:root{
  --bg:#06111f;
  --panel:#0d2036;
  --panel-2:#102b46;
  --text:#eef8ff;
  --muted:#a9c2d8;
  --cyan:#3ee7ff;
  --blue:#4d7cff;
  --green:#3ee6a8;
  --yellow:#ffd166;
  --danger:#ff6577;
  --border:rgba(129,211,255,.22);
  --shadow:0 18px 50px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,Segoe UI,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 10% 20%,rgba(62,231,255,.10),transparent 28%),
    radial-gradient(circle at 90% 10%,rgba(77,124,255,.14),transparent 30%),
    linear-gradient(145deg,#030912,#071726 55%,#07111e);
}
a{color:inherit}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.center{text-align:center}
.container{width:min(1180px,92%);margin:auto}
.page{padding:105px 0 55px}
.section{margin:26px 0}
.section-title{
  font-size:clamp(1.45rem,3vw,2.1rem);
  margin:0 0 8px;
}
.section-subtitle{margin:0;color:var(--muted);line-height:1.6}
.topbar{
  position:fixed;inset:0 0 auto 0;z-index:50;
  background:rgba(3,10,18,.78);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.nav{
  min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:900;letter-spacing:.5px}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--cyan),var(--blue));color:#04101b;
  box-shadow:0 0 26px rgba(62,231,255,.35);font-size:1.35rem;
}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.nav-links a,.nav-btn{
  text-decoration:none;color:var(--muted);padding:9px 12px;border-radius:10px;
  border:0;background:transparent;
}
.nav-links a:hover,.nav-links a.active,.nav-btn:hover{color:white;background:rgba(255,255,255,.07)}
.menu-btn{display:none;border:1px solid var(--border);background:var(--panel);color:white;border-radius:10px;padding:9px 12px}
.hero{
  min-height:100vh;display:grid;place-items:center;position:relative;overflow:hidden;padding:40px 0;
}
.circuit-bg{position:absolute;inset:0;overflow:hidden;pointer-events:none}
.circuit-line{
  position:absolute;height:2px;width:48vw;opacity:.45;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  animation:flow 6s linear infinite;
  filter:drop-shadow(0 0 7px var(--cyan));
}
.circuit-line:nth-child(1){top:18%;left:-20%;transform:rotate(10deg);animation-delay:-1s}
.circuit-line:nth-child(2){top:42%;right:-20%;transform:rotate(-13deg);animation-delay:-3s}
.circuit-line:nth-child(3){top:70%;left:-12%;transform:rotate(5deg);animation-delay:-5s}
.circuit-node{
  position:absolute;width:13px;height:13px;border:2px solid var(--cyan);
  border-radius:50%;box-shadow:0 0 18px var(--cyan);animation:pulse 2.2s ease-in-out infinite;
}
.circuit-node.n1{top:20%;left:20%}.circuit-node.n2{top:42%;right:25%;animation-delay:-.8s}
.circuit-node.n3{bottom:20%;left:32%;animation-delay:-1.4s}.circuit-node.n4{bottom:28%;right:13%;animation-delay:-.4s}
@keyframes flow{0%{translate:-15% 0}50%{translate:15% 0}100%{translate:-15% 0}}
@keyframes pulse{50%{transform:scale(1.7);opacity:.35}}
.login-wrap{position:relative;z-index:2;width:min(470px,92%)}
.login-card,.card{
  background:linear-gradient(155deg,rgba(16,43,70,.92),rgba(8,25,42,.94));
  border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);
}
.login-card{padding:32px}
.login-title{text-align:center;font-size:clamp(2.3rem,8vw,4.2rem);margin:5px 0 0;letter-spacing:2px}
.login-tag{text-align:center;color:var(--muted);margin:8px 0 28px}
.form-group{margin:15px 0}
label{display:block;font-weight:700;margin:0 0 8px}
.input-wrap{position:relative}
input,textarea,select{
  width:100%;border:1px solid var(--border);border-radius:13px;
  background:rgba(1,8,15,.55);color:white;padding:13px 14px;outline:none;
}
input:focus,textarea:focus,select:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(62,231,255,.10)}
textarea{min-height:100px;resize:vertical}
.eye{
  position:absolute;right:9px;top:50%;transform:translateY(-50%);
  background:transparent;border:0;color:var(--muted);padding:7px;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:13px;padding:12px 16px;font-weight:800;text-decoration:none;
  background:linear-gradient(135deg,var(--cyan),var(--blue));color:#03111d;
  box-shadow:0 10px 24px rgba(57,153,255,.22);
}
.btn:hover{transform:translateY(-1px);filter:brightness(1.07)}
.btn.secondary{background:rgba(255,255,255,.08);color:white;border:1px solid var(--border);box-shadow:none}
.btn.danger{background:linear-gradient(135deg,#ff8a9a,var(--danger));color:#20040a}
.btn.full{width:100%}
.error{color:#ff9dab;min-height:20px;margin:9px 0 0;text-align:center}
.welcome{
  padding:30px;border-radius:24px;border:1px solid var(--border);
  background:linear-gradient(130deg,rgba(62,231,255,.10),rgba(77,124,255,.12));
  display:flex;justify-content:space-between;align-items:center;gap:25px;flex-wrap:wrap;
}
.welcome h1{margin:0;font-size:clamp(1.9rem,4vw,3rem)}
.welcome p{color:var(--muted);margin:7px 0 0}
.countdown{
  min-width:235px;text-align:center;background:rgba(0,0,0,.22);
  border:1px solid var(--border);border-radius:18px;padding:16px;
}
.countdown strong{font-size:2.2rem;color:var(--cyan);display:block}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:24px}
.quick-circle{
  aspect-ratio:1;border-radius:50%;display:grid;place-items:center;text-align:center;
  text-decoration:none;border:1px solid var(--border);position:relative;overflow:hidden;
  background:linear-gradient(145deg,rgba(19,63,92,.95),rgba(7,23,39,.95));
  box-shadow:var(--shadow);transition:.25s;
}
.quick-circle::before{
  content:"";position:absolute;inset:8%;border-radius:50%;
  border:1px dashed rgba(62,231,255,.38);animation:spin 16s linear infinite;
}
.quick-circle:hover{transform:translateY(-7px) scale(1.02);border-color:var(--cyan)}
.quick-circle .inside{position:relative;z-index:2}
.quick-circle b{font-size:clamp(1.2rem,3vw,2rem);display:block}
.quick-circle span{font-size:.85rem;color:var(--muted)}
@keyframes spin{to{transform:rotate(360deg)}}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{padding:22px}
.card h3{margin:0 0 8px}
.card p{color:var(--muted);line-height:1.6}
.stat-row{display:flex;justify-content:space-between;gap:15px;align-items:center;margin:16px 0}
.progress{
  height:14px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;border:1px solid var(--border)
}
.progress-fill{height:100%;width:0;background:linear-gradient(90deg,var(--cyan),var(--green));border-radius:inherit;transition:.4s}
.range-line{display:grid;grid-template-columns:75px 1fr 48px;gap:10px;align-items:center;margin:15px 0}
input[type="range"]{padding:0;border:0;background:transparent;accent-color:var(--cyan)}
.tools{display:flex;gap:10px;flex-wrap:wrap}
.alarm-status{
  margin-top:12px;padding:12px;border-radius:12px;background:rgba(62,231,255,.08);
  color:var(--muted);border:1px solid var(--border);
}
.task-list{display:grid;gap:10px;margin-top:15px}
.task{
  display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  padding:13px;border-radius:13px;background:rgba(255,255,255,.05);border:1px solid var(--border)
}
.task.done .task-text{text-decoration:line-through;opacity:.55}
.task-actions{display:flex;gap:7px}
.icon-btn{border:1px solid var(--border);background:rgba(255,255,255,.06);color:white;border-radius:9px;padding:6px 9px}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0}
.filters button{border:1px solid var(--border);background:rgba(255,255,255,.05);color:var(--muted);padding:9px 12px;border-radius:999px}
.filters button.active{background:var(--cyan);color:#03111d}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.info-card{
  padding:20px;border-radius:18px;background:linear-gradient(145deg,rgba(16,43,70,.9),rgba(8,24,39,.9));
  border:1px solid var(--border);display:flex;flex-direction:column;min-height:245px;
}
.info-card .tag{align-self:flex-start;background:rgba(62,231,255,.12);color:var(--cyan);padding:6px 9px;border-radius:999px;font-size:.78rem;font-weight:800}
.info-card h3{margin:14px 0 8px}
.info-card p{color:var(--muted);line-height:1.55;flex:1}
.info-card ul{padding-left:18px;color:var(--muted);line-height:1.65}
.link-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.link-btn{
  display:inline-flex;padding:9px 11px;border-radius:10px;text-decoration:none;
  border:1px solid var(--border);background:rgba(255,255,255,.06);font-size:.88rem
}
.link-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.subject-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.subject{padding:12px;border-radius:12px;background:rgba(255,255,255,.05);border:1px solid var(--border)}
.resource-form{display:grid;grid-template-columns:1fr 1fr auto;gap:10px}
.resource-list{display:grid;gap:10px;margin-top:16px}
.resource-item{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:13px;border:1px solid var(--border);border-radius:13px;background:rgba(255,255,255,.05)}
.notice{border-left:4px solid var(--yellow);padding:14px 16px;border-radius:10px;background:rgba(255,209,102,.08);color:#ffe8ac}
.footer{padding:25px 0 40px;color:var(--muted);text-align:center;border-top:1px solid var(--border);margin-top:40px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 9px;border-radius:999px;background:rgba(62,230,168,.12);color:var(--green);font-size:.8rem;font-weight:800}
@media(max-width:900px){
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .info-grid,.grid-3{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
  .menu-btn{display:block}
  .nav-links{
    display:none;position:absolute;left:4%;right:4%;top:68px;padding:12px;
    background:#081827;border:1px solid var(--border);border-radius:15px;box-shadow:var(--shadow)
  }
  .nav-links.open{display:grid}
  .grid-2,.info-grid,.grid-3{grid-template-columns:1fr}
  .quick-grid{gap:12px}
  .resource-form{grid-template-columns:1fr}
  .subject-list{grid-template-columns:1fr}
  .page{padding-top:92px}
}