/* ─────────────────────────────────────────
   PORTFOLIO CARD BASE
───────────────────────────────────────── */
/* ── conic-gradient 旋转角度（CSS @property 让 animation 能插值）── */
@property --angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

/* 边框彩虹旋转动画 */
@keyframes border-spin {
  to { --angle: 360deg; }
}

.portfolio-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  opacity: 0;
  transform: translateY(60px);
  will-change: transform;

  /* 正常状态：透明 border + 两层 background 模拟普通边框，无布局偏移 */
  border: 2px solid transparent;
  background:
    /* 第1层（上）：纯色填充内容区，用 linear-gradient 包装确保多层语法正确 */
    linear-gradient(var(--bg-1), var(--bg-1)) padding-box,
    /* 第2层（下）：低调深色边框 */
    rgba(255,255,255,0.07) border-box;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  transition:
    box-shadow var(--dur-med) var(--ease-smooth);
}

.portfolio-card:hover {
  /* conic-gradient 沿边框周长分布完整彩虹光谱，旋转产生彩虹光扫效果
     第1层（上）：linear-gradient 纯色遮住内容区（padding-box）
     第2层（下）：conic-gradient 彩虹填满整个 border-box，只在边框区域露出 */
  animation: border-spin 2.5s linear infinite;
  background:
    linear-gradient(var(--bg-1), var(--bg-1)) padding-box,
    conic-gradient(
      from var(--angle),
      hsl(0,   100%, 65%),
      hsl(60,  100%, 65%),
      hsl(120, 100%, 65%),
      hsl(180, 100%, 65%),
      hsl(240, 100%, 65%),
      hsl(300, 100%, 65%),
      hsl(360, 100%, 65%)
    ) border-box;
  box-shadow:
    0 0 18px 4px rgba(0, 200, 255, 0.25),
    0 20px 50px rgba(0, 0, 0, 0.45);
}




/* ─── Grid sizes ─── */
.card--featured  { grid-column: span 6; }
.card--large     { grid-column: span 4; }
.card--standard  { grid-column: span 4; }
.card--video     { grid-column: span 4; }

@media (max-width: 1100px) {
  .card--featured { grid-column: span 12; }
  .card--large    { grid-column: span 6; }
  .card--standard { grid-column: span 6; }
  .card--video    { grid-column: span 6; }
}

@media (max-width: 700px) {
  .card--featured,
  .card--large,
  .card--standard,
  .card--video    { grid-column: span 12; }
}

/* ─── Media wrapper ─── */
.card__media-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--bg-2);
  aspect-ratio: 16/9;
  contain: strict;
}

.card--featured .card__media-wrap {
  aspect-ratio: 16/9;
}

.card__media-wrap img,
.card__media-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-expo),
              filter 0.4s;
}

.portfolio-card:hover .card__media-wrap img,
.portfolio-card:hover .card__media-wrap video {
  transform: scale(1.07);
  filter: brightness(1.05) saturate(1.1);
}

/* Media overlay gradient */
.card__media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 40%,
    rgba(7, 7, 14, 0.65) 100%
  );
  opacity: 0;
  transition: opacity var(--dur-med);
  z-index: 1;
}

.portfolio-card:hover .card__media-overlay {
  opacity: 1;
}

/* Media placeholder */
.card__media-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-2), var(--purple-dim));
}

.card__media-placeholder svg {
  width: 40px;
  height: 40px;
  opacity: 0.2;
  stroke: var(--cyan);
}

/* ─── Mosaic preview ─── */
.card__mosaic {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  overflow: hidden;
  align-items: stretch;
}

/* 2 images → 1 row */
.card__mosaic[data-count="2"] {
  grid-template-rows: 1fr;
}

/* 3 images → 2 rows (last image spans full width via .img--span) */
.card__mosaic[data-count="3"] {
  grid-template-rows: 1fr 1fr;
}

/* 4 images → strict 2×2 */
.card__mosaic[data-count="4"] {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.card__mosaic img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  object-position: center;
  transition: transform 0.6s var(--ease-expo), filter 0.4s;
}

.portfolio-card:hover .card__mosaic img {
  transform: scale(1.07);
  filter: brightness(1.05) saturate(1.1);
}

/* Only 1 image: full width */
.card__mosaic img:only-child {
  grid-column: 1 / -1;
  grid-row: 1 / -1;
}

/* 3 images: last one spans full width */
.card__mosaic img.img--span {
  grid-column: 1 / -1;
}

.card__mosaic-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  z-index: 2;
  padding: 3px 8px;
  background: rgba(0, 0, 0, 0.65);
  border: 1px solid rgba(0,212,255,0.35);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
  backdrop-filter: blur(4px);
  pointer-events: none;
}

/* ─── Card body ─── */
.card__body {
  padding: 18px 20px 20px;
}

.card__tags-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  padding: 3px 9px;
  border-radius: 4px;
  letter-spacing: 0.06em;
}

.tag--category {
  background: var(--cyan-dim);
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.25);
}

.tag--featured {
  background: rgba(255, 45, 120, 0.12);
  color: var(--magenta);
  border: 1px solid rgba(255, 45, 120, 0.3);
}

.tag--tech {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.card__title {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  transition: color var(--dur-fast), text-shadow var(--dur-fast);
}

.portfolio-card:hover .card__title {
  color: var(--cyan);
  text-shadow: var(--glow-text);
}

.card__desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

/* ─── Card links (slide up on hover) ─── */
.card__links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  transform: translateY(12px);
  opacity: 0;
  transition:
    transform var(--dur-med) var(--ease-expo),
    opacity var(--dur-fast);
  transition-delay: 0.04s;
}

.portfolio-card:hover .card__links {
  transform: translateY(0);
  opacity: 1;
}

.card__link-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 5px 12px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 4px;
  background: var(--cyan-dim);
  transition: background var(--dur-fast), box-shadow var(--dur-fast);
}

.card__link-btn:hover {
  background: rgba(0, 212, 255, 0.18);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
}

.card__link-btn svg {
  width: 11px;
  height: 11px;
  stroke: currentColor;
}

/* ─── Live Demo badge (always visible on card) ─── */
.card__live-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: #07070e;
  background: var(--cyan);
  padding: 5px 12px;
  border-radius: 100px;
  text-decoration: none;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.6);
  transition: background var(--dur-fast), box-shadow var(--dur-fast), transform var(--dur-fast);
}

.card__live-btn::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #07070e;
  animation: livePulse 1.6s ease-in-out infinite;
  flex-shrink: 0;
}

.card__live-btn:hover {
  background: #fff;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.9);
  transform: scale(1.05);
}

@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

/* ═══════════════════════════════════════
   IMAGE VIEWER OVERLAY
═══════════════════════════════════════ */
#img-viewer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(5, 5, 14, 0.88);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}

#img-viewer.is-open {
  display: flex;
}

#img-viewer__panel {
  position: relative;
  background: var(--surface);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  width: min(1200px, calc(100vw - 48px));
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#img-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  flex-shrink: 0;
}

#img-viewer__title {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

#img-viewer__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.12);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--dur-fast);
  flex-shrink: 0;
}

#img-viewer__close:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}

#img-viewer__grid {
  overflow-y: auto;
  padding: 16px;
}

/* === 1 张：居中放大，垂直居中 === */
#img-viewer__grid[data-layout="single"] {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
}

#img-viewer__grid[data-layout="single"] .viewer-item {
  width: min(100%, 800px);
}

#img-viewer__grid[data-layout="single"] .viewer-item img,
#img-viewer__grid[data-layout="single"] .viewer-item video {
  max-height: 75vh;
}

/* === 2 张：2列居中 === */
#img-viewer__grid[data-layout="two"] {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  align-items: start;
  max-width: min(100%, 840px);
  margin: 0 auto;
}

/* === 3 张：3列铺满 === */
#img-viewer__grid[data-layout="three"] {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: start;
}

/* === 4+ 张：网格（从左到右排列，默认）=== */
#img-viewer__grid[data-layout="masonry"] {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: start;
}

#img-viewer__grid[data-layout="masonry"] .viewer-item {
  margin-bottom: 0;
}

/* === 4+ 张：瀑布流（从上到下排列）=== */
#img-viewer__grid[data-layout="masonry-columns"] {
  columns: 3 220px;
  column-gap: 12px;
}

#img-viewer__grid[data-layout="masonry-columns"] .viewer-item {
  margin-bottom: 12px;
}

.viewer-item {
  break-inside: avoid;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(0,0,0,0.2);
  transition: box-shadow 0.3s;
}

.viewer-item:hover {
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}

.viewer-item img,
.viewer-item video {
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
  display: block;
  transition: transform 0.3s var(--ease-expo);
  cursor: zoom-in;
  background: #000;
}

.viewer-item video {
  cursor: default;
}

.viewer-item:hover img {
  transform: scale(1.02);
}

/* Compare items in viewer: disable hover zoom to keep clip-path aligned */
.viewer-item--compare:hover .compare-slider__before,
.viewer-item--compare:hover .compare-slider__after {
  transform: none;
}

.viewer-item__caption {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  padding: 8px 12px;
  background: rgba(0,0,0,0.35);
  border-top: 1px solid rgba(255,255,255,0.05);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Compare slider inside card: fill the media-wrap */
.card__media-wrap .compare-slider {
  position: absolute;
  inset: 0;
  aspect-ratio: unset;
  width: 100%;
  height: 100%;
  border-radius: 0;
}

/* Compare cards: disable hover zoom to keep clip-path aligned */
.card--compare:hover .card__media-wrap img,
.card--compare:hover .card__media-wrap video {
  transform: none;
  filter: none;
}

/* ═══════════════════════════════════════
   COMPARE SLIDER
═══════════════════════════════════════ */
.compare-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  cursor: col-resize;
  user-select: none;
  border-radius: 6px 6px 0 0;
}

.compare-slider__after,
.compare-slider__before {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  pointer-events: none;
}

/* before: clipped by inline clip-path set from JS */
.compare-slider__before {
  clip-path: inset(0 50% 0 0);
  z-index: 1;
}

.compare-slider__after {
  z-index: 0;
}

/* Divider line */
.compare-slider__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: #fff;
  z-index: 3;
  transform: translateX(-50%);
  pointer-events: none;
  box-shadow: 0 0 8px rgba(0,0,0,0.6);
}

/* Handle knob */
.compare-slider__handle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 36px;
  height: 36px;
  background: #fff;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.5);
  cursor: col-resize;
}

.compare-slider__handle::before,
.compare-slider__handle::after {
  content: '';
  border: 5px solid transparent;
  border-top: 0;
  border-bottom: 0;
  flex-shrink: 0;
}
.compare-slider__handle::before {
  border-right-color: #333;
  margin-right: 3px;
}
.compare-slider__handle::after {
  border-left-color: #333;
}

/* Labels (before/after) */
.compare-slider__label {
  position: absolute;
  top: 10px;
  z-index: 5;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: #fff;
  background: rgba(0,0,0,0.55);
  padding: 3px 8px;
  border-radius: 4px;
  pointer-events: none;
}

.compare-slider__label--before { left: 10px; }
.compare-slider__label--after  { right: 10px; }

/* Compare item in viewer fills full column */
.viewer-item--compare {
  column-span: all;      /* columns 布局 */
  grid-column: 1 / -1;  /* grid 布局 */
}

.viewer-item--compare .compare-slider {
  border-radius: 6px 6px 0 0;
}

/* ─── Video card special ─── */
.card--video .card__media-wrap {
  cursor: pointer;
}

.card--video .card__media-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  pointer-events: none;
}

.play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: rgba(0, 212, 255, 0.15);
  border: 2px solid rgba(0, 212, 255, 0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background var(--dur-fast), transform var(--dur-fast);
  pointer-events: none;
}

.play-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--cyan);
  margin-left: 3px;
}

.portfolio-card:hover .play-icon {
  background: rgba(0, 212, 255, 0.28);
  transform: translate(-50%, -50%) scale(1.1);
}