/* =========================
   LexStud — Global Styles
   ========================= */

:root{
  --bg:#0f1320;
  --card:#161b2e;
  --text:#e9ecf3;
  --muted:#a6adbd;
  --accent:#6ea8fe;

  /* layout */
  --container:1100px;
  --radius:14px;
  --gap:12px;
  --shadow:0 10px 30px rgba(0,0,0,.40);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:linear-gradient(180deg,#0b0f1a,#0f1320);
  color:var(--text);
  font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--accent);text-decoration:none}

/* Container / box the whole site */
.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:16px;
}

/* =========================
   Header + Navigation
   ========================= */
header{
  position:relative;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:8px 0;
}

/* Brand */
.brand{display:flex;align-items:center;gap:10px}
.logo{
  width:34px;height:34px;border-radius:10px;
  background:radial-gradient(circle at 30% 30%, #6ea8fe, #5d6bff 60%, #2a2e6a);
  box-shadow:0 0 20px #2a2e6a66;
}
.brand-link{display:flex;align-items:center;gap:8px;color:inherit}
.brand-link:hover strong{text-decoration:underline}
.header-right{position:relative;display:flex;align-items:center;gap:10px}

/* Desktop nav baseline (nav in header) */
#mainNav{display:flex;flex-wrap:wrap;gap:12px}
#mainNav a{opacity:.9;font-size:14px}

/* Burger button */
.menu-toggle{
  display:none; /* visible on mobile via media query */
  cursor:pointer;
  padding:6px 10px;
  border:1px solid #2a3154;
  border-radius:8px;
  background:#141a2d;
  color:var(--text);
  font-size:18px;
  line-height:1;
  position:relative;
  z-index:20; /* above dropdown */
}

/* Mobile dropdown behavior */
@media (max-width:640px){
  /* Hide desktop layout, use dropdown */
  #mainNav{
    position:absolute;
    right:0;
    top:calc(100% + 8px);
    display:none;         /* hidden by default */
    flex-direction:column;
    gap:0;
    min-width:180px;
    background:#141a2d;
    border:1px solid #2a3154;
    border-radius:12px;
    box-shadow:var(--shadow);
    overflow:hidden;
    z-index:10;
  }
  #mainNav.open{display:flex} /* JS toggles this */

  #mainNav a{
    display:block;
    padding:12px 14px;
    border-bottom:1px solid #222a47;
    font-size:15px;
  }
  #mainNav a:last-child{border-bottom:none}

  .menu-toggle{display:inline-block}
}

/* Desktop: always show inline nav, hide burger */
@media (min-width:641px){
  #mainNav{position:static;display:flex !important;background:transparent;border:0;border-radius:0;box-shadow:none;min-width:0}
  #mainNav a{padding:0;border:0}
  .menu-toggle{display:none}
}

/* =========================
   Typography & UI atoms
   ========================= */
h1{
  margin:12px 0 6px;
  font-size:clamp(22px,5vw,36px);
  line-height:1.2;
}
h2{margin:8px 0 6px;font-size:22px}
h3{margin:8px 0 6px;font-size:18px}

.muted{color:var(--muted)}
.muted.small{font-size:12px}
.strong{font-weight:600}

.pill{
  display:inline-block;
  padding:5px 10px;
  border:1px solid #2a3154;
  border-radius:999px;
  color:var(--muted);
  font-size:12px;
}

.btn{
  display:inline-block;
  background:#2a3566;
  border:1px solid #3a4785;
  padding:10px 14px;
  border-radius:10px;
  color:#fff;
  font-weight:600;
  margin-top:8px;
  cursor:pointer;
}
.btn:hover{filter:brightness(1.05)}

/* Cards */
.card{
  background:var(--card);
  border:1px solid #242a45;
  border-radius:var(--radius);
  padding:18px;
}

/* Reusable list-tile (languages, quick actions) */
.lang{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px;
  border:1px solid #263055;
  border-radius:12px;
  background:#141a2d;
}

/* KPIs row */
.kpi{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}
.kpi .box{
  flex:1 1 100px;
  background:#141a2d;
  border:1px solid #263055;
  padding:10px 12px;
  border-radius:12px;
}

/* =========================
   Layout helpers / Grids
   ========================= */

/* Hero split: stacks on mobile, two cols on wider screens */
.hero{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:start;
  padding:20px 0;
}
@media (min-width:700px){
  .hero{grid-template-columns:1.1fr .9fr;padding:40px 0}
}

/* Generic grid with --cols helper */
.grid{
  display:grid;
  gap:var(--gap);
  margin-top:12px;
  grid-template-columns:repeat(var(--cols, auto-fit), minmax(220px, 1fr));
}
.cols-1{--cols:1}
.cols-2{--cols:2}
.cols-3{--cols:3}
.cols-4{--cols:4}
/* collapse fixed counts on small screens */
@media (max-width:860px){ .cols-2{--cols:1} }
@media (max-width:640px){ .cols-3, .cols-4{--cols:1} }

/* =========================
   Forms
   ========================= */
form.card{display:block;padding:16px;border-radius:var(--radius)}
form.card h3{margin:0 0 12px}
label{display:block;font-weight:600;margin:10px 0 6px}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select{
  width:100%;
  padding:10px 12px;
  border:1px solid #2a3154;
  border-radius:10px;
  background:#0f1326;
  color:var(--text);
  outline:none;
}
input:focus, select:focus{
  border-color:#3a4785;
  box-shadow:0 0 0 3px rgba(110,168,254,.15);
}
form .actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}

/* Auth layout */
.auth-wrap{display:grid;gap:20px;margin-top:16px}
@media (min-width:860px){ .auth-wrap{grid-template-columns:1fr 1fr} }
.auth-card{background:var(--card);border:1px solid #242a45;border-radius:var(--radius);padding:18px}

/* Alerts */
.help{color:var(--muted);font-size:12px;margin-top:4px}
.alert{
  background:#1a1420;border:1px solid #5b2644;color:#ffd5e4;
  padding:10px 12px;border-radius:10px;margin:10px 0;
}
.success{
  background:#0f1a12;border:1px solid #1f6d42;color:#c9f3db;
}

/* Tables */
.stats-table{width:100%;border-collapse:collapse;margin-top:1rem}
.stats-table th,
.stats-table td{
  padding:8px 12px;
  border-bottom:1px solid rgba(255,255,255,0.1);
  text-align:center;
}
.stats-table th{font-weight:600;background:rgba(255,255,255,0.05)}
.stats-table td{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial}

.motto {
  color: #6995fe;
}


/* =========================
   Footer
   ========================= */
footer{opacity:.7;padding:24px 0;text-align:center;font-size:13px}