:root, [data-theme="dark"] {
  --bg:#0b1020; --bg-grad-1: rgba(26,33,80,1); --bg-grad-2: rgba(42,28,94,1);
  --panel:#161d3a; --panel-2:#1c2547; --border:#283265;
  --text:#e7ecff; --muted:#9aa6d6; --accent:#6aa9ff; --accent-2:#8b7dff;
  --error-bg: rgba(255,106,138,.12); --error-border: rgba(255,106,138,.4); --error-text: #ffd5df;
  --radius:14px; --shadow:0 10px 30px rgba(0,0,0,.35);
}
[data-theme="light"] {
  --bg:#f4f6ff; --bg-grad-1: rgba(180,200,255,.55); --bg-grad-2: rgba(200,180,255,.55);
  --panel:#ffffff; --panel-2:#f0f3ff; --border:#dfe4f7;
  --text:#161d3a; --muted:#5b6794; --accent:#3a78ff; --accent-2:#7a5dff;
  --error-bg: rgba(220,38,80,.08); --error-border: rgba(220,38,80,.4); --error-text: #b21030;
  --shadow: 0 10px 30px rgba(20,30,80,.08);
}
*{box-sizing:border-box}html,body{margin:0;height:100%}
body{font-family:"Inter",system-ui,sans-serif;color:var(--text);background:radial-gradient(1200px 800px at 10% -10%,var(--bg-grad-1) 0%,transparent 60%),radial-gradient(900px 700px at 110% 10%,var(--bg-grad-2) 0%,transparent 55%),var(--bg);min-height:100vh;-webkit-font-smoothing:antialiased;transition:background-color .25s,color .25s}
.hidden{display:none!important}
.loader{position:fixed;inset:0;display:grid;place-items:center;background:radial-gradient(800px 600px at 50% 40%,#1a2150,#0b1020 70%);z-index:50;transition:opacity .45s ease}
.loader.fade{opacity:0;pointer-events:none}
.loader-inner{text-align:center;color:#e7ecff}
.logo-mark{width:64px;height:64px;margin:0 auto 14px;border-radius:16px;display:grid;place-items:center;font-family:"Playfair Display",serif;font-style:italic;font-size:32px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:var(--shadow)}
.logo-mark.small{width:40px;height:40px;font-size:22px;margin:0;border-radius:12px}
.loader-title{margin:0;font-size:28px}.loader-sub{margin:4px 0 22px;color:#9aa6d6;font-size:14px}
.spinner{width:36px;height:36px;border-radius:50%;margin:0 auto;border:3px solid rgba(255,255,255,.12);border-top-color:#6aa9ff;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.auth{position:fixed;inset:0;display:grid;place-items:center;padding:20px;background:radial-gradient(1200px 800px at 10% -10%,var(--bg-grad-1) 0%,transparent 60%),radial-gradient(900px 700px at 110% 10%,var(--bg-grad-2) 0%,transparent 55%),var(--bg);z-index:40;overflow-y:auto}
.auth-card{background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:28px 24px;max-width:420px;width:100%;box-shadow:var(--shadow);text-align:center}
.auth-card .logo-mark{margin:0 auto 14px}
.auth-title{margin:0 0 6px;font-size:22px}
.auth-sub{color:var(--muted);font-size:14px;margin:0 0 20px;line-height:1.5}
.auth-info{color:var(--muted);font-size:13.5px;margin:0 0 6px;text-align:left}
.auth-info strong{color:var(--text);word-break:break-all}
.auth-form{display:flex;flex-direction:column;gap:12px;text-align:left}
.auth-form label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:500}
.auth-form input{padding:12px 14px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:15px;outline:none;font-family:inherit}
.auth-form input:focus{border-color:var(--accent)}
#auth-code{font-size:22px;letter-spacing:6px;text-align:center;font-weight:600}
.auth-form .btn-primary{width:100%}
.auth-actions-row{display:flex;justify-content:space-between;gap:8px;margin-top:4px}
.auth-error{margin-top:14px;padding:10px 12px;border-radius:10px;background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text);font-size:13.5px;text-align:left}
.app{max-width:880px;margin:0 auto;padding:24px 16px 32px;display:flex;flex-direction:column;min-height:100vh}
.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px}.brand h1{margin:0;font-size:20px;line-height:1}
.brand .tag{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.tabs{display:inline-flex;background:var(--panel);padding:4px;border-radius:999px;border:1px solid var(--border);flex-wrap:wrap}
.tab{background:transparent;color:var(--muted);border:0;padding:8px 14px;border-radius:999px;font-weight:600;font-size:13px;cursor:pointer;transition:all .2s}
.tab:hover{color:var(--text)}
.tab.active{color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 4px 14px rgba(106,169,255,.35)}
.main{flex:1;display:flex}.mode{display:none;flex:1;flex-direction:column}.mode.active{display:flex}
.chat-window{flex:1;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;overflow-y:auto;min-height:380px;max-height:60vh;box-shadow:var(--shadow)}
.msg{display:flex;margin:10px 0}.msg.user{justify-content:flex-end}
.bubble-wrap{max-width:78%;display:flex;flex-direction:column;gap:6px}
.msg.user .bubble-wrap{align-items:flex-end}
.bubble{padding:10px 14px;border-radius:14px;line-height:1.45;font-size:14.5px;white-space:pre-wrap;word-wrap:break-word}
.msg.assistant .bubble{background:var(--panel-2);border:1px solid var(--border);border-top-left-radius:4px}
.msg.user .bubble{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border-top-right-radius:4px}
.msg.error .bubble{background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text)}
.msg-actions{display:flex;gap:6px;padding:0 4px}
.icon-btn{background:var(--panel-2);border:1px solid var(--border);color:var(--muted);width:30px;height:30px;border-radius:8px;display:grid;place-items:center;cursor:pointer;transition:all .2s;padding:0}
.icon-btn:hover{color:var(--text);border-color:var(--accent)}
.icon-btn.active{color:var(--accent);border-color:var(--accent);background:rgba(106,169,255,.12)}
.icon-btn svg{width:16px;height:16px}
.typing .bubble{display:inline-flex;gap:4px}
.typing .dot{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite ease-in-out}
.typing .dot:nth-child(2){animation-delay:.15s}.typing .dot:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}
.composer{display:flex;gap:8px;margin-top:12px}
.composer input{flex:1;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:14.5px;outline:none;transition:border-color .2s}
.composer input:focus{border-color:var(--accent)}
button{cursor:pointer;font-family:inherit}
.composer button,.poem-form button,.btn-primary{padding:12px 18px;border-radius:12px;border:0;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 6px 18px rgba(106,169,255,.3)}
.composer button:disabled,.poem-form button:disabled{opacity:.6;cursor:not-allowed}
.btn-danger{padding:11px 16px;border-radius:10px;border:1px solid var(--error-border);background:var(--error-bg);color:var(--error-text);font-weight:600}
.poem-form{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow)}
.poem-form label,.settings-form label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:500}
.poem-form input,.poem-form select,.settings-form input,.settings-form textarea{padding:11px 12px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:14.5px;outline:none;font-family:inherit;resize:vertical}
.poem-form input:focus,.poem-form select:focus,.settings-form input:focus,.settings-form textarea:focus{border-color:var(--accent)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.poem-output-wrap{margin-top:16px;display:flex;flex-direction:column;gap:10px}
.poem-output{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:22px;font-family:"Playfair Display",Georgia,serif;font-size:17px;line-height:1.7;white-space:pre-wrap;min-height:160px;box-shadow:var(--shadow)}
.poem-output.empty{color:var(--muted);font-style:italic}
.poem-actions{display:flex;justify-content:flex-end;gap:8px}
.history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.history-header h2{margin:0;font-size:18px}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--border);padding:7px 12px;border-radius:8px;font-size:13px}
.btn-ghost:hover{color:var(--text);border-color:var(--accent)}
.history-tabs{display:flex;gap:6px;margin-bottom:12px}
.history-tab{background:var(--panel);border:1px solid var(--border);color:var(--muted);padding:7px 14px;border-radius:8px;font-size:13px;font-weight:600}
.history-tab.active{color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent}
.history-list{display:flex;flex-direction:column;gap:10px}
.history-item{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px;box-shadow:var(--shadow)}
.history-item .meta{font-size:12px;color:var(--muted);margin-bottom:6px;display:flex;justify-content:space-between;gap:10px}
.history-item .q{color:var(--text);font-weight:600;margin-bottom:6px;font-size:14px}
.history-item .a{color:var(--muted);font-size:14px;line-height:1.5;white-space:pre-wrap;max-height:160px;overflow:hidden;position:relative}
.history-item.expanded .a{max-height:none}
.history-item .row-actions{display:flex;gap:8px;margin-top:10px;justify-content:flex-end}
.history-empty{color:var(--muted);text-align:center;padding:30px;font-style:italic}
.settings-card{display:flex;flex-direction:column;gap:18px}
.settings-section{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.settings-section h2{margin:0 0 4px;font-size:16px}
.muted-text{color:var(--muted);font-size:13px;margin:0 0 12px}
.profile-row{display:flex;align-items:center;gap:14px;margin:8px 0 16px}
.avatar{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;font-family:"Playfair Display",serif;font-style:italic;font-size:26px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:var(--shadow);flex:none}
.profile-meta{display:flex;flex-direction:column;gap:2px;min-width:0}
.profile-name{font-weight:700;font-size:15px}
.profile-username{color:var(--muted);font-size:13px}
.settings-form{display:flex;flex-direction:column;gap:12px}
.settings-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:4px}
.theme-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:6px}
.theme-option{background:var(--panel-2);border:2px solid var(--border);border-radius:12px;padding:12px;display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--text);font-weight:600;font-size:13px;cursor:pointer;transition:all .2s}
.theme-option:hover{border-color:var(--accent)}
.theme-option.active{border-color:var(--accent);box-shadow:0 0 0 3px rgba(106,169,255,.2)}
.theme-preview{width:100%;height:46px;border-radius:8px;border:1px solid var(--border)}
.theme-preview.light{background:linear-gradient(135deg,#fff,#e9ecff)}
.theme-preview.dark{background:linear-gradient(135deg,#11172e,#2a1c5e)}
.theme-preview.system{background:linear-gradient(135deg,#fff 50%,#11172e 50%)}
.danger-zone{border-color:var(--error-border)}
.danger-zone h2{color:var(--error-text)}
.app-footer{text-align:center;margin-top:20px;font-size:12px;color:var(--muted)}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--panel);color:var(--text);border:1px solid var(--border);padding:10px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:all .3s;z-index:100;max-width:90%;box-shadow:var(--shadow)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
@media (max-width:520px){.app-header{flex-direction:column;align-items:flex-start}.row{grid-template-columns:1fr}.chat-window{max-height:55vh}.tabs{width:100%;justify-content:space-between}.tab{flex:1}}