:root{
  --bg:#0b0f18;
  --panel:#121722;
  --panel2:#0f1420;
  --text:#eaf0ff;
  --muted:#9fb0d0;
  --line:rgba(255,255,255,.10);
  --chip:rgba(255,255,255,.06);
  --shadow:0 16px 60px rgba(0,0,0,.55);

  --accent:#ff8a3d;
  --accent2:#7aa2ff;

  --ok:#66e3b4;
  --warn:#ffd166;

  --radius:22px;
  --radius2:28px;

  --sbw:78px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background:
    radial-gradient(1200px 700px at 20% 0%, rgba(255,138,61,.12), transparent 60%),
    radial-gradient(900px 600px at 90% 20%, rgba(122,162,255,.12), transparent 55%),
    radial-gradient(900px 600px at 40% 100%, rgba(102,227,180,.07), transparent 60%),
    var(--bg);
  color:var(--text);
}

a{color:inherit; text-decoration:none}
button{font-family:inherit}

.container{
  display:grid;
  grid-template-columns: var(--sbw) 1fr;
  min-height:100vh;
}

.sidebar{
  position:sticky;
  top:0;
  height:100vh;
  border-right:1px solid var(--line);
  background: rgba(10,12,18,.72);
  backdrop-filter: blur(14px);
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:16px 12px;
  gap:14px;
}

.brand{
  width:48px;height:48px;
  border-radius:18px;
  display:grid;place-items:center;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  box-shadow: var(--shadow);
  font-weight:900;
  letter-spacing:.2px;
}

.nav{
  width:100%;
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:6px;
}

.nav a{
  width:100%;
  padding:12px 10px;
  border-radius:18px;
  border:1px solid transparent;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:6px;
  color:var(--muted);
  transition:.18s ease;
  user-select:none;
}

.nav a .ico{font-size:18px}
.nav a .lbl{font-size:11px}

.nav a:hover{
  background:rgba(255,255,255,.03);
  border-color:var(--line);
  transform: translateY(-1px);
}

.nav a.active{
  color:var(--text);
  border-color: rgba(255,138,61,.45);
  background: rgba(255,138,61,.08);
}

.sbBottom{
  margin-top:auto;
  width:100%;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.avatar{
  width:46px;height:46px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  display:grid;place-items:center;
  color:var(--muted);
}

.main{
  padding:22px 18px 60px;
}

.topbar{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}

.h1{
  margin:0;
  font-size: clamp(22px, 2.8vw, 34px);
  letter-spacing:.2px;
}
.sub{
  margin:6px 0 0;
  color:var(--muted);
  font-size:14px;
  line-height:1.45;
  max-width: 70ch;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
  font-size:12px;
}

.btn{
  cursor:pointer;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  padding:10px 12px;
  border-radius:999px;
  font-size:13px;
  transition:.18s ease;
}
.btn:hover{transform:translateY(-1px); background:rgba(255,255,255,.05)}
.btn.primary{
  border-color: rgba(255,138,61,.45);
  background: rgba(255,138,61,.10);
}
.btn.ghost{color:var(--muted)}
.btn.danger{border-color: rgba(255,107,107,.35); background: rgba(255,107,107,.10)}

.grid{
  margin-top:16px;
  display:grid;
  grid-template-columns: 1.35fr .65fr;
  gap:16px;
}

@media (max-width: 1000px){
  .grid{grid-template-columns:1fr}
}

.card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius2);
  box-shadow: var(--shadow);
  overflow:hidden;
}

.cardHead{
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  background: rgba(255,255,255,.02);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}

.cardHead h2{
  margin:0;
  font-size:14px;
  letter-spacing:.2px;
}

.cardBody{padding:16px}

.search{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
}

.search input{
  width:100%;
  border:none;
  outline:none;
  background:transparent;
  color:var(--text);
  font-size:14px;
}

.seg{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

.badge{
  font-size:12px;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
}

.badge.easy{border-color: rgba(102,227,180,.25); color: var(--ok)}
.badge.medium{border-color: rgba(255,209,102,.25); color: var(--warn)}
.badge.hard{border-color: rgba(255,107,107,.25); color: #ff6b6b}

.progressWrap{
  display:flex;
  flex-direction:column;
  gap:10px;
}

.bar{
  width:100%;
  height:10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  overflow:hidden;
}
.fill{
  height:100%;
  width:0%;
  background: linear-gradient(90deg, rgba(255,138,61,.75), rgba(122,162,255,.55));
  transition: width .25s ease;
}

.table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  overflow:hidden;
}

.table th, .table td{
  padding:14px 14px;
  border-top:1px solid var(--line);
  vertical-align:middle;
  font-size:13px;
}

.table thead th{
  position:sticky;
  top:0;
  z-index:2;
  border-top:none;
  background: rgba(12,14,18,.92);
  backdrop-filter: blur(10px);
  color:var(--muted);
  font-weight:700;
  text-align:left;
}

.table tr:hover td{
  background: rgba(255,255,255,.02);
}

.check{
  width:18px;height:18px;
  accent-color: var(--accent);
}

.iconBtn{
  width:38px;height:38px;
  border-radius:14px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  display:grid;place-items:center;
  cursor:pointer;
  transition:.18s ease;
  color:var(--muted);
}
.iconBtn:hover{transform:translateY(-1px); background:rgba(255,255,255,.05); color:var(--text)}

.star.on{color: var(--accent)}
.noteBtn.on{color: var(--accent2)}

.kbd{
  font-size:11px;
  padding:5px 8px;
  border-radius:10px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
}

.toast{
  position:fixed;
  right:18px;
  bottom:18px;
  padding:12px 14px;
  border-radius:18px;
  border:1px solid var(--line);
  background: rgba(20,24,35,.92);
  box-shadow: var(--shadow);
  color:var(--muted);
  opacity:0;
  transform: translateY(12px);
  transition:.2s ease;
  z-index:9999;
  max-width:min(420px, 90vw);
}
.toast.show{opacity:1; transform: translateY(0)}
.toast.ok{border-color: rgba(102,227,180,.25); color: var(--ok)}
.toast.bad{border-color: rgba(255,107,107,.25); color: #ff6b6b}

/* Modal */
.modalBack{
  position:fixed;
  inset:0;
  background: rgba(0,0,0,.55);
  display:none;
  place-items:center;
  z-index:9998;
  padding:16px;
}
.modal{
  width:min(560px, 100%);
  border-radius: var(--radius2);
  border:1px solid var(--line);
  background: rgba(20,24,35,.95);
  box-shadow: var(--shadow);
  overflow:hidden;
}
.modalHead{
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
}
.modalHead h3{margin:0; font-size:14px}
.modalBody{padding:14px 16px; display:grid; gap:10px}
.modal textarea{
  width:100%;
  min-height:140px;
  resize:vertical;
  padding:12px 14px;
  border-radius:18px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  outline:none;
  font-size:13px;
  line-height:1.55;
}

/* =========================
   CONTACT SECTION (Settings)
   ========================= */

#contact.section-pad{
  padding: 0;
}

#contact .section-title{
  font-size: 18px;
  font-weight: 900;
  letter-spacing: .2px;
  margin: 0 0 14px 0;
  color: var(--text);
}

.contact-wrapper{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

.contact-info{
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
}

.contact-info h3{
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 900;
  color: var(--text);
}

.contact-info p{
  margin: 0 0 14px 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}

.info-item{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 10px;
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
  margin-bottom: 10px;
}

.info-item:last-child{
  margin-bottom: 0;
}

.info-item i,
.info-item svg{
  width: 18px;
  height: 18px;
  color: var(--muted);
  flex-shrink: 0;
}

.info-item a,
.info-item span{
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
}

.info-item a:hover{
  text-decoration: underline;
}

.contact-form{
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  display: grid;
  gap: 12px;
}

.form-group{
  display: grid;
  gap: 6px;
}

.form-group label{
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
}

.contact-form input,
.contact-form textarea{
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.25);
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: 0.2s ease;
}

.contact-form textarea{
  resize: none;
  min-height: 110px;
}

.contact-form input:focus,
.contact-form textarea:focus{
  border-color: rgba(120, 140, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(120, 140, 255, 0.15);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder{
  color: rgba(255,255,255,0.35);
}

.full-width{
  width: 100%;
}

/* Contact responsive */
@media (max-width: 900px){
  .contact-wrapper{
    grid-template-columns: 1fr;
  }
}

/* =========================
   MOBILE RESPONSIVE (GLOBAL)
   ========================= */
@media (max-width: 720px){

  .sidebar{
    display:none !important;
  }

  .container{
    display:block !important;
  }

  .main{
    padding:14px !important;
  }

  .topbar{
    flex-direction:column !important;
    align-items:flex-start !important;
    gap:12px !important;
  }

  .seg{
    flex-wrap:wrap !important;
    width:100%;
  }

  body{
    padding-bottom:90px;
  }
}