:root {
  --ink: #1a1a16;
  --mute: #73726c;
  --line: #d8d6cc;
  --panel: #f1efe8;
  --white: #ffffff;
  --accent: #185fa5;
  --accent-bg: #e6f1fb;
  --green: #3b6d11;
  --green-bg: #eaf3de;
  --red: #993c1d;
  --red-bg: #faece7;
  --amber: #854f0b;
  --amber-bg: #faeeda;
  font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #f7f6f2;
  color: var(--ink);
}

.topbar {
  background: #193869;
  color: white;
  padding: 12px 24px;
  font-size: 15px;
}

.nav {
  background: var(--white);
  border-bottom: 1px solid var(--line);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav .brand { font-weight: 700; margin-right: auto; }
.nav a { color: var(--mute); text-decoration: none; font-size: 14px; }
.nav a.active { color: var(--accent); font-weight: 700; }
.nav .rol { color: var(--mute); font-size: 13px; margin-left: auto; }
.nav-enlaces { display: contents; }
.nav-menu-toggle,
.nav-cerrar-movil,
.nav-overlay {
  display: none;
}
.nav-menu-toggle {
  align-items: center;
  gap: 7px;
}
.nav-menu-icono {
  font-size: 20px;
  line-height: 1;
}

.container { max-width: 960px; margin: 24px auto; padding: 0 20px; }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 18px;
}
.card h2 { font-size: 15px; margin: 0 0 14px; }

.banner {
  border-radius: 8px;
  padding: 12px 16px;
  text-align: center;
  font-size: 14px;
  margin-bottom: 18px;
  border: 1px solid;
}
.banner.info    { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.banner.ok      { background: var(--green-bg);  border-color: var(--green);  color: var(--green); }
.banner.warn    { background: var(--amber-bg);  border-color: var(--amber);  color: var(--amber); }
.banner.closed  { background: var(--panel);     border-color: var(--line);   color: var(--mute); }

.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 18px; }
.metric { background: var(--white); border: 1px solid var(--line); border-radius: 10px; padding: 16px; text-align: center; }
.metric .valor { font-size: 26px; font-weight: 700; color: var(--accent); }
.metric .label { font-size: 12px; color: var(--mute); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: 12px; color: var(--mute); padding: 8px 6px; border-bottom: 1px solid var(--line); }
td { padding: 10px 6px; font-size: 14px; border-bottom: 1px solid var(--line); }

.badge { font-size: 12px; padding: 3px 10px; border-radius: 6px; display: inline-block; }
.badge.pendiente  { background: var(--amber-bg); color: var(--amber); }
.badge.aprobada   { background: var(--green-bg); color: var(--green); }
.badge.rechazada  { background: var(--red-bg);   color: var(--red); }

label { display: block; font-size: 12px; color: var(--mute); margin-bottom: 4px; }
input[type=text], input[type=email], input[type=password],
input[type=date], textarea, select {
  width: 100%; height: 38px; border: 1px solid var(--line); border-radius: 8px;
  padding: 0 10px; font-size: 14px; margin-bottom: 14px; font-family: inherit;
}
textarea { height: auto; padding: 10px; resize: vertical; }

button, .btn {
  background: var(--accent); color: white; border: none; border-radius: 8px;
  padding: 10px 18px; font-size: 14px; cursor: pointer; text-decoration: none; display: inline-block;
}
button.secundario, .btn.secundario { background: var(--white); color: var(--ink); border: 1px solid var(--line); }
button.rechazar { background: var(--red); }
button.aprobar  { background: var(--green); }

.login-box {
  max-width: 340px; margin: 60px auto; background: var(--white);
  border: 1px solid var(--line); border-radius: 12px; padding: 28px;
}
.login-box h1 { font-size: 18px; text-align: center; margin: 0 0 20px; }
.error { background: var(--red-bg); color: var(--red); padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }
.hint { font-size: 12px; color: var(--mute); text-align: center; margin-top: 14px; }

body.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  padding: 24px;
  background: #f7f6f2;
}

body.login-page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url("../../img/Logo-TecNM.png");
  background-repeat: no-repeat;
  background-position: center;
  background-size: auto 100vh;
  opacity: 0.16;
  pointer-events: none;
}

.login-page .login-box {
  width: 100%;
  max-width: 420px;
  margin: 0;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 50px rgba(25, 56, 105, 0.18);
  backdrop-filter: blur(3px);
}

@media (max-width: 600px) {
  body.login-page {
    padding: 16px;
  }

  body.login-page::before {
    background-position: 35% center;
    opacity: 0.12;
  }

  .login-page .login-box {
    padding: 24px 20px;
  }
}

.radio-group { display: flex; gap: 18px; align-items: center; }
.radio-group label { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink); margin: 0; }

.nav .rol { margin-left: auto; }
.nav .btn-salir {
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 6px 14px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 13px;
  margin-left: 10px;
  white-space: nowrap;
}
.nav .btn-salir:hover {
  background: var(--panel);
  border-color: var(--mute);
}

.paginacion {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.paginacion-resumen {
  color: var(--mute);
  font-size: 13px;
}
.paginacion-enlaces {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.paginacion-enlaces .btn,
.paginacion-enlaces .pagina-activa {
  min-width: 36px;
  padding: 7px 10px;
  text-align: center;
}
.paginacion-enlaces .pagina-activa {
  color: var(--white);
  background: var(--accent);
  border-radius: 8px;
  font-size: 13px;
}

@media (max-width: 600px) {
  .paginacion {
    align-items: stretch;
  }
  .paginacion-enlaces {
    width: 100%;
  }
}

@media (max-width: 760px) {
  body.menu-movil-abierto {
    overflow: hidden;
  }

  .topbar {
    padding: 10px 14px;
  }

  .nav {
    display: grid;
    gap: 8px;
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding: 9px 12px;
  }

  .nav-menu-toggle {
    display: inline-flex;
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    padding: 7px 10px;
  }

  .nav .brand {
    display: none;
  }

  .nav-enlaces {
    background: var(--white);
    box-shadow: 8px 0 28px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    gap: 4px;
    height: 100vh;
    left: 0;
    overflow-y: auto;
    padding: 18px;
    position: fixed;
    top: 0;
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    width: min(82vw, 310px);
    z-index: 1001;
  }

  .nav.menu-abierto .nav-enlaces {
    transform: translateX(0);
  }

  .nav .nav-enlaces a {
    border-radius: 8px;
    color: var(--ink);
    display: block;
    font-size: 15px;
    padding: 11px 12px;
  }

  .nav .nav-enlaces a.active {
    background: var(--accent-bg);
    color: var(--accent);
  }

  .nav-cerrar-movil {
    align-self: flex-end;
    display: block;
    margin-bottom: 8px;
    padding: 7px 11px;
  }

  .nav-overlay {
    background: rgba(0, 0, 0, 0.38);
    border: 0;
    border-radius: 0;
    cursor: default;
    inset: 0;
    padding: 0;
    position: fixed;
    z-index: 1000;
  }

  .nav.menu-abierto .nav-overlay {
    display: block;
  }

  .nav .selector-carrera {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-left: 0;
    width: 100%;
  }

  .nav .selector-carrera select {
    flex: 1;
    min-width: 0;
    width: 100%;
  }

  .nav .usuario-actual {
    align-self: center;
    font-size: 11px;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    margin-left: 0 !important;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
    padding-right: 0;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav .contexto-carrera {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: stretch;
    margin-left: 0 !important;
    max-width: 100%;
    padding: 4px 0;
    text-align: center;
  }

  .nav .btn-salir {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    font-size: 12px;
    margin-left: 0;
    padding: 7px 9px;
  }

  .container {
    margin: 16px auto;
    padding: 0 12px;
  }

  .card {
    overflow-x: auto;
    padding: 16px 14px;
  }

  .metrics {
    grid-template-columns: 1fr !important;
  }

  .container [style*="min-width"] {
    min-width: 0 !important;
  }

  /* Formularios administrativos y reportes: una columna legible en movil. */
  .card form[style*="display:flex"],
  .card form[style*="display: flex"],
  .card form[style*="display:grid"],
  .card form[style*="display: grid"],
  .card form > div[style*="display:flex"],
  .card form > div[style*="display: flex"],
  .card form > div[style*="display:grid"],
  .card form > div[style*="display: grid"] {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    align-items: stretch !important;
    gap: 10px !important;
    width: 100% !important;
  }

  .card form[style*="display"] > div,
  .card form > div[style*="display"] > div {
    flex: none !important;
    min-width: 0 !important;
    max-width: none !important;
    width: 100% !important;
  }

  .card form input:not([type="radio"]):not([type="checkbox"]):not([type="hidden"]),
  .card form select,
  .card form textarea {
    display: block;
    max-width: 100% !important;
    min-width: 0 !important;
    width: 100% !important;
  }

  .card form input[type="time"] {
    height: 38px;
    margin-bottom: 14px;
  }

  .card form[style*="display"] > div[style*="margin-bottom"] {
    margin-bottom: 0 !important;
  }

  /* Las asignaciones se convierten en tarjetas para evitar columnas
     comprimidas y botones cortados en pantallas angostas. */
  .tabla-asignaciones,
  .tabla-asignaciones tbody {
    display: block;
    width: 100%;
  }

  .tabla-asignaciones thead,
  .tabla-asignaciones thead tr {
    display: block;
  }

  .tabla-asignaciones thead th {
    display: none;
  }

  .tabla-asignaciones thead th:first-child {
    align-items: center;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
    padding: 10px 12px;
    width: 100% !important;
  }

  .texto-seleccionar-movil {
    display: inline;
    font-size: 12px;
    font-weight: 600;
  }

  .tabla-asignaciones tbody tr {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 10px;
    display: grid;
    gap: 12px;
    grid-template-columns: minmax(0, 1fr);
    margin-bottom: 12px;
    padding: 14px;
    position: relative;
  }

  .tabla-asignaciones tbody td {
    border: 0;
    display: block;
    padding: 0;
    width: 100%;
  }

  .tabla-asignaciones td[data-label]::before {
    color: var(--mute);
    content: attr(data-label);
    display: block;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 5px;
    text-transform: uppercase;
  }

  .tabla-asignaciones .asignacion-selector {
    position: absolute;
    right: 14px;
    top: 14px;
    width: auto;
  }

  .tabla-asignaciones .asignacion-alumno,
  .tabla-asignaciones .asignacion-tutor {
    padding-right: 38px;
  }

  .tabla-asignaciones .asignacion-accion form {
    display: grid !important;
    gap: 8px !important;
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100%;
  }

  .tabla-asignaciones .asignacion-accion select,
  .tabla-asignaciones .asignacion-accion button {
    margin: 0 !important;
    width: 100%;
  }

  .tabla-asignaciones .asignacion-vacia td {
    text-align: center;
  }
}

.texto-seleccionar-movil {
  display: none;
}

@media (max-width: 760px) {
  .texto-seleccionar-movil {
    display: inline;
  }
}