/* ==========================================================================
   Shkolo UI — our own dark style, Shkolo's structure
   ========================================================================== */

:root {
  --bg: #0b1220;
  --bg-2: #101a2c;
  --panel: #121a2b;
  --panel-2: #16203a;
  --line: #1f2a40;
  --line-strong: #2a3a56;
  --text: #e6edf7;
  --text-dim: #8ea0bb;
  --text-mute: #64748b;
  --accent: #2563eb;
  --accent-soft: #1d4ed8;
  --green: #6ee7a0;
  --blue: #7cc4ff;
  --yellow: #fcd34d;
  --red: #fca5a5;
  --radius: 12px;
  --sidebar-w: 226px;
  --topbar-h: 58px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.muted { color: var(--text-dim); }
.small { font-size: 12px; }

button { font: inherit; cursor: pointer; }

/* ---------- inputs ---------- */
input {
  width: 100%;
  padding: 11px 12px;
  border-radius: 9px;
  border: 1px solid var(--line-strong);
  background: #0d1524;
  color: var(--text);
  font-size: 14px;
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--text-mute); }
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .22);
}

.btn-primary {
  width: 100%;
  padding: 12px 16px;
  border: 0;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  letter-spacing: .4px;
  transition: background .15s, transform .05s;
}
.btn-primary:hover { background: var(--accent-soft); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: .55; cursor: default; }

.btn-ghost {
  padding: 8px 13px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: #c9d6ea;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
}
.btn-ghost:hover { background: #1b2740; border-color: #37507a; }

.icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: #c9d6ea;
  font-size: 14px;
}
.icon-btn:hover { background: #1b2740; }

/* ==========================================================================
   LOGIN
   ========================================================================== */
.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 16px;
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(37, 99, 235, .18), transparent 70%),
    var(--bg);
}

.login-box {
  width: 100%;
  max-width: 368px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 26px 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #cfe0f7;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .3px;
  margin-bottom: 24px;
}

.login-box label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--text-dim);
  margin: 0 0 6px;
}
.login-box input { margin-bottom: 16px; }

.password-wrap { position: relative; }
.password-wrap input { padding-right: 42px; }
.eye {
  position: absolute;
  right: 6px; top: 6px;
  width: 30px; height: 30px;
  border: 0; border-radius: 7px;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
}
.eye:hover { background: var(--panel-2); color: var(--text); }

.login-msg {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--text-dim);
  text-align: center;
  min-height: 18px;
}
.login-msg.err { color: var(--red); }
.login-msg.ok { color: var(--green); }

/* ==========================================================================
   APP SHELL
   ========================================================================== */
.app {
  min-height: 100vh;
  padding-top: var(--topbar-h);
  padding-left: var(--sidebar-w);
}

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 18px 0 calc(var(--sidebar-w) + 18px);
  background: rgba(13, 21, 36, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  z-index: 30;
}
.top-title { font-weight: 600; font-size: 15px; }
.top-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.user-chip {
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 4px 11px;
  background: var(--panel);
}

.sidebar {
  position: fixed;
  inset: var(--topbar-h) auto 0 0;
  width: var(--sidebar-w);
  background: var(--bg-2);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  z-index: 25;
}

.side-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 16px 18px 14px;
  color: #cfe0f7;
  font-weight: 700;
  letter-spacing: .3px;
  border-bottom: 1px solid var(--line);
}

.side-nav { padding: 12px 10px; display: flex; flex-direction: column; gap: 3px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 9px 12px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: #a8b8d2;
  font-size: 14px;
  font-weight: 500;
  text-align: left;
}
.nav-item .ico { width: 16px; text-align: center; opacity: .8; font-size: 12px; }
.nav-item:hover { background: var(--panel); color: var(--text); }
.nav-item.active { background: rgba(37, 99, 235, .18); color: #dbe8ff; box-shadow: inset 2px 0 0 var(--accent); }

.side-foot { padding: 12px 18px 16px; border-top: 1px solid var(--line); }

/* ---------- content ---------- */
.content { padding: 22px 24px 60px; max-width: 1180px; }

.view-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.view-head h2 { margin: 0; font-size: 19px; font-weight: 650; }
.head-tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.stat {
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 12px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.table-card { overflow: hidden; }

.filterbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 14px;
}
.filterbar input { width: 150px; margin: 0; padding: 8px 11px; font-size: 13px; }
.prefix {
  background: #0d1524;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  padding: 7px 9px;
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- grades ---------- */
.grades-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.grades-table th {
  text-align: left;
  padding: 11px 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: #93a6c4;
  background: #0f1826;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
}
.grades-table td { padding: 10px 12px; border-bottom: 1px solid #19233a; vertical-align: middle; }
.grades-table tbody tr:hover { background: var(--panel-2); }
.grades-table tbody tr:last-child td { border-bottom: 0; }
.grades-table .num { text-align: right; }
.grades-table .idx { color: var(--text-mute); font-size: 12.5px; width: 38px; }
.grades-table .subject { font-weight: 500; }
.empty { text-align: center; color: var(--text-dim); padding: 26px 12px !important; }

.pill {
  display: inline-block;
  min-width: 28px;
  text-align: center;
  padding: 3px 9px;
  margin: 2px 4px 2px 0;
  border-radius: 999px;
  font-weight: 700;
  font-size: 13px;
  background: #1b2740;
  color: #cfe0f7;
}
.pill.green  { background: #14351f; color: var(--green); }
.pill.blue   { background: #12263f; color: var(--blue); }
.pill.yellow { background: #3a300f; color: var(--yellow); }
.pill.red    { background: #3a1414; color: var(--red); }

/* ---------- schedule ---------- */
.week-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  align-items: start;
}

.day-col {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.day-col.today { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(37,99,235,.4); }

.day-head {
  padding: 10px 12px;
  background: #0f1826;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 7px;
}
.day-head .dn { font-weight: 650; font-size: 13.5px; }
.day-head .dd { color: var(--text-mute); font-size: 11.5px; }

.lesson {
  padding: 9px 12px;
  border-bottom: 1px solid #19233a;
  cursor: default;
}
.lesson:last-child { border-bottom: 0; }
.lesson:hover { background: var(--panel-2); }
.lesson .lnum { color: var(--text-mute); font-size: 11px; }
.lesson .lname { font-weight: 550; font-size: 13.5px; margin: 1px 0 3px; }
.lesson .lmeta { font-size: 11.5px; color: var(--text-dim); }
.lesson.free { opacity: .62; }
.lesson.free .lname { text-decoration: line-through; }

.gap {
  padding: 6px 12px;
  font-size: 11px;
  color: var(--text-mute);
  background: rgba(255,255,255,.015);
  border-bottom: 1px solid #19233a;
  font-style: italic;
}

/* ---------- frames ---------- */
.frame {
  width: 100%;
  height: 70vh;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fff;
}

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  background: #1b2740;
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: 0 12px 30px rgba(0,0,0,.4);
  z-index: 60;
}

/* ---------- mobile ---------- */
.only-mobile { display: none; }

@media (max-width: 860px) {
  :root { --sidebar-w: 0px; }
  .app { padding-left: 0; }
  .topbar { padding-left: 14px; }
  .only-mobile { display: grid; }
  .sidebar {
    width: 226px;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 0 0 40px rgba(0,0,0,.5);
  }
  .sidebar.open { transform: none; }
  .content { padding: 18px 14px 60px; }
  .filterbar input { width: 120px; }
}