:root{
  --ground:#0E0D0F; --ground-2:#141317; --panel:#1A181D; --panel-2:#221F26;
  --line:#2C2831; --line-2:#3A3540;
  --ink:#EDE9E6; --ink-soft:#A8A09A; --ink-faint:#6E6862;
  --ember:#FF6B35; --ember-2:#FF3D3D; --ash-blue:#4EA8DE;
  --good:#3FBF7F; --danger:#FF4D4D;
  --sans:'Sora', ui-sans-serif, system-ui, sans-serif;
  --mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;
  --shadow:0 2px 6px rgba(0,0,0,.4), 0 24px 60px -24px rgba(0,0,0,.85);
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);background:var(--ground);color:var(--ink);line-height:1.45;
  -webkit-font-smoothing:antialiased;min-height:100dvh;display:flex;justify-content:center;
}
.mono{font-family:var(--mono)}

.stage{
  width:100%;max-width:460px;position:relative;display:flex;flex-direction:column;
  min-height:100dvh;background:
    radial-gradient(120% 60% at 50% -10%, color-mix(in srgb, var(--ember) 9%, transparent), transparent 60%),
    var(--ground);
  overflow:hidden;
}
@media (min-width:520px){
  body{align-items:center;padding:28px 16px;
    background:radial-gradient(1000px 600px at 50% -10%, #17141a, #0b0a0c);}
  .stage{min-height:auto;height:min(880px,calc(100dvh - 56px));border-radius:34px;border:1px solid var(--line);
    box-shadow:var(--shadow);outline:9px solid #050506;outline-offset:-1px;}
}

/* ---------- ember-to-ash logo ---------- */
.ember-mark{width:30px;height:30px;flex:none;background:url("/icons/mark.svg") center/contain no-repeat;filter:drop-shadow(0 0 7px rgba(255,80,40,.5))}
.ember-mark .core{display:none}
.ember-mark.sm{width:24px;height:24px}
.ember-mark.lg{width:66px;height:66px;filter:drop-shadow(0 0 16px rgba(255,80,40,.55))}

/* ---------- screens ---------- */
.screen{position:absolute;inset:0;display:flex;flex-direction:column;transition:opacity .45s ease}
.screen[hidden]{display:none}
.screen.leaving{opacity:0;pointer-events:none}
.boot{align-items:center;justify-content:center}
.pad{justify-content:space-between;padding:clamp(26px,7vw,42px) 26px calc(28px + env(safe-area-inset-bottom))}

.brand{display:flex;align-items:center;gap:10px;padding-top:calc(8px + env(safe-area-inset-top))}
.brand b{font-family:var(--mono);font-weight:600;font-size:19px;letter-spacing:.34em;padding-left:2px}

/* wordmark: flame = the A, "SH" fades to ash */
.wm{display:inline-flex;align-items:baseline;line-height:1;font-family:var(--mono);font-weight:700}
.wm-a{font-size:1.16em;color:#FF6B35;text-shadow:0 0 8px rgba(255,90,40,.55)}
.wm-s{color:#DA8A5C;padding-left:.16em}
.wm-h{color:#8A827B;padding-left:.16em;padding-right:.12em}
.brand .wm{font-size:23px}
.lock-brand .wm{font-size:17px}

.hero{display:flex;flex-direction:column;gap:16px;margin:auto 0}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ember)}
.hero h1{font-weight:800;letter-spacing:-.03em;line-height:1.02;font-size:clamp(36px,11vw,48px);text-wrap:balance}
.hero h1 em{font-style:normal;color:transparent;background:linear-gradient(120deg,var(--ember),var(--ember-2));-webkit-background-clip:text;background-clip:text}
.hero p{color:var(--ink-soft);font-size:15.5px;max-width:34ch}

.foot{display:flex;flex-direction:column;gap:11px}
.in{
  width:100%;background:var(--panel);border:1px solid var(--line-2);color:var(--ink);border-radius:13px;
  padding:14px 15px;font-family:var(--sans);font-size:16px;transition:border-color .2s, box-shadow .2s;
}
.in::placeholder{color:var(--ink-faint)}
.in:focus{outline:none;border-color:var(--ember);box-shadow:0 0 0 3px color-mix(in srgb,var(--ember) 22%,transparent)}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;
  font-family:var(--sans);font-weight:700;font-size:16px;border-radius:13px;padding:14px 18px;transition:transform .12s, filter .2s}
.btn.primary{background:linear-gradient(120deg,var(--ember),var(--ember-2));color:#1a0d08}
.btn.primary:hover{filter:brightness(1.06)}
.btn:active{transform:scale(.98)}
.btn .spin{display:none;width:16px;height:16px;border:2px solid rgba(0,0,0,.3);border-top-color:#1a0d08;border-radius:50%;animation:spin .7s linear infinite}
.btn.loading .lbl{display:none}
.btn.loading .spin{display:block}
@keyframes spin{to{transform:rotate(360deg)}}
.link{background:none;border:none;color:var(--ink-soft);font-family:var(--sans);font-weight:500;font-size:13.5px;cursor:pointer;text-decoration:underline;text-underline-offset:2px;padding:4px}
.link:hover{color:var(--ember)}
.note{font-size:12.5px;color:var(--ink-faint);text-align:center;min-height:16px}
.note.error{color:var(--danger)}
.note.ok{color:var(--good)}

/* ---------- app ---------- */
#app{background:var(--ground-2)}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:calc(11px + env(safe-area-inset-top)) 16px 11px;
  background:color-mix(in srgb,var(--panel) 80%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line)}
.lock-brand{display:flex;align-items:center;gap:9px}
.lock-brand b{font-family:var(--mono);font-weight:600;font-size:15px;letter-spacing:.3em}
.presence{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10.5px;color:var(--ink-faint);
  border:1px solid var(--line);border-radius:999px;padding:3px 8px;text-transform:uppercase;letter-spacing:.08em}
.presence .pdot{width:6px;height:6px;border-radius:50%;background:var(--ink-faint)}
.presence.online .pdot{background:var(--good);box-shadow:0 0 8px var(--good)}
.presence.online{color:var(--good)}
.whoami{display:flex;align-items:center;gap:6px;background:var(--panel);border:1px solid var(--line-2);border-radius:999px;padding:4px 9px 4px 4px;cursor:pointer}
.av{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:12px;color:#140c08;background:var(--ember);flex:none}
.chev{color:var(--ink-faint);font-size:11px}

.menu{position:absolute;top:calc(56px + env(safe-area-inset-top));right:14px;z-index:50;background:var(--panel);
  border:1px solid var(--line-2);border-radius:16px;box-shadow:var(--shadow);min-width:230px;padding:6px;
  display:flex;flex-direction:column;gap:1px;animation:pop .16s ease both;transform-origin:top right}
.menu[hidden]{display:none}
@keyframes pop{from{opacity:0;transform:scale(.95) translateY(-4px)}to{opacity:1;transform:none}}
.menu-head{display:flex;align-items:center;gap:11px;padding:10px 11px 8px}
.menu-head .av{width:34px;height:34px;font-size:14px}
.menu-name{font-weight:700;font-size:14px}
.menu-email{font-size:11px;color:var(--ink-faint);max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sep{height:1px;background:var(--line);margin:4px 6px}
.mi{display:flex;align-items:center;gap:10px;text-align:left;width:100%;background:none;border:none;color:var(--ink);
  font-family:var(--sans);font-weight:600;font-size:14px;padding:11px 12px;border-radius:11px;cursor:pointer}
.mi:hover{background:var(--panel-2)}
.mi.danger{color:var(--danger)}
.mi.burn{color:var(--ember);font-weight:700}
.mi.burn::before{content:"🔥";margin-right:-2px}

/* passphrase lock */
.lockpane{flex:1;display:flex;align-items:center;justify-content:center;padding:24px}
.lockpane[hidden]{display:none}
.lockcard{max-width:340px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:13px}
.lockcard h3{font-weight:700;font-size:21px}
.lockcard p{color:var(--ink-soft);font-size:14px;line-height:1.5}
.lockcard form{display:flex;flex-direction:column;gap:10px;width:100%;margin-top:4px}

/* conversation */
.convo{flex:1;display:flex;flex-direction:column;min-height:0}
.convo[hidden]{display:none}
.scroll{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:16px 14px;display:flex;flex-direction:column;gap:6px}
.daysep{align-self:center;font-family:var(--mono);font-size:10.5px;color:var(--ink-faint);padding:8px 0 4px;letter-spacing:.06em;text-transform:uppercase}
.empty{margin:auto;text-align:center;color:var(--ink-faint);font-size:14px;padding:30px;line-height:1.6}
.empty .ember-mark{margin:0 auto 12px}

.bubble{max-width:82%;padding:9px 13px;border-radius:16px;font-size:15px;line-height:1.38;word-break:break-word;white-space:pre-wrap;animation:rise .28s cubic-bezier(.2,.9,.25,1) both}
@keyframes rise{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.bubble.them{align-self:flex-start;background:var(--panel-2);border:1px solid var(--line);border-bottom-left-radius:5px}
.bubble.me{align-self:flex-end;background:linear-gradient(135deg,#3a2a1e,#2a1c16);border:1px solid #4a3324;border-bottom-right-radius:5px}
.bubble.locked{align-self:center;background:transparent;border:1px dashed var(--line-2);color:var(--ink-faint);font-size:12.5px;max-width:90%;text-align:center}
.bubble .meta{display:flex;align-items:center;gap:5px;font-family:var(--mono);font-size:9.5px;margin-top:4px;color:var(--ink-faint)}
.bubble.me .meta{justify-content:flex-end}
.tick{font-size:10px}
.tick.read{color:var(--ash-blue)}
.bubble-link{color:var(--ember);text-decoration:underline;text-underline-offset:2px;word-break:break-all;font-weight:600}
.bubble.filebubble{padding:6px}
.chat-img{display:block;max-width:100%;max-height:280px;border-radius:11px;background:var(--panel);cursor:zoom-in;min-height:50px}
.file-card{display:flex;align-items:center;gap:10px;padding:8px 10px;min-width:180px}
.file-icon{width:34px;height:34px;border-radius:9px;background:rgba(255,107,53,.16);display:grid;place-items:center;font-size:16px;flex:none}
.file-info{min-width:0;flex:1}
.file-name{font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-size{font-family:var(--mono);font-size:10.5px;color:var(--ink-faint)}
.file-dl{flex:none;background:none;border:1px solid currentColor;color:var(--ember);border-radius:8px;font-family:var(--sans);font-weight:600;font-size:11.5px;padding:5px 9px;cursor:pointer}

.typing-row{padding:0 16px 4px}
.typing-row[hidden]{display:none}
.dots{display:inline-flex;gap:3px;padding:6px 11px;background:var(--panel-2);border:1px solid var(--line);border-radius:14px}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--ink-faint);animation:blink 1.2s infinite}
.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.3}30%{opacity:1}}
.status{text-align:center;font-family:var(--mono);font-size:11px;color:var(--ink-faint);padding:5px}
.status[hidden]{display:none}
.status.err{color:var(--danger)}

.composer{display:flex;gap:8px;align-items:flex-end;padding:10px 12px calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--panel)}
.composer textarea{flex:1;resize:none;background:var(--panel-2);border:1px solid var(--line-2);color:var(--ink);border-radius:14px;
  padding:11px 14px;font-family:var(--sans);font-size:15.5px;line-height:1.35;min-height:44px;max-height:120px}
.composer textarea::placeholder{color:var(--ink-faint)}
.composer textarea:focus{outline:none;border-color:var(--ember)}
.icon-btn{flex:none;width:44px;height:44px;border-radius:13px;border:1px solid var(--line-2);background:var(--panel-2);color:var(--ink-soft);display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{color:var(--ember);border-color:var(--ember)}
.icon-btn svg{width:20px;height:20px}
.icon-btn.send{background:linear-gradient(120deg,var(--ember),var(--ember-2));color:#1a0d08;border:none}

/* overlays */
.overlay{position:absolute;inset:0;z-index:60;background:rgba(6,5,7,.72);backdrop-filter:blur(4px);display:flex;align-items:flex-end;justify-content:center}
.overlay[hidden]{display:none}
.sheet{width:100%;max-width:460px;max-height:86%;background:var(--panel);border-top-left-radius:22px;border-top-right-radius:22px;border:1px solid var(--line-2);display:flex;flex-direction:column;animation:slideup .28s ease both}
@keyframes slideup{from{transform:translateY(30px);opacity:.6}to{transform:none;opacity:1}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}
.sheet-head b{font-size:16px}
.sheet-body{overflow-y:auto;padding:18px;font-size:14.5px;line-height:1.6;color:var(--ink-soft)}
.sheet-body h4{color:var(--ink);font-size:14px;margin:16px 0 5px;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase}
.sheet-body h4:first-child{margin-top:0}
.sheet-body p{margin-bottom:9px}
.sheet-body b{color:var(--ink)}
.sheet-body .ver{font-family:var(--mono);font-size:11px;color:var(--ember)}
.sheet-body .guide-fine{color:var(--ink-faint);font-size:12px;margin-top:14px}
.sheet-body .safety-code{font-family:var(--mono);font-size:20px;color:var(--ember);letter-spacing:.1em;text-align:center;margin:16px 0}

/* burn confirm */
#burn{align-items:center}
.burncard{width:calc(100% - 44px);max-width:360px;background:var(--panel);border:1px solid #5a2a20;border-radius:20px;padding:22px;text-align:center;display:flex;flex-direction:column;gap:11px;align-items:center;box-shadow:0 0 60px -10px rgba(255,60,30,.4)}
.hazard{width:100%;height:8px;border-radius:4px;background:repeating-linear-gradient(45deg,#F5A623 0 12px,#1a181d 12px 24px)}
.burncard h3{font-size:20px;font-weight:800}
.burncard p{color:var(--ink-soft);font-size:13.5px;line-height:1.5}
.hold-note{font-family:var(--mono);font-size:11px;color:var(--ember)}
.burnbtn{position:relative;overflow:hidden;width:100%;background:#2a1512;border:1px solid #7a3226;color:#fff;font-weight:700;border-radius:13px;padding:15px}
.burn-fill{position:absolute;inset:0;left:0;width:0;background:linear-gradient(120deg,var(--ember),var(--ember-2));z-index:0}
.burnbtn .lbl{position:relative;z-index:1}
.burnbtn.arming .burn-fill{transition:width 2s linear;width:100%}

.install-fab{position:fixed;left:50%;transform:translateX(-50%);top:calc(12px + env(safe-area-inset-top));z-index:70;
  background:var(--ember);color:#1a0d08;border:none;border-radius:999px;padding:11px 18px;font-family:var(--sans);font-weight:700;font-size:14px;box-shadow:var(--shadow);cursor:pointer}
.install-fab[hidden]{display:none}

@media (prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}