:root {
  --bg: #1b1b1b; --bg2: #262626; --bg3: #303030; --line: #3a3a3a;
  --fg: #e8e8e8; --fg2: #a8a8a8; --fg3: #6f6f6f;
  --accent: #2f8ff5; --like: #ff4d6d; --ok: #3ccf7a; --danger: #ff6b6b;
  --radius: 8px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--fg);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; overscroll-behavior: none; touch-action: manipulation;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; }
[hidden] { display: none !important; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 6px;
  background: var(--bg3); border: 1px solid var(--line); color: var(--fg); white-space: nowrap;
}
.btn:hover { background: #3a3a3a; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: #1f7fe6; }
.btn.danger { color: var(--danger); }
.btn.small { padding: 4px 9px; font-size: 13px; }
.btn.active { background: #fff; color: #111; border-color: #fff; }
.btn:disabled { opacity: .5; cursor: default; }
.icon { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 12px;
  height: 56px; padding: 0 16px; background: #111; border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 18px; font-weight: 600; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; min-width: 0; }
.topbar .sub { color: var(--fg2); font-size: 13px; white-space: nowrap; }
.topbar .spacer { flex: 1; }

/* ---- grid ---- */
.grid {
  display: grid; gap: 6px; padding: 6px;
  grid-template-columns: repeat(auto-fill, minmax(var(--cell, 220px), 1fr));
}
.cell {
  position: relative; background: var(--bg2); border-radius: 4px; aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center; overflow: hidden; cursor: pointer;
  outline: 2px solid transparent; outline-offset: -2px;
}
.cell:hover { outline-color: #555; }
.cell.selected { outline-color: var(--accent); }
.cell img { max-width: 92%; max-height: 92%; object-fit: contain; display: block; }
.cell .heart {
  position: absolute; right: 8px; bottom: 8px; width: 36px; height: 36px; border-radius: 50%;
  background: rgba(0,0,0,.55); display: flex; align-items: center; justify-content: center; color: #fff;
}
.cell .heart .icon { width: 20px; height: 20px; }
.cell .heart.on { color: var(--like); }
.cell .heart.on .icon { fill: var(--like); }
.cell .name { position: absolute; left: 8px; bottom: 8px; font-size: 11px; color: var(--fg2); background: rgba(0,0,0,.55); padding: 2px 6px; border-radius: 3px; max-width: 60%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cell .note { position: absolute; left: 8px; top: 8px; background: rgba(0,0,0,.55); border-radius: 3px; padding: 3px; color: #fff; }
.cell .note .icon { width: 14px; height: 14px; }

/* ---- viewer ---- */
.viewer { position: fixed; inset: 0; z-index: 100; background: #121212; display: flex; flex-direction: column; height: 100vh; height: 100dvh; padding-bottom: env(safe-area-inset-bottom); }
.viewer .stage { flex: 1; position: relative; display: flex; align-items: center; justify-content: center; min-height: 0; touch-action: none; overflow: hidden; }
.viewer .stage img { max-width: 100%; max-height: 100%; object-fit: contain; user-select: none; -webkit-user-drag: none; flex: none; }
.viewer .stage.zoomed img { max-width: none; max-height: none; }
.viewer .stage.zoomed img { cursor: grab; }
.viewer .stage.zoomed .nav { display: none; }
.viewer .zoomhint { position: absolute; top: 12px; left: 50%; transform: translateX(-50%); background: rgba(0,0,0,.6); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 999px; pointer-events: none; opacity: 0; transition: opacity .2s; }
.viewer .zoomhint.show { opacity: 1; }
.viewer .nav {
  position: absolute; top: 0; bottom: 0; width: 18%; max-width: 120px; display: flex; align-items: center; justify-content: center; color: #fff; opacity: 0; transition: opacity .15s;
}
.viewer .nav:hover { opacity: 1; }
.viewer .nav.prev { left: 0; } .viewer .nav.next { right: 0; }
.viewer .nav .icon { width: 36px; height: 36px; filter: drop-shadow(0 0 4px #000); }
.viewer .bar { display: flex; align-items: center; gap: 12px; padding: 8px 14px; background: #171717; border-top: 1px solid var(--line); }
.viewer .bar .counter { color: var(--fg2); white-space: nowrap; }
.viewer .bar .fname { color: var(--fg3); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer .bigheart { height: 48px; padding: 0 18px 0 14px; border-radius: 999px; display: flex; align-items: center; gap: 8px; background: var(--bg3); border: 1px solid #444; font-weight: 600; transition: background .15s, border-color .15s, color .15s; }
.viewer .bigheart .icon { width: 26px; height: 26px; flex: none; }
.viewer .bigheart:hover { border-color: var(--like); }
.viewer .bigheart.on { color: #fff; background: linear-gradient(135deg, #ff4d6d, #ff2d55); border-color: transparent; box-shadow: 0 4px 18px rgba(255,45,85,.45); }
.viewer .bigheart.on .icon { fill: #fff; stroke: #fff; }
.viewer .bigheart .lbl-on, .viewer .bigheart.on .lbl-off { display: none; }
.viewer .bigheart.on .lbl-on { display: inline; }

/* ---- like animations ---- */
@keyframes heartpop { 0% { transform: scale(1); } 30% { transform: scale(1.45); } 55% { transform: scale(.9); } 75% { transform: scale(1.15); } 100% { transform: scale(1); } }
@keyframes ringburst { 0% { transform: scale(.4); opacity: .9; } 100% { transform: scale(2.2); opacity: 0; } }
@keyframes flashheart { 0% { transform: scale(.3); opacity: 0; } 20% { transform: scale(1.15); opacity: 1; } 45% { transform: scale(1); opacity: 1; } 100% { transform: scale(1.1); opacity: 0; } }
.pop .icon, .heart.pop, .bigheart.pop .icon { animation: heartpop .5s cubic-bezier(.2,.8,.3,1.2); }
.ring { position: absolute; left: 50%; top: 50%; width: 40px; height: 40px; margin: -20px 0 0 -20px; border-radius: 50%; border: 3px solid var(--like); pointer-events: none; animation: ringburst .55s ease-out forwards; }
.cell .heart, .viewer .bigheart { position: relative; overflow: visible; }
.flashheart { position: absolute; left: 50%; top: 50%; width: 120px; height: 120px; margin: -60px 0 0 -60px; pointer-events: none; color: #fff; filter: drop-shadow(0 6px 24px rgba(0,0,0,.6)); animation: flashheart .9s ease-out forwards; z-index: 2; }
.flashheart svg { width: 100%; height: 100%; fill: #ff2d55; stroke: #fff; stroke-width: 1; }
.flashheart.off svg { fill: none; stroke: #fff; stroke-width: 1.5; }

/* grid heart: bigger, red when on */
.cell .heart { width: 40px; height: 40px; background: rgba(0,0,0,.5); transition: transform .15s, background .15s; }
.cell .heart .icon { width: 22px; height: 22px; }
.cell .heart:active { transform: scale(.9); }
.cell .heart.on { background: #ff2d55; color: #fff; box-shadow: 0 2px 12px rgba(255,45,85,.55); }
.cell .heart.on .icon { fill: #fff; stroke: #fff; }
.cell.liked { outline-color: rgba(255,45,85,.55); }
.viewer .comment { flex: 1; max-width: 420px; font-size: 16px; background: var(--bg2); border: 1px solid var(--line); border-radius: 6px; padding: 7px 10px; outline: none; }
.viewer .comment:focus { border-color: var(--accent); }
.viewer .bar-close { display: none; width: 44px; height: 44px; border-radius: 50%; background: var(--bg3); align-items: center; justify-content: center; margin-left: auto; }
.viewer .strip { display: flex; gap: 4px; padding: 6px 10px; overflow-x: auto; background: #111; scrollbar-width: thin; }
.viewer .strip img { height: 56px; width: 56px; object-fit: cover; border-radius: 3px; opacity: .55; cursor: pointer; flex: none; outline: 2px solid transparent; }
.viewer .strip img.cur { opacity: 1; outline-color: #fff; }
.viewer .strip img.liked { opacity: .9; outline-color: var(--like); }
.viewer .strip img.cur.liked { outline-color: #fff; box-shadow: 0 0 0 4px var(--like); }
.viewer .close { position: absolute; top: 10px; right: 12px; z-index: 2; width: 40px; height: 40px; border-radius: 50%; background: rgba(0,0,0,.5); color: #fff; display: flex; align-items: center; justify-content: center; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: #fff; color: #111; padding: 10px 16px; border-radius: 8px; z-index: 200; box-shadow: 0 6px 24px rgba(0,0,0,.4); }
.empty { padding: 60px 20px; text-align: center; color: var(--fg2); }

.pill { display: inline-flex; align-items: center; gap: 6px; padding: 2px 8px; border-radius: 999px; background: var(--bg3); font-size: 12px; }
.chip { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; font-size: 11px; font-weight: 700; color: #111; }

@media (max-width: 640px) {
  .topbar { padding: 0 10px; gap: 8px; height: 50px; }
  .topbar h1 { font-size: 15px; }
  .topbar .sub { display: none; }
  #doneBtn span { display: none; }
  .grid { gap: 3px; padding: 3px; }
  .cell .heart { width: 30px; height: 30px; right: 4px; bottom: 4px; }
  .cell .name { font-size: 10px; left: 4px; bottom: 4px; padding: 1px 4px; }
  /* phone: small always-visible arrows at the edges (not full-height, so taps on the photo stay free) */
  .viewer .nav { top: 50%; bottom: auto; width: 40px; height: 40px; max-width: none; margin-top: -20px; border-radius: 50%; background: rgba(0,0,0,.38); opacity: .75; }
  .viewer .nav.prev { left: 6px; } .viewer .nav.next { right: 6px; }
  .viewer .nav .icon { width: 24px; height: 24px; filter: none; }
  .viewer .nav:active { background: rgba(0,0,0,.65); opacity: 1; }
  .viewer .bar { flex-wrap: wrap; gap: 8px; }
  .viewer .bar .fname { display: none; }
  .viewer .comment { max-width: none; min-width: 100%; order: 5; font-size: 16px; }
  .viewer .bar-close { display: flex; }
  .viewer .bigheart { height: 44px; padding: 0 14px 0 12px; }
  .viewer .bar .counter { order: 2; margin-left: auto; font-size: 13px; }
  .viewer .bar-close { order: 3; margin-left: 0; }
  .viewer .close { top: calc(10px + env(safe-area-inset-top)); }
  .viewer .strip img { height: 44px; width: 44px; }
}

@media (pointer: coarse) {
  input, textarea { font-size: 16px; }
}

@media (max-height: 480px) {
  .viewer .strip { display: none; }
  .viewer .bar { padding: 6px 12px; }
  .viewer .comment { min-width: 0; order: 0; }
}

/* ---- revisions (client) ---- */
.banner { display: flex; align-items: center; gap: 10px; margin: 8px 8px 0; padding: 10px 12px; border-radius: var(--radius); background: rgba(47,143,245,.12); border: 1px solid rgba(47,143,245,.4); }
.banner .icon { color: var(--accent); flex: none; }
.banner.intro { background: rgba(255,45,85,.10); border-color: rgba(255,45,85,.45); }
.banner.intro .icon { color: var(--like); fill: var(--like); }
.banner span { flex: 1; }
.btn.ghost { background: none; border-color: transparent; }
.cell .badge-fix { position: absolute; left: 6px; top: 6px; font-size: 11px; font-weight: 600; padding: 3px 7px; border-radius: 999px; background: var(--accent); color: #fff; }
.cell .badge-ok { position: absolute; left: 6px; top: 6px; font-size: 11px; font-weight: 600; padding: 3px 7px; border-radius: 999px; background: var(--ok); color: #062; }
.cell .note { left: auto; right: 8px; top: 8px; }
.viewer .bigheart { position: relative; }
.viewer .msgbtn .badge { position: absolute; top: -4px; right: -4px; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.viewer .msgbtn.has { color: var(--accent); }
.viewer .bar .counter { color: var(--fg2); white-space: nowrap; }
.viewer .revbar { display: flex; align-items: center; gap: 10px; padding: 6px 14px; background: #1c1c1c; border-top: 1px solid var(--line); overflow-x: auto; scrollbar-width: thin; }
.viewer .revbar .seg { flex: none; }
.viewer .revbar .btn { flex: none; }
.viewer .revbar .revnote { flex: 1; color: var(--fg2); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer .revbar .btn.ok { background: rgba(60,207,122,.15); border-color: var(--ok); color: var(--ok); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button { padding: 5px 12px; background: var(--bg2); color: var(--fg2); }
.seg button.on { background: #fff; color: #111; }
.viewer .verhint { position: absolute; left: 12px; bottom: 12px; background: rgba(0,0,0,.6); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 999px; pointer-events: none; }
.viewer .panel { position: absolute; right: 12px; bottom: 12px; width: min(460px, calc(100% - 24px)); max-height: 80%; display: flex; flex-direction: column; background: #1e1e1e; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 10px 40px rgba(0,0,0,.6); z-index: 3; }
.viewer .panel-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.viewer .thread { flex: 1; overflow-y: auto; padding: 10px 12px; display: flex; flex-direction: column; gap: 8px; min-height: 40px; }
.msg { max-width: 90%; padding: 7px 10px; border-radius: 10px; background: var(--bg3); font-size: 13px; }
.msg.mine { align-self: flex-end; background: rgba(47,143,245,.25); }
.msg .meta { display: block; font-size: 11px; color: var(--fg2); margin-bottom: 2px; }
.msg.resolved { opacity: .7; }
.msg.reply { background: rgba(60,207,122,.15); }
.thread .empty { padding: 10px; font-size: 13px; }
.viewer .cbar { background: #171717; border-top: 1px solid var(--line); padding: 6px 14px 0; }
.viewer .lastmsg { display: block; width: 100%; text-align: left; font-size: 13px; color: var(--fg2); padding: 4px 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.viewer .lastmsg b { color: var(--fg); font-weight: 500; }
.viewer .lastmsg .more { color: var(--accent); margin-left: 6px; }
.viewer .compose { display: flex; gap: 8px; padding: 4px 0 8px; }
.viewer .compose input { flex: 1; min-width: 0; background: var(--bg2); border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px; outline: none; font-size: 16px; }
.viewer .compose input:focus { border-color: var(--accent); }
.viewer .compose .btn { border-radius: 999px; padding: 7px 14px; }
.viewer .compose .btn:disabled { opacity: .45; }
@media (max-width: 640px) {
  .banner { margin: 6px 4px 0; padding: 8px 10px; font-size: 13px; }
  .viewer .panel { right: 0; left: 0; bottom: 0; width: auto; max-height: 75%; border-radius: 10px 10px 0 0; }
  .viewer .revbar { padding: 6px 10px; }
  .viewer .cbar { padding: 4px 8px 0; }
  .viewer .compose { padding: 2px 0 6px; }
  .viewer .compose .btn { padding: 7px 12px; }
  .viewer .revbar .revnote { display: none; }
  .viewer .revbar .btn span { display: inline; }
}

/* one-time swipe hint */
@keyframes nudge { 0%, 100% { transform: translateX(0); } 35% { transform: translateX(-56px); } 60% { transform: translateX(-56px); } }
.viewer .stage img.nudge { animation: nudge 1.4s ease-in-out 1; }
.viewer .swipehint { position: absolute; left: 50%; bottom: 18%; transform: translateX(-50%); background: rgba(0,0,0,.7); color: #fff; font-size: 14px; padding: 8px 14px; border-radius: 999px; pointer-events: none; white-space: nowrap; opacity: 0; transition: opacity .3s; z-index: 2; }
.viewer .swipehint.show { opacity: 1; }
@media (pointer: coarse) and (min-width: 641px) { .viewer .nav { opacity: .6; } }