/* ========================================
   PANTALLA DE DIBUJO INTERACTIVA
   Universidad Laboral de Albacete
   ======================================== */

/* Variables CSS */
:root {
    --color-principal: #2c3e50;
    --color-secundario: #3498db;
    --color-exito: #27ae60;
    --color-peligro: #e74c3c;
    --color-advertencia: #f39c12;
    --color-fondo: #ecf0f1;
    --color-panel: #ffffff;
    --color-texto: #2c3e50;
    --color-texto-claro: #7f8c8d;
    --sombra: 0 2px 10px rgba(0, 0, 0, 0.1);
    --sombra-fuerte: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transicion: all 0.3s ease;
    --border-radius: 8px;
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--color-fondo);
    color: var(--color-texto);
    overflow: hidden;
}

/* Layout principal */
#app {
    display: grid;
    grid-template-areas: 
        "header header header header"
        "herramientas dibujo capas propiedades"
        "estado estado estado estado";
    grid-template-columns: 250px 1fr 200px 200px;
    grid-template-rows: 60px 1fr 40px;
    height: 100vh;
    gap: 1px;
    background: #bdc3c7;
}

/* Header */
.header {
    grid-area: header;
    background: var(--color-principal);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: var(--sombra);
}

.header h1 {
    font-size: 1.5em;
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: 10px;
}

/* Botones */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    transition: var(--transicion);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-primary {
    background: var(--color-secundario);
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-texto-claro);
    color: white;
}

.btn-secondary:hover {
    background: #6c7b7d;
}

.btn-danger {
    background: var(--color-peligro);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-success {
    background: var(--color-exito);
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.btn-small {
    padding: 4px 8px;
    font-size: 0.8em;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Panel de Herramientas */
.panel-herramientas {
    grid-area: herramientas;
    background: var(--color-panel);
    padding: 20px;
    overflow-y: auto;
    box-shadow: var(--sombra);
}

.herramienta-grupo {
    margin-bottom: 25px;
}

.herramienta-grupo h3 {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: var(--color-principal);
    border-bottom: 2px solid var(--color-secundario);
    padding-bottom: 5px;
}

.herramientas {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.herramienta {
    padding: 12px;
    border: 2px solid #ecf0f1;
    background: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transicion);
    font-size: 1.2em;
    text-align: center;
}

.herramienta:hover {
    border-color: var(--color-secundario);
    transform: translateY(-2px);
    box-shadow: var(--sombra);
}

.herramienta.activa {
    border-color: var(--color-secundario);
    background: #e3f2fd;
    color: var(--color-secundario);
}

/* Colores */
.colores {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.colores input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #ecf0f1;
}

.paleta-colores {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.color-preset {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #ecf0f1;
    transition: var(--transicion);
}

.color-preset:hover {
    transform: scale(1.1);
    border-color: var(--color-secundario);
}

/* Slider */
.slider {
    width: 100%;
    margin: 10px 0;
}

#grosor-valor {
    display: block;
    text-align: center;
    font-size: 0.9em;
    color: var(--color-texto-claro);
}

/* Checkboxes */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    font-size: 0.9em;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

/* Área de Dibujo */
.area-dibujo {
    grid-area: dibujo;
    background: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--sombra);
}

.canvas-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: auto;
}

#canvas, #canvas-temp {
    position: absolute;
    top: 0;
    left: 0;
    cursor: crosshair;
    border: 1px solid #bdc3c7;
}

#canvas-temp {
    pointer-events: none;
    z-index: 2;
}

/* Zoom Controls */
.zoom-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border-radius: var(--border-radius);
    box-shadow: var(--sombra);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-zoom {
    width: 30px;
    height: 30px;
    border: none;
    background: var(--color-secundario);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.8em;
    transition: var(--transicion);
}

.btn-zoom:hover {
    background: #2980b9;
    transform: scale(1.1);
}

#zoom-level {
    font-size: 0.9em;
    font-weight: 500;
    min-width: 50px;
    text-align: center;
}

/* Panel de Capas */
.panel-capas {
    grid-area: capas;
    background: var(--color-panel);
    padding: 20px;
    overflow-y: auto;
    box-shadow: var(--sombra);
}

.capas-lista {
    margin-bottom: 15px;
}

.capa {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    margin-bottom: 5px;
    background: white;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transicion);
}

.capa:hover {
    border-color: var(--color-secundario);
}

.capa.activa {
    border-color: var(--color-secundario);
    background: #e3f2fd;
}

.capa-controles {
    display: flex;
    gap: 5px;
}

.btn-capa {
    width: 25px;
    height: 25px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 3px;
    font-size: 0.8em;
    transition: var(--transicion);
}

.btn-capa:hover {
    background: #ecf0f1;
}

/* Panel de Propiedades */
.panel-propiedades {
    grid-area: propiedades;
    background: var(--color-panel);
    padding: 20px;
    overflow-y: auto;
    box-shadow: var(--sombra);
}

#propiedades-contenido {
    font-size: 0.9em;
    color: var(--color-texto-claro);
}

/* Barra de Estado */
.barra-estado {
    grid-area: estado;
    background: var(--color-principal);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    font-size: 0.9em;
}

.estado-info {
    display: flex;
    gap: 20px;
}

.estado-acciones {
    display: flex;
    gap: 10px;
}

/* Modales */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-contenido {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--sombra-fuerte);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Formularios */
.form-grupo {
    margin-bottom: 20px;
}

.form-grupo label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--color-principal);
}

.form-grupo input,
.form-grupo textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid #ecf0f1;
    border-radius: var(--border-radius);
    font-size: 1em;
    transition: var(--transicion);
}

.form-grupo input:focus,
.form-grupo textarea:focus {
    outline: none;
    border-color: var(--color-secundario);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-acciones {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Lista de dibujos */
.lista-dibujos {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.dibujo-item {
    padding: 15px;
    border: 2px solid #ecf0f1;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    cursor: pointer;
    transition: var(--transicion);
}

.dibujo-item:hover {
    border-color: var(--color-secundario);
    background: #e3f2fd;
}

.dibujo-item h4 {
    color: var(--color-principal);
    margin-bottom: 5px;
}

.dibujo-item p {
    color: var(--color-texto-claro);
    font-size: 0.9em;
}

.dibujo-item .dibujo-fecha {
    font-size: 0.8em;
    color: var(--color-texto-claro);
}

/* Responsive */
@media (max-width: 1200px) {
    #app {
        grid-template-areas: 
            "header header header"
            "herramientas dibujo capas"
            "estado estado estado";
        grid-template-columns: 200px 1fr 150px;
    }
    
    .panel-propiedades {
        display: none;
    }
}

@media (max-width: 768px) {
    #app {
        grid-template-areas: 
            "header"
            "herramientas"
            "dibujo"
            "estado";
        grid-template-columns: 1fr;
        grid-template-rows: 60px auto 1fr 40px;
    }
    
    .panel-capas {
        display: none;
    }
    
    .herramientas {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .header-controls {
        flex-wrap: wrap;
        gap: 5px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 0.8em;
    }
}

/* Utilidades */
.oculto {
    display: none !important;
}

.texto-centrado {
    text-align: center;
}

.cursor-lapiz {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><path d="M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04c.39-.39.39-1.02 0-1.41l-2.34-2.34c-.39-.39-1.02-.39-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z"/></svg>') 0 0, auto;
}

.cursor-borrador {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><rect x="2" y="8" width="16" height="8" fill="white" stroke="black" stroke-width="1"/></svg>') 0 0, auto;
}

.cursor-seleccionar {
    cursor: pointer;
}