/* --- Variables Globales del Tema Oscuro --- */
:root {
    --bg-main: #1a1a1a;
    --bg-section: #2c2c2c;
    --bg-input: #3a3a3a;
    --border-color: #4a4a4a;
    --text-primary: #e0e0e0;
    --text-secondary: #aaaaaa; /* Color para placeholders */
    
    --accent-color-primary: #00aaff;
    --accent-color-glow: rgba(0, 170, 255, 0.7);
    --shadow-glow: 0 0 15px var(--accent-color-glow);
    
    --color-danger: #ff4136;
    --color-success: #2ecc40;

    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius-main: 8px;
    --shadow-main: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* --- Estilos Base --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background: linear-gradient(160deg, #2a2a3a 0%, #1a1a1a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 2rem 1rem;
    min-height: 100vh;
}

h1, h2 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: #ffffff;
}

h1 {
    font-size: 1.75rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #ffffff, #c0c0c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

h2 {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* --- Estructura del Formulario --- */
#reporte-form {
    max-width: 1300px;
    margin: 0 auto;
    background: var(--bg-section);
    border-radius: var(--border-radius-main);
    box-shadow: var(--shadow-main);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #3a3a3a, #222);
    padding: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

.form-section {
    padding: 1.5rem 2rem;
    margin: 1.5rem;
    background: linear-gradient(145deg, #313131, #292929);
    border-radius: var(--border-radius-main);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.form-section:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.4), 0 0 10px rgba(0, 170, 255, 0.1);
}

.form-actions {
    padding: 1.5rem 2rem;
    background: rgba(0, 0, 0, 0.1);
    text-align: right;
}

/* --- Estilos de Campos (Inputs, Selects, etc.) --- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.form-grid-5-col {
    grid-template-columns: repeat(5, 1fr);
}

.form-grid.single-column {
    grid-template-columns: 1fr;
    max-width: 400px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"],
input[type="date"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

select:invalid,
select option[value=""] {
    color: var(--text-secondary);
}

select:valid {
    color: var(--text-primary);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-secondary);
}

/* --- Efecto de Resplandor (Glow) al enfocar --- */
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-color-primary);
    box-shadow: var(--shadow-glow);
}

input:read-only {
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--text-secondary);
    font-style: italic;
    cursor: not-allowed;
}

/* --- Estilos de Botones --- */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color-primary), #0077b3);
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--accent-color-glow);
}

.btn-add {
    background-color: transparent;
    border: 1px dashed var(--accent-color-primary);
    color: var(--accent-color-primary);
    margin-top: 1rem;
    width: 100%;
}

.btn-add:hover {
    background-color: rgba(0, 170, 255, 0.1);
    box-shadow: 0 0 15px var(--accent-color-glow);
}

.btn-danger {
    background-color: var(--color-danger);
    color: #ffffff;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background-color: #d7342a;
}

/* --- Estilos de Filas Dinámicas --- */
.dynamic-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.dynamic-row {
    display: grid;
    gap: 1rem;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.broca-row {
    grid-template-columns: 1fr 1fr 2fr 1fr 1fr auto;
}

.aditivo-row {
    grid-template-columns: 2fr 1fr 1fr auto;
}

.btn-eliminar {
    padding: 0.5rem 0.8rem;
    font-weight: bold;
}

/* --- Notificaciones Toast --- */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
    animation: slideIn 0.3s ease-out;
}

.toast.success {
    background-color: var(--color-success);
}

.toast.error {
    background-color: var(--color-danger);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* --- Estilos de Scrollbar --- */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-color-primary);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: #0077b3;
}

/* --- Diseño Adaptativo (Responsive) --- */
@media (max-width: 900px) {
    .form-grid-5-col {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}


@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }
    
    .form-section {
        padding: 1rem 1.5rem;
        margin: 0.5rem 0;
    }

    .form-grid,
    .form-grid-5-col {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Corrección del bug de layout en móvil */
    .broca-row,
    .aditivo-row {
        grid-template-columns: 1fr; /* Apila todo */
    }
    
    .btn-eliminar {
        width: 100%;
    }
}