/* ==========================================================================
   默書大亂鬥 — lobby.css（學生 shell：① 登入／入房 ＋ ② 大廳）
   規格：doc/ui-screens.md M18-T1（①）、M18-T2（②）、§0.3 設計 token

   兩套皮膚靠 `body[data-view]` 切：
     join  → 暖色「木牌／卡紙」系（用戶 2026-10-15 收貨）
     lobby → 「星空 ＋ 木框 ＋ 金邊」系（用戶 2026-10-15 暫收貨）
   ⚠️ 金邊一律 CSS／inline SVG 角飾，零外部圖（§0.3 定案）。
   ========================================================================== */

/* ══════════════════════════════════════════════════════════════════
   ① 學生登入／入房 — 暖色木牌／卡紙
   ══════════════════════════════════════════════════════════════════ */
body[data-view="join"]{
  --bg:#2b261f;
  --card:#f5eedc;
  --card-2:#fdf3df;
  --line:#8b5a2b;
  --text:#3a2e2b;
  --muted:#8c7b70;
  --err:#d93838;
  --ok:#2e8b57;
  --ok-dark:#1b5334;
  --ok-disabled:#7a9a85;
  --warn:#b26a00;
  --input-bg:#fffbf2;
  --input-border:#c8b293;
  --input-focus:#e28743;
}
/* 學生 shell 彈出嘅對話框跟返卡紙色 */
body[data-view="join"] .modal .panel{ background:#f5eedc; border:4px solid #8b5a2b; color:#3a2e2b; }
body[data-view="join"] .toast{ background:#422006; border-color:#8b5a2b; color:#fde68a; }

.join-card{
  width:100%;
  max-width:480px;
  background:var(--card);
  border:4px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px 20px 16px;
  display:flex;
  flex-direction:column;
  gap:14px;
  box-shadow:0 8px 24px rgba(0,0,0,.5), inset 0 0 12px rgba(139,90,43,.2);
}
@media (min-width:640px){ .join-card{ max-width:560px; padding:28px 24px 18px; } }
@media (min-width:1280px){ .join-card{ max-width:640px; } }

.join-head{ text-align:center; }
.join-head h1{ color:#5c2c16; text-shadow:1px 1px 0 #fff; }
.join-head p{ color:var(--text); font-weight:600; margin:0; }
@media (min-width:1280px){ .join-head p{ font-size:1.1em; } }

.field-label{ font-size:.9em; font-weight:800; color:var(--text); }
.field-label .opt{ font-weight:600; color:var(--muted); font-size:.92em; }

/* 房碼／PIN 格：細一啲（手機要 6 格 ＋ 4 格都放得落） */
@media (max-width:639px){
  body[data-view="join"] .otp{ gap:6px; }
  body[data-view="join"] .otp input{ width:46px; font-size:1.3em; }
}
.otp.bad input{ border-color:var(--err); }
.room-hint{ font-size:.85em; color:var(--muted); text-align:center; min-height:1.3em; }

/* 兩段式註冊確認卡 —— 用琥珀虛線（紅係錯誤，唔可以撈亂） */
.confirm-card{
  border:2px dashed var(--warn);
  background:#fdf3df;
  color:#7a4a00;
  border-radius:var(--radius-box);
  padding:.6rem .75rem;
  font-size:.88em;
  line-height:1.5;
}
.confirm-card strong{ color:#5c3300; }

.error-area{
  min-height:1.4em;
  color:var(--err);
  font-size:.95em;
  font-weight:800;
  text-align:center;
  line-height:1.45;
}
.error-area.ok{ color:#1c6b3f; }
.error-area strong{ color:#5c2c16; }

.btn-main{
  width:100%;
  min-height:var(--btn-h);
  background:var(--ok);
  color:#fff;
  border:0;
  border-radius:12px;
  font-size:1.3em;
  font-weight:800;
  cursor:pointer;
  box-shadow:0 4px 0 var(--ok-dark);
  transition:transform .1s, box-shadow .1s, background-color .15s;
}
.btn-main:hover:not(:disabled){ background:#246b43; }
.btn-main:active:not(:disabled){ transform:translateY(2px); box-shadow:0 2px 0 var(--ok-dark); }
.btn-main:disabled{ background:var(--ok-disabled); box-shadow:none; cursor:not-allowed; }

.join-foot{ display:flex; justify-content:space-between; gap:.5rem; align-items:center; margin-top:2px; }
.join-foot a{ font-size:.85em; font-weight:800; color:#8b5a2b; text-decoration:none; }
.join-foot a:hover{ text-decoration:underline; }

/* ══════════════════════════════════════════════════════════════════
   ② 學生大廳 — 星空 ＋ 木框 ＋ 金邊
   ══════════════════════════════════════════════════════════════════ */
body[data-view="lobby"]{
  --sky-1:#241c46; --sky-2:#140f2c; --sky-3:#0b0a1c;
  --wood-1:#a8703a; --wood-2:#7a4d24; --wood-3:#5c3618;
  --panel:#1b2244; --panel-2:#222a52; --panel-line:#3d4a7a;
  --gold:#e8c26a; --gold-soft:#f0d48a; --gold-line:#b8912f;
  --row:#232b4a; --row-line:#3a4670;
  --text:#eef2ff; --muted:#9aa6d0;
  --ok:#37d67a; --ok-dark:#1e8f4e;
  --input-bg:#141a34; --input-border:#3a4670; --input-focus:var(--gold);
  background:
    radial-gradient(2px 2px at 12% 8%, rgba(255,255,255,.75), transparent 60%),
    radial-gradient(1.5px 1.5px at 78% 12%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1.5px 1.5px at 33% 22%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(2px 2px at 62% 34%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1.5px 1.5px at 88% 48%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(1.5px 1.5px at 8% 55%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(2px 2px at 46% 68%, rgba(255,255,255,.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 24% 84%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(1.5px 1.5px at 72% 90%, rgba(255,255,255,.35), transparent 60%),
    linear-gradient(165deg, #241c46 0%, #140f2c 48%, #0b0a1c 100%);
  background-attachment:fixed;
}
body[data-view="lobby"] .modal .panel{
  background:linear-gradient(180deg, #b87c40, #6b4423);
  border:4px solid var(--gold-line);
  color:#fff6e2;
  border-radius:16px;
  box-shadow:0 0 0 2px #3a2109, inset 0 0 0 2px rgba(255,240,200,.45), 0 14px 34px rgba(0,0,0,.7);
}
body[data-view="lobby"] .modal .panel .muted{ color:#f6e6c8; }
body[data-view="lobby"] .toast{ background:#241c46; border-color:var(--gold-line); color:var(--gold-soft); }

.screen.lobby-screen{ align-items:flex-start; }

/* ⭐ 金色雕花角飾（純 inline SVG data-URI；L 形金漸變角 ＋ 鉚釘） */
body[data-view="lobby"]{
  --c-tl:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28'><defs><linearGradient id='g' x1='0' y1='0' x2='1' y2='1'><stop offset='0' stop-color='%23fff3c4'/><stop offset='.45' stop-color='%23e3b93f'/><stop offset='1' stop-color='%238a6414'/></linearGradient></defs><path d='M2 26 L2 7 Q2 2 7 2 L26 2 L26 8 L9 8 Q8 8 8 9 L8 26 Z' fill='url(%23g)'/><circle cx='7' cy='7' r='2.4' fill='%23fff6d0'/></svg>");
  --c-tr:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28'><defs><linearGradient id='g' x1='0' y1='0' x2='1' y2='1'><stop offset='0' stop-color='%23fff3c4'/><stop offset='.45' stop-color='%23e3b93f'/><stop offset='1' stop-color='%238a6414'/></linearGradient></defs><g transform='scale(-1,1) translate(-28,0)'><path d='M2 26 L2 7 Q2 2 7 2 L26 2 L26 8 L9 8 Q8 8 8 9 L8 26 Z' fill='url(%23g)'/><circle cx='7' cy='7' r='2.4' fill='%23fff6d0'/></g></svg>");
  --c-bl:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28'><defs><linearGradient id='g' x1='0' y1='0' x2='1' y2='1'><stop offset='0' stop-color='%23fff3c4'/><stop offset='.45' stop-color='%23e3b93f'/><stop offset='1' stop-color='%238a6414'/></linearGradient></defs><g transform='scale(1,-1) translate(0,-28)'><path d='M2 26 L2 7 Q2 2 7 2 L26 2 L26 8 L9 8 Q8 8 8 9 L8 26 Z' fill='url(%23g)'/><circle cx='7' cy='7' r='2.4' fill='%23fff6d0'/></g></svg>");
  --c-br:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28'><defs><linearGradient id='g' x1='0' y1='0' x2='1' y2='1'><stop offset='0' stop-color='%23fff3c4'/><stop offset='.45' stop-color='%23e3b93f'/><stop offset='1' stop-color='%238a6414'/></linearGradient></defs><g transform='scale(-1,-1) translate(-28,-28)'><path d='M2 26 L2 7 Q2 2 7 2 L26 2 L26 8 L9 8 Q8 8 8 9 L8 26 Z' fill='url(%23g)'/><circle cx='7' cy='7' r='2.4' fill='%23fff6d0'/></g></svg>");
}

/* 主木框 */
.board{
  width:100%;
  max-width:520px;
  padding:16px 14px 14px;
  border-radius:18px;
  border:4px solid var(--gold-line);
  display:flex;
  flex-direction:column;
  gap:10px;
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    repeating-linear-gradient(92deg, rgba(0,0,0,.10) 0 3px, rgba(255,255,255,.045) 3px 7px),
    linear-gradient(180deg, var(--wood-1), var(--wood-2) 60%, var(--wood-3));
  background-size:34px 34px, 34px 34px, 34px 34px, 34px 34px, auto, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, repeat, no-repeat;
  box-shadow:
    0 0 0 2px #3a2109,
    inset 0 0 0 2px rgba(255,235,180,.5),
    inset 0 0 26px rgba(0,0,0,.45),
    0 12px 30px rgba(0,0,0,.65);
}
@media (min-width:1280px){ .board{ max-width:1180px; padding:20px; } }

/* 木牌（隊頭／複製掣） */
.woodbar{
  border-radius:10px;
  padding:6px 10px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.5rem;
  border:2px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, #b87c40, #7a4d24);
  background-size:22px 22px, 22px 22px, 22px 22px, 22px 22px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.45), 0 3px 0 rgba(0,0,0,.35);
}

/* 頂部：房碼 ＋ 複製 ＋ 統計 */
.topbar{ display:flex; flex-wrap:wrap; align-items:center; gap:.5rem; }
.roomcode{
  position:relative;
  flex:0 0 auto;
  padding:4px 18px 4px 22px;
  border-radius:10px;
  border:3px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, #b87c40, #6b4423);
  background-size:22px 22px, 22px 22px, 22px 22px, 22px 22px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.5), 0 4px 0 rgba(0,0,0,.4);
}
.roomcode::before{
  content:"";
  position:absolute;
  left:-7px;
  top:50%;
  width:14px;
  height:14px;
  margin-top:-7px;
  transform:rotate(45deg);
  border-radius:3px;
  background:linear-gradient(135deg,#a9d8ff,#2b62c9 60%,#123a7d);
  border:2px solid var(--gold-line);
  box-shadow:0 0 8px rgba(120,170,255,.6);
}
.roomcode b{
  font-size:34px;
  letter-spacing:.06em;
  color:var(--gold-soft);
  text-shadow:0 2px 0 #3a2410, 0 0 12px rgba(232,194,106,.5);
}
.copybtn{
  flex:0 0 auto;
  font-size:.78em;
  font-weight:800;
  color:#fff3d2;
  cursor:pointer;
  padding:.45rem .7rem;
  border-radius:8px;
  border:2px solid var(--gold-line);
  background:linear-gradient(180deg, #c1934f, #7a4d24);
  box-shadow:0 0 0 1px #3a2109, inset 0 1px 0 rgba(255,245,210,.5), 0 2px 0 rgba(0,0,0,.35);
}
.copybtn:hover{ filter:brightness(1.08); }
.stats{ margin-left:auto; font-size:.95em; color:var(--gold); font-weight:800; text-shadow:0 1px 2px #000; }
.stats b{ color:#fff; }
.copymsg{ width:100%; font-size:.72em; color:#9fe6bd; min-height:1em; }
/* 投影（≥1280）：房碼／統計要喺大電視睇得清（§②-7） */
@media (min-width:1280px){
  .roomcode b{ font-size:64px; }
  .copybtn{ font-size:.9em; }
  .stats{ font-size:1.15em; }
}

/* 我嘅卡 */
.mycard{
  border-radius:12px;
  padding:10px;
  display:flex;
  justify-content:center;
  border:3px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, var(--panel-2), var(--panel));
  background-size:22px 22px, 22px 22px, 22px 22px, 22px 22px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.35), inset 0 0 14px rgba(0,0,0,.55);
}
.tag{
  padding:6px 16px;
  border-radius:10px;
  font-weight:900;
  font-size:1em;
  color:#fff;
  border:2px solid rgba(255,255,255,.3);
  box-shadow:0 2px 0 rgba(0,0,0,.4), inset 0 1px 0 rgba(255,255,255,.3), 0 0 0 1px #3a2109;
}
.tag.red{ background:linear-gradient(180deg,#ef5350,#b3211f); }
.tag.blue{ background:linear-gradient(180deg,#5b9bf5,#1e50a8); }

/* 準備掣：金雕花外框 ＋ 綠色內裡 */
.btnwrap{
  padding:5px;
  border-radius:16px;
  border:3px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, #f0d68f, #b8912f 45%, #7a5a12);
  background-size:26px 26px, 26px 26px, 26px 26px, 26px 26px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,250,220,.6), 0 6px 16px rgba(0,0,0,.5);
}
.readybtn{
  width:100%;
  min-height:64px;
  font-size:1.4em;
  font-weight:900;
  color:#fff;
  cursor:pointer;
  border-radius:12px;
  border:2px solid #0e5c32;
  background:linear-gradient(180deg, var(--ok), var(--ok-dark));
  box-shadow:0 0 22px rgba(55,214,122,.5), inset 0 2px 0 rgba(255,255,255,.35), inset 0 0 12px rgba(0,0,0,.35);
  text-shadow:0 1px 3px rgba(0,0,0,.55);
}
.readybtn:active{ transform:translateY(1px); }
.readybtn.done{
  background:linear-gradient(180deg,#6b7280,#4b5563);
  border-color:#374151;
  box-shadow:inset 0 2px 0 rgba(255,255,255,.2), inset 0 0 12px rgba(0,0,0,.4);
}
.readybtn:disabled{ opacity:.65; cursor:not-allowed; }
@media (min-width:1280px){ .readybtn{ font-size:1.6em; min-height:76px; } }

/* 兩隊：手機紅上藍下；≥700px 左右兩欄 */
.teams{ display:grid; gap:10px; }
@media (min-width:700px){ .teams{ grid-template-columns:1fr 1fr; align-items:start; } }
.team{ display:flex; flex-direction:column; gap:.5rem; }
.teamhead{ justify-content:space-between; font-weight:900; font-size:1em; color:#fff8e6; }
.teamhead .n{ font-size:.95em; }
@media (min-width:1280px){ .teamhead{ font-size:1.15em; } }

.members{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:9px;
  border-radius:12px;
  border:3px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, rgba(15,20,44,.88), rgba(10,14,32,.92));
  background-size:24px 24px, 24px 24px, 24px 24px, 24px 24px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.3), inset 0 0 18px rgba(0,0,0,.65);
  max-height:46vh;
  overflow:auto;
}
@media (min-width:700px){ .members{ max-height:52vh; } }

.row{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:9px 10px;
  border-radius:9px;
  background:var(--row);
  border:2px solid var(--row-line);
  font-size:.95em;
  font-weight:700;
}
@media (min-width:1280px){ .row{ font-size:1.1em; padding:11px 12px; } }
.row .seat{ color:var(--muted); font-variant-numeric:tabular-nums; }
.row .nm{ flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.row .badge{ flex:0 0 auto; font-size:.8em; font-weight:900; padding:3px 9px; border-radius:999px; }
.row .badge.ready{ background:#1e8f4e; color:#eafff2; box-shadow:inset 0 1px 0 rgba(255,255,255,.3); }
.row .badge.not{ background:#3a4152; color:#c3cade; }
.row .badge.off{ background:#4b5563; color:#e5e7eb; }
.row.me{ border-color:var(--gold); box-shadow:0 0 10px rgba(232,194,106,.35), inset 0 0 0 1px rgba(255,240,190,.35); }
.row.me .nm{ color:var(--gold-soft); }
.row.off .nm{ color:#7d89ad; }
.row.empty{ justify-content:center; color:var(--muted); font-weight:600; }

/* 底部：等待提示 ＋ 返去掣 */
.footerbar{ display:flex; align-items:center; gap:.6rem; }
.waiting{
  flex:1;
  text-align:center;
  padding:12px;
  border-radius:12px;
  font-size:1.2em;
  font-weight:900;
  color:#cfe4ff;
  border:3px solid var(--gold-line);
  background-image:
    var(--c-tl), var(--c-tr), var(--c-bl), var(--c-br),
    linear-gradient(180deg, rgba(20,26,54,.95), rgba(12,16,36,.95));
  background-size:26px 26px, 26px 26px, 26px 26px, 26px 26px, auto;
  background-position:left top, right top, left bottom, right bottom, 0 0;
  background-repeat:no-repeat, no-repeat, no-repeat, no-repeat, no-repeat;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.35), inset 0 0 18px rgba(0,0,0,.6), 0 0 14px rgba(120,160,255,.25);
  text-shadow:0 1px 3px #000;
}
.waiting.on{
  color:#bdf0cf;
  border-color:#d4c07a;
  box-shadow:0 0 0 1px #3a2109, inset 0 0 0 1px rgba(255,235,180,.45), inset 0 0 18px rgba(0,0,0,.6), 0 0 18px rgba(55,214,122,.45);
}
@media (min-width:1280px){ .waiting{ font-size:1.5em; } }
.leavebtn{
  flex:0 0 auto;
  font-size:.8em;
  font-weight:800;
  color:#fff3d2;
  cursor:pointer;
  padding:.6rem .7rem;
  border-radius:8px;
  border:2px solid var(--gold-line);
  background:linear-gradient(180deg, #c1934f, #7a4d24);
  box-shadow:0 0 0 1px #3a2109, inset 0 1px 0 rgba(255,245,210,.5), 0 2px 0 rgba(0,0,0,.35);
}