:root{
  --bg-1:#F3EFE0; /* ベース背景 */
  --bg-2:#EFEBD6;
  --card:#FFFFFF; /* カード背景 */
  --glass-border: rgba(0,0,0,0.06);
  --accent-a:#8C7A6B; /* 指定アクセント */
  --accent-b:#A3B18A; /* 指定アクセント */
  --muted-light:#6e6a5f;
  --muted-dark:#4b463c;
  --text-on-dark:#1f1b18; /* 基本文字色 */
  --text-on-card:#1f1b18; /* カード内文字色 */
  --radius:12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Noto Sans Mono", monospace;
  color-scheme: light;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: 'Segoe UI', 'Noto Sans JP', 'Meiryo', Arial, sans-serif;
  background: linear-gradient(180deg,var(--bg-1),var(--bg-2));
  color:var(--text-on-dark);
  -webkit-font-smoothing:antialiased;
}

.container{
  max-width:980px;
  margin:24px auto;
  padding:20px;
}

/* Header layout and version badge */
.header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
.header-title{flex:1}
.app-version{font-family:var(--mono);font-weight:700;font-size:0.95rem;padding:6px 10px;border-radius:999px;background:linear-gradient(90deg,var(--accent-b),var(--accent-a));color:#fff;box-shadow:0 6px 18px rgba(138,122,107,0.12)}

.header h1{margin:0 0 6px;font-size:1.6rem;letter-spacing:0.4px;color:var(--text-on-dark)}
.muted{color:var(--muted-light)}

.muted{color:var(--muted-dark);font-weight:500;}

/* 問題カードの質問テキスト（フォントサイズを大きくして読みやすくする） */
.card[aria-labelledby="inputTitle"] .muted {
  font-size: 20px;
  line-height: 1.4;
}

.grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:18px}
@media(min-width:900px){.grid{grid-template-columns:1fr 1.5fr}}

.card{
  background: var(--card);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow: 0 6px 18px rgba(70,60,50,0.06);
  color: var(--text-on-card);
}

/* space between the problem card and the x402 workflow card */
#progressCard{margin-top:5mm}

/* Card titles and answer text should be white for readability */
.card h2, .card h1 { color: var(--text-on-dark); }
.card .pre { color: var(--text-on-dark); }

/* Payment-proof and post-payment messages should be white */
.payment-proof { color: var(--text-on-dark); }

.row{display:flex;gap:10px;align-items:center;margin-top:12px}

.button{
  appearance:none;border:0;padding:10px 14px;border-radius:12px;cursor:pointer;font-weight:700;
  color:#fff;background:linear-gradient(90deg,var(--accent-a),var(--accent-b));
  box-shadow:0 6px 18px rgba(138,122,107,0.12);
  transition:transform .12s ease, box-shadow .12s ease, filter .12s ease;
}
.button:hover:not([disabled]){transform:translateY(-2px);filter:brightness(1.03)}
.button[disabled]{opacity:.6;cursor:not-allowed;transform:none}

.badge{display:inline-block;padding:6px 12px;border-radius:999px;background:rgba(0,0,0,0.04);border:1px solid rgba(0,0,0,0.06);font-family:var(--mono);font-size:.95rem;color:var(--text-on-dark)}

.pre{margin:10px 0 0;padding:14px;border-radius:12px;background:rgba(243,239,224,0.9);border:1px solid rgba(0,0,0,0.06);white-space:pre-wrap;min-height:5.5em;color:var(--text-on-card)}
.pre{
  margin:10px 0 0;
  padding:14px;
  border-radius:12px;
  background:rgba(243,239,224,0.9);
  border:1px solid rgba(0,0,0,0.06);
  white-space:pre-wrap;
  min-height:5.5em;
  color:var(--text-on-card);
  font-size:20px;
  line-height:1.6;
}
.error{margin:10px 0 0;color:#9b2b2b}

.footer{margin-top:18px;font-size:0.95rem;color:var(--muted);display:flex;justify-content:flex-end;gap:12px;align-items:center}

/* paid-details box shown inside the paid card */
.paid-details-box{margin-top:10px;display:flex;justify-content:flex-end;align-items:center;gap:12px}
.paid-details-box .paid-details-box-title{margin-right:8px;color:var(--muted-dark);font-weight:700}
.paid-details-box dl.kv{margin:0}

/* Service Worker status colors */
.sw-ready{color:#1e88e5 !important} /* blue */
.sw-unavailable{color:#d32f2f !important} /* red */

.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 10px;margin-top:10px}
.kv dt{color:var(--muted-dark)}
.kv dd{margin:0}

/* ensure kv text inside cards is dark */
.card .kv dd { color: var(--text-on-card); }

.payment-proof{margin-top:10px;padding:10px;border-radius:10px;background:rgba(243,239,224,0.95);border:1px solid rgba(0,0,0,0.06);color:var(--text-on-card)}

.payment-proof .proof-item {
  display: block;
  margin-top: 12px;
  padding: 6px 0;
}

.payment-proof .proof-item strong {
  display: block;
  color: var(--accent-a);
  font-weight: 800;
  font-size: 1.08em;
  margin-bottom: 6px;
}

.payment-proof .proof-value {
  display: block;
  font-family: var(--mono);
  background: rgba(255,255,255,0.98);
  color: var(--text-on-dark);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 1.02em;
  margin-left: 0;
  user-select: all;
  word-break: break-all;
  border: 1px solid rgba(0,0,0,0.06);
}

/* x402 progress bar */
.x402-progress{display:flex;gap:8px;align-items:center;margin-top:12px}
.x402-progress .step{flex:1;position:relative;padding:10px 8px;text-align:center;border-radius:10px;color:var(--muted-dark);background:transparent;border:1px solid rgba(0,0,0,0.04)}
.x402-progress .step::after{content:'';position:absolute;right:-12px;top:50%;transform:translateY(-50%);width:24px;height:4px;background:rgba(0,0,0,0.06)}
.x402-progress .step:last-child::after{display:none}
.x402-progress .step .label{display:block}

/* x402 explanation area */
.x402-explanation{margin-top:12px;padding:12px;border-radius:10px;background:linear-gradient(180deg,rgba(255,255,255,0.9),rgba(250,248,240,0.9));border:1px solid rgba(0,0,0,0.04);color:var(--muted-dark);font-size:0.98rem}

/* Ordered list styling for explanation */
.x402-explanation ol.x402-steps{margin:0;padding-left:1.1rem}
.x402-explanation ol.x402-steps li{margin:6px 0;line-height:1.45}
.x402-explanation .sub{margin-top:4px;margin-left:8px;color:var(--muted-dark);font-size:0.95rem}
.x402-explanation .sub::before{content:""}

/* animation highlight for sequential final-step effect */
.x402-progress .step.anim-highlight{background:linear-gradient(90deg,#FFB86C,#FF8A65);color:#fff;border-color:transparent;box-shadow:0 6px 18px rgba(255,138,101,0.12);font-weight:800}
.x402-progress .step.anim-highlight::after{background:#FF8A65}
.x402-progress .step.two-line{line-height:1.05;font-size:0.92rem}

/* paid state - very prominent green highlight */
.x402-progress .step.paid{background:linear-gradient(90deg,#43A047,#2E7D32);color:#fff;border-color:transparent;box-shadow:0 8px 24px rgba(67,160,71,0.18);font-weight:900}
.x402-progress .step.paid::after{background:linear-gradient(90deg,#66BB6A,#43A047)}
        .x402-progress .step.active{background:linear-gradient(90deg,#2E8B57,#2E8B57);color:#fff;border-color:transparent;font-weight:700}
        .x402-progress .step.completed{background:linear-gradient(90deg,#7FC29A,#7FC29A);color:#fff;border-color:transparent}
        .x402-progress .step.completed::after{background:#7FC29A}
        .x402-progress .step.active::after{background:#7FC29A}
        .x402-progress .step .label{display:block}

@media(max-width:700px){
  .x402-progress{flex-direction:column;gap:10px}
  .x402-progress .step::after{display:none}
}

@media(max-width:700px){
  .x402-progress{flex-direction:column;gap:10px}
  .x402-progress .step::after{display:none}
}


details summary{cursor:pointer;padding:8px 10px;border-radius:8px;background:linear-gradient(90deg,rgba(255,250,240,0.02),transparent);color:inherit}

/* paid-area の details（支払い情報）上部に余白を入れる */
.paid-details{margin-top:14px}

.empha{font-weight:700;color:#fff;background:linear-gradient(90deg,rgba(166,124,82,0.12),rgba(122,168,116,0.06));padding:4px 8px;border-radius:8px;display:inline-block;font-family:var(--mono)}


/* Wallet-style status */
.wallet-row{display:flex;gap:8px;align-items:center}
.wallet-dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(180deg,var(--accent-b),var(--accent-a));box-shadow:0 0 8px rgba(122,168,116,0.12)}

@media(max-width:600px){.container{padding:14px}.card{padding:14px}}

/* small utility */
.muted.small{font-size:.9rem;color:var(--muted)}
/* -------------------------
   Drawer — Modernized styles
   - glassy background, accent bar, circular close, subtle motion
-------------------------- */
:root{
  --drawer-width:380px;
  --drawer-bg: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(250,248,246,0.98));
  --drawer-shadow: rgba(6,10,20,0.22);
  --drawer-overlay: rgba(6,10,20,0.5);
  --drawer-accent: linear-gradient(180deg,var(--accent-a),var(--accent-b));
  --drawer-radius:18px;
}

.drawer{position:fixed;top:0;right:0;transform:translateX(100%);will-change:transform,opacity;width:var(--drawer-width);height:100%;background:var(--drawer-bg);backdrop-filter: blur(8px) saturate(120%);-webkit-backdrop-filter: blur(8px) saturate(120%);border-left:1px solid rgba(255,255,255,0.06);box-shadow:-28px 12px 60px var(--drawer-shadow);border-top-left-radius:var(--drawer-radius);border-bottom-left-radius:var(--drawer-radius);transition:transform 320ms cubic-bezier(.16,.84,.24,1), opacity 220ms ease;z-index:1200;display:flex;flex-direction:column;overflow:hidden}
.drawer.open{transform:translateX(0)}

.drawer-header{position:relative;display:flex;align-items:center;justify-content:space-between;padding:18px 16px;border-bottom:1px solid rgba(0,0,0,0.04);gap:12px}
.drawer-header::before{content:'';position:absolute;left:0;top:12px;height:calc(100% - 24px);width:6px;border-top-right-radius:8px;border-bottom-right-radius:8px;background:var(--drawer-accent)}
.drawer-header h3{margin:0;font-size:1.05rem;font-weight:800;color:var(--text-on-dark);padding-left:12px}

/* circular close button */
#close-drawer{appearance:none;border:0;background:linear-gradient(180deg,rgba(255,255,255,0.85),rgba(250,250,250,0.85));width:36px;height:36px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted-dark);box-shadow:0 6px 18px rgba(30,30,30,0.06);transition:transform .14s ease,box-shadow .14s ease}
#close-drawer:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(30,30,30,0.12)}
#close-drawer:focus{outline:3px solid rgba(140,122,107,0.16);outline-offset:3px}

.drawer-body{padding:18px 16px;overflow:auto;color:var(--text-on-dark);font-size:0.97rem;line-height:1.6}
.drawer-body h4{margin-top:0;margin-bottom:8px;font-size:0.98rem}
.drawer-body ul{margin:6px 0 12px 1.05rem}
.drawer-body ol{margin:6px 0 12px 1.05rem}

/* CTA inside drawer */
.drawer .cta{display:inline-block;margin-top:14px;padding:10px 14px;border-radius:12px;background:var(--drawer-accent);color:#fff;font-weight:800;border:0;cursor:pointer;box-shadow:0 8px 24px rgba(140,122,107,0.12)}
.drawer .cta:hover{transform:translateY(-3px)}

.drawer-overlay{position:fixed;inset:0;background:var(--drawer-overlay);opacity:0;transition:opacity 260ms ease;z-index:1100}
.drawer.open + .drawer-overlay{opacity:1}

/* compact trigger */
.button.secondary{background:transparent;color:var(--text-on-dark);border:1px solid rgba(0,0,0,0.06);box-shadow:none;padding:8px 12px}

@media(max-width:900px){:root{--drawer-width:100%}.drawer{transform:translateX(100%)}.drawer.open{transform:translateX(0)}.drawer{border-top-left-radius:10px;border-bottom-left-radius:0}}