/* Visual layer: midnight theme, glass surfaces, motion. Loaded after styles.css.
   Dark is the default; html[data-theme="light"] keeps the original light look. */

:root{--ease:cubic-bezier(.2,.8,.2,1);--ease-spring:cubic-bezier(.34,1.56,.64,1);--accent-a:#3d7bff;--accent-b:#36c6ff;--accent-c:#2fd4a3;--glow:0 0 0 1px #5b8cff40,0 10px 40px -10px #3d7bff80}

/* ───────── Midnight tokens ───────── */
html[data-theme="dark"]{
  --ink:#eef3fb;--text:#c9d5e6;--muted:#8b9bb3;--faint:#62738d;
  --line:#ffffff14;--line-soft:#ffffff0a;--surface:#0a1222;--card:#0f1a2e;
  --primary:#3d7bff;--primary-600:#2f69ea;--primary-50:#3d7bff1f;--primary-100:#3d7bff40;
  --success:#3fd6a0;--success-50:#3fd6a01f;--danger:#ff7a72;--danger-50:#ff7a7221;--warn:#ffc361;--warn-50:#ffc36121;
  --shadow-sm:0 1px 2px #0006;--shadow:0 12px 40px -12px #000a,0 2px 8px #0005;--shadow-lg:0 30px 80px -20px #000c;
  color-scheme:dark;
}
html[data-theme="dark"] body{background:#060b16}
html[data-theme="dark"] main{background:
  radial-gradient(900px 480px at 78% -8%,#1f4fd633 0,transparent 60%),
  radial-gradient(700px 420px at 8% 4%,#12b5c722 0,transparent 60%),
  radial-gradient(1000px 600px at 50% 120%,#3d2bd61c 0,transparent 60%),
  #060b16}
html[data-theme="dark"] main::before{content:'';position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(#ffffff06 1px,transparent 1px),linear-gradient(90deg,#ffffff06 1px,transparent 1px);background-size:44px 44px;
  mask-image:radial-gradient(ellipse 70% 55% at 50% 20%,#000 30%,transparent 75%)}
main{position:relative;isolation:isolate}
main>*{position:relative}
html[data-theme="dark"] header{background:#060b16b3;border-bottom-color:#ffffff10;backdrop-filter:blur(16px) saturate(140%)}
html[data-theme="dark"] .header-tag{background:#3fd6a01a;color:#6ff0c2;box-shadow:inset 0 0 0 1px #3fd6a033}
html[data-theme="dark"] .quiet-button:hover,html[data-theme="dark"] .icon-button:hover{background:#ffffff0f;color:var(--ink)}

/* ───────── Sidebar ───────── */
.sidebar{background:linear-gradient(180deg,#0a1630 0%,#070f20 55%,#050b17 100%);border-inline-end:1px solid #ffffff0d;position:relative;overflow:hidden}
.sidebar::before{content:'';position:absolute;width:420px;height:420px;top:-220px;inset-inline-start:-160px;border-radius:50%;background:radial-gradient(circle,#3d7bff40,transparent 65%);filter:blur(10px);pointer-events:none;animation:drift 16s var(--ease) infinite alternate}
.sidebar>*{position:relative}
.brand-mark{background:conic-gradient(from 200deg,#2f69ea,#36c6ff,#2fd4a3,#2f69ea);box-shadow:0 8px 24px -6px #3d7bffaa,inset 0 1px 0 #ffffff55;position:relative}
.brand-mark::after{content:'';position:absolute;inset:1.500px;border-radius:10.500px;background:linear-gradient(140deg,#1d4ed8,#0f2f86);z-index:0}
.brand-mark svg{position:relative;z-index:1}
.new-chat{background:linear-gradient(135deg,#3d7bff,#2a5bea 60%,#2049c8);box-shadow:0 10px 28px -10px #3d7bffcc,inset 0 1px 0 #ffffff33;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.new-chat:hover{transform:translateY(-2px);box-shadow:0 16px 34px -10px #3d7bffee,inset 0 1px 0 #ffffff44}
.new-chat:active{transform:translateY(0) scale(.98)}
#chats button{transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease)}
#chats button:hover{transform:translateX(-2px)}
#chats button.active{background:linear-gradient(90deg,#3d7bff26,#3d7bff0a);box-shadow:inset 0 0 0 1px #3d7bff33}
#chats button.active::before{background:linear-gradient(#36c6ff,#3d7bff);box-shadow:0 0 12px #36c6ff}
.local-status{background:#ffffff08;backdrop-filter:blur(8px)}
.local-status i{animation:pulse 2.4s ease-in-out infinite}

/* ───────── Welcome ───────── */
.welcome{max-width:880px;margin-top:3vh}
.hero-visual{position:relative;height:150px;margin:0 0 18px;perspective:900px}
.hero-visual .slide{position:absolute;inset-inline-start:0;top:10px;width:220px;aspect-ratio:16/9;border-radius:12px;
  background:linear-gradient(150deg,#13254a,#0b1630);border:1px solid #ffffff1f;box-shadow:0 20px 50px -18px #000c,0 0 0 1px #3d7bff1a;overflow:hidden;
  transform-origin:center;animation:float 7s var(--ease) infinite}
.hero-visual .slide::before{content:'';position:absolute;inset-inline-end:12px;top:14px;width:46%;height:8px;border-radius:4px;background:#e9f0ff;opacity:.85;box-shadow:0 16px 0 -2px #8fb4f066,0 28px 0 -2px #8fb4f044}
.hero-visual .slide::after{content:'';position:absolute;inset-inline-start:12px;bottom:12px;width:44%;height:46%;border-radius:6px;
  background:linear-gradient(0deg,#3d7bff 0 32%,transparent 32%) 0 100%/18% 100% no-repeat,linear-gradient(0deg,#36c6ff 0 70%,transparent 70%) 28% 100%/18% 100% no-repeat,
  linear-gradient(0deg,#2fd4a3 0 50%,transparent 50%) 56% 100%/18% 100% no-repeat,linear-gradient(0deg,#8fb4f0 0 88%,transparent 88%) 84% 100%/18% 100% no-repeat}
.hero-visual .s1{transform:rotateY(-14deg) rotateZ(-4deg) translateX(-0px);z-index:3}
.hero-visual .s2{transform:rotateY(-14deg) rotateZ(3deg) translateX(-150px) translateY(14px);z-index:2;opacity:.8;animation-delay:-2.3s}
.hero-visual .s3{transform:rotateY(-14deg) rotateZ(-7deg) translateX(-290px) translateY(30px);z-index:1;opacity:.55;animation-delay:-4.6s;background:linear-gradient(150deg,#1e2f5c,#0c1734)}
.hero-visual .s2::after{background:radial-gradient(circle at 50% 50%,transparent 38%,#36c6ff 39% 55%,transparent 56%),conic-gradient(#3d7bff 0 38%,#2fd4a3 0 64%,#8fb4f0 0);border-radius:50%;width:30%;height:auto;aspect-ratio:1;mask:radial-gradient(circle,transparent 42%,#000 43%)}
.hero-visual .glow{position:absolute;inset-inline-start:40px;top:0;width:360px;height:160px;border-radius:50%;background:radial-gradient(ellipse,#3d7bff55,transparent 65%);filter:blur(24px);animation:breathe 6s ease-in-out infinite}
.eyebrow{background:linear-gradient(90deg,#3d7bff22,#36c6ff14);border-color:#3d7bff44;color:#9cc0ff}
html[data-theme="light"] .eyebrow{color:var(--primary)}
.eyebrow span{background:var(--accent-b);box-shadow:0 0 0 0 #36c6ff99;animation:ping 2.2s ease-out infinite}
.welcome h1{background:linear-gradient(100deg,var(--ink) 0%,var(--ink) 40%,#8fc2ff 55%,var(--ink) 70%);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:sheen 7s var(--ease) infinite}
html[data-theme="dark"] .welcome h1{text-shadow:0 0 60px #3d7bff33}
.welcome>p{font-size:16.500px}
.dropzone{position:relative;border:0;background:#ffffff06;box-shadow:inset 0 0 0 1px #ffffff14;overflow:hidden;transition:transform .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease)}
html[data-theme="light"] .dropzone{background:#ffffffc0;box-shadow:inset 0 0 0 1.5px #b9c8de}
.dropzone::before{content:'';position:absolute;inset:0;border-radius:inherit;padding:1.500px;background:conic-gradient(from var(--angle,0deg),transparent 0 70%,#36c6ff,#3d7bff,transparent);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s}
.dropzone:hover{transform:translateY(-2px);background:#3d7bff0f;box-shadow:inset 0 0 0 1px #3d7bff55,0 18px 40px -20px #3d7bff99}
.dropzone:hover::before{opacity:1;animation:spin-angle 2.6s linear infinite}
.dropzone-icon{background:linear-gradient(140deg,#3d7bff33,#36c6ff22);color:#8fc2ff;box-shadow:inset 0 0 0 1px #3d7bff44;transition:transform .35s var(--ease-spring)}
html[data-theme="light"] .dropzone-icon{color:var(--primary)}
.dropzone:hover .dropzone-icon{transform:translateY(-3px) scale(1.06)}
html[data-theme="dark"] .types i{background:#ffffff08;border-color:#ffffff14;color:var(--muted)}
.suggestions{gap:14px}
.suggestions button{position:relative;overflow:hidden;background:var(--card);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
  animation:rise .6s var(--ease) both;animation-delay:calc(var(--i,0) * 70ms + 120ms)}
html[data-theme="dark"] .suggestions button{background:linear-gradient(180deg,#ffffff0a,#ffffff04);border-color:#ffffff12;backdrop-filter:blur(6px)}
.suggestions button::after{content:'';position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),#3d7bff2e,transparent 60%)}
.suggestions button:hover{transform:translateY(-3px);border-color:#3d7bff55;box-shadow:0 20px 44px -22px #3d7bffaa}
.suggestions button:hover::after{opacity:1}
.s-icon{background:linear-gradient(140deg,#3d7bff2a,#2fd4a31f);color:#8fc2ff;box-shadow:inset 0 0 0 1px #3d7bff33;transition:transform .35s var(--ease-spring)}
html[data-theme="light"] .s-icon{color:var(--primary)}
.suggestions button:hover .s-icon{transform:rotate(-6deg) scale(1.08)}
html[data-theme="dark"] .workflow b{background:#ffffff0a;border-color:#ffffff1a;color:#8fc2ff}
.workflow li{animation:rise .6s var(--ease) both;animation-delay:calc(var(--i,0) * 80ms + 420ms)}

/* ───────── Messages ───────── */
.message{animation:msg-in .45s var(--ease) both}
.message.user .bubble{background:linear-gradient(135deg,#2f69ea,#2453d0);color:#fff;box-shadow:0 12px 30px -14px #2f69eaaa}
html[data-theme="dark"] .message.assistant .bubble{background:linear-gradient(180deg,#ffffff0b,#ffffff05);border-color:#ffffff14;backdrop-filter:blur(8px);color:var(--text)}
.message.assistant .avatar{background:conic-gradient(from 200deg,#2f69ea,#36c6ff,#2fd4a3,#2f69ea);box-shadow:0 6px 18px -6px #3d7bffaa}
.message.assistant.pending .bubble{position:relative;padding-inline-end:52px}
html[data-theme="dark"] .message.assistant.pending .bubble{background:linear-gradient(90deg,#ffffff06 0,#3d7bff1a 50%,#ffffff06 100%);background-size:200% 100%}
.message.assistant.pending .bubble::after{content:'';position:absolute;inset-inline-end:18px;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--accent-b);
  box-shadow:-10px 0 0 var(--accent-a),-20px 0 0 #8fb4f0;animation:dots 1.2s ease-in-out infinite}

/* ───────── Report card ───────── */
.artifact-card{position:relative;transition:box-shadow .35s var(--ease),transform .35s var(--ease)}
html[data-theme="dark"] .artifact-card{background:linear-gradient(180deg,#101d35,#0c1629);border-color:#ffffff14}
.artifact-card::before{content:'';position:absolute;inset:-1px;border-radius:17px;padding:1px;pointer-events:none;
  background:linear-gradient(130deg,#3d7bff88,transparent 30%,transparent 70%,#36c6ff66);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.7}
.artifact-card:hover{box-shadow:0 30px 70px -30px #3d7bff88,var(--shadow)}
html[data-theme="dark"] .artifact-icon{background:linear-gradient(140deg,#ff8a5c33,#ff5c8a1f);color:#ffb08f;box-shadow:inset 0 0 0 1px #ff8a5c33}
html[data-theme="dark"] .artifact-actions a,html[data-theme="dark"] .artifact-actions button{background:#ffffff08;border-color:#ffffff14;color:var(--text)}
html[data-theme="dark"] .artifact-actions a:hover,html[data-theme="dark"] .artifact-actions button:hover{background:#3d7bff1f;border-color:#3d7bff66;color:#cfe0ff}
.artifact-actions .primary{background:linear-gradient(135deg,#3d7bff,#2453d0)!important;border-color:transparent!important;color:#fff!important;box-shadow:0 8px 22px -10px #3d7bffdd}
.artifact-actions a,.artifact-actions button{transition:all .25s var(--ease)}
.artifact-actions .primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px -10px #3d7bffee}
.hero{overflow:hidden}
.hero img{transition:transform 1.2s var(--ease),filter .6s var(--ease)}
.hero:hover img{transform:scale(1.025)}
.hero::after{content:'';position:absolute;inset:0;pointer-events:none;background:linear-gradient(0deg,#060b16cc,transparent 42%)}
.hero-actions{z-index:2}
.hero-actions .hero-primary{background:linear-gradient(135deg,#3d7bff,#2453d0);box-shadow:0 10px 30px -8px #3d7bffee}
.hero-actions button{transition:transform .3s var(--ease-spring),background .25s}
.hero-actions button:hover{transform:translateY(-2px)}
html[data-theme="dark"] .thumbnails{background:#060b1666;border-top-color:#ffffff0d}
.thumbnails button{transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s}
.thumbnails button:hover{transform:translateY(-4px) scale(1.02);box-shadow:0 16px 30px -14px #3d7bffaa}
.thumbnails{scroll-behavior:smooth;scrollbar-width:thin}

/* ───────── Composer ───────── */
#composer{position:relative;transition:box-shadow .35s var(--ease),border-color .35s var(--ease),transform .35s var(--ease)}
html[data-theme="dark"] #composer{background:linear-gradient(180deg,#121f38f2,#0d1830f2);border-color:#ffffff17;box-shadow:0 20px 60px -24px #000d,inset 0 1px 0 #ffffff0d;backdrop-filter:blur(14px)}
#composer::before{content:'';position:absolute;inset:-1px;border-radius:19px;padding:1.500px;pointer-events:none;opacity:0;transition:opacity .4s var(--ease);
  background:conic-gradient(from var(--angle,0deg),#3d7bff,#36c6ff,#2fd4a3,#8f7bff,#3d7bff);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
#composer:focus-within{border-color:transparent;box-shadow:0 24px 70px -24px #3d7bff99}
#composer:focus-within::before{opacity:1;animation:spin-angle 5s linear infinite}
html[data-theme="dark"] textarea{color:var(--ink)}
#send{background:linear-gradient(135deg,#3d7bff,#2453d0);box-shadow:0 8px 20px -6px #3d7bffcc;transition:transform .3s var(--ease-spring),box-shadow .3s var(--ease)}
#send:hover:not(:disabled){transform:translateY(-2px) rotate(-4deg);box-shadow:0 12px 26px -6px #3d7bffee}
#send:active:not(:disabled){transform:scale(.94)}
html[data-theme="dark"] .attach-button{background:#ffffff08;border-color:#ffffff14;color:var(--text)}
html[data-theme="dark"] .attach-button:hover{background:#3d7bff1f;border-color:#3d7bff66;color:#cfe0ff}
html[data-theme="dark"] .chip{background:#ffffff0a;border-color:#ffffff17}
.chip{animation:pop .35s var(--ease-spring) both}
html[data-theme="dark"] .progress{background:#0f1a2ee6;border-color:#ffffff14;backdrop-filter:blur(10px)}
.progress-bar i{background:linear-gradient(90deg,#3d7bff,#36c6ff,#2fd4a3,#3d7bff);background-size:200% 100%;animation:flow 1.6s linear infinite;box-shadow:0 0 12px #36c6ff99}
.spinner{border-color:#3d7bff33;border-top-color:var(--accent-b)}

/* ───────── Dialogs & panels ───────── */
dialog{animation:dialog-in .35s var(--ease) both}
dialog::backdrop{animation:fade .3s ease both}
html[data-theme="dark"] dialog:not(#viewer){background:linear-gradient(180deg,#111d34,#0c1629);border:1px solid #ffffff14;color:var(--text)}
html[data-theme="dark"] .versions{background:#0b1427;border-inline-start-color:#ffffff10}
html[data-theme="dark"] .version.current{background:#3d7bff14;border-color:#3d7bff55}
html[data-theme="dark"] table.grid th{background:#0f1a2e}
html[data-theme="dark"] .login-card input,html[data-theme="dark"] .inline-form input,html[data-theme="dark"] .user-form input,html[data-theme="dark"] .user-form select,
html[data-theme="dark"] .log-tools select,html[data-theme="dark"] .library-upload input,html[data-theme="dark"] .library-upload select{background:#ffffff08;border-color:#ffffff17;color:var(--ink)}
html[data-theme="dark"] .rule,html[data-theme="dark"] .fact blockquote{background:#ffffff06}
html[data-theme="dark"] .template-card,html[data-theme="dark"] .library-card{background:#ffffff05}
.template-card,.library-card{transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s}
.template-card:hover,.library-card:hover{transform:translateY(-3px)}
html[data-theme="dark"] .switch span{background:#ffffff26}
html[data-theme="dark"] #toast{background:#132545;border:1px solid #ffffff1a}

/* ───────── Login ───────── */
.login{overflow:hidden;background:#050a15}
.login::before,.login::after{content:'';position:absolute;border-radius:50%;filter:blur(70px);opacity:.75;pointer-events:none}
.login::before{width:620px;height:620px;top:-180px;inset-inline-end:-120px;background:radial-gradient(circle,#2f69ea,transparent 65%);animation:drift 14s var(--ease) infinite alternate}
.login::after{width:520px;height:520px;bottom:-200px;inset-inline-start:-120px;background:radial-gradient(circle,#11b4c5,transparent 65%);animation:drift 18s var(--ease) infinite alternate-reverse}
.login-grid{position:absolute;inset:0;opacity:.5;pointer-events:none;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 60% 60% at 50% 45%,#000,transparent 75%)}
.login-card{position:relative;z-index:1;width:min(420px,100%);background:linear-gradient(180deg,#ffffff12,#ffffff08);border:1px solid #ffffff1f;backdrop-filter:blur(22px) saturate(150%);
  box-shadow:0 40px 100px -30px #000,inset 0 1px 0 #ffffff1a;color:#e8eef8;animation:card-in .7s var(--ease) both}
.login-card h1{color:#fff;font-size:24px}
.login-card p,.login-card label{color:#9fb0c8}
.login-card input{background:#ffffff0d!important;border-color:#ffffff1f!important;color:#fff!important;transition:border-color .25s,box-shadow .25s,background .25s}
.login-card input:focus{background:#ffffff14!important;border-color:#5b8cff!important;box-shadow:0 0 0 4px #3d7bff2e!important}
.login-card .primary-button{background:linear-gradient(135deg,#3d7bff,#2453d0);padding:12px;font-size:15px;box-shadow:0 12px 30px -10px #3d7bffee;transition:transform .25s var(--ease),box-shadow .25s}
.login-card .primary-button:hover{transform:translateY(-1px);box-shadow:0 16px 36px -10px #3d7bff}
.login-card>small{color:#6f84a3}
.login-card .brand-mark{width:52px;height:52px;border-radius:15px}
.login-card .brand-mark::after{border-radius:13.500px}
.login-card .quiet-button{color:#9fb0c8}
.login-error{background:#ff7a7221;color:#ffb0a9}

/* ───────── Theme toggle ───────── */
#themeToggle{position:relative;overflow:hidden}
#themeToggle svg{transition:transform .5s var(--ease-spring)}
#themeToggle:hover svg{transform:rotate(25deg)}

/* ───────── Motion ───────── */
@property --angle{syntax:'<angle>';inherits:false;initial-value:0deg}
@keyframes spin-angle{to{--angle:360deg}}
@keyframes float{0%,100%{translate:0 0}50%{translate:0 -10px}}
@keyframes breathe{0%,100%{opacity:.55;transform:scale(1)}50%{opacity:.9;transform:scale(1.08)}}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(40px,30px) scale(1.12)}}
@keyframes sheen{0%,60%{background-position:100% 0}100%{background-position:-120% 0}}
@keyframes ping{0%{box-shadow:0 0 0 0 #36c6ff99}80%,100%{box-shadow:0 0 0 8px #36c6ff00}}
@keyframes pulse{0%,100%{box-shadow:0 0 0 3px #3ecf9a2e}50%{box-shadow:0 0 0 6px #3ecf9a14}}
@keyframes msg-in{from{opacity:0;transform:translateY(10px) scale(.99)}to{opacity:1;transform:none}}
@keyframes dots{0%,100%{opacity:.3}50%{opacity:1}}
@keyframes pop{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:none}}
@keyframes flow{to{background-position:-200% 0}}
@keyframes dialog-in{from{opacity:0;transform:translateY(14px) scale(.985)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}}
@keyframes card-in{from{opacity:0;transform:translateY(24px) scale(.97)}to{opacity:1;transform:none}}
::view-transition-old(root),::view-transition-new(root){animation-duration:.28s;animation-timing-function:var(--ease)}
html{scroll-behavior:smooth}

@media(max-width:760px){.hero-visual{height:110px}.hero-visual .slide{width:160px}.hero-visual .s3{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}.welcome h1{color:var(--ink);background:none}}
.login-brand{display:inline-block;margin:0 10px 14px;vertical-align:top;line-height:52px;font-weight:700;font-size:15px;color:#cfe0ff;letter-spacing:.2px}
.login-card .brand-mark{display:inline-grid;vertical-align:top}
.hero-visual{height:132px;margin-bottom:10px}