@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@9..40,400;500;600;700&family=Merriweather:wght@400;700;900&display=swap");

:root {
  --utb-amarillo: #f1be06;
  --utb-amarillo-suave: #fff1ba;
  --utb-rosa: #c3b9a6;
  --utb-violeta: #433a30;
  --utb-crema: #fffcf2;
  --utb-azul-palido: #f4efe2;
  --fondo: #f3efe3;
  --tarjeta: #ffffff;
  --borde: #d8cfbc;
  --acento: #201a14;
  --acento-marca: #3f3427;
  --acento-claro: #6c5a41;
  --texto: #2d261f;
  --texto-suave: #6f6254;
  --texto-muted: #948775;
  --ok: #26bfa9;
  --sombra-shell: 0 16px 34px rgba(45, 35, 21, 0.14), 0 4px 10px rgba(45, 35, 21, 0.08);
  --font-serif: "Merriweather", Georgia, "Times New Roman", serif;
  --font-sans: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: radial-gradient(ellipse 130% 90% at 50% -15%, #fff8dd 0%, #f8f2df 42%, #f0ead8 100%);
  background-attachment: fixed;
  color: var(--texto);
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: clip;
}

a {
  color: var(--acento-claro);
}

/* ========== Marco UTB (tarjeta principal) ========== */
.utb-pagina {
  width: 100%;
  max-width: min(1040px, 100%);
  margin: 0 auto;
  padding: clamp(0.75rem, 3vw, 1.5rem) clamp(0.5rem, 2.5vw, 1rem) clamp(2rem, 5vw, 3rem);
}

.utb-shell {
  width: 100%;
  max-width: 100%;
  background: var(--tarjeta);
  border-radius: clamp(12px, 2vw, 16px);
  box-shadow: var(--sombra-shell);
  overflow: hidden;
}

.utb-gradient-bar {
  height: 4px;
  width: 100%;
  background: linear-gradient(90deg, #7e7569 0%, #f1be06 50%, #3f3427 100%);
}

.utb-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem 1.5rem;
  padding: clamp(1rem, 3vw, 1.35rem) clamp(1rem, 3vw, 1.75rem) clamp(0.9rem, 2.5vw, 1.1rem);
  border-bottom: 1px solid #e7deca;
}

.utb-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
  padding: 0.35rem 0.6rem;
  border-radius: 12px;
  background: linear-gradient(180deg, #fffaf0 0%, #f8f1df 100%);
  border: 1px solid #d4c7a0;
}

.utb-logo-img {
  display: block;
  height: clamp(56px, 8vw, 72px);
  width: auto;
  max-width: min(320px, 82vw);
  object-fit: contain;
  opacity: 1;
  filter: brightness(1) contrast(1.03) saturate(1.06) drop-shadow(0 2px 4px rgba(35, 28, 18, 0.2));
}

.utb-logo-mark {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(145deg, #1a2c49 0%, #16253d 100%);
  color: #9ec1ff;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(6, 14, 30, 0.6);
}

.utb-logo-texto {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.utb-logo-marca {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
  color: var(--acento);
  letter-spacing: -0.02em;
}

.utb-logo-sub {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--texto-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.utb-title-block {
  flex: 1 1 220px;
  min-width: 0;
}

.utb-title-block--inicio {
  text-align: center;
}

.utb-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.7rem);
  font-weight: 700;
  color: var(--acento);
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.utb-subtitle {
  margin: 0.4rem 0 0;
  font-size: clamp(0.82rem, 2.2vw, 0.95rem);
  color: var(--texto-suave);
  font-weight: 500;
  max-width: 36rem;
  overflow-wrap: anywhere;
}

.utb-meta {
  text-align: right;
  flex-shrink: 0;
}

.utb-badge {
  display: inline-block;
  background: var(--utb-amarillo-suave);
  color: #4a3c24;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.4rem 0.95rem;
  border-radius: 999px;
  border: 1px solid #d5b45a;
}

.utb-fecha {
  margin: 0.45rem 0 0;
  font-size: 0.72rem;
  color: var(--texto-muted);
  font-weight: 500;
}

.utb-cuerpo {
  padding: clamp(0.75rem, 2vw, 1rem) clamp(0.75rem, 3vw, 1.75rem) clamp(1.5rem, 4vw, 2rem);
}

.utb-cuerpo--portada {
  padding-top: clamp(0.5rem, 2vw, 0.75rem);
}

.utb-intro {
  text-align: center;
  color: var(--texto-suave);
  font-size: 0.95rem;
  max-width: 34rem;
  margin: 0 auto 1.75rem;
  line-height: 1.6;
}

/* ========== Contenido formularios ========== */
.contenedor {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 0 1rem;
}

.tarjeta {
  background: #fffdf7;
  border-radius: clamp(10px, 2vw, 12px);
  border: 1px solid var(--borde);
  box-shadow: 0 1px 2px rgba(45, 35, 21, 0.08);
  padding: clamp(1rem, 3vw, 1.35rem) clamp(0.85rem, 3vw, 1.5rem);
  margin-bottom: 1rem;
  max-width: 100%;
  min-width: 0;
}

.tarjeta h2 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--acento-marca);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #ece3cf;
}

.grupo {
  margin-bottom: 1rem;
}

.grupo:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--texto);
  margin-bottom: 0.35rem;
  letter-spacing: 0.01em;
}

label .opcional {
  font-weight: 400;
  color: var(--texto-suave);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="url"],
input[type="search"],
select,
textarea {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--borde);
  border-radius: 10px;
  font-size: 0.92rem;
  font-family: var(--font-sans);
  background: #ffffff;
  color: var(--texto);
}

input[type="file"] {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--borde);
  border-radius: 10px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  background: #ffffff;
  color: var(--texto);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: #d3ad45;
  box-shadow: 0 0 0 3px rgba(241, 190, 6, 0.22);
}

textarea {
  min-height: 88px;
  resize: vertical;
}

.fila-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.fila-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

@media (max-width: 900px) {
  .utb-header {
    gap: 1rem;
  }

  .utb-title-block {
    flex-basis: 100%;
    order: 3;
  }

  .utb-logo {
    order: 1;
  }

  .utb-meta {
    order: 2;
    margin-left: auto;
    text-align: right;
  }
}

@media (max-width: 640px) {
  .fila-2 {
    grid-template-columns: minmax(0, 1fr);
  }

  .fila-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .utb-header {
    flex-direction: column;
    align-items: stretch;
  }

  .utb-meta {
    order: unset;
    margin-left: 0;
    text-align: left;
    width: 100%;
  }

  .utb-title-block {
    order: unset;
  }

  .acciones {
    flex-direction: column;
  }

  .acciones .btn {
    width: 100%;
  }

  .eleccion {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  input[type="text"],
  input[type="email"],
  input[type="tel"],
  input[type="number"],
  input[type="url"],
  input[type="search"],
  select,
  textarea {
    font-size: 16px;
  }

  .utb-logo-mark {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  .bloque-proyecto-inv__cabecera,
  .bloque-tesis-dir__cabecera {
    flex-direction: column;
    align-items: flex-start;
  }
}

.areas-grid {
  display: grid;
  gap: 0.45rem;
  grid-template-columns: 1fr;
}

@media (min-width: 520px) {
  .areas-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.area-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.88rem;
}

.area-item input {
  margin-top: 0.25rem;
  flex-shrink: 0;
}

.acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--borde);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  text-decoration: none;
  transition: transform 0.12s, box-shadow 0.12s, background 0.12s;
}

.btn-primario {
  background: linear-gradient(135deg, #f2c11a 0%, #d9a80a 100%);
  color: #2c2417;
  box-shadow: 0 2px 10px rgba(120, 93, 25, 0.24);
}

.btn-primario:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.btn-secundario {
  background: #ffffff;
  color: #5c4d36;
  border: 1px solid var(--borde);
}

.btn-secundario:hover {
  background: var(--utb-azul-palido);
}

.nav-inicio {
  margin-bottom: 1rem;
  padding-top: 0.25rem;
}

.nav-inicio .btn-inicio {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  border-radius: 999px;
  text-decoration: none;
}

.nav-inicio .btn-inicio:hover {
  text-decoration: none;
}

.portada {
  text-align: center;
  padding: 0;
}

.portada h1 {
  display: none;
}

.portada > p {
  display: none;
}

.eleccion {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  max-width: 720px;
  margin: 0 auto;
}

.tarjeta-enlace {
  display: block;
  padding: 1.65rem 1.5rem;
  background: #fffdf7;
  border-radius: 14px;
  border: 1px solid var(--borde);
  box-shadow: 0 4px 20px rgba(45, 35, 21, 0.1);
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.tarjeta-enlace:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(71, 56, 28, 0.14);
  border-color: #d7bc75;
}

.tarjeta-enlace h2 {
  font-family: var(--font-serif);
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--acento-marca);
  border: none;
  padding: 0;
}

.tarjeta-enlace p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--texto-suave);
}

.ayuda {
  font-size: 0.78rem;
  color: var(--texto-muted);
  margin-top: 0.25rem;
}

.ayuda-bloque {
  margin-top: -0.35rem;
  margin-bottom: 1rem;
}

.repetible {
  border: 1px dashed #d8c8a5;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: #fffaf0;
}

.repetible-titulo {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--texto-muted);
  margin-bottom: 0.75rem;
}

.bloque-proyecto-inv,
.bloque-tesis-dir {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--borde);
}

.bloque-proyecto-inv:last-child,
.bloque-tesis-dir:last-child {
  margin-bottom: 0.5rem;
  padding-bottom: 0;
  border-bottom: none;
}

.bloque-proyecto-inv__cabecera,
.bloque-tesis-dir__cabecera {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.bloque-proyecto-inv__cabecera span,
.bloque-tesis-dir__cabecera span {
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--acento-marca);
}

.btn-anadir-proyecto,
.btn-anadir-tesis-dir {
  margin-top: 0.35rem;
}

.btn-quitar-proyecto-inv,
.btn-quitar-tesis-dir {
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
}

/* Página de éxito guardar.php */
.utb-exito {
  width: 100%;
  max-width: min(520px, 100%);
  margin: 0 auto;
  padding: 0.5rem 0 0;
}

.utb-exito .tarjeta {
  background: #fffdf7;
}

.panel-registros {
  margin-top: 1.5rem;
  text-align: left;
}

.panel-registros__titulo {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--acento-marca);
}

.perfiles-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.perfil-card {
  position: relative;
  background: #fffdf7;
  border: 1px solid var(--borde);
  border-radius: 12px;
  padding: 0;
  transition: transform 0.12s, box-shadow 0.12s, border-color 0.12s;
}

.perfil-card:hover {
  transform: translateY(-1px);
  border-color: #d7bc75;
  box-shadow: 0 8px 22px rgba(71, 56, 28, 0.12);
}

.perfil-card__link {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  text-decoration: none;
  color: inherit;
  padding: 0.75rem;
}

.perfil-card__foto {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid #d9ccb1;
  background: #f7f0df;
}

.perfil-card__contenido {
  min-width: 0;
}

.perfil-card__tipo {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #5b4c31;
  background: #f6e6b1;
  border: 1px solid #e0c36d;
  border-radius: 999px;
  padding: 0.18rem 0.5rem;
}

.perfil-card__nombre {
  margin: 0.35rem 0 0.2rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--acento);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.perfil-card__area {
  margin: 0;
  font-size: 0.8rem;
  color: var(--texto-suave);
}

.utb-meta--con-acciones {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.utb-userbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem 0.65rem;
  font-size: 0.82rem;
  color: var(--texto-suave);
}

.utb-userbar__nombre {
  font-weight: 600;
  color: var(--texto);
}

.utb-userbar__login {
  font-family: ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--texto-muted);
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
}

.utb-flash {
  margin: 0;
  padding: 0.85rem 1.25rem;
  background: var(--utb-amarillo-suave);
  border-bottom: 1px solid #e6cf7a;
  font-size: 0.9rem;
  line-height: 1.45;
}

.portada--login {
  max-width: 520px;
  margin: 0 auto;
}

.tarjeta--login h2 {
  margin-top: 0;
  font-family: var(--font-serif);
  font-size: 1.1rem;
}

.form-login .grupo {
  margin-bottom: 0.75rem;
}

.acciones--login {
  margin-top: 0.5rem;
  padding-top: 0;
  border: none;
}

.utb-alerta {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.utb-alerta--error {
  background: #fdecea;
  border: 1px solid #e8b4b0;
  color: #6b2e2a;
}

.perfil-card__main {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  padding: 0.75rem 0.75rem 0.35rem;
}

.perfil-card__acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 0.75rem 0.75rem;
  border-top: 1px solid #eee6d4;
  margin-top: 0.25rem;
  padding-top: 0.65rem;
}

.perfil-card__acciones .btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}