:root {
    --bg: #131314;
    --surface: #1e1f20;
    --surface-2: #282a2c;
    --border: rgba(255,255,255,0.09);
    --text: #e3e3e3;
    --dim: #9aa0a6;
    --accent: #1DB954;
    --blue: #4285f4;
    --purple: #a855f7;
    --user-bubble: #1a2e4a;
    --sidebar-w: 270px;
    --ease: cubic-bezier(0.25,0.8,0.25,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:'Google Sans',system-ui,sans-serif;overflow:hidden}

/* ── LOGIN ─────────────────────────── */
#login-page{display:flex;align-items:center;justify-content:center;height:100vh;position:relative}
.login-bg-glow{position:absolute;width:700px;height:700px;border-radius:50%;background:radial-gradient(circle,rgba(29,185,84,.12) 0%,rgba(66,133,244,.08) 40%,transparent 70%);pointer-events:none}
.login-card{position:relative;z-index:1;text-align:center;padding:64px 56px;background:var(--surface);border:1px solid var(--border);border-radius:32px;max-width:460px;width:90%;box-shadow:0 40px 80px rgba(0,0,0,.6)}
.brand-logo{display:flex;justify-content:center;margin-bottom:24px}
.login-card h1{font-size:2.4rem;font-weight:700;letter-spacing:-.5px;background:linear-gradient(135deg,#fff 40%,#1DB954);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:10px}
.login-card p{color:var(--dim);line-height:1.6;margin-bottom:36px}
#login-btn{display:inline-flex;align-items:center;gap:12px;background:var(--accent);color:#000;border:none;padding:16px 32px;border-radius:50px;font-size:1rem;font-weight:600;font-family:inherit;cursor:pointer;transition:.2s var(--ease)}
#login-btn:hover{background:#1ed760;transform:translateY(-2px);box-shadow:0 8px 24px rgba(29,185,84,.3)}

/* ── LAYOUT ────────────────────────── */
#app{display:flex;height:100vh}
.hidden{display:none!important}

/* ── SIDEBAR ───────────────────────── */
.sidebar{width:var(--sidebar-w);flex-shrink:0;display:flex;flex-direction:column;background:var(--bg);border-right:1px solid var(--border);padding:14px 10px}
.sidebar-top{display:flex;align-items:center;justify-content:space-between;padding:8px 8px 20px}
.brand-text{font-size:1.1rem;font-weight:700;background:linear-gradient(90deg,#fff,#1DB954);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.sidebar-label{font-size:.73rem;font-weight:500;color:var(--dim);letter-spacing:.5px;padding:0 10px 8px}
.convo-list{flex:1;overflow-y:auto;margin-bottom:12px}
.convo-list::-webkit-scrollbar{width:0}
.convo-item{padding:9px 12px;border-radius:10px;cursor:pointer;font-size:.87rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:.15s var(--ease);margin-bottom:2px}
.convo-item:hover{background:var(--surface-2);color:var(--text)}
.convo-item.active{background:var(--surface);color:var(--text);font-weight:500}

/* Now Playing */
.now-playing-widget{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:10px 12px;margin-bottom:10px;min-height:58px}
.np-art{width:38px;height:38px;border-radius:6px;background:var(--surface-2);object-fit:cover;flex-shrink:0}
.np-info{flex:1;overflow:hidden}
.np-track{font-size:.82rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.np-sub{font-size:.73rem;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.np-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 6px var(--accent);animation:pulse 2s infinite;flex-shrink:0}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* User Row */
.user-row{display:flex;align-items:center;gap:8px;padding:4px 4px}
.user-avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--purple));display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.75rem;flex-shrink:0}
.user-name{flex:1;font-size:.83rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.user-actions{display:flex;gap:2px}
.icon-btn{background:transparent;border:none;color:var(--dim);cursor:pointer;padding:6px;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:.15s var(--ease)}
.icon-btn:hover{background:var(--surface-2);color:var(--text)}

/* ── MAIN CHAT ──────────────────────── */
.main{flex:1;display:flex;flex-direction:column;overflow:hidden}
#chat-messages{flex:1;overflow-y:auto;display:flex;flex-direction:column;padding:32px 0 8px;scroll-behavior:smooth}
#chat-messages::-webkit-scrollbar{width:4px}
#chat-messages::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:10px}

/* Welcome */
#welcome-screen{margin:auto;text-align:center;padding:0 24px;max-width:640px;width:100%;align-self:center}
.welcome-icon{display:flex;justify-content:center;margin-bottom:24px}
.welcome-title{font-family:'Google Sans Display',sans-serif;font-size:clamp(2rem,4.5vw,3rem);font-weight:500;letter-spacing:-1px;background:linear-gradient(135deg,#fff 30%,#9aa0a6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:36px;line-height:1.2}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chip{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:11px 18px;border-radius:50px;font-size:.88rem;font-family:inherit;cursor:pointer;transition:.2s var(--ease)}
.chip:hover{background:var(--surface-2);border-color:rgba(255,255,255,.18);transform:translateY(-1px)}

/* Messages */
.msg-row-wrap{max-width:780px;width:100%;margin:0 auto;padding:0 20px}
.msg-row{display:flex;gap:14px;margin-bottom:24px;animation:fadeUp .28s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.msg-row.user{flex-direction:row-reverse}
.msg-av{width:34px;height:34px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700}
.msg-row.user .msg-av{background:linear-gradient(135deg,var(--blue),var(--purple))}
.msg-row.assistant .msg-av{background:var(--surface-2);border:1px solid var(--border);font-size:.85rem}
/* Track widget (replaces pill) */
.track-widget{position:relative;display:inline-flex;margin-bottom:10px;align-self:flex-start}
.track-widget-pill{display:inline-flex;align-items:center;gap:6px;background:var(--surface-2);border:1px solid var(--border);border-radius:20px;padding:5px 12px 5px 10px;font-size:.78rem;color:var(--dim);cursor:default;user-select:none;transition:.15s}
.track-widget:hover .track-widget-pill{border-color:rgba(255,255,255,.2);color:var(--text)}
.tw-chevron{transition:transform .2s}
.track-widget:hover .tw-chevron{transform:rotate(180deg)}
.track-widget-card{position:absolute;top:calc(100% + 8px);left:0;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:12px 14px;display:flex;align-items:center;gap:12px;min-width:230px;box-shadow:0 16px 40px rgba(0,0,0,.6);opacity:0;pointer-events:none;transform:translateY(-6px);transition:.2s ease;z-index:100}
.track-widget:hover .track-widget-card{opacity:1;pointer-events:all;transform:translateY(0)}
.tw-art{width:44px;height:44px;border-radius:8px;object-fit:cover;background:var(--surface-2);flex-shrink:0}
.tw-name{font-size:.88rem;font-weight:500;margin-bottom:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:140px}
.tw-artist{font-size:.75rem;color:var(--dim)}
.action-widget{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;color:var(--dim);margin-bottom:8px;align-self:flex-start}

/* Convo item actions */
.convo-item{display:flex;align-items:center;gap:4px;padding:9px 12px;border-radius:10px;cursor:pointer;font-size:.87rem;color:var(--dim);transition:.15s var(--ease);margin-bottom:2px}
.convo-item:hover{background:var(--surface-2);color:var(--text)}
.convo-item.active{background:var(--surface);color:var(--text);font-weight:500}
.convo-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.convo-actions{display:flex;gap:1px;opacity:0;flex-shrink:0;transition:.15s}
.convo-item:hover .convo-actions,.convo-item.active .convo-actions{opacity:1}
.ca-btn{background:transparent;border:none;color:var(--dim);cursor:pointer;padding:3px 4px;border-radius:5px;display:flex;align-items:center;transition:.15s}
.ca-btn:hover{background:rgba(255,255,255,.08);color:var(--text)}
.ca-btn.del:hover{color:#ff6b6b}

/* Chart Widget */
.chart-widget{width:100%;max-width:500px;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:20px;margin-bottom:12px;align-self:flex-start;box-shadow:0 12px 30px rgba(0,0,0,.3)}
.chart-title{font-size:.9rem;font-weight:600;margin-bottom:15px;color:var(--text);text-align:center}
.chart-canvas{width:100% !important;height:240px !important}

/* Toast */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(12px);background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 20px;font-size:.85rem;color:var(--text);opacity:0;transition:.25s ease;pointer-events:none;z-index:2000;white-space:nowrap;box-shadow:0 8px 24px rgba(0,0,0,.4)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Typing dots */
.typing-dots{display:flex;gap:5px;padding:8px 2px}
.dot{width:7px;height:7px;background:var(--dim);border-radius:50%;animation:bounce 1.3s infinite ease-in-out}
.dot:nth-child(1){animation-delay:0s}
.dot:nth-child(2){animation-delay:.18s}
.dot:nth-child(3){animation-delay:.36s}
@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-7px)}}

/* ── INPUT ──────────────────────────── */
.input-wrap{padding:12px 20px 28px;max-width:820px;width:100%;margin:0 auto}
.input-box{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:10px 10px 10px 18px;display:flex;align-items:flex-end;gap:8px;transition:.2s var(--ease)}
.input-box:focus-within{border-color:rgba(255,255,255,.22)}
#chat-input{flex:1;background:transparent;border:none;color:var(--text);font-family:inherit;font-size:.97rem;line-height:1.55;resize:none;outline:none;max-height:180px;overflow-y:auto;padding:5px 0}
#chat-input::placeholder{color:var(--dim)}
#chat-input::-webkit-scrollbar{width:0}
.send-btn{width:38px;height:38px;border-radius:50%;border:none;background:var(--accent);color:#000;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s var(--ease);flex-shrink:0}
.send-btn:disabled{background:var(--surface-2);color:var(--dim);cursor:not-allowed}
.send-btn:not(:disabled):hover{background:#1ed760;transform:scale(1.06)}
.foot-note{text-align:center;font-size:.7rem;color:var(--dim);margin-top:10px}

/* ── BRAIN MODAL ────────────────────── */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.65);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:24px;padding:28px;width:90%;max-width:480px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.modal-title{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:600}
.modal-desc{font-size:.85rem;color:var(--dim);margin-bottom:20px;line-height:1.5}
.brain-input-row{display:flex;gap:8px;margin-bottom:16px}
#brain-input{flex:1;background:var(--surface-2);border:1px solid var(--border);color:var(--text);font-family:inherit;font-size:.9rem;padding:10px 14px;border-radius:12px;outline:none;transition:.15s}
#brain-input:focus{border-color:rgba(255,255,255,.22)}
#brain-add-btn{background:var(--accent);color:#000;border:none;padding:10px 18px;border-radius:12px;font-weight:600;font-family:inherit;cursor:pointer;transition:.15s;white-space:nowrap}
#brain-add-btn:hover{background:#1ed760}
.brain-list{display:flex;flex-direction:column;gap:8px;max-height:280px;overflow-y:auto}
.brain-list::-webkit-scrollbar{width:4px}
.brain-list::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:10px}
.brain-item{display:flex;align-items:center;gap:10px;background:var(--surface-2);border-radius:12px;padding:10px 14px;font-size:.88rem}
.brain-item span{flex:1;line-height:1.4}
.brain-del{background:transparent;border:none;color:var(--dim);cursor:pointer;padding:2px 4px;border-radius:6px;display:flex;align-items:center;transition:.15s;flex-shrink:0}
.brain-del:hover{color:#ff6b6b;background:rgba(255,107,107,.1)}
.brain-count{font-size:.75rem;color:var(--dim);text-align:right;margin-top:10px}

/* ── Markdown content ─────────────────── */
.bubble p{margin:0 0 10px}.bubble p:last-child{margin-bottom:0}
.bubble h1,.bubble h2,.bubble h3,.bubble h4{font-weight:600;margin:14px 0 6px;line-height:1.3}
.bubble h1{font-size:1.2rem}.bubble h2{font-size:1.05rem}.bubble h3{font-size:.95rem}
.bubble ul,.bubble ol{padding-left:22px;margin:6px 0 10px}
.bubble li{margin-bottom:4px;line-height:1.6}
.bubble code:not(pre code){background:rgba(255,255,255,.1);border-radius:5px;padding:2px 7px;font-family:'JetBrains Mono',monospace,sans-serif;font-size:.83rem}
.bubble pre{background:#0d1117;border:1px solid var(--border);border-radius:12px;margin:10px 0;overflow:hidden}
.bubble pre code{display:block;padding:14px 16px;font-size:.83rem;overflow-x:auto;background:transparent;border-radius:0}
.bubble blockquote{border-left:3px solid var(--accent);padding-left:14px;color:var(--dim);margin:8px 0;font-style:italic}
.bubble table{width:100%;border-collapse:collapse;margin:10px 0;font-size:.88rem}
.bubble th{background:rgba(255,255,255,.06);padding:8px 12px;text-align:left;font-weight:600}
.bubble td{padding:8px 12px;border-top:1px solid var(--border)}
.bubble strong{color:#fff;font-weight:600}
.bubble a{color:var(--accent);text-decoration:none}.bubble a:hover{text-decoration:underline}
.bubble hr{border:none;border-top:1px solid var(--border);margin:14px 0}
/* Code block header */
.code-header{display:flex;align-items:center;justify-content:space-between;padding:7px 14px;background:rgba(255,255,255,.04);border-bottom:1px solid var(--border)}
.code-lang{font-size:.7rem;color:var(--dim);font-weight:600;letter-spacing:.6px;font-family:monospace}
.code-copy{background:transparent;border:none;color:var(--dim);cursor:pointer;padding:3px 8px;border-radius:5px;font-size:.72rem;font-family:inherit;transition:.15s;display:flex;align-items:center;gap:4px}
.code-copy:hover{background:rgba(255,255,255,.08);color:var(--text)}