/* Konnected Tutor */
:root{--bg:#0b1020;--panel:#121a2e;--panel-2:#17213a;--text:#f5f7fb;--muted:#9eabc6;--accent:#7c9cff;--accent-2:#65d6b4;--border:rgba(255,255,255,.09);--shadow:0 18px 60px rgba(0,0,0,.28)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 20% 0%,rgba(124,156,255,.16),transparent 28%),radial-gradient(circle at 85% 5%,rgba(101,214,180,.10),transparent 24%),var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}button,input{font:inherit}
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:16px clamp(20px,4vw,64px);border-bottom:1px solid var(--border);background:rgba(11,16,32,.82);backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}.brand-mark{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#08101e;font-weight:900}.nav{display:flex;gap:8px}.nav a{padding:9px 12px;border-radius:10px;color:var(--muted)}.nav a:hover{background:rgba(255,255,255,.05);color:var(--text)}
#app{max-width:1180px;margin:0 auto;padding:0 22px}.view{display:none;padding:54px 0 70px}.view.active{display:block}.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;min-height:560px}.eyebrow{font-size:.78rem;letter-spacing:.15em;font-weight:800;color:var(--accent-2);margin-bottom:12px}.hero h1,.page-head h1{font-size:clamp(2.4rem,6vw,5.2rem);line-height:.98;margin:0 0 20px;letter-spacing:-.055em}.hero h1 span{color:var(--accent)}.hero p,.page-head p{font-size:1.08rem;line-height:1.7;color:var(--muted);max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{border:0;border-radius:13px;padding:13px 18px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.btn.primary{background:var(--accent);color:#08101e}.btn.secondary{background:var(--panel-2);color:var(--text);border:1px solid var(--border)}.btn.full{width:100%}
.hero-panel,.panel,.chat-shell,.feature-card,.stat,.subject-card{background:rgba(18,26,46,.84);border:1px solid var(--border);box-shadow:var(--shadow)}.hero-panel{border-radius:28px;padding:18px}.today-card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.015));border-radius:20px;padding:22px}.card-label{font-size:.75rem;letter-spacing:.14em;color:var(--accent-2);font-weight:800}.today-card h2{margin:8px 0 20px}.subject-row{display:flex;justify-content:space-between;gap:14px;padding:15px 0;border-top:1px solid var(--border)}.subject-row div{display:flex;flex-direction:column;gap:4px}.subject-row span{font-size:.85rem;color:var(--muted)}.status{align-self:center;border-radius:999px;padding:6px 9px!important;font-size:.72rem!important;font-weight:800!important}.status.developing{background:rgba(124,156,255,.14);color:#b8c6ff!important}.status.new{background:rgba(255,255,255,.06)}
.feature-grid,.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-card,.stat{border-radius:20px;padding:22px}.feature-card .icon{font-size:1.65rem}.feature-card h3{margin:14px 0 8px}.feature-card p,.stat span{color:var(--muted);line-height:1.55}.page-head{margin-bottom:30px}.page-head h1{font-size:clamp(2.2rem,5vw,4rem)}
.subject-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}.subject-card{text-align:left;border-radius:18px;padding:20px;color:var(--text);cursor:pointer}.subject-card:hover,.subject-card.selected{border-color:rgba(124,156,255,.75);transform:translateY(-1px)}.subject-card span{display:block;font-size:1.5rem;margin-bottom:12px}.subject-card strong,.subject-card small{display:block}.subject-card small{margin-top:5px;color:var(--muted);line-height:1.45}
.chat-shell{border-radius:22px;overflow:hidden}.chat-header{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:18px 20px;border-bottom:1px solid var(--border)}.chat-header div{display:flex;flex-direction:column;gap:3px}.chat-header span{color:var(--muted);font-size:.85rem}.online-dot{color:var(--accent-2)!important}.messages{min-height:280px;max-height:460px;overflow:auto;padding:22px;display:flex;flex-direction:column;gap:12px}.message{display:flex}.message.user{justify-content:flex-end}.bubble{max-width:min(720px,86%);padding:13px 15px;border-radius:16px;line-height:1.55}.message.tutor .bubble{background:var(--panel-2)}.message.user .bubble{background:var(--accent);color:#08101e}.chat-form{display:flex;gap:10px;padding:14px;border-top:1px solid var(--border)}.chat-form input{flex:1;min-width:0;border:1px solid var(--border);border-radius:13px;background:#0e1528;color:var(--text);padding:14px 15px;outline:none}.chat-form input:focus{border-color:var(--accent)}.demo-note{margin:0;padding:0 18px 16px;color:var(--muted);font-size:.78rem}
.stats-grid{margin-bottom:16px}.stat{display:flex;flex-direction:column;gap:7px}.stat strong{font-size:1.7rem}.dashboard-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}.panel{border-radius:20px;padding:22px}.panel-head{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:20px}.panel-head h2{margin:0}.panel-head span{font-size:.78rem;color:var(--muted)}.mastery-item{padding:14px 0;border-top:1px solid var(--border)}.mastery-top{display:flex;justify-content:space-between;gap:10px}.mastery-top span,.mastery-item small{color:var(--muted)}.bar{height:8px;background:#0b1224;border-radius:999px;overflow:hidden;margin:10px 0 6px}.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:999px}.mastery-item.muted{opacity:.65}.review-list{padding-left:20px;color:var(--muted);line-height:1.7}.report-box{margin-top:14px;padding:15px;border:1px solid var(--border);border-radius:14px;background:#0e1528}.hidden{display:none}
footer{display:flex;justify-content:space-between;gap:16px;padding:24px clamp(20px,4vw,64px);border-top:1px solid var(--border);color:var(--muted);font-size:.86rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media (max-width:900px){.hero{grid-template-columns:1fr;min-height:auto;padding-top:30px}.feature-grid,.stats-grid,.subject-grid{grid-template-columns:1fr 1fr}.dashboard-grid{grid-template-columns:1fr}}
@media (max-width:620px){.nav{display:none}#app{padding:0 14px}.view{padding-top:36px}.feature-grid,.stats-grid,.subject-grid{grid-template-columns:1fr}.hero h1{font-size:2.8rem}.chat-form{flex-direction:column}footer{flex-direction:column}}