/* =========================================================
   LIQUID GLASS DESIGN SYSTEM
   ---------------------------------------------------------
   共用玻璃質感風格表，供 dotwebsite.cc 旗下工具頁面套用。
   使用方式：<link rel="stylesheet" href="style.css">

   共用元件 class：
   - .panel / .panel.active      玻璃卡片容器
   - nav button / .active        頁籤按鈕
   - .btn / .btn.ghost           主要 / 次要按鈕
   - input[type="text"]          玻璃輸入框
   - .blob-field / .blob         背景流動光斑（需搭配 3 個 .blob div）
   若新增工具頁面，只要沿用以上 class 即可維持一致風格。
   ========================================================= */

  :root{
    --ink:#20242E;
    --ink-soft:#666F7E;
    --ink-faint:#9AA3B0;
    --accent:#5B8DEF;
    --accent-2:#7FD8C8;
    --accent-3:#F2B6C6;
    --danger:#E1685C;
    --ok:#3FAE7F;
    --glass:rgba(255,255,255,0.5);
    --glass-strong:rgba(255,255,255,0.72);
    --glass-border:rgba(255,255,255,0.75);
    --shadow-lo:0 1px 2px rgba(32,36,46,0.06);
    --shadow-md:0 10px 30px -8px rgba(32,36,46,0.18);
    --shadow-lg:0 20px 50px -12px rgba(32,36,46,0.22);
    --radius-lg:26px;
    --radius-md:16px;
    --radius-sm:12px;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    min-height:100vh;
    color:var(--ink);
    font-family:'Inter', -apple-system, sans-serif;
    padding:32px 16px 72px;
    position:relative;
    overflow-x:hidden;
    background:linear-gradient(160deg,#F3F5FA 0%,#EEF3F1 45%,#F7F1EC 100%);
  }

  /* ---- 液態玻璃背景光斑 ---- */
  .blob-field{position:fixed;inset:0;z-index:-1;overflow:hidden;}
  .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:0.55;}
  .blob-a{width:480px;height:480px;top:-140px;left:-120px;background:radial-gradient(circle at 30% 30%, var(--accent), transparent 70%);animation:float1 22s ease-in-out infinite alternate;}
  .blob-b{width:420px;height:420px;bottom:-160px;right:-100px;background:radial-gradient(circle at 60% 40%, var(--accent-2), transparent 70%);animation:float2 26s ease-in-out infinite alternate;}
  .blob-c{width:360px;height:360px;top:40%;right:15%;background:radial-gradient(circle at 50% 50%, var(--accent-3), transparent 70%);animation:float3 30s ease-in-out infinite alternate;opacity:0.4;}
  @keyframes float1{0%{transform:translate(0,0) scale(1);}100%{transform:translate(60px,80px) scale(1.15);}}
  @keyframes float2{0%{transform:translate(0,0) scale(1);}100%{transform:translate(-70px,-50px) scale(1.1);}}
  @keyframes float3{0%{transform:translate(0,0) scale(1);}100%{transform:translate(-40px,60px) scale(0.9);}}

  .wrap{max-width:920px;margin:0 auto;position:relative;}

  header{
    display:flex;justify-content:space-between;align-items:flex-end;
    padding:20px 26px;margin-bottom:26px;flex-wrap:wrap;gap:12px;
    background:var(--glass);
    -webkit-backdrop-filter:blur(24px) saturate(160%);
    backdrop-filter:blur(24px) saturate(160%);
    border:1px solid var(--glass-border);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.7);
  }
  header .title{font-weight:700;font-size:24px;letter-spacing:-0.3px;color:var(--ink);}
  header .title small{
    display:block;font-family:'JetBrains Mono',monospace;font-weight:500;
    font-size:11px;color:var(--accent);letter-spacing:2px;margin-bottom:6px;text-transform:uppercase;
  }
  header .meta{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--ink-soft);text-align:right;line-height:1.7;}

  nav{display:flex;gap:10px;margin-bottom:22px;flex-wrap:wrap;}
  nav button{
    font-family:'Inter',sans-serif;font-weight:600;font-size:13px;
    background:var(--glass);color:var(--ink-soft);
    border:1px solid var(--glass-border);
    -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    padding:11px 20px;cursor:pointer;letter-spacing:0.1px;
    border-radius:999px;transition:all .2s ease;box-shadow:var(--shadow-lo);
  }
  nav button.active{
    color:#fff;background:linear-gradient(135deg, var(--accent), #7C9BFA);
    border-color:transparent;box-shadow:0 8px 20px -6px rgba(91,141,239,0.55), inset 0 1px 0 rgba(255,255,255,0.4);
  }
  nav button:disabled{color:var(--ink-faint);background:rgba(255,255,255,0.3);cursor:not-allowed;box-shadow:none;}
  nav button:not(.active):not(:disabled):hover{transform:translateY(-1px);box-shadow:var(--shadow-md);color:var(--ink);}

  .panel{
    background:var(--glass);
    -webkit-backdrop-filter:blur(28px) saturate(170%);
    backdrop-filter:blur(28px) saturate(170%);
    border:1px solid var(--glass-border);
    border-radius:var(--radius-lg);
    padding:32px;position:relative;display:none;
    box-shadow:var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.7);
  }
  .panel.active{display:block;}

  .panel h2{font-size:19px;font-weight:700;margin:0 0 4px;color:var(--ink);letter-spacing:-0.2px;}
  .panel .tag{
    font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--accent);
    letter-spacing:2px;margin-bottom:20px;display:block;text-transform:uppercase;
  }

  label{display:block;font-size:11px;color:var(--ink-soft);letter-spacing:0.5px;margin-bottom:7px;font-weight:500;}
  input[type="text"], textarea{
    width:100%;background:rgba(255,255,255,0.55);
    border:1px solid rgba(255,255,255,0.9);
    color:var(--ink);font-family:'Inter',sans-serif;font-size:14px;
    padding:12px 14px;outline:none;border-radius:var(--radius-md);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    box-shadow:inset 0 1px 3px rgba(32,36,46,0.06);
    transition:box-shadow .2s, border-color .2s;
  }
  input[type="text"]:focus, textarea:focus{
    border-color:var(--accent);
    box-shadow:0 0 0 4px rgba(91,141,239,0.18), inset 0 1px 3px rgba(32,36,46,0.06);
  }

  .btn{
    font-family:'Inter',sans-serif;font-weight:600;font-size:13px;
    background:linear-gradient(135deg, var(--accent), #7C9BFA);
    color:#fff;border:none;border-radius:999px;
    padding:12px 22px;cursor:pointer;letter-spacing:0.1px;
    box-shadow:0 8px 20px -6px rgba(91,141,239,0.5), inset 0 1px 0 rgba(255,255,255,0.35);
    transition:transform .15s ease, box-shadow .15s ease;
  }
  .btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px -6px rgba(91,141,239,0.6), inset 0 1px 0 rgba(255,255,255,0.4);}
  .btn:active{transform:translateY(0) scale(0.97);}
  .btn.ghost{
    background:rgba(255,255,255,0.5);color:var(--ink);
    border:1px solid rgba(255,255,255,0.9);box-shadow:var(--shadow-lo);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .btn.ghost:hover{background:rgba(255,255,255,0.75);box-shadow:var(--shadow-md);}
  .btn:disabled{opacity:0.4;cursor:not-allowed;transform:none;box-shadow:none;}

  .row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;}
  .row > div{flex:1;min-width:220px;}

  /* QR TOOL */
  #qrOutput{
    margin-top:24px;display:flex;align-items:center;gap:24px;flex-wrap:wrap;
    border-top:1px solid rgba(255,255,255,0.6);padding-top:24px;
  }
  #qrCanvasBox{
    background:#fff;padding:14px;line-height:0;border-radius:var(--radius-md);
    box-shadow:var(--shadow-md);
  }
  #qrOutput.hidden{display:none;}
  .qr-meta{font-size:12px;color:var(--ink-soft);line-height:1.8;max-width:280px;word-break:break-all;}
  .qr-meta b{color:var(--ink);}

  /* WHEEL TOOL */
  .wheel-layout{display:flex;gap:32px;flex-wrap:wrap;align-items:flex-start;}
  .wheel-stage{
    position:relative;width:320px;flex:0 0 320px;padding:14px;
    background:rgba(255,255,255,0.4);border-radius:50%;
    box-shadow:var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.7);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .wheel-pointer{
    position:absolute;top:2px;left:50%;transform:translateX(-50%);
    width:0;height:0;border-left:14px solid transparent;border-right:14px solid transparent;
    border-top:22px solid var(--accent);z-index:2;
    filter:drop-shadow(0 4px 8px rgba(91,141,239,0.5));
  }
  #wheelCanvas{width:100%;height:100%;border-radius:50%;transition:transform 3.2s cubic-bezier(.15,.85,.25,1);box-shadow:0 0 0 6px rgba(255,255,255,0.5);}
  .wheel-controls{flex:1;min-width:260px;}
  .entry-list{margin:14px 0;display:flex;flex-direction:column;gap:8px;max-height:260px;overflow-y:auto;}
  .entry-row{display:flex;gap:8px;align-items:center;}
  .entry-row input{flex:1;}
  .entry-row .swatch{width:14px;height:14px;flex:0 0 14px;border-radius:50%;border:1px solid rgba(255,255,255,0.8);box-shadow:var(--shadow-lo);}
  .entry-row .rm{
    background:rgba(255,255,255,0.5);border:1px solid rgba(225,104,92,0.5);color:var(--danger);
    width:30px;height:30px;cursor:pointer;font-family:monospace;flex:0 0 30px;
    border-radius:50%;transition:all .15s;
  }
  .entry-row .rm:hover{background:rgba(225,104,92,0.15);}
  .winner-box{
    margin-top:18px;padding:18px 20px;border:1px solid rgba(63,174,127,0.4);
    background:rgba(63,174,127,0.1);border-radius:var(--radius-md);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    display:none;box-shadow:var(--shadow-md);
  }
  .winner-box.show{display:block;}
  .winner-box .tag{color:var(--ok);}
  .winner-box .name{font-size:20px;font-weight:700;color:var(--ink);}

  .history-box{margin-top:22px;border-top:1px solid rgba(255,255,255,0.6);padding-top:18px;}
  .history-box .tag{color:var(--ink-soft);}
  .history-list{margin-top:10px;display:flex;flex-direction:column;gap:6px;max-height:180px;overflow-y:auto;}
  .history-empty{font-size:12px;color:var(--ink-faint);}
  .history-row{
    display:flex;justify-content:space-between;gap:10px;font-size:12px;
    padding:9px 12px;border:1px solid rgba(255,255,255,0.7);background:rgba(255,255,255,0.4);
    border-radius:var(--radius-sm);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  }
  .history-row .h-name{color:var(--ink);font-weight:600;}
  .history-row .h-time{font-family:'JetBrains Mono',monospace;color:var(--ink-faint);flex:0 0 auto;}
  .restore-banner{
    margin-bottom:18px;padding:14px 18px;border:1px solid rgba(91,141,239,0.35);
    background:rgba(91,141,239,0.1);border-radius:var(--radius-md);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    font-size:12px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  }
  .restore-banner span{color:#3E68C7;}

  .soon{opacity:0.55;}
  .soon .panel-inner{text-align:center;padding:40px 0;color:var(--ink-soft);font-size:13px;}

  footer{
    margin-top:40px;text-align:center;font-family:'JetBrains Mono',monospace;
    font-size:11px;color:var(--ink-faint);letter-spacing:1px;
  }