:root{
    --ink:#20231d;
    --ink-soft:#686d60;
    --ink-muted:#8a8e82;
    --paper:#f5f1e6;
    --paper-warm:#ebe5d5;
    --paper-soft:#faf8f1;
    --card:#fffdf7;
    --line:#ddd4bf;
    --line-soft:rgba(75,70,55,.12);
    --accent:#56683e;
    --accent-dark:#334126;
    --accent-soft:#93a676;
    --gold:#b38a42;
    --shadow:0 20px 60px rgba(63,58,42,.12);
    --shadow-soft:0 10px 30px rgba(63,58,42,.08);
    --font-display:'Songti SC','STSong','Noto Serif SC',serif;
    --font-sans:-apple-system,BlinkMacSystemFont,'PingFang SC','Helvetica Neue',Arial,sans-serif;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    min-height:100vh;
    background:
      radial-gradient(circle at 12% 7%,rgba(178,151,91,.20),transparent 30%),
      radial-gradient(circle at 84% 8%,rgba(96,126,74,.18),transparent 28%),
      linear-gradient(180deg,#f8f4ea 0%,var(--paper) 52%,#eee8d9 100%);
    color:var(--ink);
    font-family:var(--font-sans);
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    padding:clamp(1rem,3vw,2.5rem);
  }
  button,input,label{font-family:inherit;}
  button,label{touch-action:manipulation;}
  .wrap{max-width:1240px;margin:0 auto;}

  .head{
    position:relative;
    overflow:hidden;
    border:1px solid var(--line-soft);
    border-radius:28px;
    background:linear-gradient(135deg,rgba(255,253,247,.92),rgba(239,232,215,.82));
    box-shadow:var(--shadow-soft);
    padding:clamp(1.4rem,4vw,2.6rem);
  }
  .head::before{
    content:"";
    position:absolute;
    width:360px;height:360px;right:-130px;top:-190px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(86,104,62,.22),rgba(86,104,62,0) 68%);
    pointer-events:none;
  }
  .head::after{
    content:"";
    position:absolute;left:0;right:0;bottom:0;height:5px;
    background:linear-gradient(90deg,#9bbf6a,#5b6fa3,#d4b07a,#8a7560);
    opacity:.72;
  }
  .head-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1.5rem;align-items:end;}
  .eyebrow{font-size:.72rem;letter-spacing:.26em;color:var(--accent);text-transform:uppercase;margin-bottom:.7rem;font-weight:700;}
  .title{font-family:var(--font-display);font-size:clamp(2rem,5vw,4rem);font-weight:600;letter-spacing:.045em;line-height:1.02;}
  .subtitle{margin-top:.85rem;color:var(--ink-soft);font-size:.96rem;max-width:62ch;}
  .hero-tags{display:flex;gap:.45rem;flex-wrap:wrap;justify-content:flex-end;}
  .hero-tag{font-size:.72rem;color:var(--accent-dark);border:1px solid rgba(86,104,62,.18);background:rgba(255,255,255,.48);border-radius:999px;padding:.35rem .65rem;backdrop-filter:blur(8px);}
  .guide-strip{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:.6rem;margin-top:1.35rem;}
  .guide-item{border:1px solid var(--line-soft);border-radius:16px;background:rgba(255,253,247,.72);padding:.75rem .85rem;box-shadow:0 8px 20px rgba(63,58,42,.04);}
  .guide-num{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--accent);color:#fff;font-size:.68rem;margin-right:.45rem;}
  .guide-text{font-size:.78rem;color:var(--ink-soft);font-weight:600;}

  .stage{display:grid;grid-template-columns:360px minmax(0,1fr);gap:1.25rem;margin-top:1.25rem;align-items:start;}
  aside,.out-card{border:1px solid var(--line-soft);border-radius:24px;background:rgba(255,253,247,.86);box-shadow:var(--shadow-soft);backdrop-filter:blur(18px);}
  aside{padding:1rem;}
  .out-card{padding:1.1rem;}
  .control-section{border:1px solid rgba(221,212,191,.72);background:rgba(250,248,241,.78);border-radius:18px;padding:.85rem;margin-bottom:.75rem;}
  .control-section:last-child{margin-bottom:0;}
  .panel-label{display:flex;align-items:center;gap:.45rem;font-size:.72rem;letter-spacing:.12em;color:var(--ink-soft);text-transform:uppercase;margin-bottom:.65rem;font-weight:700;}
  .step-dot{display:inline-grid;place-items:center;width:1.35rem;height:1.35rem;border-radius:50%;background:var(--accent);color:#fff;font-size:.68rem;letter-spacing:0;flex:0 0 auto;}
  .step-tip{font-size:.74rem;color:var(--ink-muted);line-height:1.45;margin-top:.52rem;}

  .plant-list{display:grid;grid-template-columns:1fr;gap:.42rem;max-height:320px;overflow-y:auto;padding-right:.25rem;margin-bottom:.75rem;scrollbar-width:thin;}
  .plant-chip{display:flex;align-items:center;gap:.62rem;padding:.55rem .6rem;border:1px solid rgba(221,212,191,.88);border-radius:12px;background:rgba(255,253,247,.72);cursor:pointer;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease,background .16s ease;user-select:none;}
  .plant-chip:hover{border-color:rgba(86,104,62,.42);transform:translateY(-1px);box-shadow:0 8px 18px rgba(63,58,42,.07);}
  .plant-chip.active{border-color:var(--accent);background:#fff;box-shadow:0 0 0 2px rgba(86,104,62,.14),0 10px 22px rgba(63,58,42,.08);}
  .chip-swatch{display:flex;border-radius:7px;overflow:hidden;flex-shrink:0;border:1px solid rgba(0,0,0,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.15);}
  .chip-swatch span{width:10px;height:28px;display:block;}
  .chip-name{font-size:.86rem;font-weight:650;line-height:1.25;}
  .chip-latin{font-size:.63rem;color:var(--ink-muted);font-style:italic;line-height:1.35;margin-top:.08rem;}

  .tool-row{display:flex;gap:.45rem;margin-bottom:.2rem;flex-wrap:wrap;}
  .tool-btn,.btn{font-size:.76rem;padding:.52rem .78rem;border-radius:999px;border:1px solid rgba(221,212,191,.95);background:rgba(255,253,247,.82);cursor:pointer;transition:transform .15s ease,border-color .15s ease,background .15s ease,box-shadow .15s ease;color:var(--ink);}
  .tool-btn:hover,.btn:hover{border-color:rgba(86,104,62,.45);transform:translateY(-1px);box-shadow:0 8px 18px rgba(63,58,42,.07);}
  .tool-btn.on{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 8px 18px rgba(86,104,62,.18);}
  .tool-btn.ghost{background:rgba(239,232,215,.62);}
  .tool-btn.sample{background:var(--ink);color:#fff;border-color:var(--ink);}

  .paint-wrap{position:relative;border-radius:18px;overflow:hidden;background:linear-gradient(135deg,#f7f2e5,#e8dfca);box-shadow:inset 0 0 0 1px rgba(255,255,255,.45);}
  #baseImg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:18px;opacity:.48;pointer-events:none;display:none;filter:saturate(.82) contrast(.95);}
  .paint-grid{display:grid;border:1px solid rgba(86,104,62,.18);border-radius:18px;overflow:hidden;background:rgba(235,229,213,.56);touch-action:none;aspect-ratio:1/1.08;position:relative;}
  .paint-grid::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(135deg,rgba(255,255,255,.18),transparent 45%);}
  .paint-grid.has-img{background:transparent;}
  .pcell{border:.5px solid rgba(42,43,35,.045);cursor:crosshair;transition:background .08s ease,box-shadow .08s ease;}
  .pcell.site{box-shadow:inset 0 0 0 1px rgba(86,104,62,.38);}
  .hint{font-size:.74rem;color:var(--ink-soft);margin-top:.72rem;line-height:1.55;background:rgba(250,248,241,.72);border:1px dashed rgba(86,104,62,.22);border-radius:14px;padding:.7rem .8rem;}

  .out-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:.95rem;flex-wrap:wrap;gap:.7rem;}
  .result-title{display:flex;flex-direction:column;gap:.16rem;}
  .result-title strong{font-family:var(--font-display);font-size:1.15rem;letter-spacing:.04em;}
  .result-title span{font-size:.74rem;color:var(--ink-muted);}
  .season-tabs{display:flex;gap:.35rem;background:rgba(239,232,215,.64);padding:.25rem;border-radius:999px;border:1px solid var(--line-soft);}
  .season-tab{padding:.38rem .82rem;border:0;background:transparent;border-radius:999px;font-size:.78rem;cursor:pointer;transition:.16s ease;color:var(--ink-soft);font-weight:650;}
  .season-tab.active{background:var(--accent);color:#fff;box-shadow:0 8px 18px rgba(86,104,62,.16);}

  .canvas-shell{border:1px solid rgba(221,212,191,.76);border-radius:22px;background:linear-gradient(180deg,#fffdf7,#f2ecdc);padding:.75rem;box-shadow:inset 0 1px 0 rgba(255,255,255,.8);}
  .canvas-hold{position:relative;border-radius:16px;overflow:hidden;border:1px solid rgba(86,104,62,.14);background:#e8e3d5;aspect-ratio:1/1.04;box-shadow:inset 0 0 50px rgba(80,76,58,.06);}
  #outCanvas{width:100%;height:100%;display:block;}
  .canvas-empty{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:var(--ink-soft);padding:2rem;background:radial-gradient(circle at center,rgba(255,253,247,.62),rgba(235,229,213,.52));}
  .canvas-empty .big{font-family:var(--font-display);font-size:1.22rem;color:var(--ink);margin-bottom:.35rem;}
  .result-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:.55rem;margin-top:.7rem;}
  .meta-pill{border:1px solid var(--line-soft);background:rgba(255,253,247,.78);border-radius:14px;padding:.62rem .7rem;}
  .meta-label{display:block;font-size:.66rem;color:var(--ink-muted);letter-spacing:.12em;text-transform:uppercase;}
  .meta-value{display:block;font-size:.85rem;color:var(--ink);font-weight:650;margin-top:.1rem;}

  .time-zone{margin-top:1rem;border:1px solid rgba(221,212,191,.76);border-radius:18px;background:rgba(250,248,241,.72);padding:.9rem;}
  .time-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:.65rem;gap:1rem;}
  .time-label{font-size:.78rem;color:var(--ink-soft);font-weight:700;}
  .time-stage{font-family:var(--font-display);font-size:1.03rem;color:var(--accent);font-weight:600;white-space:nowrap;}
  input[type=range]{width:100%;-webkit-appearance:none;height:5px;background:linear-gradient(90deg,var(--accent),#c9b784);border-radius:999px;outline:none;}
  input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:21px;height:21px;border-radius:50%;background:var(--accent-dark);cursor:pointer;border:4px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.24);}
  input[type=range]::-moz-range-thumb{width:21px;height:21px;border-radius:50%;background:var(--accent-dark);cursor:pointer;border:4px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.24);}
  .time-ticks{display:flex;justify-content:space-between;margin-top:.52rem;font-size:.7rem;color:var(--ink-muted);}
  .time-note{margin-top:.8rem;font-size:.83rem;color:var(--ink-soft);background:#fffdf7;border-left:3px solid var(--accent-soft);padding:.72rem .85rem;border-radius:0 12px 12px 0;line-height:1.55;min-height:2.5rem;}
  .actions{margin-top:.85rem;display:flex;gap:.55rem;flex-wrap:wrap;justify-content:flex-end;}
  .btn-primary{background:var(--accent);color:#fff;border-color:var(--accent);}
  .btn-light{background:#fffdf7;}

  @media(max-width:980px){
    .head-inner{grid-template-columns:1fr;align-items:start;}
    .hero-tags{justify-content:flex-start;}
    .guide-strip{grid-template-columns:repeat(2,1fr);}
    .stage{grid-template-columns:1fr;}
    aside{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;}
    .control-section{margin-bottom:0;}
    .control-section.paint-area{grid-column:1/-1;}
    .plant-list{max-height:260px;}
  }
  @media(max-width:680px){
    body{padding:.8rem;}
    .head{border-radius:22px;padding:1.2rem;}
    .guide-strip{grid-template-columns:1fr;}
    aside{display:block;padding:.8rem;}
    .control-section{margin-bottom:.7rem;padding:.75rem;}
    .out-card{padding:.8rem;border-radius:22px;}
    .season-tabs{width:100%;display:grid;grid-template-columns:repeat(4,1fr);}
    .season-tab{text-align:center;padding:.42rem .3rem;}
    .canvas-shell{padding:.5rem;}
    .result-meta{grid-template-columns:1fr;}
    .actions{justify-content:stretch;}
    .actions .btn{flex:1;}
    .time-head{align-items:flex-start;flex-direction:column;gap:.2rem;}
  }

  .bl-back-link{
    position:fixed;
    left:clamp(.9rem,2vw,1.4rem);
    top:clamp(.9rem,2vw,1.4rem);
    z-index:60;
    display:inline-flex;
    align-items:center;
    gap:.35rem;
    padding:.55rem .82rem;
    border:1px solid rgba(221,212,191,.86);
    border-radius:999px;
    background:rgba(255,253,247,.82);
    color:var(--ink);
    text-decoration:none;
    font-size:.76rem;
    box-shadow:0 10px 28px rgba(63,58,42,.10);
    backdrop-filter:blur(16px);
  }
  .bl-back-link:hover{border-color:rgba(86,104,62,.45);transform:translateY(-1px);}
  @media(max-width:680px){.bl-back-link{position:static;margin:0 0 .75rem 0;}}