/* ============================================================
   category.css — Project category page (rauno.me/craft style)
   Adaptive: 2 projects → fit-width 2-col · 3+ → masonry 3-col
   ============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:         #ede9e3;
  --fg:         #1a1a1a;
  --fg-muted:   #6b6b6b;
  --fg-faint:   rgba(0,0,0,0.45);
  --card-bg:    #ffffff;
  --border:     rgba(0,0,0,0.08);
  --shadow:     0 2px 24px rgba(0,0,0,0.06);
  --shadow-hov: 0 6px 40px rgba(0,0,0,0.12);
  --font:       -apple-system, "Helvetica Neue", "PingFang SC", sans-serif;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }
img, video { display: block; max-width: 100%; }

/* ============ Header ============ */
.cat-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  gap: 16px;                                  /* prevent overlap when squeezed */
  background: rgba(237, 233, 227, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
@media (max-width: 600px) {
  .cat-header { padding: 14px 18px; gap: 10px; }
  .cat-name   { font-size: 13px; min-width: 0; overflow: hidden;
                text-overflow: ellipsis; white-space: nowrap; }
  /* .cat-main mobile padding handled in main's own block below */
  .cat-intro  { margin-bottom: 36px; }
  .cat-intro h2 { font-size: 28px; }
}

.cat-back {
  font-size: 13px;
  color: var(--fg-muted);
  transition: color 0.2s;
  letter-spacing: -0.005em;
}
.cat-back:hover { color: var(--fg); }

.cat-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.005em;
}

.cat-edit-toggle {
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  color: var(--fg);
  transition: background 0.2s;
}
.cat-edit-toggle:hover { background: #fff; }
.cat-edit-toggle.is-active {
  background: #111;
  color: #f59e0b;
  border-color: #111;
}

/* ============ Main ============
   Page gutter unified at 24px from 800px viewport upward.
   Mobile (≤ 600px) shrinks to 16px to maximize card width.
   All values are 8-grid compliant.
   =============================================================== */
.cat-main {
  width: 100%;
  padding: 104px 24px 80px;
  margin: 0 auto;
}
@media (max-width: 1024px) {
  .cat-main { padding: 96px 24px 56px; }
}
@media (max-width: 600px) {
  .cat-main { padding: 88px 16px 56px; }
}

.cat-intro {
  margin-bottom: 32px;
  max-width: 720px;
}
.cat-intro h2 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-bottom: 8px;
}
.cat-intro p {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ============ Layout: MASONRY (motion / 动效) ==========================
   True Pinterest packing — shortest-column-first placement via JS.
   Items are absolutely positioned; container.style.height set by JS.
   ====================================================================== */
.cat-grid[data-layout="masonry"] {
  width: 100%;
  position: relative;        /* anchor for absolute items */
  /* JS sets explicit height after layout */
}
/* Card — absolutely positioned by JS, 16px rounded corners clip image.
   Meta overlay at bottom hidden by default, fades in on hover. */
.cat-grid[data-layout="masonry"] .cat-item {
  position: absolute;                      /* JS sets left/top via transform */
  top: 0; left: 0;
  display: block;
  margin: 0;                               /* gap handled by JS positioning */
  cursor: default;
  background: #ffffff;
  border-radius: 16px;
  overflow: hidden;
  will-change: transform;
}
/* Add tile (+ 新建项目) also positioned absolutely in masonry layout */
.cat-grid[data-layout="masonry"] .cat-add-tile {
  position: absolute;
  top: 0; left: 0;
  margin: 0;
}
/* Cover fills entire card */
.cat-grid[data-layout="masonry"] .cat-cover {
  aspect-ratio: auto;
  cursor: default;
  background: #ffffff;
  border-radius: 0;
}
.cat-grid[data-layout="masonry"] .cat-cover img,
.cat-grid[data-layout="masonry"] .cat-cover video {
  height: auto;
  display: block;
  width: 100%;
}
/* Meta overlay — hidden by default, fades in on hover with gradient for legibility */
.cat-grid[data-layout="masonry"] .cat-meta {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
  padding: 24px 16px 14px;
  background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0) 100%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.cat-grid[data-layout="masonry"] .cat-item:hover .cat-meta { opacity: 1; }
.cat-grid[data-layout="masonry"] .cat-meta .cat-title {
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
.cat-grid[data-layout="masonry"] .cat-meta .cat-year {
  color: rgba(255,255,255,0.85);
  font-size: 12px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.4);
}
/* Edit mode: meta always visible so titles/years stay editable */
body.edit-mode .cat-grid[data-layout="masonry"] .cat-meta {
  opacity: 1;
  pointer-events: auto;
}
.cat-grid[data-layout="masonry"] .cat-title { flex: 1; min-width: 0; }
.cat-grid[data-layout="masonry"] .cat-year  { flex-shrink: 0; }

/* hover lift suppressed in masonry (subtle scale on cover only) */
.cat-grid[data-layout="masonry"] .cat-item:hover .cat-cover {
  transform: none;
}

/* Video cards: ▶ overlay shown until playing.
   .has-video added on covers with video media;
   .is-playing toggled by play/pause events. */
.cat-grid[data-layout="masonry"] .cat-cover.has-video {
  cursor: pointer;
  background: #1a1a1a;            /* dark backdrop before metadata loads */
}
.cat-grid[data-layout="masonry"] .cat-cover.has-video::after {
  content: '▶';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  line-height: 56px;
  text-align: center;
  font-size: 20px;
  color: #fff;
  background: rgba(0, 0, 0, 0.55);
  pointer-events: none;
  transition: background 0.2s ease, opacity 0.25s ease, transform 0.2s ease;
}
.cat-grid[data-layout="masonry"] .cat-item:hover .cat-cover.has-video::after {
  background: rgba(0, 0, 0, 0.78);
  transform: translate(-50%, -50%) scale(1.08);
}
.cat-grid[data-layout="masonry"] .cat-cover.has-video.is-playing::after {
  opacity: 0;
}

/* ============ Grid — unified 3-col layout for all categories ============
   8px baseline grid:
   · default       3 columns · gap 24px
   · ≤ 1024px      2 columns · gap 16px (small screen / zoomed browser)
   · cards scale via 1fr → adapt to container width
   ======================================================================== */
.cat-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 1024px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}

/* ============ Item card — cover on top, meta at bottom-left ============
   - Cover image fills upper portion, uniform aspect ratio for grid alignment
   - Title + year stacked at bottom-left, plain text (no card frame)
   - Subtle hover scale on cover for affordance
   ========================================================================== */
.cat-item {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: relative;            /* for absolute .cat-delete */
}

/* Cover — fills card width, fixed 4:3 ratio for uniform grid look.
   No border-radius per design spec: sharp corners across all pages. */
.cat-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #f0ece6;
  border-radius: 0;
  overflow: hidden;
  position: relative;
  display: block;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.cat-cover img,
.cat-cover video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #f0ece6;
}
.cat-item:hover .cat-cover {
  transform: scale(1.015);
}

/* Meta — BOTTOM, left-aligned. Title big, year small below. */
.cat-meta {
  padding: 14px 4px 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
}
.cat-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.005em;
  word-break: break-word;
}
.cat-year {
  font-size: 12px;
  color: var(--fg-faint);
  letter-spacing: 0;
}

/* ============ Empty state ============ */
.cat-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--fg-muted);
}
.cat-empty-icon { font-size: 48px; margin-bottom: 16px; }

/* ============ Edit mode ============ */
.cat-edit-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: #111;
  color: #fff;
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 12px;
  z-index: 200;
  max-width: calc(100vw - 32px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  line-height: 1.5;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}
.cat-edit-banner.is-visible {
  transform: translateX(-50%) translateY(0);
}

.cat-edit-tip { text-align: center; }
.cat-edit-hint { color: rgba(255,255,255,0.55); margin-left: 6px; }

.cat-edit-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}
.cat-edit-actions button {
  font-family: inherit;
  font-size: 12px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.15);
  padding: 7px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.cat-edit-actions button:hover {
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.3);
}
.cat-edit-actions button:first-child {
  background: #f59e0b;
  color: #111;
  border-color: #f59e0b;
  font-weight: 500;
}
.cat-edit-actions button:first-child:hover {
  background: #fbbf24;
  border-color: #fbbf24;
}
@media (max-width: 600px) {
  .cat-edit-banner { font-size: 11px; bottom: 16px; padding: 10px 14px; }
  .cat-edit-actions button { padding: 6px 10px; font-size: 11px; }
}
.cat-edit-banner.is-visible {
  transform: translateX(-50%) translateY(0);
}

body.edit-mode .cat-item { cursor: default; }
body.edit-mode .cat-cover {
  outline: 2px dashed transparent;
  outline-offset: -8px;
  cursor: context-menu;            /* hint: right-click affordance */
  transition: outline-color 0.2s;
}
body.edit-mode .cat-cover:hover {
  outline-color: rgba(245, 158, 11, 0.6);
}
body.edit-mode .cat-cover img,
body.edit-mode .cat-cover video {
  pointer-events: none;            /* click/right-click bubbles to .cat-cover */
}
body.edit-mode .cat-title {
  outline: 1px dashed transparent;
  outline-offset: 2px;
  padding: 2px 4px;
  margin: -2px -4px;
  border-radius: 4px;
  transition: outline-color 0.2s, background 0.2s;
}
body.edit-mode .cat-title:hover {
  outline-color: rgba(245, 158, 11, 0.6);
  background: rgba(245, 158, 11, 0.08);
}
body.edit-mode .cat-title[contenteditable="true"] {
  outline-color: #f59e0b;
  background: rgba(245, 158, 11, 0.12);
}

/* Year — same edit affordance as title */
body.edit-mode .cat-year {
  outline: 1px dashed transparent;
  outline-offset: 2px;
  padding: 2px 4px;
  margin: -2px -4px;
  cursor: text;
  transition: outline-color 0.2s, background 0.2s;
}
body.edit-mode .cat-year:hover {
  outline-color: rgba(245, 158, 11, 0.6);
  background: rgba(245, 158, 11, 0.08);
}
body.edit-mode .cat-year[contenteditable="true"] {
  outline-color: #f59e0b;
  background: rgba(245, 158, 11, 0.12);
}

/* Category-level editable fields (heading + description) */
body.edit-mode .cat-intro h2,
body.edit-mode .cat-intro p {
  outline: 1px dashed transparent;
  outline-offset: 4px;
  cursor: text;
  border-radius: 4px;
  transition: outline-color 0.2s, background 0.2s;
}
body.edit-mode .cat-intro h2:hover,
body.edit-mode .cat-intro p:hover {
  outline-color: rgba(245, 158, 11, 0.6);
  background: rgba(245, 158, 11, 0.05);
}
body.edit-mode .cat-intro [contenteditable="true"] {
  outline-color: #f59e0b !important;
  background: rgba(245, 158, 11, 0.10) !important;
}

/* ============ × Delete button on each card ============ */
.cat-delete {
  position: absolute;
  top: 8px; right: 8px;
  width: 32px; height: 32px;
  background: rgba(0, 0, 0, 0.78);
  color: #fff;
  border: none;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: none;
  z-index: 10;
  font-family: inherit;
  transition: background 0.15s, transform 0.15s;
}
.cat-delete:hover {
  background: #dc2626;
  transform: scale(1.08);
}
body.edit-mode .cat-delete { display: flex; align-items: center; justify-content: center; }

/* ============ + 新建项目 tile ============ */
.cat-add-tile {
  display: none;                       /* shown only in edit mode */
  flex-direction: column;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  background: rgba(0, 0, 0, 0.04);
  border: 2px dashed rgba(0, 0, 0, 0.18);
  cursor: pointer;
  font-family: inherit;
  color: #6b6b6b;
  gap: 6px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
body.edit-mode .cat-add-tile { display: flex; }
.cat-add-tile:hover {
  background: rgba(245, 158, 11, 0.06);
  border-color: rgba(245, 158, 11, 0.6);
  color: #b45309;
}
.cat-add-icon {
  font-size: 36px;
  line-height: 1;
  font-weight: 200;
}
.cat-add-label {
  font-size: 13px;
  letter-spacing: 0;
}

/* ============ Context menu ============ */
.cat-ctx-menu {
  position: fixed;
  z-index: 9999;
  background: #111;
  border: 1px solid #2a2a2a;
  border-radius: 6px;
  padding: 4px;
  display: none;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  font-family: inherit;
}
.cat-ctx-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  font-size: 12px;
  color: #fff;
  background: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
}
.cat-ctx-menu button:hover { background: #222; }
.cat-ctx-menu button.danger { color: #f87171; }