/* ── HomeworkHelper · Main Stylesheet ── */
:root {
  --purple:    #3C3489;
  --purple-lt: #EEEDFE;
  --teal:      #0F6E56;
  --teal-lt:   #E1F5EE;
  --blue:      #185FA5;
  --blue-lt:   #E6F1FB;
  --amber:     #BA7517;
  --amber-lt:  #FAEEDA;
  --red:       #712B13;
  --red-lt:    #FAECE7;
  --gray-bg:   #F8F7F4;
  --gray-card: #FFFFFF;
  --gray-bdr:  #D3D1C7;
  --gray-txt:  #5F5E5A;
  --gray-sub:  #888780;
  --text:      #1A1A18;
  --radius:    10px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
     background:var(--gray-bg);color:var(--text);font-size:14px;line-height:1.5}

/* ── Topnav ── */
.topnav{background:var(--purple);padding:0 24px;height:52px;display:flex;align-items:center}
.topnav-inner{width:100%;max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-icon{font-size:20px}
.logo-title{font-size:15px;font-weight:600;color:#fff}
.logo-sub{font-size:10px;color:#AFA9EC}
.nav-links{display:flex;gap:2px;flex:1}
.nav-link{padding:6px 12px;border-radius:6px;color:rgba(255,255,255,.75);text-decoration:none;
          font-size:13px;transition:all .15s}
.nav-link:hover,.nav-link.active{background:rgba(255,255,255,.15);color:#fff}
.nav-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn-upgrade{background:#fff;color:var(--purple);padding:5px 14px;border-radius:20px;
             font-size:12px;font-weight:600;text-decoration:none}

/* ── Main wrap ── */
.main-wrap{max-width:900px;margin:0 auto;padding:1.5rem 1rem}

/* ── Footer ── */
.footer{text-align:center;padding:1.5rem;font-size:12px;color:var(--gray-sub)}
.footer a{color:var(--gray-sub)}

/* ── Page header ── */
.page-header{display:flex;align-items:flex-start;justify-content:space-between;
             margin-bottom:1.25rem;gap:1rem}
.page-title{font-size:20px;font-weight:600;color:var(--text)}
.page-sub{font-size:13px;color:var(--gray-txt);margin-top:2px}
.section-label{font-size:11px;font-weight:600;color:var(--gray-sub);
               text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.mt-1{margin-top:1rem}
.mb-1{margin-bottom:1rem}

/* ── Cards ── */
.card{background:var(--gray-card);border:0.5px solid var(--gray-bdr);border-radius:var(--radius);padding:14px}

/* ── Metrics ── */
.metrics-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-bottom:1rem}
.metric{background:#fff;border:0.5px solid var(--gray-bdr);border-radius:var(--radius);padding:10px 14px}
.metric-label{font-size:11px;color:var(--gray-sub);margin-bottom:3px}
.metric-val{font-size:22px;font-weight:600;color:var(--text)}
.metric-val.green{color:var(--teal)}
.metric-val.blue{color:var(--blue)}

/* ── Tip box ── */
.tip-box{background:var(--blue-lt);border:0.5px solid #85B7EB;border-radius:var(--radius);
         padding:9px 14px;font-size:12px;color:#0C447C;display:flex;gap:8px;
         align-items:flex-start;margin-bottom:10px}
.tip-icon{flex-shrink:0;font-size:15px}

/* ── Progress bar ── */
.prog-wrap{background:#EBEBEB;border-radius:6px;height:7px;margin-bottom:1rem;overflow:hidden}
.prog-fill{height:100%;border-radius:6px;background:var(--teal);transition:width .4s ease}

/* ── Add row ── */
.add-row{display:flex;gap:8px;flex-wrap:wrap}
.input{border:0.5px solid var(--gray-bdr);border-radius:8px;padding:8px 12px;
       font-size:13px;background:#fff;color:var(--text);font-family:inherit;
       transition:border-color .15s}
.input:focus{outline:none;border-color:var(--purple)}
.select{border:0.5px solid var(--gray-bdr);border-radius:8px;padding:8px 10px;
        font-size:13px;background:#fff;color:var(--text);font-family:inherit;cursor:pointer}

/* ── Buttons ── */
.btn{padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;cursor:pointer;
     border:none;font-family:inherit;transition:all .15s;display:inline-flex;
     align-items:center;gap:6px;text-decoration:none}
.btn-primary{background:var(--purple);color:#fff}
.btn-primary:hover{background:#534AB7}
.btn-outline{background:transparent;color:var(--purple);border:0.5px solid var(--purple)}
.btn-outline:hover{background:var(--purple-lt)}
.btn-full{width:100%;justify-content:center}

/* ── Homework list ── */
.hw-list{display:flex;flex-direction:column;gap:7px;margin-bottom:1rem}
.hw-card{background:#fff;border:0.5px solid var(--gray-bdr);border-radius:var(--radius);
         padding:10px 12px;display:flex;align-items:center;gap:10px;transition:border-color .15s}
.hw-card:hover{border-color:#AFA9EC}
.hw-card.done{opacity:.5}
.hw-card.done .hw-title{text-decoration:line-through;color:var(--gray-sub)}
.hw-card.school{border-left:3px solid var(--teal)}
.subj-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.hw-info{flex:1}
.hw-title{font-size:13px;color:var(--text);margin-bottom:3px}
.hw-meta{display:flex;gap:8px;align-items:center;font-size:11px;color:var(--gray-sub)}
.badge{font-size:10px;padding:2px 8px;border-radius:8px;font-weight:600}
.badge-hard{background:var(--red-lt);color:var(--red)}
.badge-med{background:var(--amber-lt);color:var(--amber)}
.badge-easy{background:var(--teal-lt);color:var(--teal)}
.chk-btn{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--gray-bdr);
          background:transparent;cursor:pointer;font-size:13px;color:var(--gray-sub);
          flex-shrink:0;transition:all .15s;display:flex;align-items:center;justify-content:center}
.chk-btn:hover{border-color:var(--teal);color:var(--teal)}
.chk-btn.checked{background:var(--teal);border-color:var(--teal);color:#fff}
.del-btn{background:transparent;border:none;cursor:pointer;color:var(--gray-sub);
         font-size:13px;padding:4px;border-radius:4px;transition:color .15s}
.del-btn:hover{color:var(--red)}
.empty-state{text-align:center;padding:2rem;color:var(--gray-sub);font-size:13px}

/* ── Plan badges ── */
.plan-badge{font-size:11px;padding:3px 10px;border-radius:10px;font-weight:600}
.plan-plus{background:var(--purple-lt);color:var(--purple)}
.plan-family{background:var(--teal-lt);color:var(--teal)}

/* ── Info banner ── */
.info-banner{background:var(--amber-lt);border:0.5px solid #E0B060;border-radius:var(--radius);
             padding:9px 14px;font-size:12px;color:#4A2E06;margin-bottom:1rem}
.info-banner a{color:var(--amber)}

/* ── Quick cards (AI page) ── */
.quick-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-bottom:1rem}
.quick-card{background:#fff;border:0.5px solid var(--gray-bdr);border-radius:var(--radius);
            padding:10px 12px;cursor:pointer;display:flex;align-items:flex-start;gap:10px;
            text-align:left;transition:border-color .15s;font-family:inherit}
.quick-card:hover{border-color:#AFA9EC;background:var(--purple-lt)}
.qc-icon{width:28px;height:28px;border-radius:7px;display:flex;align-items:center;
          justify-content:center;font-size:15px;flex-shrink:0}
.qc-title{font-size:12px;font-weight:600;color:var(--text);margin-bottom:2px}
.qc-sub{font-size:11px;color:var(--gray-sub)}

/* ── Chat ── */
.chat-area{background:#fff;border:0.5px solid var(--gray-bdr);border-radius:var(--radius);
           padding:14px;min-height:300px;max-height:420px;overflow-y:auto;margin-bottom:10px}
.chat-empty{text-align:center;padding:2.5rem 1rem;color:var(--gray-sub)}
.chat-empty-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.chat-empty-sub{font-size:12px;line-height:1.7}
.msg{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px}
.msg-user{flex-direction:row-reverse}
.msg-avatar{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;
             justify-content:center;font-size:14px;flex-shrink:0}
.av-user{background:var(--teal-lt)}
.av-ai{background:var(--purple-lt)}
.msg-label{font-size:10px;color:var(--gray-sub);margin-bottom:3px;font-weight:600}
.bubble{max-width:82%;padding:9px 12px;border-radius:12px;font-size:13px;line-height:1.6}
.bubble-user{background:var(--purple-lt);color:#26215C;border-top-right-radius:3px}
.bubble-ai{background:#F5F4F1;border:0.5px solid var(--gray-bdr);border-top-left-radius:3px}
.tamil-block{margin-top:8px;padding:8px 10px;background:var(--teal-lt);
             border-left:2px solid var(--teal);font-size:12px;color:#085041}
.tamil-label{font-size:10px;font-weight:700;color:var(--teal);margin-bottom:3px;
              text-transform:uppercase;letter-spacing:.04em}
.practice-block{margin-top:8px;padding:8px 10px;background:var(--amber-lt);
                border-left:2px solid var(--amber)}
.practice-label{font-size:10px;font-weight:700;color:var(--amber);margin-bottom:6px;
                 text-transform:uppercase;letter-spacing:.04em}
.pq{font-size:12px;color:#412402;margin-bottom:4px;padding-left:18px;position:relative}
.pq::before{content:attr(data-n)'.';position:absolute;left:0;font-weight:700;color:var(--amber)}
.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#AFA9EC;
     animation:bounce .9s infinite;margin:0 2px}
.dot:nth-child(2){animation-delay:.15s}
.dot:nth-child(3){animation-delay:.30s}
@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-5px)}}
.chat-input-row{display:flex;gap:8px}
.chat-input{flex:1;border:0.5px solid var(--gray-bdr);border-radius:8px;padding:9px 12px;
             font-size:13px;background:#fff;font-family:inherit;resize:none;height:54px;line-height:1.5}
.chat-input:focus{outline:none;border-color:var(--purple)}
.btn-send{align-self:stretch;padding:0 18px}
.tag-btn{font-size:11px;padding:3px 10px;border-radius:12px;background:#F1EFE8;
          color:var(--gray-sub);border:0.5px solid var(--gray-bdr);cursor:pointer;
          font-family:inherit;transition:all .15s}
.tag-btn:hover{border-color:#AFA9EC;color:var(--purple)}

/* ── Auth pages ── */
.auth-page{background:var(--gray-bg);display:flex;align-items:center;
           justify-content:center;min-height:100vh;padding:1rem}
.auth-card{background:#fff;border:0.5px solid var(--gray-bdr);border-radius:14px;
           padding:2rem;width:100%;max-width:400px;display:flex;flex-direction:column;gap:10px}
.auth-logo{font-size:40px;text-align:center}
.auth-title{font-size:20px;font-weight:600;text-align:center}
.auth-sub{font-size:12px;color:var(--gray-sub);text-align:center}
.auth-link{font-size:12px;color:var(--gray-sub);text-align:center}
.auth-link a{color:var(--purple)}
.error-msg{background:var(--red-lt);color:var(--red);padding:8px 12px;
            border-radius:8px;font-size:12px}