:root {
  --accent: #4fa0ff;
  --accent-dark: #2d7fe0;
  --fg: #16181d;
  --muted: #6b7280;
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #e4e7ec;
  --danger: #d64545;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.hidden { display: none !important; }

/* ---------- login ---------- */
#login { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-box {
  width: 340px; background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 36px 32px; text-align: center;
}
.login-logo { height: 40px; margin-bottom: 16px; }
.login-box h1 { font-family: Georgia, "Times New Roman", serif; font-size: 24px; margin: 0 0 4px; }
.login-box .sub { color: var(--muted); font-size: 13px; margin-bottom: 20px; }
.login-box input {
  width: 100%; padding: 11px 12px; border-radius: 9px; border: 1px solid var(--border);
  font-size: 14px; margin-bottom: 10px; background: #fff; color: var(--fg);
}
.login-box input:focus { outline: none; border-color: var(--accent); }
.login-box button {
  width: 100%; padding: 11px; border-radius: 9px; border: none; cursor: pointer;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 600;
}
.login-box button:hover { background: var(--accent-dark); }
.err { color: var(--danger); font-size: 13px; margin-top: 10px; }
#denied-banner {
  background: #fdeeee; border: 1px solid #f3c2c2; color: #a13434;
  padding: 12px 18px; border-radius: 10px; margin-bottom: 18px; font-size: 14px;
}

/* ---------- topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 28px; position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: Georgia, serif; font-size: 19px; }
.top-logo { height: 26px; }
.userbox { display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 14px; }
.link-btn { background: none; border: none; color: var(--accent-dark); cursor: pointer; font-size: 14px; padding: 4px; }
.link-btn:hover { text-decoration: underline; }

/* ---------- main ---------- */
main { max-width: 980px; margin: 0 auto; padding: 32px 24px 64px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; text-decoration: none; color: var(--fg); display: block;
  transition: transform .12s ease, box-shadow .12s ease; position: relative;
}
a.card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(17,24,39,.07); border-color: var(--accent); }
.card .icon { font-size: 26px; }
.card h3 { font-family: Georgia, serif; font-size: 17px; margin: 10px 0 4px; }
.card p { color: var(--muted); font-size: 13px; margin: 0; }
.card.disabled { opacity: .55; pointer-events: none; }
.badge {
  position: absolute; top: 14px; right: 14px; background: var(--accent); color: #fff;
  font-size: 10px; font-weight: 700; letter-spacing: .4px; padding: 3px 8px; border-radius: 99px;
}

/* ---------- admin ---------- */
#admin-sec { margin-top: 40px; }
#admin-sec h2 { font-family: Georgia, serif; font-size: 20px; }
#user-form {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 18px; display: flex; flex-direction: column; gap: 12px;
}
.uf-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
#user-form input, #user-form select {
  padding: 9px 11px; border-radius: 8px; border: 1px solid var(--border); font-size: 13px; background: #fff;
}
#user-form input:focus, #user-form select:focus { outline: none; border-color: var(--accent); }
#f-login { width: 150px; } #f-name { width: 170px; } #f-pass { width: 170px; }
#user-form button { padding: 9px 18px; border-radius: 8px; border: none; background: var(--accent); color: #fff; font-size: 13px; font-weight: 600; cursor: pointer; }
#user-form button:hover { background: var(--accent-dark); }
#user-form button.ghost { background: #eef1f5; color: var(--fg); }
.uf-groups { display: flex; gap: 14px; flex-wrap: wrap; }
.chk { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; }
.utable-wrap { overflow-x: auto; margin-top: 14px; }
#users-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; font-size: 13px; }
#users-table th, #users-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
#users-table th { background: #fafbfc; color: var(--muted); font-weight: 600; }
#users-table tr:last-child td { border-bottom: none; }
.tag { display: inline-block; background: #eef4ff; color: var(--accent-dark); border-radius: 6px; padding: 2px 7px; margin: 1px 2px 1px 0; font-size: 11px; }
.tag.off { background: #f3f4f6; color: var(--muted); }
.row-btn { background: none; border: none; color: var(--accent-dark); cursor: pointer; font-size: 13px; padding: 2px 6px; }
.row-btn.del { color: var(--danger); }
.row-btn:hover { text-decoration: underline; }