:root {
  --verde-tecnm: #006633;
  --verde-oscuro: #00431f;
  --verde-claro: #e6f2ea;
  --gris-oscuro: #2b2b2b;
  --gris-medio: #6b6b6b;
  --gris-claro: #f4f5f6;
  --borde: #dcdfe1;
  --rojo: #c0392b;
  --blanco: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--gris-claro);
  color: var(--gris-oscuro);
}

header.topbar {
  background: linear-gradient(90deg, var(--verde-tecnm), var(--verde-oscuro));
  color: #fff;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

header.topbar .brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

header.topbar .brand .logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
  color: var(--verde-tecnm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
}

header.topbar .brand h1 {
  font-size: 17px;
  margin: 0;
  font-weight: 600;
}

header.topbar .brand span {
  display: block;
  font-size: 12px;
  opacity: 0.85;
  font-weight: 400;
}

header.topbar .user-box {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
}

header.topbar .user-box a {
  color: #fff;
  background: rgba(255,255,255,0.15);
  padding: 7px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 13px;
  transition: background 0.15s;
}
header.topbar .user-box a:hover { background: rgba(255,255,255,0.3); }

.badge-rol {
  background: #ffcc00;
  color: #333;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
}

.container {
  max-width: 1180px;
  margin: 24px auto;
  padding: 0 20px;
}

.card {
  background: #fff;
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.login-wrapper {
  min-height: calc(100vh - 0px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--verde-tecnm), #013d1c 120%);
}

.login-card {
  background: #fff;
  width: 100%;
  max-width: 380px;
  padding: 34px 32px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  text-align: center;
}

.login-card .logo-grande {
  width: 66px;
  height: 66px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--verde-claro);
  color: var(--verde-tecnm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 22px;
}

.login-card h2 {
  margin: 0 0 4px;
  color: var(--verde-tecnm);
  font-size: 20px;
}

.login-card p.subt {
  margin: 0 0 22px;
  color: var(--gris-medio);
  font-size: 13px;
}

.login-card small.credenciales {
  display:block;
  margin-top: 16px;
  color: var(--gris-medio);
  font-size: 11.5px;
  line-height: 1.5;
}

label {
  display: block;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
  margin: 12px 0 5px;
  color: var(--gris-oscuro);
}

input[type=text], input[type=password], select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--borde);
  border-radius: 6px;
  font-size: 14px;
  background: #fbfbfb;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--verde-tecnm);
  background: #fff;
}

button, .btn {
  cursor: pointer;
  border: none;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 600;
  padding: 10px 16px;
  transition: 0.15s;
  display: inline-block;
  text-decoration: none;
}

.btn-primary {
  background: var(--verde-tecnm);
  color: #fff;
  width: 100%;
  margin-top: 18px;
  padding: 11px;
}
.btn-primary:hover { background: var(--verde-oscuro); }

.btn-small { padding: 5px 10px; font-size: 12px; }
.btn-danger { background: var(--rojo); color: #fff; }
.btn-danger:hover { background: #96291d; }
.btn-outline { background: #fff; color: var(--verde-tecnm); border: 1px solid var(--verde-tecnm); }
.btn-outline:hover { background: var(--verde-claro); }

.alert {
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13.5px;
  margin-bottom: 16px;
}
.alert-error { background: #fdecea; color: var(--rojo); border: 1px solid #f5c6c0; }
.alert-ok { background: var(--verde-claro); color: var(--verde-oscuro); border: 1px solid #b6ddc5; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.tabs a {
  text-decoration: none;
  padding: 9px 16px;
  border-radius: 20px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--verde-tecnm);
  background: var(--verde-claro);
  border: 1px solid transparent;
}
.tabs a.active {
  background: var(--verde-tecnm);
  color: #fff;
}

h2.titulo-sala {
  color: var(--verde-tecnm);
  margin: 0 0 4px;
  font-size: 20px;
}
p.leyenda {
  color: var(--gris-medio);
  font-size: 13px;
  margin: 0 0 18px;
}

table.horario {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.horario th, table.horario td {
  border: 1px solid var(--borde);
  padding: 6px;
  text-align: center;
  vertical-align: middle;
}
table.horario th {
  background: var(--verde-tecnm);
  color: #fff;
  font-weight: 600;
  padding: 10px 6px;
}
table.horario td.hora-col {
  background: var(--gris-claro);
  font-weight: 700;
  color: var(--gris-oscuro);
  white-space: nowrap;
  width: 110px;
}
table.horario td.celda {
  min-width: 130px;
  height: 64px;
}

.celda-libre {
  background: #fbfffc;
}
.celda-ocupada {
  background: #fff6e0;
}
.celda-mia {
  background: var(--verde-claro);
}

.materia-nombre {
  font-weight: 700;
  color: var(--gris-oscuro);
  font-size: 12.5px;
  display: block;
}
.materia-user {
  font-size: 11px;
  color: var(--gris-medio);
  display: block;
  margin-bottom: 4px;
}

form.form-reserva {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
form.form-reserva input[type=text] {
  font-size: 11.5px;
  padding: 5px 6px;
}
form.form-reserva select {
  font-size: 11px;
  padding: 4px;
}
form.form-reserva button {
  font-size: 11px;
  padding: 5px;
}

.link-apartar {
  color: var(--verde-tecnm);
  font-size: 12px;
  font-weight: 600;
  background: none;
  border: 1px dashed var(--verde-tecnm);
  border-radius: 6px;
  width: 100%;
  padding: 8px 4px;
}
.link-apartar:hover { background: var(--verde-claro); }

table.usuarios {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin-top: 10px;
}
table.usuarios th, table.usuarios td {
  border: 1px solid var(--borde);
  padding: 9px 10px;
  text-align: left;
}
table.usuarios th {
  background: var(--gris-claro);
}

.rol-pill {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 10px;
  text-transform: uppercase;
}
.rol-admin { background: #ffe9b3; color: #7a5300; }
.rol-user { background: var(--verde-claro); color: var(--verde-oscuro); }

.section-title {
  color: var(--verde-tecnm);
  border-bottom: 2px solid var(--verde-claro);
  padding-bottom: 8px;
  margin-top: 0;
  font-size: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
  table.horario { font-size: 11.5px; }
}

footer.footer {
  text-align: center;
  font-size: 12px;
  color: var(--gris-medio);
  margin: 30px 0 10px;
}