:root{--bg:#0f1115;--panel:#171a21;--panel2:#12151b;--line:#232733;--txt:#e8eaf0;--muted:#9aa3b5;--acc:#4f7cff;--danger:#ff5c72;--ok:#22c55e;--shadow:0 6px 24px rgba(0,0,0,.25)}
:root[data-theme="light"]{--bg:#f6f7fb;--panel:#ffffff;--panel2:#eef1f7;--line:#dfe3ec;--txt:#141824;--muted:#5d6579;--acc:#2f5fe0;--danger:#d92f48;--ok:#16a34a;--shadow:0 6px 20px rgba(16,24,40,.08)}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--txt);font:16px/1.5 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex;flex-direction:column;transition:background .18s ease,color .18s ease}
.top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);background:var(--panel)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.logo{width:34px;height:34px;border-radius:10px;object-fit:cover;border:1px solid var(--line);background:var(--panel2);flex:none}
.name{font-weight:700;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.name .sub{font-weight:400;color:var(--muted);font-size:12px;margin-left:6px}
.actions{display:flex;align-items:center;gap:6px;flex:none}
.view{flex:1;display:flex;flex-direction:column;min-height:0}
.muted{color:var(--muted)}
.small{font-size:13px}
.center{text-align:center}
label{display:block;font-size:13px;color:var(--muted);margin:12px 0 6px;text-align:left}
input,textarea{width:100%;background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:12px;padding:13px;font-size:16px;outline:none}
input:focus,textarea:focus{border-color:var(--acc)}
button{cursor:pointer;font-size:16px;border-radius:12px;border:1px solid transparent;padding:13px 16px;margin-top:12px;font-family:inherit}
.primary{background:var(--acc);color:#fff;font-weight:600}
.primary:disabled{opacity:.55;cursor:default}
.wide{width:100%}
.ghost{background:transparent;border-color:var(--line);color:var(--txt);padding:8px 12px;font-size:14px;margin:0;text-decoration:none;display:inline-block}
.wide-btn{width:100%;padding:12px;margin-top:10px;font-size:15px}
.icon-btn{padding:8px 10px;font-size:15px}
.danger{background:transparent;border-color:var(--danger);color:var(--danger)}
.msg{min-height:22px;font-size:14px}
.msg.err{color:var(--danger)}
.tg-inline{color:var(--acc);text-decoration:none;font-size:14px;font-weight:600;display:block;margin:18px 0 0}
.welcome{padding:28px 22px calc(20px + env(safe-area-inset-bottom));align-items:center;justify-content:center;gap:0;overflow:auto}
.hero{text-align:center;margin-bottom:22px}
.logo-big{width:88px;height:88px;border-radius:22px;object-fit:cover;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--panel2)}
.hero h1{font-size:30px;letter-spacing:1px;margin:16px 0 0}
.hero .tag{font-size:14px;font-weight:600;color:var(--acc);letter-spacing:2px;text-transform:uppercase;margin:2px 0 0}
.hero .lead{font-size:15px;line-height:1.55;margin:12px auto 0;max-width:340px}
.card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.card label{margin-top:0}
.check{width:64px;height:64px;border-radius:50%;background:var(--ok);color:#fff;font-size:32px;line-height:64px;margin:0 auto;font-weight:700}
.sent-email{font-weight:700;font-size:17px;margin:6px 0;word-break:break-all}
.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px;-webkit-overflow-scrolling:touch}
.bubble{max-width:88%;padding:11px 14px;border-radius:16px;white-space:pre-wrap;word-wrap:break-word}
.me{align-self:flex-end;background:var(--acc);color:#fff;border-bottom-right-radius:6px}
.tee{align-self:flex-start;background:var(--panel);border:1px solid var(--line);border-bottom-left-radius:6px}
.sys{align-self:center;color:var(--muted);font-size:13px;max-width:92%;text-align:center}
.composer{display:flex;gap:8px;align-items:flex-end;padding:10px 12px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--panel)}
.composer textarea{resize:none;max-height:120px;margin:0}
.composer .send{width:auto;margin:0;padding:13px 18px}
.icon{background:transparent;border-color:var(--line);margin:0;padding:12px 13px;font-size:18px}
.sheet{position:fixed;inset:0;background:rgba(0,0,0,.55);display:flex;align-items:flex-end;z-index:10}
.sheet[hidden]{display:none!important}
.sheet-inner{background:var(--panel);border:1px solid var(--line);border-radius:18px 18px 0 0;padding:20px 18px calc(24px + env(safe-area-inset-bottom));width:100%;max-height:88vh;overflow:auto;box-shadow:var(--shadow)}
.sheet h2{margin:0 0 4px;font-size:19px}
.sheet hr{border:none;border-top:1px solid var(--line);margin:16px 0}