*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:#e5ddd5;color:#111}button,input,textarea{font:inherit}button{cursor:pointer;border:0}.hidden{display:none!important}.auth-view{min-height:100%;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#075e54,#128c7e)}.auth-card{width:min(390px,100%);background:#fff;border-radius:20px;padding:30px;box-shadow:0 15px 45px #0003}.brand-mark{width:64px;height:64px;border-radius:50%;display:grid;place-items:center;background:#075e54;color:#fff;font-weight:800;margin:auto;font-size:18px}.auth-card h1{text-align:center;margin:12px 0 3px}.muted,.tiny{text-align:center;color:#687078}.auth-card label{display:block;margin:18px 0 6px;font-size:14px;font-weight:650}.auth-card input{width:100%;padding:13px;border:1px solid #d8dde0;border-radius:10px;outline:0}.auth-card input:focus{border-color:#128c7e}.primary{background:#075e54;color:#fff;padding:12px 18px;border-radius:10px;font-weight:700}.auth-card .primary{width:100%;margin-top:18px}.error{color:#b42318;font-size:13px;margin-top:10px;min-height:18px}.chat-view{height:100%;display:flex;flex-direction:column}.topbar{height:62px;background:#075e54;color:#fff;display:flex;align-items:center;padding:0 12px;gap:10px;position:relative;z-index:5}.title-wrap{flex:1;font-weight:750;font-size:17px}.title-wrap small{display:block;font-size:11px;font-weight:400;opacity:.85;margin-top:2px}.icon-btn,.round-btn{background:transparent;color:inherit;font-size:27px;width:42px;height:42px;border-radius:50%;display:grid;place-items:center}.layout{display:flex;min-height:0;flex:1}.sidebar{width:310px;background:#fff;border-right:1px solid #ddd;overflow:auto}.side-head{height:58px;display:flex;align-items:center;justify-content:space-between;padding:0 16px}.mini-btn{background:#f2f4f5;border-radius:50%;width:34px;height:34px}.chat-item{width:100%;display:flex;align-items:center;gap:12px;text-align:left;background:#fff;padding:12px 14px;border-bottom:1px solid #eee}.chat-item.active{background:#e9f6f4}.chat-item span:last-child{display:flex;flex-direction:column;gap:3px}.chat-item small{color:#777}.avatar{width:45px;height:45px;border-radius:50%;display:grid;place-items:center;background:#128c7e;color:#fff;font-size:11px;font-weight:800;flex:none}.section-label{font-size:12px;color:#777;padding:14px 15px 7px}.conversation{position:relative;flex:1;min-width:0;display:flex;flex-direction:column;background:#efe7de}.messages{flex:1;overflow:auto;padding:16px 6%;scroll-behavior:smooth;background-image:radial-gradient(#fff4 1px,transparent 1px);background-size:20px 20px}.bubble{max-width:min(78%,620px);margin:5px 0;padding:8px 10px;border-radius:10px;box-shadow:0 1px 1px #0001;word-wrap:break-word;white-space:pre-wrap}.bubble.mine{margin-left:auto;background:#d9fdd3;border-top-right-radius:3px}.bubble.other{background:#fff;border-top-left-radius:3px}.sender{font-size:11px;color:#0b756a;font-weight:750;margin-bottom:3px}.meta{font-size:10px;color:#667;float:right;margin:5px 0 0 10px}.msg-image{max-width:100%;border-radius:8px;display:block}.file-card{display:flex;align-items:center;gap:9px;padding:9px;border-radius:8px;background:#f2f4f5;text-decoration:none;color:#123}.pdf-link{display:flex;align-items:center;gap:8px;padding:12px;background:#f2f4f5;border-radius:8px;text-decoration:none;color:#075e54;font-weight:650}.video-link{display:block;padding:12px;background:#f2f4f5;border-radius:8px;text-decoration:none;color:#075e54}.audio-player{width:230px;max-width:100%}.typing{min-height:20px;height:auto;padding:2px 7% 3px;font-size:11px;color:#6b6b6b;font-style:italic;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.composer{display:flex;align-items:flex-end;gap:5px;padding:8px;min-height:62px;background:#f0f2f5}.round-btn{color:#54656f;font-size:23px;flex:none}.composer textarea{flex:1;resize:none;max-height:120px;border:0;border-radius:20px;padding:11px 14px;outline:0;background:#fff;line-height:20px}.send-btn{width:46px;height:46px;border-radius:50%;background:#075e54;color:#fff;font-size:23px;display:grid;place-items:center;flex:none}.emoji-panel{position:absolute;bottom:68px;left:8px;width:min(350px,calc(100% - 16px));max-height:260px;overflow:auto;background:#fff;border-radius:14px;box-shadow:0 5px 25px #0003;padding:10px;display:grid;grid-template-columns:repeat(8,1fr);gap:4px}.emoji-panel button{background:#fff;font-size:25px;border-radius:7px;padding:5px}.attachment-preview{position:absolute;bottom:65px;left:8px;background:#fff;padding:8px;border-radius:10px;box-shadow:0 3px 15px #0003;z-index:3}.popup{position:fixed;right:10px;top:58px;background:#fff;border-radius:10px;box-shadow:0 4px 20px #0003;z-index:20;overflow:hidden}.popup button{display:block;background:#fff;padding:13px 18px;width:190px;text-align:left}.popup button:hover{background:#f2f4f5}.dialog-card{border:0;border-radius:15px;padding:22px;width:min(360px,90vw)}.dialog-card input{width:100%;padding:11px;margin:7px 0;border:1px solid #ddd;border-radius:9px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:12px}.dialog-actions button{padding:9px 14px;border-radius:8px}.mobile-only{display:none}#toast{position:fixed;bottom:78px;left:50%;transform:translateX(-50%);background:#222;color:#fff;padding:8px 14px;border-radius:20px;opacity:0;pointer-events:none;transition:.2s;z-index:50}.attachment-preview button{margin-left:8px}.tiny{font-size:11px;margin-top:18px}@media(max-width:700px){.sidebar{display:none}.mobile-only{display:grid}.messages{padding:12px 3%}.bubble{max-width:88%}.topbar{height:58px}.auth-card{padding:24px}.emoji-panel{grid-template-columns:repeat(7,1fr)}}
.image-message{display:block;padding:0;border:0;background:transparent;cursor:pointer;max-width:100%;text-align:left}.image-message .msg-image{max-width:min(320px,100%);max-height:360px;object-fit:cover}

body.dark{background:#111b21;color:#e9edef}
body.dark .sidebar,body.dark .chat-item,body.dark .side-head,body.dark .popup,body.dark .popup button,body.dark .dialog-card,body.dark .emoji-panel,body.dark .emoji-panel button{background:#202c33;color:#e9edef}
body.dark .chat-item{border-color:#26343b}body.dark .chat-item.active{background:#2a3942}
body.dark .conversation{background:#0b141a}
body.dark .messages{background-image:radial-gradient(#fff1 1px,transparent 1px)}
body.dark .bubble.other{background:#202c33;color:#e9edef}
body.dark .bubble.mine{background:#005c4b;color:#e9edef}
body.dark .meta,body.dark .chat-item small,body.dark .section-label{color:#aebac1}
body.dark .composer{background:#202c33}body.dark .composer textarea{background:#2a3942;color:#e9edef}
body.dark .round-btn{color:#d1d7db}
body.dark .file-card,body.dark .video-link{background:#2a3942;color:#d9fdd3}
body.dark .popup button:hover{background:#2a3942}

.welcome-title{font-size:clamp(25px,7vw,34px);font-weight:850;text-align:center;letter-spacing:-.7px;color:#075e54;margin-top:2px}
.welcome-hi{text-align:center;font-size:18px;font-weight:700;color:#128c7e;margin:2px 0 8px}
.login-message{text-align:center;line-height:1.45;word-break:break-word}
.login-message-top{margin:8px 0 14px;color:#4a5560;font-size:14px}
.login-message-bottom{margin:12px 0 4px;color:#4a5560;font-size:14px}
.tagline{text-align:center;font-weight:800;color:#075e54;font-size:16px;margin:14px 0 5px;letter-spacing:.2px}
body.dark .auth-card{background:#202c33;color:#e9edef}
body.dark .welcome-title,body.dark .tagline{color:#61d7c8}
body.dark .welcome-hi{color:#7de4d7}
body.dark .login-message{color:#c7d1d5}

.settings-note{font-size:13px;color:#66737a;line-height:1.45}.dialog-card label{display:block;font-size:13px;font-weight:650;margin:12px 0 5px}.dialog-card select,.dialog-card input{width:100%;padding:11px;border:1px solid #d7dcdf;border-radius:9px;background:#fff}.profile-preview-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.profile-large{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#075e54,#25d366);color:#fff;font-size:25px;font-weight:850;overflow:hidden;background-size:cover;background-position:center}.upload-avatar{display:inline-block!important;background:#f1f4f5;padding:9px 12px;border-radius:8px!important;cursor:pointer!important;margin:0!important}.profile-preview-row>button{padding:9px 12px;border-radius:8px;background:#f1f4f5}.avatar.photo{background-size:cover;background-position:center;color:transparent}
body.dark .settings-note{color:#aebac1}.dialog-card select,.dialog-card input{background:#2a3942;color:#e9edef;border-color:#3a4a52}.profile-preview-row>button,.upload-avatar{background:#2a3942!important;color:#e9edef}
.msg-actions{display:flex;gap:5px;justify-content:flex-end;margin-top:3px}.msg-actions button{background:transparent;color:#65747c;font-size:10px;padding:1px 3px}.bubble.mine .msg-actions button{color:#35685f}.edited-mark{font-size:9px;color:#718088;margin-left:4px}

.secondary-btn{padding:8px 11px;border-radius:8px;background:#f1f4f5;color:#075e54;font-weight:650}.admin-user-row{display:flex;align-items:center;justify-content:space-between;padding:9px 0;border-bottom:1px solid #e7eaec}.admin-user-row button{padding:6px 9px;border-radius:7px;background:#fff0f0;color:#b42318}.full-btn{width:100%;margin-top:10px}.admin-card hr{border:0;border-top:1px solid #e2e5e7;margin:16px 0}.admin-card h4{margin:0 0 8px}