:root{
    --bg:#EEF3E6;
    --bg-deep:#E1E9D3;
    --card:#F7FAF1;
    --ink:#1F2E1A;
    --ink-soft:#4C5A45;
    --moss:#4F6B41;
    --leaf:#6E9B52;
    --leaf-soft:#9DBE85;
    --honey:#D9A441;
    --honey-deep:#B5822C;
    --ember:#C1592E;
    --ember-soft:#EAD3C6;
    --blue-dot:#5C87A6;
    --gray-dot:#B9B7A8;
    --line: rgba(31,46,26,0.12);
    --shadow: 0 20px 50px rgba(31,46,26,0.18);
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    min-height:100vh;
    background:
      radial-gradient(circle at 20% -10%, #F4EFD9 0%, transparent 55%),
      linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
    font-family:'Work Sans', sans-serif;
    color:var(--ink);
    display:flex;
    align-items:flex-start;
    justify-content:center;
    padding:40px 16px 80px;
  }
  .device{
    width:100%;
    max-width:400px;
    background:var(--card);
    border-radius:36px;
    box-shadow:var(--shadow);
    border:1px solid rgba(31,46,26,0.08);
    overflow:hidden;
    position:relative;
  }
  .device::before{
    content:"";
    position:absolute;
    top:14px; left:50%;
    transform:translateX(-50%);
    width:64px; height:5px;
    border-radius:3px;
    background:rgba(31,46,26,0.15);
    z-index:5;
  }
  .screen{
    display:none;
    flex-direction:column;
    min-height:640px;
    padding:44px 26px 28px;
    position:relative;
  }
  .screen.active{display:flex;}
  .screen.has-nav{padding-bottom:112px;}
  .eyebrow{
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--moss);
    margin:0 0 10px;
  }
  h1{
    font-family:'Fraunces', serif;
    font-weight:500;
    font-size:25px;
    line-height:1.25;
    margin:0 0 14px;
    letter-spacing:-0.01em;
  }
  h2{
    font-family:'Fraunces', serif;
    font-weight:500;
    font-size:19px;
    margin:0 0 8px;
  }
  p{
    font-size:14.5px;
    line-height:1.6;
    color:var(--ink-soft);
    margin:0 0 18px;
  }
  .grow{flex:1;}
  .btn{
    font-family:'Work Sans', sans-serif;
    font-size:14.5px;
    font-weight:500;
    border:none;
    border-radius:14px;
    padding:15px 20px;
    cursor:pointer;
    text-align:center;
    transition:transform .15s ease, opacity .15s ease;
  }
  .btn:active{transform:scale(0.97);}
  .btn-primary{background:var(--ink); color:var(--card);}
  .btn-honey{background:var(--honey); color:#3A2A0C;}
  .btn-ember{background:var(--ember); color:#FBEFE8;}
  .btn-ghost{background:transparent; color:var(--moss); border:1px solid var(--line); padding:13px 20px;}
  .btn-small{padding:8px 14px; font-size:12.5px; border-radius:10px;}
  .btn:disabled{opacity:0.45; cursor:not-allowed;}
  .stack{display:flex; flex-direction:column; gap:10px;}
  .option-card{
    display:flex; align-items:center; gap:10px;
    border:1px solid var(--line);
    border-radius:16px;
    padding:14px 16px;
    cursor:pointer;
    background:#fff;
    transition:border-color .15s ease, background .15s ease;
  }
  .option-card:hover{border-color:var(--leaf);}
  .option-card.selected{border-color:var(--leaf); background:#F1F7E9;}
  .option-title{font-weight:600; font-size:14px; margin-bottom:3px;}
  .option-body{font-size:13px; color:var(--ink-soft); line-height:1.5;}
  .letter{
    display:inline-flex; align-items:center; justify-content:center;
    width:22px; height:22px; border-radius:50%; flex-shrink:0;
    background:var(--leaf-soft); color:#20330F;
    font-family:'IBM Plex Mono', monospace; font-size:11px; font-weight:500;
    margin-right:8px;
  }
  .check-box{
    width:18px; height:18px; flex-shrink:0;
    border:2px solid var(--line);
    border-radius:6px;
    position:relative;
  }
  .option-card.selected .check-box{background:var(--leaf); border-color:var(--leaf);}
  .option-card.selected .check-box::after{
    content:"✓"; position:absolute; inset:0;
    display:flex; align-items:center; justify-content:center;
    color:#fff; font-size:12px;
  }

  /* topbar / garden */
  .topbar{display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:18px;}
  .stat{display:flex; align-items:center; gap:6px; font-family:'IBM Plex Mono', monospace; font-size:13px; color:var(--ink-soft);}
  .stat b{color:var(--ink); font-weight:500;}
  .topbar-right{display:flex; flex-direction:column; align-items:flex-end; gap:6px;}
  .trophy-btn{
    position:relative;
    background:var(--bg-deep); border:none; border-radius:10px;
    width:30px; height:26px; font-size:14px; cursor:pointer;
    display:flex; align-items:center; justify-content:center;
  }
  .achv-dot{
    display:none; position:absolute; top:-3px; right:-3px;
    width:9px; height:9px; border-radius:50%; background:var(--ember);
  }
  .achv-dot.show{display:block;}
  .plant-wrap{
    position:relative;
    border-radius:24px;
    background:radial-gradient(circle at 50% 30%, #F6EFD6 0%, var(--card) 60%);
    padding:10px 0 0;
    margin-bottom:18px;
    overflow:hidden;
  }
  .companion-wrap{position:absolute; right:16px; bottom:8px; display:none;}
  .day-pill{
    align-self:flex-start;
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    background:var(--bg-deep);
    color:var(--moss);
    padding:5px 12px;
    border-radius:999px;
    margin-bottom:14px;
  }
  .status-line{
    font-size:13px;
    color:var(--ink-soft);
    text-align:center;
    margin:-6px 0 16px;
  }
  .action-row{display:flex; gap:10px; align-items:flex-start;}
  .action-row > *{flex:1;}
  .action-col{display:flex; flex-direction:column; gap:4px;}
  .action-caption{text-align:center; font-size:10.5px; color:var(--ink-soft);}
  .invite-link{
    display:flex; gap:8px; align-items:center; justify-content:space-between;
    border:1px dashed var(--line);
    border-radius:12px;
    padding:10px 12px;
    margin-top:12px;
    font-family:'IBM Plex Mono', monospace;
    font-size:12px;
    color:var(--ink-soft);
  }

  /* modal */
  .modal-backdrop{
    display:none;
    position:absolute; inset:0;
    background:rgba(31,46,26,0.35);
    align-items:flex-end;
    z-index:20;
    border-radius:36px;
  }
  .modal-backdrop.active{display:flex;}
  .modal{
    background:var(--card);
    width:100%;
    border-radius:24px 24px 0 0;
    padding:26px 24px 24px;
    max-height:88%;
    overflow-y:auto;
  }
  .checkin-option{
    display:flex; align-items:flex-start; gap:10px;
    border:1px solid var(--line);
    border-radius:16px;
    padding:14px;
    margin-bottom:10px;
    cursor:pointer;
    background:#fff;
  }
  .checkin-option:hover{border-color:var(--leaf);}
  .checkin-emoji{font-size:20px; line-height:1;}
  .tip-box{
    background:var(--ember-soft);
    border-radius:16px;
    padding:16px;
    margin-bottom:14px;
  }
  .tip-box p{margin:0; color:#5A2A11; font-size:14px;}
  .small-note{font-size:12px; color:var(--ink-soft); margin-top:10px;}

  /* dev tools */
  .dev-toggle{
    position:absolute; top:14px; right:14px;
    width:28px; height:28px;
    border-radius:50%;
    background:rgba(31,46,26,0.06);
    border:none;
    font-size:13px;
    cursor:pointer;
    z-index:35;
    display:none;
  }
  .device.app-mode .dev-toggle{display:block;}
  .dev-panel{
    display:none;
    position:absolute; top:50px; right:14px;
    width:200px;
    background:var(--bg-deep);
    border-radius:14px;
    padding:12px 14px;
    font-family:'IBM Plex Mono', monospace;
    font-size:11px;
    color:var(--ink-soft);
    z-index:35;
  }
  .dev-panel.active{display:block;}
  .dev-panel .row{display:flex; gap:8px; margin-top:8px;}
  .dev-panel button{
    flex:1; font-family:'IBM Plex Mono', monospace;
    font-size:10.5px; padding:8px 6px; border-radius:8px; border:1px solid var(--line);
    background:#fff; cursor:pointer;
  }

  /* toast */
  .toast{
    position:absolute; top:16px; left:50%; transform:translateX(-50%);
    background:var(--ink); color:var(--card);
    font-size:12.5px; padding:9px 18px; border-radius:999px;
    z-index:40; opacity:0; pointer-events:none;
    transition:opacity .25s ease;
    white-space:nowrap;
    max-width:80%;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .toast.show{opacity:1;}

  /* achievement toast: slides in from the right, pulses, holds, slides back out */
  .achv-toast{
    position:absolute; top:64px; left:50%;
    transform:translateX(420px);
    background:var(--honey); color:#3A2A0C;
    font-weight:600; font-size:13px;
    padding:10px 20px; border-radius:999px;
    z-index:45; pointer-events:none;
    white-space:nowrap;
    transition:transform .5s cubic-bezier(.22,.85,.32,1.1);
  }
  .achv-toast.show{transform:translateX(-50%);}
  .achv-toast.pulse{animation:achvGlow .6s ease-out;}
  @keyframes achvGlow{
    0%{box-shadow:0 0 0 0 rgba(217,164,65,0.7);}
    50%{box-shadow:0 0 20px 7px rgba(217,164,65,0.55);}
    100%{box-shadow:0 0 0 0 rgba(217,164,65,0);}
  }

  /* companion reveal */
  .reveal-backdrop{
    display:none; position:absolute; inset:0; z-index:22;
    background:rgba(31,46,26,0.45);
    align-items:flex-start; justify-content:center; padding:26px; padding-top:56px;
    border-radius:36px;
  }
  .reveal-backdrop.active{display:flex;}
  .reveal-card{
    background:var(--card); border-radius:24px; padding:30px 24px;
    width:100%; box-shadow:0 20px 40px rgba(31,46,26,0.25);
  }

  /* confetti */
  .confetti-layer{
    position:absolute; inset:0; z-index:25;
    pointer-events:none; overflow:hidden; border-radius:36px;
  }
  .confetti-piece{
    position:absolute; top:-10px; width:8px; height:8px; border-radius:2px;
    animation-name:confettiFall; animation-timing-function:ease-in;
    animation-fill-mode:forwards; pointer-events:none;
  }
  @keyframes confettiFall{
    0%{transform:translateY(-10px) rotate(0deg); opacity:1;}
    100%{transform:translateY(420px) rotate(300deg); opacity:0;}
  }
  .firework-burst{
    position:absolute; width:70px; height:70px; border-radius:50%;
    pointer-events:none; animation:fireworkPulse 1.1s ease-out forwards;
  }
  @keyframes fireworkPulse{
    0%{transform:scale(0.2); opacity:0.85;}
    70%{opacity:0.3;}
    100%{transform:scale(2.4); opacity:0;}
  }

  /* bottom nav */
  .bottom-nav{
    display:none;
    position:absolute; left:14px; right:14px; bottom:14px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:20px;
    padding:6px 4px;
    box-shadow:0 8px 20px rgba(31,46,26,0.12);
    z-index:15;
  }
  .device.app-mode .bottom-nav{display:flex;}
  .nav-item{
    flex:1; display:flex; flex-direction:column; align-items:center; gap:2px;
    background:none; border:none; cursor:pointer;
    padding:8px 2px; border-radius:14px;
    font-family:'Work Sans', sans-serif;
    color:var(--ink-soft);
    position:relative;
  }
  .nav-item.active{background:var(--bg-deep); color:var(--moss);}
  .nav-icon{font-size:18px; position:relative;}
  .nav-label{font-size:9.5px; line-height:1.15; text-align:center; max-width:70px;}
  .nav-badge{
    display:none;
    position:absolute; top:-3px; right:-6px;
    width:14px; height:14px; border-radius:50%;
    background:var(--leaf); color:#fff;
    font-size:9px; align-items:center; justify-content:center;
  }
  .nav-badge.show{display:flex;}
  .nav-badge-alert{background:var(--ember);}

  /* squash & stretch tap feedback */
  .tappable{cursor:pointer; transform-origin:50% 100%;}
  @keyframes squashStretch{
    0%{transform:scale(1,1);}
    30%{transform:scale(1.14,0.86);}
    55%{transform:scale(0.92,1.1);}
    78%{transform:scale(1.04,0.97);}
    100%{transform:scale(1,1);}
  }
  .squash{animation:squashStretch .5s ease-in-out;}

  /* speech bubble */
  .speech-bubble{
    position:absolute; bottom:100%; left:50%;
    transform:translateX(-50%) scale(0.85);
    background:#fff; border:1px solid var(--line); border-radius:14px;
    padding:6px 12px; font-size:12px; font-weight:600; color:var(--ink);
    white-space:nowrap; margin-bottom:10px; opacity:0; pointer-events:none;
    transition:opacity .18s ease, transform .18s ease;
    box-shadow:0 6px 14px rgba(31,46,26,0.15); z-index:5;
  }
  .speech-bubble::after{
    content:""; position:absolute; top:100%; left:50%; transform:translateX(-50%);
    border:6px solid transparent; border-top-color:#fff;
  }
  .speech-bubble.show{opacity:1; transform:translateX(-50%) scale(1);}

  /* calendar */
  .legend{display:flex; flex-wrap:wrap; gap:10px 14px; font-size:11px; color:var(--ink-soft); margin-bottom:14px;}
  .legend span{display:flex; align-items:center; gap:5px;}
  .dot{width:9px; height:9px; border-radius:50%; display:inline-block;}
  .dot-green{background:var(--leaf);}
  .dot-gray{background:var(--gray-dot);}
  .dot-red{background:var(--ember);}
  .dot-blue{background:var(--blue-dot);}
  .forgive-balance{
    font-family:'IBM Plex Mono', monospace; font-size:12px; color:var(--ink-soft);
    background:var(--bg-deep); border-radius:10px; padding:8px 12px; margin-bottom:16px;
  }
  .cal-weekdays{display:grid; grid-template-columns:repeat(7,1fr); font-size:11px; color:var(--moss); text-align:center; margin-bottom:6px;}
  .cal-grid{display:grid; grid-template-columns:repeat(7,1fr); gap:6px 2px;}
  .cal-cell{display:flex; flex-direction:column; align-items:center; gap:4px; padding:4px 0; border-radius:10px; background:none; border:none; cursor:default; font-family:'Work Sans', sans-serif;}
  .cal-cell.clickable{cursor:pointer;}
  .cal-cell .num{font-size:10.5px; color:var(--ink-soft);}
  .cal-cell .cdot{width:12px; height:12px; border-radius:50%;}
  .cal-cell.today{box-shadow:0 0 0 1.5px var(--leaf) inset; border-radius:10px;}

  /* friends */
  .friend-card{
    display:flex; align-items:center; justify-content:space-between;
    border:1px solid var(--line); border-radius:16px; padding:12px 14px;
    background:#fff; margin-bottom:10px;
  }
  .friend-name{font-weight:600; font-size:14px; margin-bottom:4px;}
  .friend-stats{display:flex; gap:6px; flex-wrap:wrap;}
  .stat-chip{
    display:inline-flex; align-items:center; gap:2px;
    background:var(--bg-deep); border-radius:8px; padding:4px 7px;
    font-family:'IBM Plex Mono', monospace; font-size:10.5px; color:var(--ink-soft);
  }
  .pending-card{
    border:1px solid var(--honey); border-radius:16px; padding:14px;
    background:#FBF4E4; margin-bottom:10px;
  }
  .search-result-card{
    display:flex; align-items:center; justify-content:space-between;
    border:1px solid var(--line); border-radius:14px; padding:10px 12px;
    background:#fff; margin-bottom:8px;
  }
  .back-link{
    font-size:12.5px; color:var(--moss); background:none; border:none; cursor:pointer;
    padding:0; margin-bottom:14px; display:flex; align-items:center; gap:4px;
  }

  /* tips */
  .tip-card{
    background:#fff; border:1px solid var(--line); border-radius:18px;
    padding:20px; margin-bottom:16px; position:relative;
  }
  .tip-card p{margin:0; font-family:'Fraunces', serif; font-size:17px; line-height:1.5; color:var(--ink);}
  .collected-note{
    display:flex; align-items:center; gap:6px;
    font-size:13px; color:var(--moss); font-weight:500;
  }

  /* achievements */
  .achv-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:10px;}
  .achv-card{
    background:#fff; border:1px solid var(--line); border-radius:14px;
    padding:10px 6px 12px; display:flex; flex-direction:column; align-items:center;
    gap:5px; text-align:center; min-height:98px; justify-content:center; position:relative;
  }
  .achv-card .icon{font-size:20px;}
  .achv-card .name{font-size:9.5px; line-height:1.25; font-weight:500; color:var(--ink);}
  .achv-card.locked{opacity:0.5;}
  .achv-card.locked .name{color:var(--ink-soft);}
  .achv-card .progress{font-family:'IBM Plex Mono', monospace; font-size:9px; color:var(--ink-soft);}
  .achv-card.claimable{border-color:var(--leaf); background:#F1F7E9;}
  .achv-card .claim-btn{
    margin-top:2px; font-size:9.5px; padding:5px 8px; border-radius:8px; border:none;
    background:var(--honey); color:#3A2A0C; cursor:pointer; font-family:'Work Sans', sans-serif; font-weight:500;
  }
  .achv-card .check-badge{
    position:absolute; top:6px; right:6px; width:14px; height:14px; border-radius:50%;
    background:var(--leaf); color:#fff; font-size:9px; display:flex; align-items:center; justify-content:center;
  }