:root{
  --bg:#f6f8fb;
  --bg-2:#eef3f8;
  --panel:#ffffff;
  --panel-2:rgba(255,255,255,.82);
  --line:rgba(13, 32, 52, .08);
  --text:#09131f;
  --muted:#5d6b7d;
  --green:#008a3d;
  --green-2:#00b853;
  --black:#091018;
  --accent:#0a7c38;
  --shadow:0 20px 60px rgba(13,32,52,.12);
  --radius:26px;
  --radius-sm:18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,sans-serif;background:
radial-gradient(circle at top left, rgba(0,184,83,.09), transparent 25%),
radial-gradient(circle at right, rgba(0,138,61,.08), transparent 20%),
linear-gradient(180deg, #fbfcfe 0%, #f1f5f9 100%);color:var(--text);min-height:100%}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.glass{background:var(--panel-2);backdrop-filter: blur(16px);border:1px solid rgba(255,255,255,.58);box-shadow:var(--shadow)}
.center-auth{display:grid;place-items:center;min-height:100vh;padding:24px}
.auth-card{width:min(1120px,100%);display:grid;grid-template-columns:1.08fr .92fr;overflow:hidden;border-radius:36px;background:#fff;box-shadow:0 30px 90px rgba(5,20,40,.16);border:1px solid rgba(255,255,255,.7)}
.hero-panel{position:relative;padding:48px;min-height:720px;background:
linear-gradient(140deg, rgba(9,16,24,.95), rgba(10,124,56,.88)),
url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80') center/cover}
.hero-panel::after{content:"";position:absolute;inset:0;background:
radial-gradient(circle at 20% 15%, rgba(255,255,255,.18), transparent 20%),
radial-gradient(circle at 80% 40%, rgba(255,255,255,.1), transparent 18%)}
.hero-inner{position:relative;z-index:2;display:flex;flex-direction:column;height:100%}
.logo-badge{display:flex;align-items:center;gap:16px;margin-bottom:36px}
.logo-badge img{width:88px;height:88px;object-fit:contain;filter: drop-shadow(0 10px 30px rgba(0,0,0,.25))}
.logo-badge div strong{display:block;font-size:1.35rem;color:#fff}
.logo-badge div span{color:rgba(255,255,255,.75)}
.hero-kicker{color:#cbffdf;letter-spacing:.18em;font-size:.8rem;text-transform:uppercase;font-weight:800}
.hero-title{font-size:clamp(2.4rem,5vw,4.7rem);line-height:.94;font-weight:900;color:#fff;max-width:620px;margin:16px 0}
.hero-copy{max-width:580px;font-size:1.05rem;color:rgba(255,255,255,.84);line-height:1.7}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:auto;padding-top:28px}
.metric{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:18px;color:#fff}
.metric strong{display:block;font-size:2rem}
.metric span{color:rgba(255,255,255,.75)}
.form-panel{padding:42px;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#fff,#f6fbf7)}
.auth-box{width:min(450px,100%)}
.auth-box h1{font-size:2rem;margin:.1rem 0 1rem}
.auth-box p{color:var(--muted);line-height:1.7}
.input{width:100%;border:1px solid var(--line);background:#fff;border-radius:18px;padding:16px 18px;outline:none;transition:.25s}
.input:focus{border-color:rgba(0,138,61,.45);box-shadow:0 0 0 4px rgba(0,138,61,.08)}
.field{margin:0 0 14px}
.label{display:block;font-size:.9rem;font-weight:700;margin-bottom:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:18px;padding:15px 18px;font-weight:800;transition:.25s}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--green),var(--green-2));color:#fff;box-shadow:0 18px 42px rgba(0,138,61,.24)}
.btn.ghost{background:#fff;border:1px solid var(--line)}
.btn.dark{background:#0b1320;color:#fff}
.btn.w-full{width:100%}
.small-note{font-size:.9rem;color:var(--muted)}
.admin-shell{display:grid;grid-template-columns:320px 1fr;min-height:100vh;gap:24px;padding:20px}
.sidebar{border-radius:30px;padding:22px;display:flex;flex-direction:column;justify-content:space-between;position:sticky;top:20px;height:calc(100vh - 40px)}
.brand{display:flex;align-items:center;gap:14px;margin-bottom:24px}
.brand img{width:60px;height:60px;object-fit:contain}
.brand strong{display:block;font-size:1.04rem}
.brand span{color:var(--muted);font-size:.92rem}
.nav{display:grid;gap:8px}
.nav a,.stream-nav a{padding:14px 16px;border-radius:16px;color:#112033;font-weight:700}
.nav a:hover,.stream-nav a:hover{background:rgba(0,138,61,.08);color:var(--green)}
.sidebar-foot{display:grid;gap:14px}
.user-chip{display:flex;align-items:center;gap:12px;background:#fff;padding:12px;border-radius:18px;border:1px solid var(--line)}
.user-chip.no-bg{background:transparent;border:0;padding:0}
.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--green),#2de27d);color:#fff;font-weight:900}
.avatar.small{width:40px;height:40px}
.stack{display:grid}
.stack span,.user-chip span{font-size:.86rem;color:var(--muted)}
.main-content,.stream-main{padding:12px 10px 40px 0}
.page-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-end;margin:10px 0 18px}
.page-head h1{font-size:clamp(1.9rem,4vw,3rem);margin:0}
.page-head p{margin:8px 0 0;color:var(--muted)}
.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:20px 0}
.kpi{padding:22px;border-radius:24px;background:linear-gradient(180deg,#fff,rgba(255,255,255,.85));border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow)}
.kpi .label{margin:0;color:var(--muted);font-size:.92rem}
.kpi strong{display:block;font-size:2.2rem;margin:8px 0 6px}
.card{background:#fff;border-radius:28px;border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);padding:22px}
.card h3{margin:.2rem 0 1rem}
.grid-2{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}
.table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:#5d6b7d;background:#f8fbfd}
.badge{display:inline-flex;padding:7px 12px;border-radius:999px;font-size:.8rem;font-weight:800}
.badge.ok{background:rgba(0,184,83,.12);color:#07793a}
.badge.off{background:rgba(220,38,38,.1);color:#b91c1c}
.badge.warn{background:rgba(245,158,11,.15);color:#b45309}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.form-grid .full{grid-column:1/-1}
textarea.input{min-height:120px;resize:vertical}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.alert{padding:14px 16px;border-radius:18px;margin-bottom:14px;font-weight:700}
.alert.success{background:rgba(0,184,83,.1);color:#0d7b3d}
.alert.error{background:rgba(239,68,68,.1);color:#b91c1c}
.stream-shell{min-height:100vh}
.stream-header{position:sticky;top:0;z-index:40;display:flex;align-items:center;justify-content:space-between;padding:14px 22px;border-bottom:1px solid rgba(255,255,255,.6);backdrop-filter:blur(14px);background:rgba(250,252,254,.78)}
.stream-sidebar{position:fixed;left:0;top:74px;bottom:0;width:260px;padding:18px;transform:translateX(0);transition:.28s;z-index:39}
.stream-sidebar::before{content:"";position:absolute;inset:10px;background:rgba(255,255,255,.82);border:1px solid rgba(255,255,255,.7);box-shadow:var(--shadow);border-radius:28px;backdrop-filter:blur(16px);z-index:-1}
.stream-main{padding-left:290px}
.menu-toggle{display:none}
.hero-banner{position:relative;overflow:hidden;min-height:420px;border-radius:34px;padding:42px;background:
linear-gradient(110deg,rgba(7,14,25,.92) 0%, rgba(5,48,22,.58) 55%, rgba(255,255,255,.14) 100%),
url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80') center/cover}
.hero-banner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 20%, rgba(0,184,83,.2), transparent 20%)}
.hero-banner .content{position:relative;z-index:2;max-width:720px}
.hero-banner h1{font-size:clamp(2.5rem,5vw,4.8rem);line-height:.95;color:#fff;margin:14px 0}
.hero-banner p{max-width:640px;color:rgba(255,255,255,.82);font-size:1.05rem;line-height:1.75}
.hero-banner .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.hero-chip{display:inline-flex;align-items:center;padding:10px 14px;border-radius:999px;background:rgba(255,255,255,.12);color:#d9ffea;font-size:.86rem;font-weight:800;border:1px solid rgba(255,255,255,.18)}
.section-title{display:flex;align-items:end;justify-content:space-between;margin:28px 0 14px}
.section-title h2{margin:0;font-size:1.6rem}
.course-row{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(260px, 340px);overflow:auto;gap:16px;padding-bottom:12px;scrollbar-width:thin}
.course-card{position:relative;overflow:hidden;min-height:360px;border-radius:30px;background:#fff;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.8)}
.course-cover{height:180px;background:linear-gradient(135deg,rgba(9,16,24,.9),rgba(0,138,61,.8));position:relative}
.course-cover img{width:100%;height:100%;object-fit:cover;opacity:.7}
.course-body{padding:20px}
.course-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.course-progress{height:10px;background:#edf2f7;border-radius:999px;overflow:hidden}
.course-progress > span{display:block;height:100%;background:linear-gradient(135deg,var(--green),var(--green-2));border-radius:999px}
.viewer-layout{display:grid;grid-template-columns:320px 1fr;gap:18px;padding:18px}
.viewer-sidebar,.viewer-main{background:rgba(255,255,255,.84);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.8);box-shadow:var(--shadow);border-radius:28px}
.viewer-sidebar{padding:16px;position:sticky;top:92px;height:calc(100vh - 110px);overflow:auto}
.slide-list{display:grid;gap:10px}
.slide-item{padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line);cursor:pointer}
.slide-item.active{border-color:rgba(0,138,61,.28);background:linear-gradient(180deg,#fff,#f1fff6)}
.viewer-main{padding:22px;min-height:calc(100vh - 110px);position:relative;overflow:hidden}
.slide-stage{min-height:460px;border-radius:24px;padding:28px;background:linear-gradient(180deg,#fff,#f8fbfd);border:1px solid var(--line)}
.slide-title{font-size:2rem;margin:0 0 10px}
.slide-toolbar{display:flex;justify-content:space-between;gap:14px;align-items:center;margin-bottom:16px;flex-wrap:wrap}
.progress-ring{display:flex;gap:18px;flex-wrap:wrap}
.pill{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:800}
.big-stat{font-size:1.8rem;font-weight:900}
.overlay-quiz{position:absolute;inset:0;background:rgba(9,16,24,.66);backdrop-filter:blur(8px);display:none;align-items:center;justify-content:center;padding:20px;z-index:12}
.overlay-quiz.show{display:flex}
.quiz-card{width:min(720px,100%);background:#fff;border-radius:30px;padding:24px;box-shadow:0 30px 70px rgba(0,0,0,.25)}
.notes-fab,.ai-orb{position:fixed;right:24px;border:none;z-index:42}
.notes-fab{bottom:98px;width:62px;height:62px;border-radius:50%;background:#fff;box-shadow:var(--shadow);font-size:1.5rem}
.ai-orb{bottom:24px;width:72px;height:72px;border-radius:50%;background:radial-gradient(circle at 30% 30%, #4dff9c 0%, #0fa958 35%, #0a4f28 100%);box-shadow:0 18px 44px rgba(0,138,61,.34);animation:floaty 3s ease-in-out infinite}
.ai-orb::after{content:"";position:absolute;inset:-8px;border-radius:50%;border:1px solid rgba(0,184,83,.28);animation:pulse 2.4s infinite}
@keyframes pulse{0%{transform:scale(.9);opacity:.8}100%{transform:scale(1.28);opacity:0}}
@keyframes floaty{50%{transform:translateY(-6px)}}
.ai-panel{position:fixed;right:24px;bottom:110px;width:min(420px,calc(100vw - 30px));max-height:70vh;background:#fff;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);display:none;z-index:43;overflow:hidden}
.ai-panel.show{display:flex;flex-direction:column}
.ai-header{padding:16px 18px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;background:linear-gradient(135deg,rgba(0,138,61,.08),rgba(0,184,83,.03))}
.ai-messages{padding:14px;overflow:auto;display:grid;gap:12px;max-height:48vh}
.msg{padding:12px 14px;border-radius:16px;line-height:1.6}
.msg.user{background:#0b1320;color:#fff;margin-left:30px}
.msg.bot{background:#f4f8fb;border:1px solid var(--line);margin-right:30px}
.ai-form{display:flex;gap:10px;padding:14px;border-top:1px solid var(--line)}
.ai-form input{flex:1}
.note-panel{position:fixed;right:24px;top:110px;width:min(380px,calc(100vw - 24px));background:#fff;border-radius:28px;box-shadow:var(--shadow);border:1px solid var(--line);z-index:41;display:none;overflow:hidden}
.note-panel.show{display:block}
.note-panel .inner{padding:18px}
.note-item{padding:12px 0;border-bottom:1px solid var(--line)}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.feature-card{padding:22px;border-radius:26px;background:#fff;box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.8)}
.muted{color:var(--muted)}
hr.sep{border:0;height:1px;background:var(--line);margin:18px 0}
@media (max-width: 1100px){
  .auth-card,.grid-2,.viewer-layout{grid-template-columns:1fr}
  .form-grid,.kpi-grid,.feature-grid{grid-template-columns:1fr 1fr}
  .stream-main{padding-left:20px}
  .stream-sidebar{transform:translateX(-120%)}
  .stream-sidebar.show{transform:translateX(0)}
  .menu-toggle{display:inline-flex;border:0;background:#fff;border-radius:14px;padding:12px}
}
@media (max-width: 760px){
  .center-auth{padding:12px}
  .hero-panel{min-height:420px;padding:30px}
  .form-panel{padding:24px}
  .admin-shell{grid-template-columns:1fr;padding:12px}
  .sidebar{position:relative;top:0;height:auto}
  .main-content{padding:4px 0 24px}
  .page-head{flex-direction:column;align-items:flex-start}
  .kpi-grid,.feature-grid,.form-grid{grid-template-columns:1fr}
  .stream-header{padding:12px}
  .stream-main{padding:16px}
  .hero-banner{padding:24px;min-height:300px}
  .hero-banner h1{font-size:2.3rem}
  .course-row{grid-auto-columns:minmax(240px, 88vw)}
  .viewer-main,.viewer-sidebar{min-height:auto;height:auto;position:relative;top:0}
  .slide-title{font-size:1.55rem}
  .notes-fab,.ai-orb{right:14px}
  .note-panel,.ai-panel{right:10px}
}