:root {
  --lcc-red: #c8102e;
  --lcc-red-dark: #9a0c22;
  --lcc-black: #111111;
  --lcc-white: #ffffff;
  --lcc-gray-50: #f7f7f8;
  --lcc-gray-100: #ececee;
  --lcc-gray-300: #c5c5cb;
  --lcc-gray-600: #5c5c66;
  --lcc-gray-800: #2a2a30;
  --lcc-success: #1f7a3f;
  --lcc-warning: #b7791f;
  --lcc-danger: #b42318;
  --sidebar-w: 240px;
  --font: "Gotham", "Avenir Next", "Segoe UI", sans-serif;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: var(--font); color: var(--lcc-black); background: linear-gradient(180deg, #fafafa 0%, #f0f0f2 100%); min-height: 100%; }
a { color: var(--lcc-red); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }
.sidebar {
  background: var(--lcc-black);
  color: var(--lcc-white);
  padding: 1.25rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand { display: flex; align-items: center; gap: .75rem; margin-bottom: 2rem; }
.brand img { height: 42px; width: auto; }
.brand span { font-weight: 700; letter-spacing: .04em; font-size: 1.1rem; }
.nav a {
  display: block;
  color: #ddd;
  padding: .7rem .85rem;
  border-radius: 8px;
  margin-bottom: .25rem;
  text-decoration: none;
}
.nav a:hover, .nav a.active { background: var(--lcc-red); color: #fff; }

.main { padding: 1.25rem 1.5rem 2.5rem; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; gap: 1rem; }
.topbar h1 { margin: 0; font-size: 1.5rem; }
.user-chip { color: var(--lcc-gray-600); font-size: .9rem; }

.flash { list-style: none; padding: 0; margin: 0 0 1rem; }
.flash li { padding: .75rem 1rem; border-radius: var(--radius); margin-bottom: .5rem; }
.flash .success { background: #e8f6ee; color: var(--lcc-success); }
.flash .error { background: #fdecea; color: var(--lcc-danger); }
.flash .warning { background: #fff7e6; color: var(--lcc-warning); }

.panel {
  background: var(--lcc-white);
  border: 1px solid var(--lcc-gray-100);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 0 rgba(0,0,0,.03);
}
.panel h2 { margin: 0 0 .75rem; font-size: 1.05rem; }
.grid-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .75rem; }
.stat { background: var(--lcc-gray-50); border-radius: 8px; padding: .9rem; }
.stat strong { display: block; font-size: 1.4rem; }
.stat span { color: var(--lcc-gray-600); font-size: .85rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .65rem .5rem; border-bottom: 1px solid var(--lcc-gray-100); vertical-align: top; font-size: .92rem; }
th { color: var(--lcc-gray-600); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 0; border-radius: 8px; padding: .55rem 1rem; cursor: pointer;
  font-weight: 600; font-size: .92rem; text-decoration: none; background: var(--lcc-red); color: #fff;
}
.btn:hover { background: var(--lcc-red-dark); text-decoration: none; color: #fff; }
.btn.secondary { background: var(--lcc-gray-800); }
.btn.ghost { background: transparent; color: var(--lcc-black); border: 1px solid var(--lcc-gray-300); }
.btn.large { min-height: 52px; min-width: 120px; font-size: 1rem; }
.btn.success { background: var(--lcc-success); }
.btn.warn { background: var(--lcc-warning); color: #111; }
.btn.danger { background: var(--lcc-danger); }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .85rem; }
label { display: flex; flex-direction: column; gap: .35rem; font-size: .88rem; color: var(--lcc-gray-800); }
input, select, textarea {
  border: 1px solid var(--lcc-gray-300); border-radius: 8px; padding: .55rem .7rem; font: inherit; background: #fff;
}
.checks { display: flex; flex-wrap: wrap; gap: .6rem 1rem; }
.checks label { flex-direction: row; align-items: center; gap: .35rem; }

.tabs { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.tabs a {
  padding: .45rem .8rem; border-radius: 999px; background: var(--lcc-gray-100); color: var(--lcc-gray-800); text-decoration: none; font-size: .88rem;
}
.tabs a.active { background: var(--lcc-red); color: #fff; }

.calendar {
  display: grid;
  grid-template-columns: repeat(7, minmax(140px, 1fr));
  gap: .5rem;
  overflow-x: auto;
}
.day-col {
  background: var(--lcc-white);
  border: 1px solid var(--lcc-gray-100);
  border-radius: 8px;
  min-height: 220px;
  padding: .5rem;
}
.day-col h3 { margin: 0 0 .5rem; font-size: .85rem; }
.session-block {
  border-left: 3px solid var(--lcc-red);
  background: var(--lcc-gray-50);
  padding: .4rem;
  margin-bottom: .4rem;
  border-radius: 4px;
  font-size: .78rem;
}
.session-block.lcr { border-left-color: var(--lcc-gray-800); }
.slot { display: flex; justify-content: space-between; gap: .25rem; margin: .2rem 0; }
.badge {
  display: inline-block; padding: .15rem .45rem; border-radius: 999px; font-size: .72rem; font-weight: 600;
  background: var(--lcc-gray-100);
}
.badge.ok { background: #e8f6ee; color: var(--lcc-success); }
.badge.warn { background: #fff7e6; color: var(--lcc-warning); }
.badge.err { background: #fdecea; color: var(--lcc-danger); }
.badge.info { background: #eef2ff; color: #3730a3; }

.login-page {
  min-height: 100vh; display: grid; place-items: center;
  background:
    radial-gradient(circle at 20% 20%, rgba(200,16,46,.18), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(0,0,0,.08), transparent 35%),
    linear-gradient(160deg, #111 0%, #2a2a30 55%, #111 100%);
}
.login-card {
  width: min(420px, 92vw); background: #fff; border-radius: 16px; padding: 2rem;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.login-card .brand { color: #111; justify-content: center; }
.login-card .brand img { filter: invert(1); }

.presence-card {
  background: #fff; border-radius: 12px; padding: 1rem; margin-bottom: .75rem; border: 1px solid var(--lcc-gray-100);
}
.presence-actions { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .75rem; }

.comm-row { display: grid; grid-template-columns: 110px 1fr 120px 120px; gap: .5rem; padding: .65rem 0; border-bottom: 1px solid var(--lcc-gray-100); font-size: .88rem; }
.alarm { padding: .5rem .7rem; border-radius: 8px; margin-bottom: .35rem; font-size: .88rem; }
.alarm.warning { background: #fff7e6; }
.alarm.critical { background: #fdecea; }

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: relative; height: auto; }
  .calendar { grid-template-columns: 1fr; }
  .comm-row { grid-template-columns: 1fr; }
}