/* ========================
   PALETA GLOBAL
======================== */
:root {
    --accent: #4c8dff;
    --accent-soft: rgba(76, 141, 255, 0.15);

    --bg-main: #121212;
    --bg-card: #181818;
    --bg-soft: #1c1c1c;

    --border: #2a2a2a;
    --text-main: #e4e4e4;
    --text-soft: #aaa;

    --success: #3bd16f;
    --danger: #ff5c5c;
}


/* ========================
   RESET
======================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Roboto, sans-serif;
}


/* ========================
   BODY
======================== */
body {
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    padding: 30px clamp(20px, 6vw, 80px);
}


/* ========================
   HEADER
======================== */
header {
    text-align: center;
    margin-bottom: 30px;

    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}


/* ========================
   TITULOS
======================== */
h2 {
    color: var(--accent);
    letter-spacing: 1px;
    font-weight: 500;
}


/* ========================
   BOTONES BASE
======================== */
button {
    background: #1f1f1f;
    border: 1px solid #333;
    color: #ddd;
    padding: 9px 16px;
    border-radius: 7px;
    cursor: pointer;
    transition: 0.25s;
    font-size: 0.95rem;
}

button:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: white;
}


/* ========================
   BOTONES HEADER
======================== */
#curso_button {
    background: #1f2f4f;
    border-color: var(--accent);
}

#curso_button:hover {
    background: var(--accent);
}

#generar {
    background: #1e4d2b;
    border-color: var(--success);
    font-weight: 600;
}

#generar:hover {
    background: var(--success);
    color: #062b14;
}


/* ========================
   FORMULARIOS
======================== */
form {
    margin-top: 20px;
}

fieldset {
    border: 1px solid var(--border);
    padding: 16px;
    border-radius: 10px;
    background: var(--bg-card);
    margin-top: 20px;
}

legend {
    color: var(--accent);
    padding: 0 10px;
}

label {
    display: block;
    margin-top: 12px;
    margin-bottom: 4px;
    color: var(--text-soft);
}

input,
select {
    background: #101010;
    border: 1px solid #333;
    color: #eee;
    padding: 7px 10px;
    border-radius: 6px;
    transition: 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

input[type="text"],
select {
    width: 100%;
    max-width: 420px;
}

input[type="color"] {
    height: 38px;
    width: 60px;
}


/* ========================
   LISTA DE CURSOS
======================== */
#listaCursos > div {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 14px 18px;
    border-radius: 10px;
    margin-top: 15px;

    box-shadow: 0 0 0 transparent;
    transition: 0.25s;
}

#listaCursos > div:hover {
    box-shadow: 0 0 12px rgba(0,0,0,0.4);
}

#listaCursos button {
    margin-top: 10px;
    background: #3a1f1f;
    border-color: var(--danger);
}

#listaCursos button:hover {
    background: var(--danger);
    color: white;
}


/* ========================
   TABLA HORARIOS
======================== */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: var(--bg-card);
}

th {
    background: var(--bg-soft);
    color: var(--accent);
    font-weight: 500;
}

td, th {
    border: 1px solid var(--border);
    padding: 8px;
    text-align: center;
}

td {
    transition: 0.2s;
}


/* ========================
   CELDA CON CURSO
======================== */


/* ========================
   NAVEGACION HORARIOS
======================== */
#resultados > div {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 15px;
}

#prevHorario,
#nextHorario {
    background: #1f2f4f;
    border-color: var(--accent);
}

#prevHorario:hover,
#nextHorario:hover {
    background: var(--accent);
}

/* ========================
   PREVIEW GRUPOS (LISTA INTEGRADA)
======================== */


#gruposPreview {
    margin: 10px 0 0;
    max-width: 520px;          /* limita ancho */
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-soft);
}


/* Cada grupo */
#gruposPreview > div {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    gap: 10px;
}

#gruposPreview > div:last-child {
    border-bottom: none;
}


/* Texto ocupa todo el espacio */
#gruposPreview span {
    flex: 1;
    overflow-wrap: anywhere;
}


/* Nombre grupo */
#gruposPreview strong {
    color: var(--accent);
    font-weight: 500;
}


/* Botón eliminar completamente a la derecha */
#gruposPreview button {
    margin-left: auto;
    background: transparent;
    border: 1px solid var(--border);
    padding: 2px 8px;
    font-size: 0.8rem;
    flex-shrink: 0;
}

#gruposPreview button:hover {
    border-color: var(--danger);
    background: rgba(255, 92, 92, 0.15);
    color: var(--danger);
}

#agregar_grupo, #grupo_guardar {
    margin-top: 12px;
}

#grupo_cancelar,
#curso_cancelar {
    background: #660505;
    border-color: #444;
}

#grupo_cancelar:hover,
#curso_cancelar:hover {
    background: #a70000;
}


/* ========================
   RESPONSIVE
======================== */
@media (max-width: 800px) {
    table {
        font-size: 0.85rem;
    }

    button {
        width: 100%;
    }
}