@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700&family=Instrument+Sans:ital,wght@0,400;0,500;0,600;1,400&display=swap');

* { box-sizing: border-box; margin: 0; padding: 0; }

/* ===== DARK THEME (default) ===== */
:root {
  --bg0: #0b0e14;
  --bg1: #13171f;
  --bg2: #1a1f2a;
  --bg3: #222838;
  --accent:  #5b8df6;
  --accent2: #3dd68c;
  --accent3: #f0614a;
  --accent4: #f5a623;
  --txt0: #dde3f0;
  --txt1: #8a94ad;
  --txt2: #4a5270;
  --border:  #222838;
  --border2: #2e364d;
  --pass: #3dd68c;
  --fail: #f0614a;
  --rad:  8px;
  --rad2: 12px;
  --rad3: 18px;
  --ff: 'Instrument Sans', sans-serif;
  --fh: 'Syne', sans-serif;
  --fm: 'DM Mono', monospace;
}

/* ===== LIGHT THEME ===== */
.lm {
  --bg0: #eef0f6;
  --bg1: #ffffff;
  --bg2: #f4f5fb;
  --bg3: #e8eaf5;
  --accent:  #3a6ae8;
  --accent2: #1ab87a;
  --accent3: #e0402a;
  --accent4: #d48f10;
  --txt0: #141824;
  --txt1: #50597a;
  --txt2: #9098b8;
  --border:  #dde0ee;
  --border2: #c5cade;
  --pass: #1ab87a;
  --fail: #e0402a;
}

/* ===== BASE ===== */
body {
  font-family: var(--ff);
  background: var(--bg0);
  color: var(--txt0);
  font-size: 14px;
  min-height: 100vh;
  transition: background .3s, color .3s;
}

/* ===== APP SHELL ===== */
.app { display: flex; flex-direction: column; min-height: 600px; }

/* ===== TOP BAR ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--fh);
  font-weight: 700;
  font-size: 15px;
  color: var(--txt0);
  letter-spacing: -.3px;
}
.logo-mark {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
}
.nav-wrap { display: flex; align-items: center; gap: 8px; }
.nav-tabs {
  display: flex; gap: 2px;
  background: var(--bg2);
  border-radius: var(--rad2);
  padding: 3px;
  border: 1px solid var(--border);
}
.tab {
  padding: 7px 14px;
  border: none; background: none;
  color: var(--txt1);
  cursor: pointer;
  font-family: var(--ff); font-size: 13px;
  border-radius: 9px;
  transition: all .2s;
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 500; white-space: nowrap;
}
.tab.active { background: var(--bg1); color: var(--txt0); box-shadow: 0 1px 6px rgba(0,0,0,.18); }
.tab:hover:not(.active) { color: var(--txt0); }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 34px; height: 34px;
  border: 1px solid var(--border2);
  background: var(--bg2);
  color: var(--txt1);
  border-radius: 9px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; transition: all .2s; flex-shrink: 0;
}
.icon-btn:hover { background: var(--bg3); color: var(--txt0); }

/* ===== MAIN / SECTIONS ===== */
.main { padding: 18px 20px; flex: 1; }
.section { display: none; animation: fadeUp .22s ease; }
.section.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== KPI CARDS ===== */
.dash-kpi { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-bottom: 18px; }
.kpi {
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--rad2);
  padding: 16px 18px;
  position: relative; overflow: hidden;
  transition: border-color .2s, transform .2s;
}
.kpi:hover { border-color: var(--border2); transform: translateY(-1px); }
.kpi-accent { position: absolute; top: 0; left: 0; height: 3px; border-radius: 0; }
.kpi-lbl {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--txt2); margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}
.kpi-val { font-size: 32px; font-weight: 700; font-family: var(--fh); line-height: 1; color: var(--txt0); }
.kpi-sub { font-size: 11px; color: var(--txt2); margin-top: 5px; }

/* ===== GENERIC CARD ===== */
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.card {
  background: var(--bg1);
  border: 1px solid var(--border);
  border-radius: var(--rad2);
  padding: 16px;
}
.card-hd { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-title { font-family: var(--fh); font-size: 14px; font-weight: 600; color: var(--txt0); display: flex; align-items: center; gap: 7px; }

/* ===== BUTTONS ===== */
.btn {
  padding: 8px 13px; border: none; border-radius: var(--rad);
  cursor: pointer; font-family: var(--ff); font-size: 13px; font-weight: 500;
  transition: all .18s;
  display: inline-flex; align-items: center; gap: 6px; line-height: 1;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.12); }
.btn-ok { background: var(--accent2); color: #fff; }
.btn-ok:hover { filter: brightness(1.1); }
.btn-danger { background: var(--accent3); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); }
.btn-ghost { background: var(--bg2); color: var(--txt0); border: 1px solid var(--border2); }
.btn-ghost:hover { background: var(--bg3); }
.btn-sm { padding: 5px 9px; font-size: 12px; border-radius: 6px; }
.btn-icon { width: 28px; height: 28px; padding: 0; justify-content: center; border-radius: 7px; }

/* ===== INPUTS ===== */
.search-row { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.inp {
  padding: 8px 11px;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--txt0);
  border-radius: var(--rad);
  font-family: var(--ff); font-size: 13px;
  outline: none;
  transition: border .2s, box-shadow .2s;
}
.inp:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(91,141,246,.12); }
.inp::placeholder { color: var(--txt2); }
.inp-grow { flex: 1; min-width: 140px; }
select.inp { cursor: pointer; }

/* ===== STUDENT GRID ===== */
.sg { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px,1fr)); gap: 10px; }
.sc {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--rad2);
  padding: 13px; cursor: pointer;
  transition: all .2s; position: relative;
}
.sc:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.sc-actions { position: absolute; top: 9px; right: 9px; display: flex; gap: 4px; opacity: 0; transition: opacity .18s; }
.sc:hover .sc-actions { opacity: 1; }
.sc-top { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }

/* ===== AVATARS ===== */
.avatar { border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; flex-shrink: 0; }
.av-lg { width: 48px; height: 48px; font-size: 16px; }
.av-sm { width: 34px; height: 34px; font-size: 12px; }
.av-xs { width: 28px; height: 28px; font-size: 10px; }

.sc-name { font-weight: 600; font-size: 13px; font-family: var(--fh); }
.sc-id { font-size: 11px; color: var(--txt2); font-family: var(--fm); margin-top: 1px; }

/* ===== PILLS ===== */
.pill { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 500; }
.pill-major { background: var(--bg1); border: 1px solid var(--border2); color: var(--txt1); margin-top: 4px; }
.pill-pass  { background: rgba(61,214,140,.1); color: var(--pass); border: 1px solid rgba(61,214,140,.2); }
.pill-fail  { background: rgba(240,97,74,.1);  color: var(--fail); border: 1px solid rgba(240,97,74,.2); }
.pill-neutral { background: var(--bg3); color: var(--txt2); border: 1px solid var(--border2); }

.sc-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 10px; }
.sc-mi { background: var(--bg1); border-radius: 7px; padding: 6px 8px; text-align: center; }
.sc-mv { font-size: 15px; font-weight: 700; font-family: var(--fh); }
.sc-ml { font-size: 9px; color: var(--txt2); text-transform: uppercase; letter-spacing: .6px; margin-top: 1px; }

/* ===== EMPTY STATE ===== */
.empty { text-align: center; padding: 40px 20px; color: var(--txt2); }
.empty i { font-size: 32px; display: block; margin-bottom: 8px; opacity: .3; }

/* ===== MODAL ===== */
.modal-bg {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.55); z-index: 200;
  align-items: center; justify-content: center;
}
.modal-bg.open { display: flex; }
.modal {
  background: var(--bg1);
  border: 1px solid var(--border2);
  border-radius: var(--rad3);
  padding: 22px; width: 100%; max-width: 450px;
  max-height: 85vh; overflow-y: auto;
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
.modal-title { font-family: var(--fh); font-size: 16px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.fg { margin-bottom: 11px; }
.fl { display: block; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .7px; color: var(--txt2); margin-bottom: 4px; }
.fgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.modal-ft { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }

/* ===== CONFIRM DIALOG ===== */
.confirm-bg {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.6); z-index: 300;
  align-items: center; justify-content: center;
}
.confirm-bg.open { display: flex; }
.confirm-box {
  background: var(--bg1);
  border: 1px solid var(--border2);
  border-radius: var(--rad2);
  padding: 24px; width: 100%; max-width: 380px;
  box-shadow: 0 24px 60px rgba(0,0,0,.4);
}
.confirm-icon {
  width: 48px; height: 48px; border-radius: 50%;
  background: rgba(240,97,74,.12); border: 1px solid rgba(240,97,74,.25);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; color: var(--fail); font-size: 22px;
}
.confirm-title { font-family: var(--fh); font-size: 16px; font-weight: 700; text-align: center; margin-bottom: 8px; }
.confirm-msg { font-size: 13px; color: var(--txt1); text-align: center; margin-bottom: 20px; line-height: 1.6; }
.confirm-ft { display: flex; gap: 8px; justify-content: center; }

/* ===== ATTENDANCE ===== */
.att-config { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; font-size: 12px; }
.att-config label { font-size: 11px; color: var(--txt2); font-weight: 600; text-transform: uppercase; letter-spacing: .6px; }
.att-period-inp { width: 72px; padding: 4px 8px; border-radius: 6px; font-size: 12px; }
.att-stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-bottom: 10px; }
.ast { background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; padding: 8px; text-align: center; }
.asv { font-size: 18px; font-weight: 700; font-family: var(--fh); }
.asl { font-size: 9px; color: var(--txt2); text-transform: uppercase; letter-spacing: .6px; margin-top: 1px; }
.att-legend { display: flex; gap: 14px; font-size: 11px; color: var(--txt1); margin-bottom: 6px; flex-wrap: wrap; }
.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; margin-right: 4px; }
.att-day-names { display: grid; grid-template-columns: repeat(7,1fr); gap: 3px; margin-bottom: 3px; }
.adn { font-size: 9px; color: var(--txt2); text-align: center; }
.att-grid { display: grid; grid-template-columns: repeat(7,1fr); gap: 3px; }
.aday {
  aspect-ratio: 1; border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-weight: 600; cursor: pointer;
  transition: all .13s;
  border: 1px solid var(--border);
  color: var(--txt2); background: var(--bg2);
  font-family: var(--fm);
}
.aday.present { background: rgba(61,214,140,.14); color: var(--pass); border-color: rgba(61,214,140,.28); }
.aday.absent  { background: rgba(240,97,74,.14);  color: var(--fail); border-color: rgba(240,97,74,.28); }
.aday:hover, .aday:focus { transform: scale(1.12); border-color: var(--accent); outline: none; }

/* ===== PROFILE LAYOUT ===== */
.plo { display: grid; grid-template-columns: 280px 1fr; gap: 14px; }
.psb { display: flex; flex-direction: column; gap: 12px; }
.pph { background: var(--bg1); border: 1px solid var(--border); border-radius: var(--rad2); padding: 18px; text-align: center; }
.pname { font-family: var(--fh); font-size: 17px; font-weight: 700; margin-bottom: 2px; }
.pid { font-size: 11px; color: var(--txt2); font-family: var(--fm); margin-bottom: 8px; }
.gpa-hero { font-size: 44px; font-weight: 700; font-family: var(--fh); line-height: 1; padding: 8px 0; }
.pbar { height: 5px; background: var(--bg3); border-radius: 3px; overflow: hidden; margin-top: 5px; }
.pbf { height: 100%; border-radius: 3px; transition: width .5s ease; }
.pm { display: flex; flex-direction: column; gap: 12px; }

/* ===== PROFILE INFO TABLE ===== */
.info-table { width: 100%; border-collapse: collapse; }
.info-table td { padding: 7px 0; font-size: 12px; border-bottom: 1px solid var(--border); }
.info-table tr:last-child td { border-bottom: none; }
.info-table .ik { color: var(--txt2); }
.info-table .iv { text-align: right; font-weight: 500; color: var(--txt0); }

/* ===== DATA TABLE ===== */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th { font-size: 10px; text-transform: uppercase; letter-spacing: .7px; color: var(--txt2); padding: 5px 8px; border-bottom: 1px solid var(--border); text-align: left; font-weight: 600; }
.tbl td { padding: 8px 8px; border-bottom: 1px solid var(--border); font-size: 13px; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: var(--bg2); }
.gbadge { padding: 2px 7px; border-radius: 5px; font-size: 11px; font-weight: 700; font-family: var(--fm); }

/* ===== ADD COURSE ROW ===== */
.acr { display: grid; grid-template-columns: 1fr 100px 80px auto; gap: 6px; align-items: end; margin-bottom: 8px; }

/* ===== BAR CHART ===== */
.bar-chart { display: flex; flex-direction: column; gap: 5px; }
.bar-row { display: flex; align-items: center; gap: 8px; }
.bar-lbl { font-size: 11px; color: var(--txt1); width: 86px; flex-shrink: 0; text-align: right; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { flex: 1; height: 16px; background: var(--bg3); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 4px; transition: width .5s ease; display: flex; align-items: center; padding-right: 5px; justify-content: flex-end; font-size: 9px; font-weight: 700; color: rgba(255,255,255,.85); min-width: 26px; }

/* ===== STATUS ROWS ===== */
.status-rows .sr { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.status-rows .sr:last-child { border-bottom: none; }
.status-rows .sv { font-size: 22px; font-weight: 700; font-family: var(--fh); }

/* ===== TOP STUDENTS ===== */
.top-row { display: flex; align-items: center; gap: 9px; padding: 7px 0; border-bottom: 1px solid var(--border); }
.top-row:last-child { border-bottom: none; }
.tr-rank { font-size: 11px; font-weight: 700; color: var(--txt2); width: 20px; font-family: var(--fh); }
.tr-info { flex: 1; }
.tr-name { font-size: 13px; font-weight: 600; font-family: var(--fh); }
.tr-sub  { font-size: 11px; color: var(--txt2); }
.tr-gpa  { font-size: 20px; font-weight: 700; font-family: var(--fh); }

/* ===== BACK BUTTON ===== */
.back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--txt1); font-size: 13px; cursor: pointer;
  padding: 6px 0; margin-bottom: 14px;
  background: none; border: none;
  font-family: var(--ff); transition: color .18s; font-weight: 500;
}
.back-btn:hover { color: var(--txt0); }

/* ===== TOAST ===== */
.toast {
  position: fixed; bottom: 18px; right: 18px;
  background: var(--bg1); border: 1px solid var(--border2);
  border-radius: var(--rad); padding: 11px 15px;
  font-size: 13px; color: var(--txt0);
  box-shadow: 0 10px 28px rgba(0,0,0,.25);
  z-index: 999; transform: translateY(70px); opacity: 0;
  transition: all .28s; max-width: 260px;
  display: flex; align-items: center; gap: 8px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast-ok  { border-left: 3px solid var(--pass); }
.toast-err { border-left: 3px solid var(--fail); }

/* ===== MISC ===== */
.no-results { grid-column: 1/-1; padding: 40px; text-align: center; color: var(--txt2); }
.sr-only { position: absolute; width: 1px; height: 1px; clip: rect(0,0,0,0); overflow: hidden; }