sp-10);
  padding: 0;
  max-width: 1100px;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 14px;
  border: var(--bw-hair) solid var(--c-hairline);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--c-body);
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
  user-select: none;
}
.filter-chip i { font-size: 16px; opacity: 0.7; transition: opacity var(--dur-fast); }
.filter-chip:hover { color: var(--c-ink); border-color: var(--c-hairline-strong); }
.filter-chip:hover i { opacity: 1; }
.filter-chip.active {
  background: var(--c-primary);
  color: var(--c-on-primary);
  border-color: var(--c-primary);
  font-weight: 600;
}
.filter-chip.active i { opacity: 1; }
.filter-chip:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 3px; }

/* ─── Project grid ─── */
.project_list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--sp-4);
  margin: 0 auto;
  padding: 0;
  max-width: var(--container-max);
  /* Prevent a row from stretching when one card expands via .active */
  align-items: start;
  grid-auto-rows: min-content;
}

.project_list .empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--sp-12) var(--sp-5);
  color: var(--c-mute);
  border: var(--bw-hair) dashed var(--c-hairline);
  border-radius: var(--r-md);
  background: var(--c-canvas-soft);
}
.project_list .empty-state i { font-size: 40px; opacity: 0.4; margin-bottom: var(--sp-3); }
.project_list .empty-state p { font-size: var(--fs-body-sm); margin: 0; }

/* ─── Project card ─── */
.project {
  position: relative;
  align-self: start;                    /* never stretch to row height */
  display: flex;
  flex-direction: column;
  background-color: rgba(20, 22, 26, 0.55);
  backdrop-filter: blur(14px) saturate(1.05);
  -webkit-backdrop-filter: blur(14px) saturate(1.05);
  border: var(--bw-hair) solid var(--c-hairline);
  border-radius: var(--r-md);
  overflow: hidden;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  animation: card-in var(--dur-slow) var(--ease-out) forwards;
  animation-delay: var(--stagger, 0ms);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.28);
  transition: border-color 0.35s var(--ease-out),
              transform 0.4s var(--ease-out),
              background-color 0.35s var(--ease-out),
              box-shadow 0.35s var(--ease-out);
}

/* Top accent line that ignites on hover */
.project::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-primary), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease-out);
  z-index: 4;
  pointer-events: none;
}

@keyframes card-in {
  to { opacity: 1; transform: translateY(0); }
}

.project.hidden { display: none; }

.project:hover {
  border-color: rgba(0, 217, 146, 0.45);
  background-color: rgba(28, 32, 38, 0.72);
  transform: translateY(-6px) scale(1.012);
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.45),
    0 0 32px rgba(0, 217, 146, 0.14);
  z-index: 5;
}
.project:hover::before { opacity: 1; }

/* Dim non-hovered siblings while one card is hovered */
.project_list:has(.project:hover) .project:not(:hover):not(.active) {
  filter: blur(1.5px);
  opacity: 0.55;
  transform: scale(0.985);
  transition: filter 0.35s var(--ease-out),
              opacity 0.35s var(--ease-out),
              transform 0.35s var(--ease-out);
}

.project:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 3px; }

.project.featured {
  border-color: var(--c-primary);
  box-shadow:
    inset 0 0 0 1px rgba(0, 217, 146, 0.22),
    0 6px 24px rgba(0, 0, 0, 0.32);
}
.project.featured:hover {
  border-color: var(--c-primary-soft);
  box-shadow:
    inset 0 0 0 1px rgba(0, 217, 146, 0.32),
    0 22px 48px rgba(0, 0, 0, 0.5),
    0 0 36px rgba(0, 217, 146, 0.22);
}

/* ─── Cover image ─── */
.project .project_image {
  width: 100%;
  height: 160px;
  object-fit: contain;
  padding: var(--sp-8);
  background-color: var(--c-surface-1);
  border-bottom: var(--bw-hair) solid var(--c-hairline);
  display: block;
  transition: transform var(--dur-slow) var(--ease-out);
}
.project:hover .project_image { transform: scale(1.03); }

.project_list .project .project_image.category-web {
  background: radial-gradient(circle at 50% 35%, rgba(74, 108, 247, 0.16), transparent 60%), var(--c-surface-1);
}
.project_list .project .project_image.category-ai {
  background: radial-gradient(circle at 50% 35%, rgba(0, 217, 146, 0.18), transparent 60%), var(--c-surface-1);
}
.project_list .project .project_image.category-health {
  background: radial-gradient(circle at 50% 35%, rgba(16, 185, 129, 0.16), transparent 60%), var(--c-surface-1);
}
.project_list .project .project_image.category-iot {
  background: radial-gradient(circle at 50% 35%, rgba(245, 158, 11, 0.18), transparent 60%), var(--c-surface-1);
}
.project_list .project .project_image.category-code {
  background: radial-gradient(circle at 50% 35%, rgba(148, 163, 184, 0.14), transparent 60%), var(--c-surface-1);
}
.project_list .project .project_image.category-web3 {
  background: radial-gradient(circle at 50% 35%, rgba(245, 158, 11, 0.18), transparent 60%), var(--c-surface-1);
}

/* ─── Year pill ─── */
.project .year {
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
  z-index: 3;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--c-ink);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: var(--bw-hair) solid var(--c-hairline);
  border-radius: var(--r-xs);
}

/* ─── Featured ribbon ─── */
.project .featured-ribbon {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--c-on-primary);
  background: var(--c-primary);
  border-radius: var(--r-xs);
}
.project .featured-ribbon i { font-size: 12px; }

/* ─── Award ribbon ─── */
.project .award-ribbon {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: calc(100% - 90px);
  padding: 3px 10px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--c-amber);
  background: var(--c-canvas);
  border: var(--bw-hair) solid rgba(245, 158, 11, 0.5);
  border-radius: var(--r-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.project .award-ribbon i { font-size: 12px; color: var(--c-amber); }
.project.featured .award-ribbon { top: calc(var(--sp-3) + 28px); }

/* ─── Category badge ─── */
.project .category-badge {
  position: absolute;
  top: 140px;
  right: var(--sp-3);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-body);
  background: var(--c-canvas);
  border: var(--bw-hair) solid var(--c-hairline);
  border-radius: var(--r-xs);
}
.project .category-badge i { font-size: 12px; }
.project .category-badge.ai     { color: var(--c-primary); }
.project .category-badge.web3   { color: var(--c-amber); }
.project .category-badge.iot    { color: var(--c-amber); }
.project .category-badge.web    { color: #8aa1ff; }
.project .category-badge.health { color: #4ade80; }
.project .category-badge.code   { color: var(--c-mute); }

/* ─── Card body ─── */
.project .project-body {
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  flex-grow: 1;
}
.project .title-wrap { display: flex; flex-direction: column; gap: var(--sp-1); margin-top: var(--sp-1); }
.project .title {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--c-ink-strong);
  font-size: var(--fs-display-sm);
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin: 0;
  transition: color var(--dur-fast);
}
.project:hover .title { color: var(--c-primary); }
.project .tagline {
  font-size: var(--fs-body-sm);
  color: var(--c-body);
  margin: 0;
  font-weight: 400;
  line-height: 1.45;
}

/* ─── Tech tag chips ─── */
.project .tag_list { display: flex; flex-wrap: wrap; gap: 6px; }
.project .tag {
  display: inline-block;
  background: transparent;
  color: var(--c-body);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  padding: 3px 8px;
  border-radius: var(--r-xs);
  border: var(--bw-hair) solid var(--c-hairline);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.project:hover .tag { color: var(--c-ink); border-color: var(--c-hairline-strong); }
.project .tag-more { color: var(--c-mute); cursor: help; }

/* ─── Metric pills ─── */
.project .metric-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: var(--sp-2);
}
.project .metric-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--c-primary-soft);
  background: rgba(0, 217, 146, 0.06);
  border: var(--bw-hair) solid rgba(0, 217, 146, 0.22);
  border-radius: var(--r-xs);
}
.project .metric-pill i { display: none; }
.project .metric-pill::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-primary);
  box-shadow: 0 0 6px rgba(0, 217, 146, 0.6);
  flex-shrink: 0;
}

/* ─── Collapsible details ─── */
.collapsible-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--dur-slow) var(--ease-out),
              opacity var(--dur-med) var(--ease-out),
              margin-top var(--dur-med);
  margin-top: 0;
}
.project.active .collapsible-content {
  max-height: 1200px;
  opacity: 1;
  margin-top: var(--sp-2);
}
.project .description {
  color: var(--c-body);
  font-size: var(--fs-body-sm);
  line-height: var(--lh-body);
  margin: 0 0 var(--sp-4);
  transform: translateY(6px);
  opacity: 0;
  transition: transform var(--dur-med), opacity var(--dur-med);
}
.project.active .description { transform: translateY(0); opacity: 1; }
.project .tech-stack {
  padding: var(--sp-3) 0;
  color: var(--c-mute);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  border-top: var(--bw-hair) dashed var(--c-hairline);
  word-break: break-word;
}
.project .tech-stack span {
  color: var(--c-primary);
  font-weight: 500;
  margin-right: var(--sp-1);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── Buttons ─── */
.project .repo-link { display: flex; flex-wrap: wrap; gap: var(--sp-2); padding-top: var(--sp-3); }
.project .repo-link a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: var(--fs-body-sm);
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  border: var(--bw-hair) solid var(--c-hairline);
  background: transparent;
  color: var(--c-ink);
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast);
}
.project .repo-link a i { font-size: 15px; }
.project .repo-link a.repo-button:hover { background: var(--c-surface-2); border-color: var(--c-hairline-strong); }
.project .repo-link a.live-button { background: var(--c-primary); color: var(--c-on-primary); border-color: var(--c-primary); }
.project .repo-link a.live-button:hover { background: var(--c-primary-soft); border-color: var(--c-primary-soft); }

/* ─── Expand chevron ─── */
.project::after {
  content: 'expand_more';
  font-family: 'Material Icons';
  position: absolute;
  bottom: var(--sp-3);
  right: var(--sp-3);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--c-mute);
  border: var(--bw-hair) solid var(--c-hairline);
  border-radius: 50%;
  font-size: 16px;
  transition: transform var(--dur-fast), color var(--dur-fast),
              border-color var(--dur-fast), background var(--dur-fast);
  pointer-events: none;
}
.project:hover::after { color: var(--c-ink); border-color: var(--c-hairline-strong); }
.project.active::after {
  content: 'expand_less';
  background: var(--c-primary);
  color: var(--c-on-primary);
  border-color: var(--c-primary);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .content { padding: var(--sp-6) var(--gutter-x) var(--sp-10); }
  h1, .page-title { font-size: var(--fs-display-xl); margin: var(--sp-8) 0 var(--sp-3); }
  .page-subtitle { font-size: var(--fs-body); margin-bottom: var(--sp-8); }
  .project_list { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}
@media (max-width: 600px) {
  .project_list { grid-template-columns: 1fr; }
  .project .project_image { height: 140px; padding: var(--sp-6); }
  .project .category-badge { top: 120px; }
  .project .project-body { padding: var(--sp-5); }
}
@media (max-width: 480px) {
  .project .title { font-size: 18px; }
  .filter-chip span { display: none; }
  .filter-chip { padding: 6px 10px; }
}