:root{
    --bg:#f7f4f1;
    --panel:#ffffff;
    --text:#171717;
    --muted:#737373;
    --line:#eee4dc;
    --accent:#111827;
    --accent2:#16a34a;
    --danger:#b91c1c;
    --warn:#fff7ed;
    --shadow:0 20px 70px rgba(17,24,39,.08);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit}
button,input,textarea{font:inherit}
.km-auth-body{min-height:100vh;display:grid;place-items:center;padding:22px;background:radial-gradient(circle at top left,#fff 0,#f7f4f1 45%,#eee5dd 100%)}
.km-auth-card{width:min(860px,100%);background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:34px;padding:34px;box-shadow:var(--shadow)}
.km-brand{display:inline-flex;padding:9px 14px;border-radius:999px;background:#111827;color:#fff;font-weight:800;margin-bottom:14px}
.km-auth-card h1{font-size:34px;line-height:1.1;margin:0 0 20px}.km-auth-card h2{margin:0 0 12px;font-size:20px}
.km-warning{background:var(--warn);border:1px solid #fed7aa;border-radius:24px;padding:20px;margin:18px 0;line-height:1.55}.km-warning p{margin:0 0 12px}.km-warning p:last-child{margin-bottom:0}
.km-checkbox{display:flex;gap:12px;align-items:flex-start;margin:18px 0;color:#222;line-height:1.45}.km-checkbox input{margin-top:4px;transform:scale(1.2)}
.km-primary{border:0;background:linear-gradient(135deg,#111827,#334155);color:#fff;border-radius:18px;padding:14px 20px;font-weight:800;cursor:pointer;box-shadow:0 12px 30px rgba(17,24,39,.15)}
.km-primary:disabled{opacity:.55;cursor:not-allowed}.km-light-btn{border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 14px;cursor:pointer}
.km-status,.km-small-status{margin-top:14px;color:var(--muted);line-height:1.45}.km-status-error,.km-small-status-error{color:var(--danger)}.km-small-status{font-size:13px;min-height:18px}
.km-auth-footer{margin-top:22px;color:var(--muted);font-size:14px}.km-shell{display:grid;grid-template-columns:360px minmax(0,1fr);height:100vh;overflow:hidden}
.km-sidebar{background:#fff;border-right:1px solid var(--line);padding:18px;overflow:auto}.km-profile{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;padding:18px;border:1px solid var(--line);border-radius:22px;background:#fafafa;margin-bottom:16px}.km-profile strong{display:block}.km-profile span{display:block;color:var(--muted);font-size:13px;margin-top:4px}.km-profile a{font-size:13px;color:var(--danger);text-decoration:none}
.km-search-card{border:1px solid var(--line);border-radius:22px;padding:16px;background:#fff;box-shadow:0 10px 30px rgba(0,0,0,.03)}.km-search-card label{display:block;font-weight:800;margin-bottom:10px}.km-iin-row{display:flex;gap:8px}.km-iin-row input{min-width:0;flex:1;border:1px solid var(--line);border-radius:14px;padding:12px}.km-iin-row button{border:0;background:#111827;color:white;border-radius:14px;padding:0 14px;font-weight:800;cursor:pointer}
.km-conv-title{font-size:13px;text-transform:uppercase;color:var(--muted);letter-spacing:.08em;margin:22px 4px 10px}.km-conversation-list{display:grid;gap:8px}.km-conversation{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:18px;padding:14px;cursor:pointer}.km-conversation:hover{border-color:#cbd5e1;background:#f8fafc}.km-conversation strong,.km-conversation span,.km-conversation small{display:block}.km-conversation span,.km-conversation small{color:var(--muted);font-size:13px;margin-top:3px}.km-muted{color:var(--muted);padding:14px}
.km-chat{display:flex;flex-direction:column;min-width:0;height:100vh}.km-chat-header{height:78px;flex:0 0 auto;background:rgba(255,255,255,.86);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 22px}.km-chat-header strong{display:block;font-size:18px}.km-chat-header span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.km-messages{flex:1;overflow:auto;padding:20px;display:flex;flex-direction:column;gap:12px}.km-empty{margin:auto;color:var(--muted);text-align:center;border:1px dashed var(--line);padding:30px;border-radius:24px;background:rgba(255,255,255,.5)}.km-message{max-width:min(740px,82%);border:1px solid var(--line);border-radius:22px;padding:12px 14px;background:#fff;box-shadow:0 10px 25px rgba(0,0,0,.04);white-space:pre-wrap;word-break:break-word}.km-message-out{align-self:flex-end;background:#111827;color:#fff;border-color:#111827}.km-message-in{align-self:flex-start}.km-message-meta{font-size:11px;opacity:.68;margin-bottom:7px}.km-message-body{line-height:1.45}.km-file-link{display:inline-flex;margin-top:10px;padding:9px 12px;border-radius:12px;background:rgba(22,163,74,.12);color:inherit;text-decoration:none;font-weight:800}
.km-send-form{flex:0 0 auto;border-top:1px solid var(--line);background:#fff;padding:14px 18px}.km-send-form textarea{width:100%;resize:vertical;border:1px solid var(--line);border-radius:18px;padding:14px;min-height:54px;max-height:160px}.km-send-actions{display:flex;align-items:center;gap:12px;justify-content:space-between;margin-top:10px}.km-send-actions input{min-width:0;flex:1;border:1px solid var(--line);border-radius:14px;padding:10px;background:#fafafa}
.km-security-footer{background:#fff;border-top:1px solid var(--line);padding:18px 22px;color:#525252;font-size:13px;line-height:1.5}.km-security-footer h3{margin:0 0 8px;color:#111;font-size:16px}.km-security-footer p{margin:0 0 8px}.km-page{max-width:1100px;margin:0 auto;padding:30px}.km-back{display:inline-flex;margin-bottom:16px;text-decoration:none;color:#111827;font-weight:800}.km-table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:22px}.km-table{width:100%;border-collapse:collapse}.km-table th,.km-table td{border-bottom:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}.km-table code{font-size:12px;white-space:pre-wrap}
@media (max-width:900px){.km-shell{grid-template-columns:1fr;height:auto;min-height:100vh}.km-sidebar{border-right:0;border-bottom:1px solid var(--line);max-height:44vh}.km-chat{height:56vh;min-height:560px}.km-message{max-width:94%}.km-send-actions{flex-direction:column;align-items:stretch}.km-auth-card{padding:22px;border-radius:24px}.km-auth-card h1{font-size:28px}}
.km-header-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.km-security-card{border:1px solid var(--line);border-radius:22px;padding:15px;background:#f8fafc;margin-top:14px;display:grid;gap:10px}.km-security-card strong{display:block}.km-security-card span{display:block;color:var(--muted);font-size:13px;line-height:1.45}.km-modal{position:fixed;inset:0;background:rgba(15,23,42,.45);backdrop-filter:blur(10px);display:grid;place-items:center;padding:18px;z-index:100}.km-modal[hidden]{display:none}.km-modal-card{width:min(520px,100%);background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:22px;position:relative}.km-modal-card h2{margin:0 0 8px}.km-modal-close{position:absolute;right:14px;top:12px;border:0;background:#f3f4f6;border-radius:999px;width:36px;height:36px;font-size:24px;cursor:pointer}.km-muted-text{color:var(--muted);line-height:1.45}.km-safety-canvas{display:block;margin:14px auto;border:1px solid var(--line);border-radius:18px;background:#fff}.km-safety-code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:18px;font-weight:900;line-height:1.7;letter-spacing:.04em;background:#111827;color:#fff;border-radius:18px;padding:14px;text-align:center;word-break:break-word}.km-safety-payload{width:100%;height:90px;border:1px solid var(--line);border-radius:16px;padding:10px;margin:12px 0;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:12px}.km-ratchet-meta{font-size:11px;opacity:.72;margin-top:6px}.km-message-warning{border-color:#f59e0b;background:#fffbeb;color:#78350f}.km-message-out.km-message-warning{background:#78350f;color:#fff;border-color:#78350f}
@media (max-width:900px){.km-header-actions{width:100%;margin-top:8px}.km-chat-header{height:auto;align-items:flex-start;gap:10px;flex-direction:column}.km-security-card{margin-bottom:12px}}

/* v3: public index.php + clean chat.php */
.km-brand-link{text-decoration:none}.km-profile-links{display:flex;flex-direction:column;gap:7px;align-items:flex-end}.km-profile-links a{font-size:13px;text-decoration:none}.km-profile-links a:first-child{color:#475569}.km-profile-links a:last-child{color:var(--danger)}
.km-message-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.km-ratchet-meta{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:10px;line-height:1.35;opacity:.42;color:#64748b;margin-top:7px;letter-spacing:.01em}.km-message-out .km-ratchet-meta{color:#cbd5e1;opacity:.42}.km-message:hover .km-ratchet-meta{opacity:.72}.km-file-link{border:1px solid rgba(22,163,74,.18)}.km-message-out .km-file-link{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.18)}
.km-send-actions input[type="file"]::file-selector-button{border:0;background:#111827;color:#fff;border-radius:10px;padding:8px 10px;margin-right:10px;font-weight:800;cursor:pointer}.km-send-actions input[type="file"]:disabled::file-selector-button{opacity:.5;cursor:not-allowed}.km-light-btn:disabled{opacity:.48;cursor:not-allowed}.km-conversation.active,.km-conversation[aria-current="true"]{border-color:#111827;background:#f8fafc;box-shadow:inset 0 0 0 1px #111827}.km-header-actions .km-light-btn{white-space:nowrap}.km-safety-payload:focus,.km-send-form textarea:focus,.km-iin-row input:focus{outline:2px solid rgba(17,24,39,.15);border-color:#111827}.km-small-status:empty{display:none}.km-status:empty{display:none}.km-modal-card .km-light-btn{width:100%;font-weight:800}.km-message-warning .km-ratchet-meta{opacity:.58}

/* public information page */
.km-info-body{min-height:100vh;background:radial-gradient(circle at 10% 0%,#fff 0,#f7f4f1 38%,#efe6dd 100%);color:var(--text)}.km-info-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 30px;background:rgba(255,255,255,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.km-info-logo{font-weight:900;text-decoration:none;color:#111827;letter-spacing:-.02em}.km-info-nav nav{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.km-info-nav nav a{font-size:14px;text-decoration:none;color:#475569;font-weight:700}.km-info-nav-btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;background:#111827;color:#fff;border-radius:999px;padding:10px 14px;font-weight:900;white-space:nowrap}.km-info-main{max-width:1180px;margin:0 auto;padding:34px 22px 70px}.km-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,560px);gap:28px;align-items:center;padding:30px 0 42px}.km-kicker{display:inline-flex;align-items:center;gap:8px;width:max-content;max-width:100%;background:#111827;color:#fff;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.km-hero h1{font-size:clamp(40px,7vw,76px);line-height:.95;letter-spacing:-.06em;margin:18px 0}.km-hero p,.km-section-title p,.km-info-card p,.km-info-panel p,.km-legal-note{font-size:16px;line-height:1.68;color:#475569}.km-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.km-link-btn{text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.km-hero-visual{background:rgba(255,255,255,.62);border:1px solid var(--line);border-radius:36px;padding:16px;box-shadow:var(--shadow)}.km-hero-visual svg{width:100%;height:auto;display:block}.km-info-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:10px 0 34px}.km-info-card,.km-info-panel,.km-diagram-card,.km-legal-box{background:rgba(255,255,255,.84);border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 12px 45px rgba(17,24,39,.06)}.km-info-card h2,.km-info-panel h2,.km-info-section h2{margin:12px 0 10px;letter-spacing:-.035em;color:#111827}.km-info-icon{width:44px;height:44px;border-radius:16px;background:#111827;color:#fff;display:grid;place-items:center;font-weight:900}.km-info-section{margin-top:46px}.km-section-title{max-width:780px;margin-bottom:18px}.km-section-title h2{font-size:clamp(30px,4vw,48px);line-height:1;margin:16px 0 8px}.km-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:10px;align-items:stretch;margin:20px 0}.km-flow-step{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;min-height:120px}.km-flow-step strong{display:block;font-size:18px;margin-bottom:8px;color:#111827}.km-flow-step span{display:block;line-height:1.5;color:#64748b}.km-flow-arrow{display:grid;place-items:center;color:#94a3b8;font-size:28px;font-weight:900}.km-diagram-card{padding:10px}.km-diagram-card svg{width:100%;height:auto;display:block}.km-two-col{display:grid;grid-template-columns:minmax(0,1.2fr) 330px;gap:18px;align-items:stretch}.km-fingerprint-sample{display:grid;gap:6px;margin:18px 0;padding:14px;border-radius:18px;background:#f8fafc;border:1px solid #e2e8f0}.km-fingerprint-sample span{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color:#64748b;font-size:12px}.km-note{font-size:14px!important}.km-qr-demo{background:#111827;border-radius:28px;padding:24px;display:grid;place-items:center;color:#fff;box-shadow:var(--shadow)}.km-qr-grid{display:grid;grid-template-columns:repeat(8,18px);grid-template-rows:repeat(8,18px);gap:4px;background:#fff;padding:14px;border-radius:18px;margin-bottom:16px}.km-qr-grid span{width:18px;height:18px;background:#e5e7eb;border-radius:4px}.km-qr-grid span.on{background:#111827}.km-qr-demo strong{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:17px;margin-bottom:8px}.km-qr-demo small{color:#cbd5e1}.km-info-warning{margin:0}.km-legal-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.km-legal-grid h3{margin:0 0 8px}.km-legal-grid ul{margin:0;padding-left:20px;color:#475569;line-height:1.75}.km-legal-note{margin:20px 0 0;padding:18px;border-radius:20px;background:#f8fafc;border:1px solid #e2e8f0}.km-info-footer{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 30px;background:#111827;color:#cbd5e1}.km-info-footer a{color:#fff;font-weight:900;text-decoration:none}.km-info-footer span{font-size:13px}
@media (max-width:960px){.km-info-nav{align-items:flex-start;flex-direction:column}.km-info-nav nav{display:none}.km-hero{grid-template-columns:1fr}.km-info-grid{grid-template-columns:1fr}.km-flow{grid-template-columns:1fr}.km-flow-arrow{transform:rotate(90deg)}.km-two-col{grid-template-columns:1fr}.km-legal-grid{grid-template-columns:1fr}.km-info-footer{align-items:flex-start;flex-direction:column}.km-hero h1{font-size:42px}.km-info-main{padding-top:18px}}
@media (max-width:640px){.km-info-nav{padding:14px 18px}.km-info-main{padding-left:16px;padding-right:16px}.km-hero-visual{padding:8px;border-radius:24px}.km-info-card,.km-info-panel,.km-legal-box{padding:18px;border-radius:22px}.km-kicker{font-size:10px}.km-qr-demo{padding:18px}.km-qr-grid{grid-template-columns:repeat(8,14px);grid-template-rows:repeat(8,14px)}.km-qr-grid span{width:14px;height:14px}.km-profile{align-items:flex-start}.km-profile-links{align-items:flex-start}}


.km-law-section{scroll-margin-top:90px}.km-law-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.km-law-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:0 10px 34px rgba(17,24,39,.05)}.km-law-card strong{display:block;color:#111827;font-size:17px;margin-bottom:6px}.km-law-card span{display:block;color:#334155;font-weight:800;margin-bottom:10px}.km-law-card p{margin:0;color:#64748b;line-height:1.58;font-size:14px}.km-law-card.danger{border-color:#fecaca;background:#fff7f7}.km-law-card.danger strong{color:#991b1b}.km-law-warning{margin-top:16px}.km-law-footnote{font-size:13px;color:#64748b}.km-final-cta{display:flex;justify-content:space-between;gap:20px;align-items:center;background:#111827;color:#fff;border-radius:34px;padding:28px;box-shadow:var(--shadow)}.km-final-cta h2{color:#fff;margin:12px 0 8px;font-size:clamp(28px,4vw,44px);line-height:1}.km-final-cta p{margin:0;color:#cbd5e1;line-height:1.6;max-width:720px}.km-final-cta .km-kicker{background:#fff;color:#111827}.km-final-cta .km-primary{background:#fff;color:#111827;box-shadow:none;white-space:nowrap}
@media (max-width:960px){.km-law-grid{grid-template-columns:1fr}.km-final-cta{align-items:flex-start;flex-direction:column}.km-final-cta .km-primary{width:100%}}

.km-delete-policy-row{display:flex;align-items:center;gap:10px;margin-top:10px;color:#64748b;font-size:13px}.km-delete-policy-row label{font-weight:800;white-space:nowrap}.km-delete-policy-row select{width:100%;border:1px solid var(--line);border-radius:14px;padding:10px 12px;background:#fff;color:#111827;font-weight:700}