:root{
    --bg:var(--gray-0); --bg-2:var(--gray-20); --panel:var(--gray-0);
    --text:var(--gray-750); --text-2:var(--gray-500); --text-3:var(--gray-300);
    --brand:var(--violet-400);
    --line:color-mix(in srgb, var(--gray-900) 8%, transparent); --line-strong:color-mix(in srgb, var(--gray-900) 12%, transparent);
    --hover:color-mix(in srgb, var(--gray-750) 4.5%, transparent);
    --shadow-float:0 0 0 1px color-mix(in srgb, var(--gray-900) 5%, transparent), 0 2px 6px color-mix(in srgb, var(--gray-900) 5%, transparent), 0 12px 32px color-mix(in srgb, var(--gray-900) 10%, transparent);
    --ease-exit:cubic-bezier(.215,.61,.355,1);
    --ease-out:cubic-bezier(.16,1,.3,1);
    --ease-spring:cubic-bezier(.34,1.26,.64,1);
    --ok:var(--green-300);
    --dk-bg:var(--gray-900); --dk-text:var(--gray-20); --dk-text2:var(--gray-350); --dk-line:color-mix(in srgb, var(--gray-0) 9%, transparent);
  }
  html[data-theme="dark"]{
    --bg:var(--gray-900); --bg-2:var(--gray-880); --panel:var(--gray-870);
    --text:var(--gray-20); --text-2:var(--gray-350); --text-3:var(--gray-550);
    --brand:var(--violet-450);
    --line:color-mix(in srgb, var(--gray-0) 8%, transparent); --line-strong:color-mix(in srgb, var(--gray-0) 14%, transparent);
    --hover:color-mix(in srgb, var(--gray-0) 5.5%, transparent);
    --shadow-float:0 0 0 1px color-mix(in srgb, var(--gray-0) 8%, transparent), 0 2px 6px color-mix(in srgb, var(--gray-900) 40%, transparent), 0 12px 32px color-mix(in srgb, var(--gray-900) 55%, transparent);
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{color-scheme:light dark;scroll-behavior:smooth}
  body{
    font-family:var(--font);
    font-feature-settings:"cv01","ss03";
    background:var(--bg); color:var(--text);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  button{font:inherit;color:inherit;background:none;border:0;cursor:default}
  input{font:inherit;color:inherit}
  a{color:inherit;text-decoration:none}
  ::selection{background:color-mix(in srgb, var(--brand) 25%, transparent)}

  section{
    min-height:92vh;
    display:flex;flex-direction:column;justify-content:center;align-items:center;
    padding:80px 24px;position:relative;
  }
  .dark-sec{background:var(--dk-bg);color:var(--dk-text)}

  .kick{font-size:12px;font-weight:550;letter-spacing:.4px;text-transform:none;color:var(--text-3);margin-bottom:20px}
  h2{font-size:clamp(40px,5.2vw,64px);font-weight:500;letter-spacing:-0.022em;line-height:1.04;text-align:center;max-width:16ch;text-wrap:balance}
  .sub{margin-top:20px;font-size:17px;line-height:1.55;color:var(--text-2);max-width:46ch;text-align:center;text-wrap:pretty}
  .dark-sec .sub{color:var(--dk-text2)}
  .row{display:flex;align-items:center;gap:12px;margin-top:36px}

  .btn{
    position:relative;height:48px;padding:0 28px;border-radius:9999px;
    font-size:15px;font-weight:550;letter-spacing:-.1px;
    display:inline-flex;align-items:center;gap:9px;overflow:hidden;
    background:var(--text);color:var(--bg);
  }
  .btn .fill{
    position:absolute;left:var(--cx,50%);top:var(--cy,50%);
    width:12px;height:12px;border-radius:9999px;background:var(--brand);
    transform:translate(-50%,-50%) scale(0);
    transition:transform .5s var(--ease-exit);
  }
  .btn:is(:hover, [data-hover]) .fill{transform:translate(-50%,-50%) scale(32)}
  .btn span{position:relative;z-index:1}
  .btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
  .ghost{
    height:48px;padding:0 20px;border-radius:9999px;
    font-size:15px;font-weight:550;color:var(--text-2);
    display:inline-flex;align-items:center;gap:7px;
    transition:color .15s;
  }
  .ghost:is(:hover, [data-hover]){color:var(--text)}
  .ghost .arr{transition:transform .25s var(--ease-out)}
  .ghost:is(:hover, [data-hover]) .arr{transform:translateX(3px)}
  .dark-sec .ghost{color:var(--dk-text2)}
  .dark-sec .ghost:is(:hover, [data-hover]){color:var(--dk-text)}
  /* ============ 07 · CAPTURE ============ */
  .cap{
    display:flex;align-items:center;
    width:min(440px, 90vw);height:56px;border-radius:9999px;
    background:var(--panel);
    box-shadow:inset 0 0 0 1.5px var(--line-strong);
    padding:5px 5px 5px 22px;
    margin-top:36px;
    transition:box-shadow .2s, width .45s var(--ease-spring), background .3s;
  }
  .cap:focus-within{box-shadow:inset 0 0 0 1.5px var(--brand)}
  .cap.err{animation:shake .4s var(--ease-exit)}
  @keyframes shake{20%{transform:translateX(-7px)}45%{transform:translateX(6px)}70%{transform:translateX(-3px)}90%{transform:translateX(2px)}}
  .cap input{flex:1;border:0;outline:0;background:none;font-size:15px;min-width:0}
  .cap input::placeholder{color:var(--text-3)}
  .cap .go{
    flex:none;height:46px;padding:0 20px;border-radius:9999px;
    background:var(--text);color:var(--bg);
    font-size:13px;font-weight:550;
    display:inline-flex;align-items:center;gap:7px;
    transition:opacity .15s, width .3s;
  }
  .cap .go:is(:hover, [data-hover]){opacity:.88}
  .cap.sending{width:56px;padding:5px}
  .cap.sending input, .cap.sending .go{display:none}
  .cap .spin{
    display:none;width:22px;height:22px;margin:auto;border-radius:9999px;
    background:conic-gradient(var(--brand) 0 25%, transparent 25% 100%);
    -webkit-mask:radial-gradient(circle, transparent 55%, var(--gray-900) 56%);
    mask:radial-gradient(circle, transparent 55%, var(--gray-900) 56%);
    animation:b6spin .7s linear infinite;
  }
  @keyframes b6spin{to{transform:rotate(360deg)}}
  .cap.sending .spin{display:block}
  .cap.done{width:230px;background:var(--ok);box-shadow:none;justify-content:center}
  .cap.done .spin{display:none}
  .cap .okmsg{display:none;color:var(--gray-0);font-size:13px;font-weight:550;align-items:center;gap:8px}
  .cap.done .okmsg{display:inline-flex}
  .cap .okmsg svg path{stroke:var(--gray-0);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:20;stroke-dashoffset:20}
  .cap.done .okmsg svg path{animation:draw .4s var(--ease-out) .1s forwards}
  @keyframes draw{to{stroke-dashoffset:0}}
  .cap-note{margin-top:14px;font-size:12px;color:var(--text-3)}

  @media (prefers-reduced-motion: reduce){
    *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto}
  }
body { font-size: 15px; line-height: normal; }
section { min-height: 100vh; }
.cap.sending { border-radius: 9999px; }