:root {
  --bg: #0b1220;
  --bg-2: #111c30;
  --card: #16233b;
  --card-2: #1c2c48;
  --line: #24365a;
  --text: #eaf0fb;
  --muted: #9fb0cc;
  --accent: #4f8cff;
  --accent-2: #6aa2ff;
  --overdue: #ff6b6b;
  --soon: #ffb454;
  --ok: #37d399;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #16233b 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.screen { max-width: 760px; margin: 0 auto; padding: 20px 16px 60px; }

/* ---------- Connect ---------- */
#connect { display: flex; min-height: 100vh; align-items: center; }
.connect-card {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 { font-size: 1.5rem; margin: 0; letter-spacing: -.02em; }
.brand-mark { font-size: 1.6rem; }
.brand.small { font-weight: 600; font-size: 1.05rem; gap: 8px; }
.tagline { color: var(--muted); margin: 8px 0 22px; }

form label { display: block; font-weight: 600; margin: 16px 0 6px; font-size: .92rem; }
form input[type=text], form input[type=password] {
  width: 100%; padding: 12px 14px; font-size: 1rem;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px;
  color: var(--text); outline: none;
}
form input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,140,255,.18); }
.hint { color: var(--muted); font-size: .82rem; margin: 6px 0 0; }

.how { margin: 14px 0 4px; }
.how summary { cursor: pointer; color: var(--accent-2); font-size: .9rem; }
.how ol { color: var(--muted); font-size: .88rem; line-height: 1.6; margin: 10px 0 0; padding-left: 20px; }

.remember { display: flex; align-items: center; gap: 8px; font-weight: 500 !important; margin-top: 18px; }
.remember input { width: auto; }

button {
  cursor: pointer; font-family: inherit;
}
#connect-btn {
  width: 100%; margin-top: 20px; padding: 13px; font-size: 1.05rem; font-weight: 600;
  color: #fff; background: linear-gradient(180deg, var(--accent-2), var(--accent));
  border: none; border-radius: 10px;
}
#connect-btn:hover { filter: brightness(1.06); }
#connect-btn:disabled { opacity: .6; cursor: default; }

.privacy { color: var(--muted); font-size: .8rem; line-height: 1.5; margin-top: 22px; border-top: 1px solid var(--line); padding-top: 16px; }
.error { color: var(--overdue); font-size: .9rem; margin-top: 12px; }

/* ---------- Dashboard ---------- */
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.topbar-actions { display: flex; gap: 8px; }
.ghost {
  background: var(--card); color: var(--text); border: 1px solid var(--line);
  padding: 8px 12px; border-radius: 9px; font-size: .88rem;
}
.ghost:hover { background: var(--card-2); }
.ghost.danger { color: #ffc2c2; }
.ghost.danger:hover { border-color: var(--overdue); }

.filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.chip {
  background: var(--card); color: var(--muted); border: 1px solid var(--line);
  padding: 7px 13px; border-radius: 999px; font-size: .86rem;
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.spacer { flex: 1; }
.toggle { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: .84rem; }

.status { color: var(--muted); font-size: .9rem; margin: 10px 2px; min-height: 1.2em; }

.group-title { margin: 22px 4px 10px; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.group-title.overdue { color: var(--overdue); }

.card {
  display: block; text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 10px;
  transition: transform .08s ease, background .1s ease;
}
.card:hover { background: var(--card-2); transform: translateY(-1px); }
.card.is-overdue { border-left-color: var(--overdue); }
.card.is-soon { border-left-color: var(--soon); }
.card.is-done { opacity: .6; }

.card-top { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.card-title { font-weight: 600; font-size: 1.02rem; margin: 0; }
.card-due { font-size: .82rem; white-space: nowrap; color: var(--muted); }
.card-due.overdue { color: var(--overdue); font-weight: 600; }
.card-due.soon { color: var(--soon); font-weight: 600; }

.card-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.course-badge { font-size: .76rem; padding: 3px 9px; border-radius: 999px; background: var(--bg-2); color: var(--accent-2); border: 1px solid var(--line); }
.kid-badge { font-size: .76rem; padding: 3px 9px; border-radius: 999px; background: rgba(106,162,255,.18); color: #cfe0ff; border: 1px solid var(--accent); font-weight: 600; }
.empty-sub { font-size: .82rem; margin-top: 10px; max-width: 420px; margin-left: auto; margin-right: auto; }
.pill { font-size: .74rem; padding: 3px 8px; border-radius: 999px; font-weight: 600; }
.pill.type { background: var(--bg-2); color: var(--muted); }
.pill.points { background: var(--bg-2); color: var(--muted); }
.pill.submitted { background: rgba(55,211,153,.15); color: var(--ok); }
.pill.missing { background: rgba(255,107,107,.15); color: var(--overdue); }
.pill.graded { background: rgba(79,140,255,.15); color: var(--accent-2); }

.empty { text-align: center; color: var(--muted); padding: 50px 20px; }
.empty .big { font-size: 2.4rem; }

.foot { text-align: center; color: var(--muted); font-size: .78rem; margin-top: 30px; }

.spinner {
  width: 18px; height: 18px; border: 2px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; display: inline-block; vertical-align: -3px; margin-right: 8px;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 480px) {
  .card-top { flex-direction: column; gap: 4px; }
  .card-due { white-space: normal; }
}