:root{
  --yellow:#fffc00;
  --black:#111;
  --gray:#777;
  --light:#f4f4f4;
  --sent:#dfff9a;
  --received:#fff;
  --border:#e8e8e8;
}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f3f3f3;color:#111}
button,input{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
.screen{width:100%;height:100dvh}
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#f5f6ff;--muted:#8c91a8;--line:rgba(255,255,255,.1);--panel:rgba(19,22,42,.78);--panel-solid:#15182d;--accent:#8b6cff;--accent-2:#4da9ff;--danger:#ff7081;--safe:env(safe-area-inset-bottom)}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;font-family:Manrope,ui-sans-serif,sans-serif;background:#080a15;color:var(--ink)}body{overflow:hidden}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.hidden{display:none!important}.screen{width:100%;height:100dvh}
.login-screen{display:grid;place-items:center;padding:24px;position:relative;overflow:hidden;background:radial-gradient(circle at 18% 18%,rgba(83,73,181,.32),transparent 34%),radial-gradient(circle at 84% 85%,rgba(25,104,176,.2),transparent 35%),#080a15}.login-screen:before,.login-screen:after{content:"";position:absolute;border:1px solid rgba(139,108,255,.14);border-radius:50%;animation:drift 14s ease-in-out infinite alternate}.login-screen:before{width:48vw;height:48vw;top:-24vw;right:-10vw}.login-screen:after{width:36vw;height:36vw;bottom:-20vw;left:-8vw;animation-delay:-4s}@keyframes drift{to{transform:translate(25px,18px) scale(1.06);opacity:.5}}
.login-card{position:relative;z-index:1;width:min(430px,100%);padding:42px;border:1px solid var(--line);border-radius:28px;background:linear-gradient(145deg,rgba(25,29,54,.92),rgba(12,15,29,.8));box-shadow:0 30px 90px rgba(0,0,0,.5),inset 0 1px rgba(255,255,255,.08);backdrop-filter:blur(20px)}.brand-mark{width:58px;height:58px;border-radius:18px;display:flex;align-items:center;justify-content:center;gap:5px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 8px 30px rgba(98,104,255,.4);margin-bottom:28px}.brand-mark span{display:block;width:5px;height:22px;border-radius:4px;background:white;transform:skew(-18deg)}.brand-mark span+span{height:30px;opacity:.65}.eyebrow{font:500 10px/1.4 'DM Mono',monospace;letter-spacing:1.7px;color:#8f8af9;margin:0 0 12px}h1{font-size:42px;line-height:1;letter-spacing:3px;margin:0}.subtitle{color:var(--muted);margin:12px 0 30px;font-size:14px}label{display:block;font-size:12px;font-weight:700;color:#c9cbe0;margin:18px 0 8px}input{width:100%;border:1px solid var(--line);background:rgba(7,9,20,.58);color:var(--ink);border-radius:14px;padding:14px 15px;outline:none}input::placeholder{color:#62677f}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(139,108,255,.16)}.password-field{position:relative}.password-field input{padding-right:62px}.field-action{position:absolute;right:7px;top:7px;height:36px;padding:0 9px;border:0;border-radius:9px;background:transparent;color:#a89aff;font-size:11px;font-weight:800}.primary-button{width:100%;height:52px;margin-top:24px;border:0;border-radius:15px;background:linear-gradient(110deg,var(--accent),#6277ff 55%,var(--accent-2));color:#fff;font-weight:800;box-shadow:0 12px 28px rgba(104,99,255,.3);transition:transform .2s,box-shadow .2s}.primary-button:hover{transform:translateY(-2px);box-shadow:0 16px 35px rgba(104,99,255,.4)}.button-loader{display:none;width:16px;height:16px;border:2px solid rgba(255,255,255,.35);border-top-color:white;border-radius:50%;animation:spin .7s linear infinite;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}.primary-button.loading .button-label{display:none}.primary-button.loading .button-loader{display:inline-block}.error{min-height:20px;margin-top:12px;color:var(--danger);font-size:12px}
.chat-screen{display:flex;flex-direction:column;background:radial-gradient(circle at 100% 0,rgba(88,69,177,.13),transparent 36%),#090b18}.topbar{height:80px;flex:0 0 80px;display:flex;align-items:center;justify-content:space-between;padding:12px max(18px,calc((100vw - 920px)/2));background:rgba(10,12,25,.82);border-bottom:1px solid var(--line);backdrop-filter:blur(18px);padding-top:max(12px,env(safe-area-inset-top))}.person{display:flex;align-items:center;gap:12px}.person strong{display:block;font-size:14px}.person span{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:11px;margin-top:3px}.person i{width:6px;height:6px;border-radius:50%;background:#66e2aa;box-shadow:0 0 10px #66e2aa}.avatar{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(145deg,#22294d,#12152a);border:1px solid rgba(139,108,255,.45);color:#a99cff;font-size:16px;font-weight:800}.header-actions{display:flex;gap:8px}.icon-button,.composer-button{width:44px;height:44px;border:1px solid var(--line);border-radius:13px;background:rgba(255,255,255,.04);color:#aeb3ce;font-size:19px}.icon-button:hover,.composer-button:hover{color:#fff;background:rgba(139,108,255,.14)}.messages{flex:1;overflow:auto;padding:26px max(14px,calc((100vw - 760px)/2));display:flex;flex-direction:column;gap:8px;scroll-behavior:smooth}.empty-state{text-align:center;margin:auto;color:var(--muted)}.empty-state h2{color:#e4e6f4;font-size:18px;margin:12px 0 6px}.empty-state p{margin:0;font-size:12px}.empty-icon{width:52px;height:52px;display:grid;place-items:center;margin:auto;border-radius:18px;background:rgba(139,108,255,.12);border:1px solid rgba(139,108,255,.25);color:#a99aff;font-size:25px}.message-row{display:flex;width:100%;animation:message-in .3s ease both}.message-row.mine{justify-content:flex-end}.message-row.theirs{justify-content:flex-start}@keyframes message-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}.message-bubble{max-width:min(78%,560px);padding:11px 14px;border:1px solid var(--line);border-radius:18px;word-break:break-word;white-space:pre-wrap;box-shadow:0 8px 24px rgba(0,0,0,.12)}.mine .message-bubble{background:linear-gradient(135deg,#735bf3,#4a87e8);border:0;border-bottom-right-radius:5px}.theirs .message-bubble{background:rgba(25,29,51,.86);border-bottom-left-radius:5px}.message-text{line-height:1.45;font-size:13px}.message-meta{font:10px 'DM Mono',monospace;color:rgba(255,255,255,.62);text-align:right;margin-top:6px;display:flex;gap:8px;justify-content:flex-end;align-items:center}.message-delete{border:0;background:transparent;color:rgba(255,255,255,.6);font-size:10px;padding:0}.chat-error{text-align:center;color:var(--danger);padding:10px 16px;background:rgba(255,112,129,.08);font-size:12px}.composer{display:flex;align-items:center;gap:8px;padding:10px max(10px,calc((100vw - 760px)/2)) calc(10px + var(--safe));background:rgba(10,12,25,.9);border-top:1px solid var(--line);backdrop-filter:blur(18px)}.composer input{height:44px;padding:11px 14px;background:rgba(255,255,255,.06);border-color:transparent}.composer-button{flex:0 0 44px;background:transparent;border-color:transparent}.composer #send-button{width:44px;height:44px;flex:0 0 44px;border:0;border-radius:13px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-size:22px;font-weight:700}.settings-panel{position:fixed;inset:0;z-index:5}.settings-backdrop{position:absolute;inset:0;background:rgba(2,3,10,.68);backdrop-filter:blur(5px)}.settings-sheet{position:absolute;top:0;right:0;width:min(440px,100%);height:100%;overflow:auto;padding:34px 26px calc(22px + var(--safe));background:#101329;border-left:1px solid var(--line);box-shadow:-20px 0 60px rgba(0,0,0,.35);animation:sheet-in .28s ease}@keyframes sheet-in{from{transform:translateX(30px);opacity:0}to{transform:none;opacity:1}}.sheet-heading{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:30px}.sheet-heading h2{font-size:28px;margin:0}.close-button{width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--muted);font-size:24px}.settings-section{padding:18px 0;border-top:1px solid var(--line)}.section-label{font:500 10px 'DM Mono',monospace;letter-spacing:1.2px;color:#898cf4;text-transform:uppercase;margin:0 0 4px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0;padding:15px 0}.setting-row strong,.privacy-note strong,.install-row strong{display:block;font-size:13px;color:#eef0fb}.setting-row small,.privacy-note small,.install-row small{display:block;color:var(--muted);font-size:11px;margin-top:4px;line-height:1.45}.setting-row.static{cursor:default}.switch{appearance:none;position:relative;width:42px;height:24px;flex:0 0 42px;padding:0;border:0;border-radius:99px;background:#2b2f48;cursor:pointer}.switch:after{content:"";position:absolute;width:18px;height:18px;top:3px;left:3px;border-radius:50%;background:#858aa4;transition:.2s}.switch:checked{background:linear-gradient(90deg,var(--accent),var(--accent-2))}.switch:checked:after{left:21px;background:#fff}.status-pill{font:500 10px 'DM Mono',monospace;color:#77e4b3}.accent-swatch{width:34px;height:18px;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.privacy-note{display:flex;gap:12px;align-items:flex-start;padding-top:14px}.privacy-note>span:first-child{color:#77e4b3;font-size:20px}.install-row{width:100%;display:flex;align-items:center;gap:12px;text-align:left;padding:15px;border:1px solid rgba(139,108,255,.3);border-radius:15px;background:rgba(139,108,255,.1);color:#a99aff}.install-row>span:nth-child(2){flex:1}.install-icon{width:32px;height:32px;display:grid;place-items:center;border-radius:10px;background:rgba(139,108,255,.25);font-size:18px}.ios-help{display:flex;flex-direction:column;gap:7px;margin-top:12px;padding:14px;border-radius:15px;background:rgba(77,169,255,.08);color:#aeb3ce;font-size:11px;line-height:1.5}.ios-help strong{color:#eef0fb;font-size:12px}.sheet-footer{display:flex;justify-content:space-between;padding:25px 0 14px;color:#62677f;font:500 10px 'DM Mono',monospace;letter-spacing:1px}.logout-button{width:100%;height:44px;border:1px solid rgba(255,112,129,.22);border-radius:13px;background:rgba(255,112,129,.06);color:#ff9aa7;font-size:12px;font-weight:700}.toast{position:fixed;z-index:10;right:20px;bottom:88px;width:min(320px,calc(100% - 40px));padding:14px 16px;border:1px solid rgba(139,108,255,.35);border-radius:15px;background:rgba(22,25,48,.94);box-shadow:0 15px 35px rgba(0,0,0,.35);animation:toast-in .3s ease}.toast strong{display:block;font-size:12px}.toast span{display:block;margin-top:4px;color:#aeb3ce;font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}@keyframes toast-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@media(max-width:600px){.login-card{padding:32px 22px;border-radius:24px}.message-bubble{max-width:86%}.settings-sheet{padding-left:20px;padding-right:20px}.composer{gap:4px}.composer input{min-width:0}.composer-button{flex-basis:40px;width:40px}.composer #send-button{flex-basis:44px}}

.emoji-picker{position:fixed;z-index:4;right:max(62px,calc((100vw - 760px)/2 + 62px));bottom:72px;display:flex;flex-wrap:wrap;gap:4px;width:212px;padding:8px;border:1px solid var(--line);border-radius:14px;background:rgba(20,24,46,.96);box-shadow:0 14px 35px rgba(0,0,0,.35)}
.emoji-picker button{width:42px;height:38px;border:0;border-radius:9px;background:transparent;color:var(--ink);font-size:21px}
.emoji-picker button:hover{background:rgba(139,108,255,.18)}
@media(max-width:600px){.emoji-picker{right:58px;bottom:68px}}

/* Apple-style light interface */
:root{--ink:#1d1d1f;--muted:#6e6e73;--line:rgba(60,60,67,.18);--panel:#fff;--panel-solid:#fff;--accent:#007aff;--accent-2:#5ac8fa;--danger:#ff3b30}
html,body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue",sans-serif;background:#f2f2f7;color:#1d1d1f}
.login-screen{background:linear-gradient(145deg,#f2f2f7,#e5e5ea)}
.login-screen:before,.login-screen:after{border-color:rgba(0,122,255,.12)}
.login-card{padding:38px;border:1px solid rgba(255,255,255,.8);border-radius:24px;background:rgba(255,255,255,.86);box-shadow:0 20px 50px rgba(0,0,0,.12);backdrop-filter:blur(24px)}
.brand-mark{border-radius:17px;background:#007aff;box-shadow:0 8px 20px rgba(0,122,255,.24)}
.eyebrow{color:#007aff}
h1{color:#1d1d1f;letter-spacing:1px}
.subtitle,label{color:#6e6e73}
input{border-color:rgba(60,60,67,.18);background:rgba(255,255,255,.72);color:#1d1d1f;border-radius:12px}
input::placeholder{color:#8e8e93}
input:focus{border-color:#007aff;box-shadow:0 0 0 3px rgba(0,122,255,.16)}
.field-action{color:#007aff}
.primary-button{background:#007aff;box-shadow:0 8px 18px rgba(0,122,255,.2)}
.primary-button:hover{box-shadow:0 10px 22px rgba(0,122,255,.28)}
.chat-screen{background:#f2f2f7}
.topbar,.composer{background:rgba(255,255,255,.86);border-color:rgba(60,60,67,.18);backdrop-filter:blur(20px)}
.person strong,.setting-row strong,.privacy-note strong,.install-row strong{color:#1d1d1f}
.person span{color:#6e6e73}
.avatar{background:#e5f1ff;border-color:rgba(0,122,255,.2);color:#007aff}
.icon-button,.composer-button{border-color:rgba(60,60,67,.12);background:rgba(118,118,128,.12);color:#3c3c43}
.icon-button:hover,.composer-button:hover{color:#007aff;background:rgba(0,122,255,.1)}
.messages{scrollbar-color:#c7c7cc transparent}
.empty-state{color:#6e6e73}.empty-state h2{color:#1d1d1f}.empty-icon{background:#e5f1ff;border-color:rgba(0,122,255,.16);color:#007aff}
.message-bubble{box-shadow:0 2px 8px rgba(0,0,0,.08)}
.mine .message-bubble{background:#007aff;color:#fff}
.theirs .message-bubble{background:#fff;color:#1d1d1f;border-color:rgba(60,60,67,.1)}
.message-text{color:#000}
.mine .message-text{color:#fff}
.message-meta{color:#6e6e73}.mine .message-meta{color:rgba(255,255,255,.78)}
.message-delete{color:#6e6e73}.mine .message-delete{color:rgba(255,255,255,.78)}
.composer input{background:rgba(118,118,128,.12);color:#1d1d1f}
.composer #send-button{background:#007aff;color:#fff}
.settings-sheet{background:rgba(249,249,251,.96);border-color:rgba(60,60,67,.18)}
.section-label{color:#007aff}.setting-row small,.privacy-note small,.install-row small{color:#6e6e73}
.status-pill{color:#34c759}.accent-swatch{background:#007aff}
.privacy-note>span:first-child{color:#34c759}.install-row{border-color:rgba(0,122,255,.18);background:#e5f1ff;color:#007aff}.install-icon{background:rgba(0,122,255,.12)}
.ios-help{background:#e5f1ff;color:#6e6e73}.ios-help strong{color:#1d1d1f}
.close-button{border-color:rgba(60,60,67,.12);color:#6e6e73}.logout-button{border-color:rgba(255,59,48,.2);background:rgba(255,59,48,.06);color:#ff3b30}
.emoji-picker{border-color:rgba(60,60,67,.14);background:rgba(255,255,255,.96);box-shadow:0 12px 30px rgba(0,0,0,.16)}
.emoji-picker button{color:#1d1d1f}.emoji-picker button:hover{background:rgba(0,122,255,.1)}
@media(max-width:600px){.login-card{padding:30px 22px}}

/* Editorial refinements */
html,body{font-size:16px;letter-spacing:0}
.login-screen{background:#fff}
.login-screen:before,.login-screen:after{display:none}
.login-card{width:min(470px,100%);padding:8vh 0 5vh;border:0;border-radius:0;background:transparent;box-shadow:none;backdrop-filter:none}
.brand-mark{width:46px;height:46px;margin-bottom:34px;border-radius:50%;box-shadow:none}
.eyebrow{font-size:11px;letter-spacing:0;margin-bottom:18px}
h1{font-size:clamp(42px,6vw,64px);line-height:1.05;letter-spacing:0}
.subtitle{margin:18px 0 42px;font-size:18px;line-height:1.45}
label{margin:20px 0 8px;font-size:13px}
input{height:48px;padding:13px 15px;border-radius:10px}
.primary-button{height:48px;margin-top:28px;border-radius:24px;background:#1d1d1f;color:#fff;box-shadow:none}
.primary-button:hover{transform:none;background:#424245;box-shadow:none}
.chat-screen{background:#f5f5f7}
.topbar{height:66px;flex-basis:66px;padding-left:max(24px,calc((100vw - 980px)/2));padding-right:max(24px,calc((100vw - 980px)/2));background:rgba(255,255,255,.94);backdrop-filter:blur(16px)}
.avatar{width:40px;height:40px;border-radius:50%;font-size:14px;background:#1d1d1f;color:#fff;border:0}
.person strong{font-size:15px;font-weight:600}.person span{font-size:12px}
.icon-button,.composer-button{width:38px;height:38px;border:0;border-radius:50%;background:transparent}
.menu-button{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.menu-button span{display:block;width:17px;height:2px;border-radius:2px;background:currentColor}
.icon-button:hover,.composer-button:hover{background:#e5e5ea}
.messages{padding-top:34px;padding-bottom:34px;gap:10px}
.empty-icon{width:48px;height:48px;border-radius:50%;background:#e5e5ea;border:0;color:#1d1d1f}
.empty-state h2{font-size:20px;font-weight:600}.empty-state p{font-size:14px}
.message-bubble{border-radius:16px!important;box-shadow:0 1px 2px rgba(0,0,0,.08);padding:12px 15px}
.mine .message-bubble,.theirs .message-bubble{background:#fff;color:#000;border:1px solid rgba(60,60,67,.12)}
.message-text,.mine .message-text,.theirs .message-text{color:#000;font-size:14px}
.message-meta,.mine .message-meta,.message-delete,.mine .message-delete{color:#6e6e73}
.composer{padding-top:12px;background:rgba(255,255,255,.94)}
.composer input{height:42px;border-radius:21px;background:#e5e5ea}
.composer #send-button{width:42px;height:42px;flex-basis:42px;border-radius:50%;background:#1d1d1f;color:#fff}
.settings-sheet{border-left:0;box-shadow:-12px 0 40px rgba(0,0,0,.1)}
.sheet-heading h2{font-size:30px;font-weight:600;letter-spacing:0}
.logout-button{border-radius:22px}
@media(max-width:600px){.login-card{padding:5vh 0}.subtitle{font-size:16px;margin-bottom:30px}.topbar{padding-left:16px;padding-right:16px}}

.reply-bar{display:flex;align-items:center;gap:12px;max-width:760px;width:100%;margin:0 auto;padding:8px 14px;border-top:1px solid rgba(60,60,67,.12);background:rgba(255,255,255,.94);color:#6e6e73;font-size:12px}.reply-bar span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}.reply-bar button{border:0;background:transparent;color:#6e6e73;font-size:18px}.message-reply{padding-bottom:6px;color:#6e6e73;font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.message-actions{display:flex;flex-wrap:wrap;gap:4px;margin-top:7px}.message-actions button{border:0;border-radius:8px;padding:3px 6px;background:#e5e5ea;color:#3c3c43;font-size:11px}.setting-row select{border:1px solid rgba(60,60,67,.18);border-radius:9px;background:#e5e5ea;color:#1d1d1f;padding:6px 8px;font-size:11px}