@font-face{font-family:Vazirmatn;src:url("../assets/fonts/vazirmatn-Vazirmatn%5Bwght%5D.ttf") format("truetype");font-weight:100 900;font-display:swap}
@font-face{font-family:Estedad;src:url("../assets/fonts/estedad-Estedad%5Bwght%5D.ttf") format("truetype");font-weight:100 900;font-display:swap}
@font-face{font-family:Instrument Sans;src:url("../assets/fonts/instrumentsans-InstrumentSans%5Bwdth,wght%5D.ttf") format("truetype");font-weight:100 900;font-display:swap}
:root{color-scheme:light;--black:#11100f;--ivory:#f1ece3;--blue:#2b5a8a;--red:#c1374a;--bg:var(--ivory);--surface:#faf7f1;--raised:#f4efe8;--line:#d5cfc5;--ink:var(--black);--muted:#615951;--accent:var(--blue);--accent-dark:#e3ebf4;--danger:#a62c3d;--radius:14px;font-family:Vazirmatn,Tahoma,sans-serif;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}
body{margin:0;min-width:300px}
a{color:var(--accent);text-underline-offset:.25em}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
button:disabled{opacity:.55;cursor:default}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,p{margin:0}
h1,h2,h3{font-family:Estedad,Vazirmatn,Tahoma,sans-serif}
h1{font-size:clamp(1.7rem,4.5vw,3.35rem);line-height:1.45;font-weight:700;letter-spacing:0}
h2{font-size:1.25rem;font-weight:650}
h3{font-size:1rem;font-weight:650}
p,li{line-height:1.8}
small,.muted,.hint{color:var(--muted)}
.hint{font-size:.82rem}
.eyebrow{font-size:.74rem;font-weight:650;letter-spacing:.07em;color:var(--accent)}
.latin{font-family:Instrument Sans,sans-serif;letter-spacing:.22em;direction:ltr}
.pre{white-space:pre-wrap;overflow-wrap:anywhere}
[hidden]{display:none!important}
.skip{position:fixed;inset-inline-start:1rem;top:-4rem;z-index:5;background:var(--bg);padding:.7rem}.skip:focus{top:1rem}
.loading{padding:2rem}
.stack{display:grid;gap:1rem}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem}
.between{justify-content:space-between}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(.9rem,3vw,1.55rem);min-width:0}
.item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:1rem;min-width:0}
.btn{border:1px solid var(--line);border-radius:9px;color:var(--ink);background:var(--raised);padding:.5rem .9rem;min-height:46px;font-weight:550;white-space:normal}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--ivory)}
.btn.subtle{background:transparent}
.btn.danger{color:var(--danger)}
.pill{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:.15rem .65rem;color:var(--muted);font-size:.75rem;white-space:nowrap}
.pill.accent{background:var(--accent-dark);border-color:#a9bfd6;color:var(--accent)}
.pill.warn{color:#854035;border-color:#d7ada0;background:#f8eee8}
.error{color:var(--danger);font-size:.88rem}
.empty{border:1px dashed var(--line);border-radius:12px;padding:1.1rem;color:var(--muted)}
.notice{position:fixed;z-index:9;inset-inline-end:1rem;bottom:1rem;max-width:min(28rem,calc(100vw - 2rem));padding:.8rem 1.1rem;color:var(--ivory);background:#11100f;border:1px solid #514a42;border-radius:12px;box-shadow:0 6px 30px #0005}
.auth{width:min(1060px,calc(100% - 2.6rem));margin:auto;display:grid;grid-template-columns:1.08fr .92fr;min-height:100svh;align-content:center}
.auth-intro,.auth-panel{padding:clamp(1.5rem,5vw,4.1rem);border:1px solid var(--line);min-width:0}
.auth-intro{background:radial-gradient(ellipse at 78% 8%,#292522 0,transparent 62%),#11100f;min-height:505px;display:flex;flex-direction:column;justify-content:space-between;border-radius:0 22px 22px 0}
.auth-intro h1{font-size:clamp(2rem,4.8vw,4.2rem);max-width:none;margin:.85rem 0 1rem}
.auth-panel{background:#faf7f1;border-inline-start:0;display:grid;align-content:center;border-radius:22px 0 0 22px}
.auth-title{font-size:1.65rem}
.brand{display:inline-flex;align-items:center;gap:.65rem;color:var(--ink);text-decoration:none}
.brand img{width:2.55rem;height:2.55rem}
.brand strong{display:block;font-size:.98rem}
.brand small{display:block;font-size:.65rem}
.frame{display:grid;grid-template-columns:208px minmax(0,1fr);min-height:100svh}
.sidebar{position:sticky;top:0;height:100svh;padding:1.4rem 1rem;border-inline-end:1px solid var(--line);display:flex;flex-direction:column;gap:1.5rem;background:#11100f}
.sidebar .brand{margin-inline:.4rem}
.nav{display:grid;gap:.3rem}
.nav button{display:flex;align-items:center;gap:.65rem;text-align:start;color:var(--muted);padding:.63rem .7rem;min-height:46px;border:1px solid transparent;border-radius:9px;background:transparent}
.nav button:hover,.nav button[aria-current="page"]{color:var(--accent);background:var(--accent-dark);border-color:#453f38}
.nav svg{width:1.05rem;height:1.05rem;flex:none;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.profile{margin-top:auto;display:grid;gap:.45rem;padding:.7rem;border-top:1px solid var(--line)}
.profile small{font-size:.72rem}
.workspace{width:min(1100px,100%);margin-inline:auto;padding:clamp(1rem,3.4vw,3rem)}
.top{display:flex;justify-content:space-between;align-items:center;gap:.8rem;border-bottom:1px solid var(--line);padding-bottom:1rem;margin-bottom:1.4rem}
.top .brand{display:none}
.top small{font-size:.75rem}
.page-head{margin-bottom:1.5rem}
.page-head .eyebrow{margin-bottom:.45rem}
.page-head p{margin-top:.55rem}
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(11rem,30%);gap:1rem;background:radial-gradient(ellipse at 13% 7%,#302a25,transparent 64%),#11100f;min-height:245px;align-items:end}
.hero h1{margin:.35rem 0 .65rem}
.hero .date-slab{align-self:stretch;border-inline-start:1px solid #544a43;padding-inline-start:1rem;display:grid;align-content:space-between;gap:1rem}
.date-slab .date-num{font-size:clamp(2rem,7vw,4.2rem);font-weight:600;line-height:1.15;color:var(--accent)}
.cards{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(min(230px,100%),1fr))}
.split{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:1rem;align-items:start}
label{display:grid;gap:.35rem;font-size:.85rem;font-weight:550}
input:not([type=checkbox]),select,textarea{width:100%;padding:.62rem .7rem;border:1px solid #b8aea0;border-radius:8px;background:#fffcf7;color:var(--ink);min-height:46px}
textarea{resize:vertical;min-height:100px}
input[type=date],input[type=datetime-local]{direction:ltr;text-align:left}
.checks{display:flex;flex-wrap:wrap;gap:.6rem;max-height:13rem;overflow:auto;padding:.2rem}
.check{display:inline-flex;align-items:center;gap:.4rem;padding:.35rem .6rem;border:1px solid var(--line);border-radius:8px}
input[type=checkbox]{accent-color:var(--accent);width:1.04rem;height:1.04rem;margin:0}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem}
fieldset{min-width:0;margin:0;border:1px solid var(--line);border-radius:10px;padding:.7rem}
legend{padding-inline:.35rem;color:var(--muted);font-size:.84rem}
summary{cursor:pointer;color:var(--accent);width:fit-content}
details[open] summary{margin-bottom:.8rem}
.cal{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:.3rem;direction:rtl}
.cal-heading{text-align:center;color:var(--muted);font-size:.73rem}
.day{display:grid;justify-items:center;gap:.1rem;align-content:center;min-height:44px;border:1px solid var(--line);border-radius:8px;background:#faf7f1;color:var(--ink);padding:.2rem}
.day:hover,.day[aria-pressed=true]{border-color:var(--accent)}
.day[aria-pressed=true]{background:var(--accent-dark)}
.day.today{color:var(--accent)}
.dots{display:flex;gap:.2rem;min-height:.35rem}
.dot{height:.35rem;width:.35rem;border-radius:50%;background:var(--accent)}
.dot.leave{background:#c1374a}
.chat{display:grid;grid-template-columns:minmax(12rem,.42fr) minmax(0,1fr);gap:1rem;align-items:start}
.rooms{display:grid;gap:.35rem;max-height:350px;overflow:auto}
.rooms button{text-align:start}
.rooms [aria-pressed=true]{border-color:var(--accent);background:var(--accent-dark)}
.messages{display:flex;flex-direction:column;gap:.5rem;height:clamp(230px,46vh,560px);overflow:auto;padding:.2rem}
.bubble{background:var(--raised);border-radius:12px;padding:.55rem .7rem;max-width:85%;width:fit-content}
.bubble.own{align-self:end;background:var(--accent-dark)}
.bubble small{display:block;font-size:.68rem;margin-top:.2rem}
.diff{display:flex;flex-wrap:wrap;gap:.25em .45em;line-height:1.8}
.diff del{color:var(--danger)}.diff ins{color:#854035;text-decoration:none;border-bottom:1px dotted}
.invite-result{word-break:break-all}
@media(max-width:780px){
 .frame{display:flex;flex-direction:column}
 .sidebar{height:auto;top:auto;bottom:0;position:fixed;width:100%;z-index:4;padding:.2rem .35rem calc(.25rem + env(safe-area-inset-bottom));border-inline-end:0;border-top:1px solid var(--line);background:#11100f}
 .sidebar .brand,.profile{display:none}
 .nav{display:flex;justify-content:safe center;gap:.2rem;overflow:auto}
 .nav button{display:grid;justify-items:center;align-content:center;text-align:center;gap:.08rem;padding:.35rem .42rem;font-size:.68rem;white-space:nowrap;flex:none}
 .workspace{padding-bottom:calc(5rem + env(safe-area-inset-bottom))}
 .top .brand{display:inline-flex}.top .breadcrumb{display:none}
 .notice{bottom:calc(4.5rem + env(safe-area-inset-bottom))}
}
@media(max-width:610px){
 .auth{display:block;margin:1.1rem auto;width:calc(100% - 2rem);min-height:auto}
 .auth-intro{min-height:230px;gap:1.2rem;border-radius:16px 16px 0 0}
 .auth-panel{border-inline-start:1px solid var(--line);border-top:0;border-radius:0 0 16px 16px}
 .split,.chat{grid-template-columns:1fr}.rooms{max-height:145px}
 .hero{grid-template-columns:minmax(0,1fr) minmax(5rem,26%);min-height:200px}
 .hero .date-slab{padding-inline-start:.65rem}
 .top .label-long{display:none}
 .fields{grid-template-columns:1fr}
}

/* SONGE's ivory page and black stage, with spectral blue for actions. */
.auth-intro,.hero,.sidebar,.top .brand{color:var(--ivory)}
.auth-intro,.hero{position:relative;isolation:isolate;overflow:hidden}
.auth-intro::after,.hero::after{
  content:"";position:absolute;inset-block:0;inset-inline-end:0;width:54%;z-index:-1;
  background:url("../assets/songe-symbol-light.svg") no-repeat center/85% auto;opacity:.11;pointer-events:none;
}
.auth-intro .eyebrow,.auth-intro .muted{color:#d6cdc1}
.auth-intro h1{margin:.6rem 0}
.brand{display:inline-flex;flex-direction:column;align-items:flex-start;gap:.32rem;direction:ltr;width:max-content}
.brand img{width:clamp(88px,10vw,135px);height:auto;display:block}
.brand small{font:650 .55rem/1.2 Instrument Sans,sans-serif;letter-spacing:.23em;color:#ded5c9}
.sidebar .brand{margin:.6rem .55rem 0;align-self:flex-start}
.nav button{color:#d3cbc0}
.nav button[aria-current="page"],.nav button:hover{color:var(--ivory);background:#28231f;border-color:#453e36}
.nav button[aria-current="page"]{box-shadow:inset -3px 0 var(--red)}
.sidebar .profile{border-color:#413a33}
.sidebar .profile small{color:#d3cbc0}
.sidebar .btn{color:var(--ivory);border-color:#50473f}
.top .brand{background:var(--black);padding:.58rem .65rem;border-radius:6px}
.top .brand img{width:70px}.top .brand small{font-size:.43rem}
.workspace .top{padding-bottom:.9rem;margin-bottom:1.7rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:8px;padding:.6rem 1.05rem;font-weight:650}
.btn:not(.primary):hover{background:#ece6dd}
.btn.primary:hover{background:#22486e;border-color:#22486e}
.btn.primary:active,.task-card:active{transform:translateY(1px)}
.btn.subtle{background:transparent}
.btn.danger{border-color:#d9acae;background:#fcf1f1}
.btn[disabled]{transform:none}
.card{box-shadow:0 2px 0 #11100f08}
.item{border-radius:10px}
.pill{min-height:26px;padding:.11rem .6rem}
.home{gap:1.3rem}
.home-header h1{margin-top:.25rem}
.home .hero{display:block;background:#11100f;min-height:0;padding:clamp(1.35rem,4vw,2.6rem);border-color:#11100f}
.hero-content{max-width:37rem;display:grid;gap:.47rem}
.hero h2{font-size:clamp(1.35rem,3.8vw,2.28rem);line-height:1.5}
.hero p:not(.eyebrow){color:#e0d7ca}
.hero .hero-place{font-size:.86rem}
.hero .row{margin-top:.6rem}
.hero .btn.primary{background:var(--ivory);color:var(--black);border-color:var(--ivory)}
.hero .btn.primary:hover{background:#d8cdbd}
.stage-label{color:#e0d7ca;display:flex;align-items:center;gap:.55rem}
.stage-label span{background:var(--red);width:8px;height:8px;border-radius:50%}
.home-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem}
.task-card{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;text-align:start;gap:.75rem;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:.85rem 1rem;min-height:74px}
.task-card:hover{border-color:var(--blue);background:#f5f7f9}
.task-card svg{width:1.4rem;height:1.4rem;stroke:var(--blue);fill:none;stroke-width:1.55;stroke-linecap:round;stroke-linejoin:round}
.task-card strong,.task-card small{display:block}
.task-card small{font-size:.78rem;margin-top:.15rem}
.task-card b{font-size:1.1rem;color:var(--blue)}
.quiet-links{gap:.45rem}
.quiet-links .btn{border-color:transparent;color:var(--muted)}
.setup-steps{display:grid;gap:.4rem;margin:0;padding-inline-start:1.45rem}
.setup-steps li::marker{color:var(--blue);font-weight:700}
.settings>section:first-child{border-top:3px solid var(--blue)}
#main:focus,.lesson-stage:focus,.lesson-summary:focus{outline:none}
.lesson-stage{padding:clamp(1rem,3vw,2rem)}
.lesson-stage progress{width:100%;height:.6rem;accent-color:var(--blue)}
.lesson-cue{font-family:Estedad,Vazirmatn,sans-serif;font-size:clamp(1.15rem,3.6vw,1.7rem);line-height:1.9;padding:1rem;border-inline-start:3px solid var(--blue);background:var(--raised);border-radius:7px}
.lesson-summary{border-top:3px solid var(--blue)}
.lesson-summary strong.score{font-family:Estedad,Vazirmatn,sans-serif;font-size:2.6rem;color:var(--blue)}
.diff ins{color:#245587}.diff del{color:var(--danger)}
.calendar-actions{margin-bottom:.9rem}
.day[aria-pressed=true]{font-weight:750}
@media(max-width:780px){
 .sidebar{padding:.2rem .55rem calc(.25rem + env(safe-area-inset-bottom));border-top-color:#39322d}
 .sidebar .brand{display:none}
 .nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));overflow:visible}
 .nav button{min-height:52px;font-size:.75rem}
 .nav button[aria-current="page"]{box-shadow:inset 0 2px var(--red)}
 .workspace .top{margin-bottom:1.1rem}
 .top .btn{padding-inline:.7rem}
 .auth-intro::after,.hero::after{width:63%;background-size:95% auto}
}
@media(max-width:520px){
 .home-actions{grid-template-columns:1fr}
 .task-card{min-height:63px}
 .quiet-links .btn{padding-inline:.45rem}
 .hero-content{max-width:100%}
 .auth-intro{min-height:200px}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important}}