:root {
  --navy:#1B2A4A; --navy-light:#2D4A7A; --blue:#2563EB; --blue-light:#EFF6FF; --blue-mid:#DBEAFE;
  --orange:#EA580C; --orange-bg:#FFF7ED; --green:#059669; --green-bg:#ECFDF5;
  --red:#DC2626; --red-bg:#FEF2F2; --amber:#D97706; --amber-bg:#FFFBEB;
  --g50:#F9FAFB; --g100:#F3F4F6; --g200:#E5E7EB; --g300:#D1D5DB; --g500:#6B7280; --g700:#374151; --g900:#111827;
  --white:#FFF; --shadow:0 1px 3px rgba(0,0,0,.1); --shadow-md:0 4px 6px rgba(0,0,0,.07);
  --shadow-lg:0 10px 15px rgba(0,0,0,.1); --r:8px; --rl:12px;
  --font:'Noto Sans JP',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --max-w:800px; --tr:.2s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--g50);color:var(--g900);line-height:1.7;min-height:100dvh;-webkit-font-smoothing:antialiased}

/* ── Header ── */
.header{background:linear-gradient(135deg,var(--navy),var(--navy-light));color:var(--white);position:sticky;top:0;z-index:100;box-shadow:var(--shadow-md)}
.header-inner{max-width:var(--max-w);margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:10px;flex-wrap:nowrap}
.logo{font-size:1rem;font-weight:700;display:flex;align-items:center;gap:6px;white-space:nowrap;min-width:0}
.logo-icon{font-size:1.2rem}
.badge{background:var(--orange);font-size:.55rem;font-weight:700;padding:2px 7px;border-radius:20px}

/* Back Button */
.back-btn{display:inline-flex;align-items:center;gap:5px;color:var(--white);text-decoration:none;font-size:.75rem;font-weight:600;
  background:rgba(255,255,255,.12);padding:6px 12px 6px 8px;border-radius:20px;border:1px solid rgba(255,255,255,.2);
  white-space:nowrap;flex-shrink:0;transition:all var(--tr)}
.back-btn svg{width:14px;height:14px;flex-shrink:0;transition:transform var(--tr)}
.back-btn:hover{background:rgba(255,255,255,.22);border-color:rgba(255,255,255,.4)}
.back-btn:hover svg{transform:translateX(-2px)}
.back-btn:active{transform:scale(.95)}

/* Usage Badge */
.usage-badge{display:inline-flex;align-items:center;gap:5px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);
  border-radius:20px;padding:3px 10px;font-size:.65rem;color:rgba(255,255,255,.7);margin-left:auto;white-space:nowrap;flex-shrink:0}
.usage-badge .pulse{width:6px;height:6px;background:#34D399;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ── Container ── */
.container{max-width:var(--max-w);margin:0 auto;padding:20px 16px}

/* ── Hero ── */
.hero{text-align:center;padding:28px 16px 20px}
.hero h1{font-size:1.4rem;font-weight:800;color:var(--navy);margin-bottom:6px}
.hero p{font-size:.88rem;color:var(--g500)}

.hero-sub{font-size:.75rem;color:var(--blue);font-weight:600;letter-spacing:.5px;text-transform:uppercase;margin-bottom:6px}
.hero-desc{font-size:.84rem}
.disclaimer{text-align:center;padding:20px 16px;font-size:.76rem;color:var(--g500);line-height:1.6}

/* ── Usage Stats (Top) ── */
.usage-stats{display:flex;justify-content:center;gap:32px;padding:12px 0 20px}
.usage-stat{text-align:center}
.usage-stat .num{display:block;font-size:1.5rem;font-weight:800;color:var(--blue);line-height:1.2}
.usage-stat .lbl{display:block;font-size:.72rem;color:var(--g500);margin-top:2px}

/* ── Cards ── */
.card-grid{display:grid;grid-template-columns:1fr;gap:8px}
@media(min-width:600px){.card-grid{grid-template-columns:repeat(2,1fr)}}
.card{background:var(--white);border-radius:var(--r);padding:14px 16px;text-decoration:none;color:inherit;
  box-shadow:var(--shadow);border:1px solid var(--g200);transition:all var(--tr);
  display:flex;align-items:center;gap:12px}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--blue)}
.card-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0;background:var(--g50)}
.card-body{flex:1;min-width:0}
.card-title{font-size:.88rem;font-weight:700;color:var(--navy)}
.card-desc{font-size:.72rem;color:var(--g500);line-height:1.4;margin-top:2px}
.card .arrow{flex-shrink:0;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--blue);color:var(--white);transition:all var(--tr)}
.card:hover .arrow{background:#1D4ED8;transform:translateX(2px)}

/* Layer sections */
.layer-section{margin-bottom:20px}
.layer-header{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--r);margin-bottom:8px}
.layer-1{background:linear-gradient(135deg,#EFF6FF,#DBEAFE)} .layer-2{background:linear-gradient(135deg,#FEF3C7,#FDE68A)} .layer-3{background:linear-gradient(135deg,#ECFDF5,#A7F3D0)}
.layer-num{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.8rem;flex-shrink:0}
.layer-1 .layer-num{background:var(--blue);color:var(--white)} .layer-2 .layer-num{background:#D97706;color:var(--white)} .layer-3 .layer-num{background:#059669;color:var(--white)}
.layer-title{font-weight:700;font-size:.88rem;display:block} .layer-desc{font-size:.72rem;color:var(--g500);display:block;margin-top:1px}

/* Chips for multi-select */
.chip-group{display:flex;flex-wrap:wrap;gap:6px}
.chip{padding:6px 12px;border:1.5px solid var(--g200);border-radius:20px;font-size:.78rem;cursor:pointer;transition:all var(--tr);color:var(--g600);background:var(--white);user-select:none}
.chip:hover{border-color:var(--blue);color:var(--blue)}
.chip.active{background:var(--blue);color:var(--white);border-color:var(--blue)}

/* ── Notice ── */
.notice{background:var(--amber-bg);border:1px solid var(--amber);border-radius:var(--r);padding:14px;font-size:.78rem;color:var(--g700);line-height:1.7;margin-bottom:12px}
.notice strong{color:var(--amber)}
.notice-safety{background:var(--red-bg);border-color:var(--red)}
.notice-safety strong{color:var(--red)}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;
  font-size:.88rem;font-weight:600;font-family:var(--font);border:none;border-radius:var(--r);
  cursor:pointer;transition:all var(--tr);text-decoration:none;white-space:nowrap}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn-primary{background:var(--blue);color:var(--white);box-shadow:var(--shadow)}
.btn-primary:hover:not(:disabled){background:#1D4ED8;box-shadow:var(--shadow-md)}
.btn-secondary{background:var(--white);color:var(--g700);border:1px solid var(--g300)}
.btn-secondary:hover:not(:disabled){background:var(--g50);border-color:var(--g500)}
.btn-full{width:100%}
.btn-sm{padding:7px 14px;font-size:.8rem}
.btn-group{display:flex;gap:6px;flex-wrap:wrap}
.btn.copied{background:var(--green);color:var(--white)}
.btn-demo{background:linear-gradient(135deg,#F59E0B,var(--orange));color:var(--white);box-shadow:var(--shadow)}
.btn-demo:hover:not(:disabled){filter:brightness(1.05)}
.btn-print{background:var(--navy);color:var(--white)}
.btn-print:hover:not(:disabled){background:var(--navy-light)}

/* ── Forms ── */
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:.84rem;font-weight:600;color:var(--g700);margin-bottom:5px}
.req{color:var(--red);font-size:.72rem;margin-left:3px}
input[type="text"],input[type="date"],input[type="number"],select,textarea{
  width:100%;padding:9px 12px;font-size:.88rem;font-family:var(--font);border:1px solid var(--g300);
  border-radius:var(--r);background:var(--white);color:var(--g900);transition:border-color var(--tr),box-shadow var(--tr);-webkit-appearance:none}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
textarea{min-height:80px;resize:vertical}
input::placeholder,textarea::placeholder{color:var(--g300)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:480px){.form-row{grid-template-columns:1fr}}
.form-hint{font-size:.72rem;color:var(--g500);margin-top:3px}

/* Workers */
.worker-row{display:flex;gap:6px;margin-bottom:6px;align-items:center}
.worker-row input[type="text"]{flex:2} .worker-row input[type="number"]{flex:1;max-width:72px}
.worker-row .remove-btn{background:none;border:none;color:var(--red);font-size:1.1rem;cursor:pointer;padding:4px;flex-shrink:0}
.add-worker-btn{background:none;border:1px dashed var(--g300);border-radius:var(--r);padding:7px;width:100%;
  color:var(--blue);font-size:.82rem;font-weight:600;cursor:pointer;font-family:var(--font);transition:all var(--tr)}
.add-worker-btn:hover{border-color:var(--blue);background:var(--blue-light)}

/* Chips */

/* ── Output ── */
.output-area{background:var(--white);border:1px solid var(--g200);border-radius:var(--rl);padding:20px;margin-top:18px;
  box-shadow:var(--shadow);min-height:180px;display:none}
.output-area.visible{display:block}
.output-content{font-size:.88rem;line-height:1.8;color:var(--g700)}
.output-content .md-h2{font-size:1.1rem;font-weight:700;color:var(--navy);margin:24px 0 4px;padding-bottom:4px;border-bottom:2px solid var(--blue-light)}
.output-content .md-h3{font-size:.96rem;font-weight:700;color:var(--navy-light);margin:20px 0 3px}
.output-content .md-h4{font-size:.9rem;font-weight:700;color:var(--g700);margin:16px 0 2px}
.output-content ul{padding-left:18px;margin:6px 0;list-style-type:disc} .output-content li{margin-bottom:4px;line-height:1.6}
.output-content p{margin:4px 0}
.output-content strong{color:var(--navy)} .output-content .md-hr{border:none;border-top:1px solid var(--g200);margin:14px 0}
.output-content pre{background:var(--g100);padding:10px;border-radius:var(--r);overflow-x:auto;font-size:.8rem;margin:6px 0}
.output-content table{width:100%;border-collapse:collapse;margin:6px 0}
.output-content td{padding:5px 8px;border:1px solid var(--g200);font-size:.82rem}

/* Checkbox */
.md-check{display:flex;align-items:flex-start;gap:8px;padding:6px 10px;margin:3px 0;border-radius:var(--r);cursor:pointer;transition:background var(--tr)}
.md-check:hover{background:var(--g50)}
.md-check input[type="checkbox"]{width:18px;height:18px;margin-top:2px;accent-color:var(--blue);flex-shrink:0}
.md-check.checked span{text-decoration:line-through;color:var(--g500)}

/* ── Chat ── */
.chat-container{display:flex;flex-direction:column;flex:1;min-height:0;overflow:hidden}
.chat-messages{flex:1;overflow-y:auto;overflow-x:hidden;padding:14px 0;display:flex;flex-direction:column;gap:14px}
.chat-input-area{display:flex;gap:8px;padding:10px 0;border-top:1px solid var(--g200)}
.chat-input-area input{flex:1} .chat-input-area .btn{flex-shrink:0}
.msg{display:flex;gap:8px;max-width:88%;animation:msgIn .3s ease}
@media(min-width:600px){.msg{max-width:70%}}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.msg.user{align-self:flex-end;flex-direction:row-reverse} .msg.assistant{align-self:flex-start}
.msg-avatar{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;flex-shrink:0}
.msg.user .msg-avatar{background:var(--blue);color:var(--white)} .msg.assistant .msg-avatar{background:var(--navy);color:var(--white)}
.msg-body{padding:10px 14px;border-radius:var(--rl);font-size:.86rem;line-height:1.7;overflow-wrap:break-word;word-break:break-word;min-width:0;overflow:hidden}
.msg.user .msg-body{background:var(--blue);color:var(--white);border-bottom-right-radius:4px}
.msg.assistant .msg-body{background:var(--white);border:1px solid var(--g200);color:var(--g700);border-bottom-left-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.msg.assistant .msg-body .md-h4{font-size:.86rem;margin:16px 0 2px;color:var(--navy)}
.msg.assistant .msg-body .md-h3{font-size:.92rem;margin:18px 0 2px;color:var(--navy)}
.msg.assistant .msg-body strong{color:var(--navy)}
.msg.assistant .msg-body ul{padding-left:18px;margin:6px 0;list-style-type:disc}
.msg.assistant .msg-body li{margin-bottom:6px;line-height:1.6}
.msg.assistant .msg-body p{margin:4px 0}

.chat-suggestions{display:flex;flex-wrap:wrap;gap:5px;padding:6px 0}
.chat-suggestions button{background:var(--white);border:1px solid var(--g200);border-radius:20px;padding:5px 12px;
  font-size:.76rem;color:var(--blue);cursor:pointer;font-family:var(--font);transition:all var(--tr)}
.chat-suggestions button:hover{background:var(--blue-light);border-color:var(--blue)}

/* ── Loader ── */
.loader{display:flex;flex-direction:column;align-items:center;gap:10px;padding:20px;color:var(--g500);font-size:.84rem}
.loader-dots{display:flex;gap:5px}
.loader-dots span{width:7px;height:7px;background:var(--blue);border-radius:50%;animation:bounce 1.4s ease-in-out infinite}
.loader-dots span:nth-child(2){animation-delay:.2s} .loader-dots span:nth-child(3){animation-delay:.4s}
@keyframes bounce{0%,80%,100%{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}

/* ── Inline Validation ── */
.field-error{border-color:var(--red)!important;box-shadow:0 0 0 3px rgba(220,38,38,.15)!important}
.field-error-msg{color:var(--red);font-size:.76rem;margin-top:3px;animation:fadeSlide .2s ease}
@keyframes fadeSlide{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}

/* PII Warning */
.notice-inline{padding:9px 12px;border-radius:var(--r);font-size:.8rem;line-height:1.5;margin-bottom:10px;animation:fadeSlide .3s ease}
.notice-inline.pii{background:#FEF3C7;border:1px solid #F59E0B;color:#92400E}

/* Section Card */
.section-card{background:var(--white);border-radius:var(--rl);padding:20px;box-shadow:var(--shadow);border:1px solid var(--g200)}
.section-card h2{font-size:1.05rem;font-weight:700;color:var(--navy);margin-bottom:14px;display:flex;align-items:center;gap:7px}

/* ── PWA Banner ── */
.pwa-banner{background:linear-gradient(135deg,var(--blue),#4F46E5);color:var(--white);padding:10px 16px;display:flex;align-items:center;gap:10px;font-size:.8rem;cursor:pointer}
.pwa-banner .pwa-close{margin-left:auto;background:none;border:none;color:rgba(255,255,255,.7);font-size:1.1rem;cursor:pointer}
.pwa-banner.hidden{display:none}

/* Footer */
.footer{text-align:center;padding:18px;color:var(--g500);font-size:.72rem;border-top:1px solid var(--g200);margin-top:20px}
.footer a{color:var(--blue);text-decoration:none} .footer a:hover{text-decoration:underline}

/* Error */
.error-msg{background:var(--red-bg);border:1px solid var(--red);color:var(--red);padding:10px 14px;border-radius:var(--r);font-size:.84rem;margin-top:10px}

/* Scrollbar */
::-webkit-scrollbar{width:5px} ::-webkit-scrollbar-track{background:transparent} ::-webkit-scrollbar-thumb{background:var(--g300);border-radius:3px}

/* Follow-up questions */
.followups{display:flex;flex-direction:column;gap:5px;margin-top:8px;padding-top:8px;border-top:1px solid var(--g200)}
.followup-btn{display:flex;align-items:center;gap:6px;background:var(--g50);border:1px solid var(--g200);border-radius:var(--r);
  padding:7px 12px;font-size:.78rem;color:var(--blue);cursor:pointer;font-family:var(--font);transition:all var(--tr);text-align:left;line-height:1.4}
.followup-btn:hover{background:var(--blue-light);border-color:var(--blue)}
.followup-btn svg{flex-shrink:0;opacity:.5}

/* Typing cursor */
.typing-cursor{display:inline-block;width:2px;height:1em;background:var(--blue);margin-left:1px;vertical-align:text-bottom;animation:blink .6s step-end infinite}
@keyframes blink{50%{opacity:0}}

/* ── Responsive ── */
@media(max-width:480px){
  .container{padding:12px}
  .header-inner{padding:8px 12px;gap:6px}
  .logo{font-size:.88rem}
  .back-btn{font-size:.7rem;padding:5px 10px 5px 7px}
  .back-btn svg{width:12px;height:12px}
  .usage-badge{font-size:.6rem;padding:2px 8px}
  .hero h1{font-size:1.2rem}
  .section-card{padding:14px}
  .output-area{padding:14px}
  .btn-group{gap:4px}
  .btn-sm{padding:6px 10px;font-size:.74rem}
}