:root{--ink:#37333b;--muted:#948c96;--line:#f1eaf0;--pink:#f49dbd;--pink-deep:#e97da5;--pink-pale:#fff2f7;--lav:#eee9ff;--green:#bdebdc;--shadow:0 18px 55px rgba(118,91,113,.13)}
*{box-sizing:border-box}body{margin:0;background:#fffafc;color:var(--ink);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:0}button,input,textarea{font:inherit}button{cursor:pointer;border:0}button:disabled{opacity:.5;cursor:not-allowed}
.app-shell{min-height:100vh;padding:22px;background:linear-gradient(135deg,#fff 0%,#fff8fb 100%)}
.loading-screen,.auth-card,.chat-layout{max-width:1160px;margin:0 auto}.loading-screen{min-height:90vh;display:grid;place-content:center;text-align:center;color:var(--muted)}
.cute-mark{width:54px;height:54px;margin:0 auto 12px;border-radius:20px;display:grid;place-items:center;background:var(--pink-pale);color:var(--pink-deep);font-size:28px;animation:bob 1.8s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-5px) rotate(5deg)}}@keyframes rise{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
.auth-card{min-height:calc(100vh - 44px);display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:60px;padding:50px}.brand-copy{padding:20px}.eyebrow{color:var(--pink-deep);font-size:13px;font-weight:700;letter-spacing:1px}.brand-copy h1{font-size:clamp(34px,5vw,60px);line-height:1.1;margin:14px 0;color:#312d35}.brand-copy p{color:var(--muted);line-height:1.9;max-width:430px}.notice{margin-top:26px;padding:16px 18px;border:1px solid #ffe0eb;border-radius:18px;background:#fff7fa;color:#7c6572;line-height:1.7;font-size:14px}.auth-panel{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:26px;padding:30px;animation:rise .45s ease}.auth-tabs{display:flex;gap:8px;margin-bottom:25px;padding:4px;background:#fff5f8;border-radius:14px}.auth-tabs button{flex:1;background:transparent;padding:10px;border-radius:10px;color:var(--muted)}.auth-tabs button.active{background:#fff;color:var(--pink-deep);box-shadow:0 4px 14px rgba(233,125,165,.14);font-weight:700}.field{display:grid;gap:8px;margin:15px 0}.field label{font-size:13px;color:#726774}.field input,.composer textarea{border:1px solid var(--line);background:#fffdfd;border-radius:13px;padding:13px 14px;outline:0;transition:.2s}.field input:focus,.composer textarea:focus{border-color:#f4b2ca;box-shadow:0 0 0 4px #fff0f5}.primary{width:100%;padding:13px 16px;border-radius:13px;background:var(--pink);color:white;font-weight:700;transition:.2s}.primary:hover{background:var(--pink-deep);transform:translateY(-1px)}.form-error{min-height:20px;color:#cf6588;font-size:13px;margin:7px 0}.hint{font-size:12px;color:var(--muted);line-height:1.6;margin-top:16px}
.chat-layout{height:calc(100vh - 44px);min-height:620px;display:grid;grid-template-columns:280px 1fr;background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:var(--shadow);animation:rise .45s ease}.sidebar{background:#fffafd;border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.profile{display:flex;align-items:center;gap:12px;padding:23px 20px;border-bottom:1px solid var(--line)}.avatar{width:42px;height:42px;border-radius:15px;background:var(--lav);display:grid;place-items:center;font-weight:800;color:#8173b0;flex:none}.profile strong{display:block;font-size:14px}.profile small{display:block;color:var(--muted);margin-top:3px}.side-title{display:flex;justify-content:space-between;align-items:center;padding:18px 18px 8px;font-size:12px;color:var(--muted)}.friend-list{padding:5px 10px;overflow:auto}.friend{width:100%;display:flex;align-items:center;gap:10px;padding:12px 10px;background:transparent;border-radius:14px;text-align:left;color:var(--ink);transition:.2s}.friend:hover,.friend.active{background:#fff0f5}.friend .avatar{width:36px;height:36px;border-radius:12px;background:#f5edff}.friend-copy{min-width:0}.friend-copy b{display:block;font-size:14px}.friend-copy small{display:block;color:var(--muted);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-footer{margin-top:auto;padding:14px;border-top:1px solid var(--line);display:grid;gap:8px}.quiet-button{padding:10px;border-radius:11px;background:#fff;color:#827985;font-size:13px}.quiet-button:hover{background:#fff0f5;color:var(--pink-deep)}
.main-panel{min-width:0;display:flex;flex-direction:column;background:#fff}.chat-header{min-height:78px;padding:18px 24px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.chat-header h2{font-size:17px;margin:0}.chat-header p{font-size:12px;color:var(--muted);margin:5px 0 0}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#79d5ad;margin-right:5px}.announcement{margin:16px 24px 0;padding:11px 14px;border-radius:13px;background:#fffaf0;color:#8d795d;font-size:13px;line-height:1.6}.messages{flex:1;overflow-y:auto;padding:22px 24px 10px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}.empty-state{margin:auto;text-align:center;color:var(--muted);font-size:14px}.empty-state .cute-mark{width:45px;height:45px;font-size:22px}.message-row{display:flex;gap:9px;max-width:78%;animation:rise .25s ease}.message-row.mine{align-self:flex-end;flex-direction:row-reverse}.message-bubble{background:#fff5f8;border:1px solid #ffe4ed;border-radius:16px 16px 16px 5px;padding:10px 13px;line-height:1.6;font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere}.mine .message-bubble{background:#fbe0eb;border-color:#f8d0df;border-radius:16px 16px 5px 16px}.message-time{font-size:10px;color:#b4aab2;margin-top:4px}.mine .message-time{text-align:right}.message-image{display:block;max-width:250px;max-height:280px;border-radius:11px;object-fit:cover;margin-bottom:5px}.composer{padding:14px 20px 18px;border-top:1px solid var(--line);background:#fff}.composer textarea{width:100%;min-height:46px;max-height:120px;resize:none;border-radius:14px}.composer-bar{display:flex;justify-content:space-between;align-items:center;margin-top:9px;gap:10px}.composer-actions{display:flex;gap:7px;align-items:center}.icon-button{width:35px;height:35px;border-radius:11px;background:#fff5f8;color:var(--pink-deep);font-size:17px}.icon-button:hover{background:#ffe6ef}.send-button{padding:10px 19px;border-radius:11px;background:var(--pink);color:#fff;font-size:13px;font-weight:700}.send-button:hover{background:var(--pink-deep)}.file-name{font-size:12px;color:var(--muted);max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.settings{padding:16px 20px;border-top:1px solid var(--line);background:#fffafd}.settings summary{cursor:pointer;color:#756877;font-size:13px}.settings-form{display:flex;gap:8px;margin-top:12px}.settings-form input{flex:1;min-width:0;border:1px solid var(--line);border-radius:10px;padding:9px 10px}.settings-form button{padding:9px 13px;border-radius:10px;background:var(--pink);color:#fff;font-size:12px}.toast{position:fixed;right:25px;bottom:25px;background:#38333b;color:#fff;padding:11px 15px;border-radius:12px;font-size:13px;box-shadow:var(--shadow);animation:rise .25s ease;z-index:3}.toast.error{background:#c85f83}
@media(max-width:820px){.app-shell{padding:0}.auth-card{min-height:100vh;display:block;padding:28px 18px}.brand-copy{padding:25px 5px 18px}.brand-copy h1{font-size:39px}.chat-layout{height:100vh;min-height:0;border-radius:0;border:0;display:block}.sidebar{height:auto;border-right:0;border-bottom:1px solid var(--line)}.profile{padding:14px 16px}.side-title{display:none}.friend-list{display:flex;overflow-x:auto;padding:10px 12px;gap:7px}.friend{min-width:170px;background:#fff}.sidebar-footer{display:none}.main-panel{height:calc(100vh - 135px)}.chat-header{min-height:64px;padding:13px 16px}.announcement{margin:10px 16px 0}.messages{padding:16px}.message-row{max-width:88%}.composer{padding:10px 12px 13px}}