/* Giao diện kiểu game khối vuông. --u = 1 điểm ảnh giao diện; chữ dùng font pixel TK Pixel (1 điểm chữ = 1/16 em). */
:root {
  --u: 2px;
  --t: calc(var(--u) * 16);          /* cỡ chữ: 1 điểm chữ = 1 điểm giao diện */
  --gray: #c6c6c6; --dark: #4c4c4c; --d2: #585659; --d3: #313233; --d4: #131311;
  --green: #218306; --yellow: #ffff54;
  --sh: var(--u) var(--u) 0 #3f3f3f;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}
@media (max-width: 700px), (max-height: 520px) { :root { --u: 1.5px; } }
@media (min-width: 1800px) and (min-height: 1000px) { :root { --u: 3px; } }

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #000; color: #fff; overscroll-behavior: none; }
body { font-family: 'TK Pixel', monospace; font-size: var(--t); line-height: 1; -webkit-font-smoothing: none; touch-action: none; user-select: none; -webkit-user-select: none; }
button, input, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
.stage { position: fixed; inset: 0; width: 100%; height: 100%; display: block; outline: none; }

/* ---------- nút ---------- */
.mc-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: calc(var(--u) * 4);
  min-height: calc(var(--u) * 20); padding: 0 calc(var(--u) * 10);
  background: var(--gray); color: var(--dark); text-decoration: none; cursor: pointer;
  border: var(--u) solid var(--d4);
  box-shadow: inset var(--u) var(--u) #ffffffc0, inset calc(var(--u) * -1) calc(var(--u) * -1) #323232c0;
  line-height: 1;
}
.mc-btn:hover:not(:disabled), .mc-btn:focus-visible { background: var(--green); color: #fff; border-color: #fff; box-shadow: inset var(--u) var(--u) #53d95ac0, inset calc(var(--u) * -1) calc(var(--u) * -1) #118316c0; text-shadow: var(--u) var(--u) 0 #0c3a04; outline: none; }
.mc-btn:disabled { opacity: 0.45; cursor: default; }
.mc-btn[aria-pressed="true"] { background: #a8a8a8; box-shadow: inset var(--u) var(--u) #323232c0, inset calc(var(--u) * -1) calc(var(--u) * -1) #ffffff80; }
.mc-btn.big { min-height: calc(var(--u) * 24); padding: 0 calc(var(--u) * 26); }
.mc-btn.sm { min-height: calc(var(--u) * 16); padding: 0 calc(var(--u) * 6); }
.mc-btn.wide { width: 100%; }
@media (pointer: coarse) { .mc-btn { min-height: max(44px, calc(var(--u) * 20)); } .mc-btn.sm { min-height: 40px; } }

/* ---------- HUD ---------- */
.hud { position: fixed; inset: 0; pointer-events: none; opacity: 0; transition: opacity .8s .6s; z-index: 10; }
.hud.on { opacity: 1; }
.hud button, .hud .hotbar { pointer-events: auto; }
.brand { position: absolute; left: calc(var(--u) * 6); top: calc(var(--u) * 6 + var(--safe-t)); text-shadow: var(--sh); display: flex; flex-direction: column; gap: calc(var(--u) * 2); }
.brand b { font-family: 'TK Pixel Bold', 'TK Pixel'; font-weight: normal; color: var(--yellow); }
.brand span { color: #e0e0e0; font-size: calc(var(--t) * 0.75); }
@media (max-width: 700px) { .brand span { display: none; } }

.tbtns { position: absolute; right: calc(var(--u) * 6); top: calc(var(--u) * 6 + var(--safe-t)); display: flex; gap: calc(var(--u) * 4); }
.ibtn { position: relative; width: calc(var(--u) * 22); height: calc(var(--u) * 22); background: var(--gray); border: var(--u) solid var(--d4); box-shadow: inset var(--u) var(--u) #ffffffc0, inset calc(var(--u) * -1) calc(var(--u) * -1) #323232c0; cursor: pointer; display: grid; place-items: center; }
.ibtn i { width: calc(var(--u) * 16); height: calc(var(--u) * 16); background-size: 100% 100%; image-rendering: pixelated; }
.ibtn:hover, .ibtn:focus-visible { background: var(--green); border-color: #fff; outline: none; }
.ibtn[aria-pressed="true"] { background: #9e9e9e; }
.ibtn span { position: absolute; right: 0; top: calc(100% + var(--u) * 4); white-space: nowrap; padding: calc(var(--u) * 3) calc(var(--u) * 4); background: #100010f0; color: #fff; text-shadow: var(--sh); border: var(--u) solid #2a0560; box-shadow: inset 0 0 0 var(--u) #5000ff70; opacity: 0; transform: translateY(calc(var(--u) * -2)); transition: .15s; pointer-events: none; }
.ibtn:hover span, .ibtn:focus-visible span { opacity: 1; transform: none; }
@media (pointer: coarse) { .ibtn { width: max(40px, calc(var(--u) * 22)); height: max(40px, calc(var(--u) * 22)); } .ibtn span { display: none; } }

.toast { position: absolute; right: calc(var(--u) * 6); top: calc(var(--u) * 36 + var(--safe-t)); width: calc(var(--u) * 160); max-width: calc(100vw - 12px); display: flex; align-items: center; gap: calc(var(--u) * 6); padding: calc(var(--u) * 6) calc(var(--u) * 8); background: #212121; border: var(--u) solid #000; box-shadow: inset 0 0 0 var(--u) #555, inset 0 0 0 calc(var(--u) * 2) #2c2c2c; transform: translateX(calc(100% + var(--u) * 12)); transition: transform .45s cubic-bezier(.2, .8, .2, 1); }
.toast.on { transform: none; }
.toast i { flex: none; width: calc(var(--u) * 16); height: calc(var(--u) * 16); background-size: 100% 100%; image-rendering: pixelated; }
.toast p { display: flex; flex-direction: column; gap: calc(var(--u) * 4); }
.toast em { font-style: normal; color: var(--yellow); text-shadow: var(--sh); }
.toast b { font-weight: normal; color: #fff; text-shadow: var(--sh); line-height: 1.1; }

.chat { position: absolute; left: calc(var(--u) * 2); bottom: calc(var(--u) * 58 + var(--safe-b)); width: min(calc(var(--u) * 236), calc(100vw - var(--u) * 4)); display: flex; flex-direction: column; gap: 0; }
.chat p { background: rgba(0, 0, 0, .5); padding: calc(var(--u) * 1.5) calc(var(--u) * 2) calc(var(--u) * 1); text-shadow: var(--sh); line-height: 1.05; transition: opacity 1.2s; animation: chatIn .25s; }
.chat p.old { opacity: 0; }
@keyframes chatIn { from { transform: translateY(var(--u)); opacity: 0; } }
.chat .y, .y { color: var(--yellow); } .chat .g, .g { color: #55ff55; } .chat .d { color: #e0e0e0; } .chat .a { color: #aaaaff; } .chat .w { color: #fff; }
@media (max-width: 700px) { .chat { bottom: calc(var(--u) * 64 + var(--safe-b)); } }

.hint { position: absolute; left: 50%; top: 58%; transform: translateX(-50%); display: flex; align-items: center; gap: calc(var(--u) * 6); padding: calc(var(--u) * 4) calc(var(--u) * 8); background: rgba(0, 0, 0, .45); text-shadow: var(--sh); white-space: nowrap; opacity: 0; transition: opacity .6s; }
.hint.on { opacity: 1; }
@media (max-width: 700px) { .hint { white-space: normal; width: calc(100vw - var(--u) * 20); justify-content: center; text-align: center; top: 54%; } }
.mouse { flex: none; width: calc(var(--u) * 8); height: calc(var(--u) * 12); border: var(--u) solid #fff; border-radius: calc(var(--u) * 4); position: relative; }
.mouse::after { content: ''; position: absolute; left: 50%; top: calc(var(--u) * 2); width: var(--u); height: calc(var(--u) * 3); background: #fff; transform: translateX(-50%); animation: wheel 1.2s infinite; }
@keyframes wheel { 50% { transform: translate(-50%, calc(var(--u) * 3)); opacity: .3; } }
.cta { position: absolute; left: 50%; bottom: calc(var(--u) * 64 + var(--safe-b)); transform: translateX(-50%); color: var(--yellow); text-shadow: var(--sh); white-space: nowrap; opacity: 0; transition: opacity .5s; animation: cta 1.6s infinite; }
.cta.on { opacity: 1; }
.actionbar { position: absolute; left: 50%; bottom: calc(var(--u) * 78 + var(--safe-b)); transform: translateX(-50%); max-width: 92vw; padding: calc(var(--u) * 3) calc(var(--u) * 6); background: rgba(0, 0, 0, .45); color: #fff; text-shadow: var(--sh); text-align: center; line-height: 1.2; opacity: 0; transition: opacity .5s; }
.actionbar.on { opacity: 1; }
@media (max-width: 700px) { .actionbar { bottom: calc(var(--u) * 84 + var(--safe-b)); } }
@keyframes cta { 50% { color: #fff; } }
@media (max-width: 700px) { .cta { white-space: normal; text-align: center; width: 90vw; bottom: calc(var(--u) * 100 + var(--safe-b)); } }

.bar { position: absolute; left: 50%; bottom: calc(var(--u) * 2 + var(--safe-b)); transform: translateX(-50%); width: calc(var(--u) * 182); display: flex; flex-direction: column; align-items: stretch; gap: calc(var(--u) * 1); }
.slot-name { align-self: center; text-shadow: var(--sh); opacity: 0; transition: opacity .4s; margin-bottom: calc(var(--u) * 3); white-space: nowrap; }
.slot-name.on { opacity: 1; }
.hearts { display: flex; gap: 0; height: calc(var(--u) * 9); }
.hearts i { width: calc(var(--u) * 8); height: calc(var(--u) * 9); background-size: calc(var(--u) * 9) calc(var(--u) * 9); background-repeat: no-repeat; image-rendering: pixelated; }
.hearts i.full { background-image: var(--hf); } .hearts i.half { background-image: var(--hh); } .hearts i.empty { background-image: var(--he); }
.hearts i.full { animation: beat 2.4s infinite; }
@keyframes beat { 5% { transform: translateY(calc(var(--u) * -1)); } 10% { transform: none; } }
.xp { position: relative; height: calc(var(--u) * 5); background: #1c1c1c; border: var(--u) solid #000; margin: calc(var(--u) * 2) 0 calc(var(--u) * 2); }
.xp-fill { height: 100%; width: 0; background: linear-gradient(#b5ff6a, #59d214 60%, #3a9a10); box-shadow: inset 0 calc(var(--u) * -1) #2c7a0a; transition: width .3s; }
.lvl { position: absolute; left: 50%; bottom: calc(var(--u) * 1); transform: translateX(-50%); color: #80ff20; text-shadow: var(--u) 0 #000, calc(var(--u) * -1) 0 #000, 0 var(--u) #000, 0 calc(var(--u) * -1) #000; }
.hotbar { display: grid; grid-template-columns: repeat(9, 1fr); background: rgba(20, 20, 20, .55); border: var(--u) solid #000; box-shadow: inset 0 0 0 var(--u) #8b8b8b; padding: var(--u); gap: 0; }
.slot { position: relative; aspect-ratio: 1; display: grid; place-items: center; background: transparent; border: none; cursor: pointer; box-shadow: inset 0 0 0 var(--u) #3c3c3c; }
.slot i { width: 80%; height: 80%; background-size: 100% 100%; image-rendering: pixelated; }
.slot b { position: absolute; right: calc(var(--u) * 1); bottom: 0; font-weight: normal; font-size: calc(var(--t) * 0.75); color: #fff; text-shadow: var(--sh); opacity: .75; }
.slot.sel { box-shadow: inset 0 0 0 var(--u) #000, inset 0 0 0 calc(var(--u) * 2) #fff, inset 0 0 0 calc(var(--u) * 3) #8b8b8b; transform: scale(1.12); z-index: 1; }
.slot:hover { background: rgba(255, 255, 255, .18); }

/* ---------- bản đồ ---------- */
.map { position: fixed; inset: 0; z-index: 30; pointer-events: none; display: grid; place-items: end center; background: rgba(0, 0, 0, 0); transition: background .35s; }
.map.on { pointer-events: auto; background: rgba(0, 0, 0, .35); }
.map-hold { position: relative; width: min(78vh, 90vw); aspect-ratio: 1; margin-bottom: calc(var(--u) * 46 + var(--safe-b)); perspective: 900px; transform: translateY(120%) rotateX(30deg); transition: transform .5s cubic-bezier(.2, .9, .3, 1); }
.map.on .map-hold { transform: none; }
.paper { position: absolute; inset: 0; padding: 6%; background: #e8dcb8; border: calc(var(--u) * 2) solid #7a6440; box-shadow: inset 0 0 0 calc(var(--u) * 3) #c9b88f, 0 calc(var(--u) * 8) 0 rgba(0, 0, 0, .35); transform: rotateX(14deg); transform-origin: 50% 100%; cursor: crosshair; }
.paper canvas { width: 100%; height: 100%; display: block; image-rendering: pixelated; }
.paper .map-img { position: absolute; inset: 6%; width: 88%; height: 88%; }
.pearl { position: absolute; z-index: 2; width: calc(var(--u) * 16); height: calc(var(--u) * 16); margin: calc(var(--u) * -8) 0 0 calc(var(--u) * -8); background-size: 100% 100%; image-rendering: pixelated; transition: left .25s, top .25s; animation: bob 1.2s infinite; translate: 0 0; }
.paper .pearl { left: 50%; top: 50%; }
.paper { --inset: 6%; }
.paper .pearl { margin-left: calc(var(--u) * -8); }
@keyframes bob { 50% { transform: translateY(calc(var(--u) * -3)); } }
.hand { position: absolute; bottom: -18%; width: 18%; aspect-ratio: 2 / 3; background-size: 100% 100%; image-rendering: pixelated; z-index: 3; }
.hand.l { left: -2%; transform: rotate(18deg); } .hand.r { right: -2%; transform: rotate(-18deg); }
.map-ui { position: absolute; left: 50%; bottom: calc(var(--u) * 6 + var(--safe-b)); transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: calc(var(--u) * 4); opacity: 0; transition: opacity .3s .15s; width: max-content; max-width: 96vw; }
.map.on .map-ui { opacity: 1; }
.map-label { text-shadow: var(--sh); background: rgba(0, 0, 0, .55); padding: calc(var(--u) * 3) calc(var(--u) * 6); }
.map-btns { display: flex; gap: calc(var(--u) * 3); flex-wrap: wrap; justify-content: center; }
.tp { position: fixed; inset: 0; z-index: 40; pointer-events: none; opacity: 0; background: radial-gradient(circle at 50% 50%, rgba(200, 120, 255, .2), rgba(70, 0, 120, .92) 70%); }
.tp.go { animation: tp .95s ease-out; }
@keyframes tp { 0% { opacity: 0; } 18% { opacity: 1; } 100% { opacity: 0; } }

/* ---------- hộp thoại ---------- */
.overlay { position: fixed; inset: 0; z-index: 50; background: #2929298a; opacity: 0; pointer-events: none; transition: opacity .3s; }
.overlay.on { opacity: 1; pointer-events: auto; }
.modal { position: fixed; left: 50%; top: 50%; z-index: 60; width: min(calc(var(--u) * 360), calc(100vw - 16px)); height: min(calc(var(--u) * 320), calc(100svh - 24px)); display: flex; flex-direction: column; border: calc(var(--u) * 2) solid var(--d4); transform: translate(-50%, 60vh); opacity: 0; pointer-events: none; transition: transform .4s cubic-bezier(.2, .9, .3, 1), opacity .3s; }
.modal.on { transform: translate(-50%, -50%); opacity: 1; pointer-events: auto; }
.modal header { flex: none; display: flex; align-items: center; justify-content: space-between; gap: calc(var(--u) * 6); padding: calc(var(--u) * 7) calc(var(--u) * 10); background: var(--gray); color: #3a3a3a; }
.modal h2 { font-family: 'TK Pixel Bold', 'TK Pixel'; font-weight: normal; line-height: 1.1; }
.xbtn { flex: none; width: calc(var(--u) * 16); height: calc(var(--u) * 16); display: grid; place-items: center; border: none; background: transparent; color: var(--dark); cursor: pointer; font-family: monospace; font-size: calc(var(--u) * 11); }
.xbtn:hover, .xbtn:focus-visible { background: var(--d2); color: #fff; outline: none; }
@media (pointer: coarse) { .xbtn { width: 44px; height: 44px; } }
.modal-body { flex: 1; overflow-y: auto; overflow-x: hidden; background: var(--d3); border: calc(var(--u) * 3) solid var(--d2); padding: calc(var(--u) * 8) calc(var(--u) * 10) calc(var(--u) * 12); touch-action: pan-y; user-select: text; -webkit-user-select: text; }
.modal-body::-webkit-scrollbar { width: calc(var(--u) * 6); }
.modal-body::-webkit-scrollbar-track { background: var(--gray); }
.modal-body::-webkit-scrollbar-thumb { border: var(--u) solid var(--d4); background: var(--gray); box-shadow: inset 0 var(--u) #ffffffc0, inset 0 calc(var(--u) * -1) #323232c0; }
.shot { margin-bottom: calc(var(--u) * 8); border: calc(var(--u) * 2) solid #000; background: #000; }
.shot img { width: 100%; display: block; image-rendering: auto; }
.shot figcaption { padding: calc(var(--u) * 3) calc(var(--u) * 4); color: #bbb; font-size: calc(var(--t) * 0.75); text-shadow: var(--sh); }
.sec { margin: calc(var(--u) * 8) 0 calc(var(--u) * 6); padding: calc(var(--u) * 4) calc(var(--u) * 5); background: var(--d2); font-weight: normal; text-shadow: var(--sh); }
.para { margin: calc(var(--u) * 5) 0; line-height: 1.3; text-shadow: var(--sh); }
.log { background: #1b1b1b; border: var(--u) solid #000; padding: calc(var(--u) * 4); display: flex; flex-direction: column; gap: calc(var(--u) * 2); }
.log p { text-shadow: var(--sh); line-height: 1.15; }
.log .w { color: #fff; } .log .d { color: #ccc; } .log .a { color: #aaaaff; }
.photo { margin: 0 0 calc(var(--u) * 6); background: #000; border: calc(var(--u) * 2) solid #000; }
.photo img { display: block; width: 100%; max-height: min(62vh, calc(var(--u) * 240)); object-fit: contain; background: #111; }
.photo figcaption { display: flex; flex-direction: column; gap: calc(var(--u) * 3); padding: calc(var(--u) * 5) calc(var(--u) * 5) calc(var(--u) * 6); text-shadow: var(--sh); line-height: 1.25; }
.photo figcaption b { font-weight: normal; color: var(--yellow); }
.ph-nav { display: flex; align-items: center; justify-content: space-between; gap: calc(var(--u) * 6); text-shadow: var(--sh); }
.small-note { color: #cfcfcf; font-size: calc(var(--t) * 0.75); }
.credit { margin-top: calc(var(--u) * 6); color: #a8a8a8; font-size: calc(var(--t) * 0.75); text-shadow: var(--sh); line-height: 1.3; }
.credit a { color: #9fd0ff; }
.kyear { color: var(--yellow); text-shadow: var(--sh); margin-bottom: calc(var(--u) * 4); }
.thumbs { display: flex; gap: calc(var(--u) * 4); margin-top: calc(var(--u) * 8); }
.thumbs button { flex: 1; padding: 0; border: calc(var(--u) * 2) solid #000; background: #000; cursor: pointer; }
.thumbs button:hover, .thumbs button:focus-visible { border-color: #fff; outline: none; }
.thumbs img { display: block; width: 100%; aspect-ratio: 2 / 3; object-fit: cover; }
.paint { margin: 0 auto calc(var(--u) * 8); width: min(60%, calc(var(--u) * 120)); border: calc(var(--u) * 4) solid #a12722; box-shadow: 0 0 0 calc(var(--u) * 2) #e3b23c; }
.paint img { display: block; width: 100%; image-rendering: pixelated; }
.row-btns { display: flex; flex-wrap: wrap; gap: calc(var(--u) * 6); margin-top: calc(var(--u) * 10); }

/* ---------- sách ---------- */
.book { position: fixed; left: 50%; top: 50%; z-index: 60; display: flex; flex-direction: column; align-items: center; gap: calc(var(--u) * 16); transform: translate(-50%, 70vh) rotate(-3deg); opacity: 0; pointer-events: none; transition: transform .45s cubic-bezier(.2, .9, .3, 1), opacity .3s; }
.book.on { transform: translate(-50%, -50%); opacity: 1; pointer-events: auto; }
.sheet { --bu: min(var(--u), calc((100vw - 20px) / 214), calc((100svh - 110px) / 262)); position: relative; width: calc(var(--bu) * 214); height: calc(var(--bu) * 262); padding: calc(var(--bu) * 24) calc(var(--bu) * 16) calc(var(--bu) * 30) calc(var(--bu) * 22); color: #2b2b2b; font-size: calc(var(--bu) * 12);
  background: linear-gradient(90deg, #d8c8a0 0, #f3e9d0 calc(var(--bu) * 8), #fbf4e2 40%, #f6edd6); border: calc(var(--bu) * 2) solid #5a3a1e; box-shadow: 0 0 0 calc(var(--bu) * 3) #8a5a2c, 0 0 0 calc(var(--bu) * 5) #3a2412, 0 calc(var(--bu) * 10) 0 calc(var(--bu) * 5) rgba(0, 0, 0, .35); user-select: text; -webkit-user-select: text; }
.pno { position: absolute; right: calc(var(--bu) * 12); top: calc(var(--bu) * 10); color: #7a6a4a; font-size: calc(var(--bu) * 16 * 0.75); }
.pages { height: 100%; overflow-y: auto; overflow-x: hidden; touch-action: pan-y; }
.page h3 { font-family: 'TK Pixel Bold', 'TK Pixel'; font-weight: normal; font-size: calc(var(--bu) * 16); color: #6b1d16; margin-bottom: calc(var(--bu) * 8); }
.page p { line-height: 1.32; margin: calc(var(--bu) * 4) 0; }
.page b { font-weight: normal; color: #a12722; }
.page .small { color: #7a6a4a; font-size: calc(var(--bu) * 10); line-height: 1.3; }
.page .big { font-family: 'TK Pixel Bold', 'TK Pixel'; font-size: calc(var(--bu) * 20); line-height: 1.2; color: #3a2a1a; }
.page .big2 { font-family: 'TK Pixel Bold', 'TK Pixel'; font-size: calc(var(--bu) * 16); color: #3a2a1a; }
.pg-cover { font-size: calc(var(--bu) * 14); height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: calc(var(--bu) * 6); }
.pg-cover .kick { letter-spacing: calc(var(--bu) * 1); color: #8a5a2c; }
.pg-cover .xi { width: calc(var(--bu) * 60); height: calc(var(--bu) * 52); image-rendering: pixelated; }
.pg-cover .names { font-family: 'TK Pixel Bold', 'TK Pixel'; font-size: calc(var(--bu) * 22); line-height: 1.15; color: #a12722; }
.pg-cover .names span { color: #8a5a2c; font-size: calc(var(--bu) * 16); }
.fam { display: grid; grid-template-columns: 1fr 1fr; gap: calc(var(--bu) * 6); margin-top: calc(var(--bu) * 10); }
.fam h4 { font-weight: normal; color: #8a5a2c; margin-bottom: calc(var(--bu) * 3); }
.fam p { font-size: calc(var(--bu) * 11); line-height: 1.35; margin: 0; }
.sched { list-style: none; margin: calc(var(--bu) * 8) 0; display: flex; flex-direction: column; gap: calc(var(--bu) * 4); }
.sched li { display: flex; gap: calc(var(--bu) * 8); }
.sched b { color: #a12722; min-width: 4.2em; }
.cd { display: flex; gap: calc(var(--bu) * 6); margin-top: calc(var(--bu) * 6); }
.cd span { flex: 1; display: flex; flex-direction: column; align-items: center; gap: calc(var(--bu) * 3); padding: calc(var(--bu) * 4) 0; background: #2b2b2b; color: #ddd; font-size: calc(var(--bu) * 10); }
.cd b { color: #80ff20; font-size: calc(var(--bu) * 14); }
.cd .done { color: var(--yellow); font-size: calc(var(--bu) * 16); padding: calc(var(--bu) * 6); }
.bk-btns { display: flex; flex-wrap: wrap; gap: calc(var(--bu) * 4); margin: calc(var(--bu) * 8) 0; }
.bk-btns.col { flex-direction: column; align-items: stretch; }
.page .mc-btn { font-size: calc(var(--bu) * 12); min-height: calc(var(--bu) * 18); padding: 0 calc(var(--bu) * 6); border-width: var(--bu); box-shadow: inset var(--bu) var(--bu) #ffffffc0, inset calc(var(--bu) * -1) calc(var(--bu) * -1) #323232c0; }
.page .mc-btn[aria-pressed="true"] { background: var(--green); color: #fff; border-color: #fff; }
@media (pointer: coarse) { .page .mc-btn { min-height: 40px; } }
.pg-end { height: 100%; display: flex; flex-direction: column; justify-content: center; }
.pg-end .sig { margin-top: calc(var(--bu) * 8); color: #6b1d16; line-height: 1.4; }
.rsvp { display: flex; flex-direction: column; gap: calc(var(--bu) * 6); }
.fld { display: flex; flex-direction: column; gap: calc(var(--bu) * 2); }
.fld span, .slider span { color: #7a6a4a; font-size: calc(var(--bu) * 10); }
.fld input, .fld textarea { width: 100%; background: transparent; border: none; border-bottom: var(--bu) solid #8a7a5a; padding: calc(var(--bu) * 2) 0; color: #2b2b2b; font-size: max(16px, calc(var(--bu) * 12)); outline: none; resize: none; line-height: 1.25; }
.fld textarea { border: var(--bu) solid #b8a880; padding: calc(var(--bu) * 3); }
.fld input:focus, .fld textarea:focus { border-color: #a12722; background: rgba(255, 255, 255, .5); }
.seg { display: flex; gap: calc(var(--bu) * 4); }
.seg .mc-btn { flex: 1; padding: 0 calc(var(--bu) * 2); }
.slider { display: flex; flex-direction: column; gap: calc(var(--bu) * 3); }
.slider input { -webkit-appearance: none; appearance: none; width: 100%; height: calc(var(--bu) * 12); background: #000; border: var(--bu) solid #000; box-shadow: inset 0 0 0 var(--bu) #555; }
.slider input::-webkit-slider-thumb { -webkit-appearance: none; width: calc(var(--bu) * 8); height: calc(var(--bu) * 14); background: var(--gray); border: var(--bu) solid #000; box-shadow: inset var(--bu) var(--bu) #fff, inset calc(var(--bu) * -1) calc(var(--bu) * -1) #555; cursor: pointer; }
.slider input::-moz-range-thumb { width: calc(var(--bu) * 8); height: calc(var(--bu) * 14); background: var(--gray); border: var(--bu) solid #000; border-radius: 0; }
.err { color: #c41e2a; min-height: 1em; font-size: calc(var(--bu) * 12); }
.signed .stamp { display: inline-block; padding: calc(var(--bu) * 4) calc(var(--bu) * 6); border: var(--bu) solid #a12722; color: #a12722; transform: rotate(-3deg); margin-bottom: calc(var(--bu) * 6); }
.signed .msg { color: #5a4a30; font-style: normal; }
.arrow { position: absolute; bottom: calc(var(--bu) * 8); width: calc(var(--bu) * 18); height: calc(var(--bu) * 10); border: none; cursor: pointer; background: transparent; }
.arrow::before { content: ''; position: absolute; inset: 0; background: #3a2a1a; clip-path: polygon(0 50%, 40% 0, 40% 30%, 100% 30%, 100% 70%, 40% 70%, 40% 100%); }
.arrow.next::before { transform: scaleX(-1); }
.arrow.prev { left: calc(var(--bu) * 16); } .arrow.next { right: calc(var(--bu) * 16); }
.arrow:hover::before, .arrow:focus-visible::before { background: #a12722; }
.arrow:disabled { opacity: 0; pointer-events: none; }
@media (pointer: coarse) { .arrow { width: 48px; height: 32px; bottom: 4px; } }
.book .done { min-width: calc(var(--u) * 100); }

/* ---------- màn tải ---------- */
.loading { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; overflow: hidden; }
.loading.gone { display: none; }
.cells { position: absolute; inset: 0; display: flex; flex-direction: column; }
.cells .row { flex: 1; display: flex; }
.cells i { flex: 1; background: var(--dirt) repeat; background-size: calc(var(--u) * 32); image-rendering: pixelated; filter: brightness(.32); transition: transform 1.1s cubic-bezier(.6, 0, .3, 1) var(--d); }
.cells i.l { background-position: right top; }
.loading.reveal .cells i.l { transform: translateX(-101%); }
.loading.reveal .cells i.r { transform: translateX(101%); }
.ld-in { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; gap: calc(var(--u) * 8); padding: 16px; text-align: center; transition: opacity .5s; max-width: 100vw; }
.loading.reveal .ld-in { opacity: 0; }
.logo-wrap { position: relative; }
.logo { display: block; width: min(calc(var(--u) * 260), 92vw); image-rendering: pixelated; }
.splash { position: absolute; right: -4%; bottom: 4%; color: var(--yellow); text-shadow: var(--u) var(--u) 0 #3f3f00; transform: rotate(-18deg); animation: splash .55s ease-in-out infinite alternate; white-space: nowrap; }
@keyframes splash { to { transform: rotate(-18deg) scale(1.12); } }
.ld-sub { text-shadow: var(--sh); line-height: 1.3; }
.ld-sub b { color: var(--yellow); font-weight: normal; }
.ld-bar { display: flex; gap: calc(var(--u) * 2); padding: calc(var(--u) * 2); border: var(--u) solid #fff; width: min(calc(var(--u) * 180), 84vw); height: calc(var(--u) * 12); }
.ld-bar i { flex: 1; background: #2a2a2a; }
.ld-bar i.on { background: #fff; box-shadow: inset 0 calc(var(--u) * -2) #a0a0a0; }
.ld-btns { display: flex; flex-wrap: wrap; gap: calc(var(--u) * 6); justify-content: center; }
.ld-btns .mc-btn[hidden] { display: none; }
.ld-status { color: #d0d0d0; text-shadow: var(--sh); min-height: 1em; }
.loading.ready .ld-bar, .loading.ready .ld-status { display: none; }
.loading.failed .ld-status { display: block; color: #ffb0a0; max-width: 90vw; line-height: 1.3; }
.ld-tips { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: calc(var(--u) * 6) calc(var(--u) * 12); margin-top: calc(var(--u) * 8); color: #bdbdbd; text-shadow: var(--sh); font-size: calc(var(--t) * 0.75); }
.ld-tips li { display: flex; align-items: center; gap: calc(var(--u) * 4); }
.ld-tips i { display: inline-grid; place-items: center; width: calc(var(--u) * 10); height: calc(var(--u) * 12); border: var(--u) solid #bdbdbd; font-style: normal; font-size: calc(var(--t) * 0.6); }
.ld-tips .t-mouse { border-radius: calc(var(--u) * 4); }
.ld-tips .t-glow { background: #ffe9a8; border-color: #fff; box-shadow: 0 0 calc(var(--u) * 4) #ffd36b; width: calc(var(--u) * 8); height: calc(var(--u) * 8); }
.nojs { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; padding: 24px; background: #222; font-family: sans-serif; font-size: 18px; line-height: 1.5; text-align: center; }
@media (prefers-reduced-motion: reduce) { .splash, .cta, .hearts i.full, .pearl { animation: none; } }